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source: trunk/NEMO/OPA_SRC/cpl.F90 @ 392

Last change on this file since 392 was 352, checked in by opalod, 18 years ago
nemo_v1_update_033 : CT : Switch to IOIPSL-3-0 new library
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 29.2 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	!! $Header$
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	IF(lwp)WRITE(numout,cform_err)
89	IF(lwp)WRITE(numout,*) ' key_coupled and key_flx_bulk_... are incompatible'
90	nstop = nstop + 1
91	#endif
92
93	IF(lwp)WRITE(numout,*)' coupled simulation'
94	IF(lwp)WRITE(numout,*)' unit ',numlhf,' receive atm fluxes'
95	IF(lwp)WRITE(numout,*)' unit ',numlws,' receive windstress'
96	IF(lwp)WRITE(numout,*)' unit ',numlts,' transfer sst'
97	IF(lwp)WRITE(numout,*)' unit ',numlic,' transfer ice cover'
98
99
100	CALL cpl_read ! read the coupled mode information in namelist
101
102	CALL flush(numout)
103
104	! I- PIPE
105	! --------
106	! W A R N I N G : PIPE technique is temporary diseable (nov. 2000)
107
108	IF( cchan == 'PIPE' ) THEN
109
110	IF(lwp) WRITE(numout,*)
111	IF(lwp) WRITE(numout,*) 'Making pipes for fields to receive from CPL'
112	IF(lwp) WRITE(numout,*)
113	CALL flush(numout)
114	ierror = 0
115
116	! loop to define pipes (CPL=atmos to ocean)
117
118	DO jf = 1, nflxc2o
119	! CALL PIPE_Model_Define( numout, cpl_readflx(jf), jpread, info )
120	IF( info /= 0 ) ierror = ierror + 1
121	END DO
122	DO jf = 1, ntauc2o
123	! CALL PIPE_Model_Define( numout, cpl_readtau(jf), jpread, info )
124	IF( info /= 0 ) ierror = ierror + 1
125	END DO
126
127	IF(lwp) WRITE(numout,*) ' '
128	IF(lwp) WRITE(numout,*) 'Making pipes for fields to send to CPL'
129	IF(lwp) WRITE(numout,*) ' '
130
131	! loop to define pipes (ocean to atmos=CPL)
132
133	DO jf = 1, nfldo2c
134	! CALL PIPE_Model_Define( numout, cpl_writ(jf), jpwrit, info )
135	IF( info /= 0 ) ierror = ierror + 1
136	END DO
137
138	IF( ierror /= 0 ) THEN
139	IF(lwp) WRITE(numout,*)
140	IF(lwp) WRITE(numout,*) 'cpl_init: end of job due to error in pipes definitions'
141	CALL abort('')
142	END IF
143
144	IF(lwp) WRITE(numout,*)
145	IF(lwp) WRITE(numout,*) 'All pipes have been made'
146
147	IF(lwp) WRITE(numout,*)
148	IF(lwp) WRITE(numout,*) 'Communication test between OCE and CPL'
149	CALL flush(numout)
150
151	! CALL PIPE_Model_Stepi(numout, imess, nmodcpl, imesso, ierror)
152
153	IF( ierror /= 0 ) THEN
154	IF(lwp) WRITE(numout,*)
155	IF(lwp) WRITE(numout,*) 'cpl_init: end of job due to error in exchange first informations with Oasis'
156	CALL abort('')
157	END IF
158
159	IF(lwp) WRITE(numout,*)
160	IF(lwp) WRITE(numout,*) 'Communication test between OCE and CPL is OK'
161	IF(lwp) WRITE(numout,*) ' total simulation time in oasis = ',imesso(1)
162	IF(lwp) WRITE(numout,*) ' total number of iterations is = ',imesso(2)
163	IF(lwp) WRITE(numout,*) ' value of oasis timestep is = ',imesso(3)
164	IF(lwp) WRITE(numout,*) ' process id for oasis is = ',imesso(4)
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	! Define the experiment name :
179
180	cljobnam = 'IPC' ! as $JOBNAM in namcouple
181
182	! Attach to shared memory pool used to exchange initial infos
183
184	info = 0
185	! CALL SIPC_Init_Model (cljobnam, cplmodnam, 1, info)
186	IF( info /= 0 ) THEN
187	IF(lwp) WRITE(numout,*)
188	IF(lwp) WRITE(numout,*)'WARNING: Problem with attachement to',info
189	IF(lwp) WRITE(numout,*)' initial memory pool(s) in ocean'
190	IF(lwp) WRITE(numout,*)
191	CALL abort('STOP in ocean')
192	ENDIF
193
194	! Attach to pools used to exchange fields from ocean to coupler
195
196	DO jf = 1, nfldo2c
197	! Pool name:
198	clpoolnam = 'P'//cpl_writ(jf)
199	! CALL SIPC_Attach(clpoolnam, ipoolhandle)
200	! Resulting pool handle:
201	mpoolwrit(jf) = ipoolhandle
202	END DO
203
204	! Attach to pools used to exchange fields from coupler to ocean
205
206	DO jf = 1, nflxc2o
207	! Pool name:
208	clpoolnam = 'P'//cpl_readflx(jf)
209	! CALL SIPC_Attach(clpoolnam, ipoolhandle)
210	! Resulting pool handle:
211	mpoolread(jf) = ipoolhandle
212	END DO
213
214	DO jf = 1, ntauc2o
215	! Pool name:
216	clpoolnam = 'P'//cpl_readtau(jf)
217	! CALL SIPC_Attach(clpoolnam, ipoolhandle)
218	! Resulting pool handle:
219	mpoolread(jf+nflxc2o) = ipoolhandle
220	END DO
221
222	! Exchange of initial infos
223
224	! Write data array isend to pool READ by Oasis
225
226	info = 0
227	ipoolsize = 4*jpbyteint
228	! CALL SVIPC_write(mpoolinitr, imess, ipoolsize, info)
229
230	! Find error if any
231
232	IF( info < 0 ) THEN
233	IF(lwp) WRITE(numout,*)
234	IF(lwp) WRITE(numout,*) 'Problem in ocean in writing initial'
235	IF(lwp) WRITE(numout,*) 'infos to the shared memory segment(s)'
236	IF(lwp) WRITE(numout,*)
237	ELSE
238	IF(lwp) WRITE(numout,*)
239	IF(lwp) WRITE(numout,*) 'Initial infos written in ocean'
240	IF(lwp) WRITE(numout,*) 'to the shared memory segment(s)'
241	IF(lwp) WRITE(numout,*)
242	ENDIF
243
244	! Read data array irecv from pool written by Oasis
245
246	info = 0
247	ipoolsize = 4 * jpbyteint
248	CALL svipc_read(mpoolinitw, imesso, ipoolsize, info)
249
250	! Find error if any
251
252	IF( info < 0 ) THEN
253	IF(lwp) WRITE(numout,*) ' '
254	IF(lwp) WRITE(numout,*) 'Problem in ocean in reading initial'
255	IF(lwp) WRITE(numout,*) 'infos from the shared memory segment(s)'
256	IF(lwp) WRITE(numout,*) ' '
257	ELSE
258	IF(lwp) WRITE(numout,*) ' '
259	IF(lwp) WRITE(numout,*) 'Initial infos read by ocean'
260	IF(lwp) WRITE(numout,*) 'from the shared memory segment(s)'
261	IF(lwp) WRITE(numout,*) ' '
262	IF(lwp) WRITE(numout,*) ' ntime, niter, nstep, Oasis pid:'
263	IF(lwp) WRITE(numout,*) imesso(1), imesso(2), imesso(3), imesso(4)
264	ENDIF
265
266	! Detach from shared memory segment(s)
267
268	info = 0
269	! CALL SVIPC_close(mpoolinitw, 0, info)
270
271	! Find error if any
272
273	IF( info < 0 ) THEN
274	IF(lwp) WRITE(numout,*) 'Problem in detaching from shared memory segment(s)'
275	IF(lwp) WRITE(numout,*) 'used by ocean to read initial infos'
276	ENDIF
277
278	! III CLIM
279	! --------
280
281	ELSE IF( cchan == 'CLIM' ) THEN
282
283	! Define the number of processors involved in the coupling for
284	! Oasis (=1) and each model (as last two INTEGER on $CHATYPE line
285	! in the namcouple); they will be stored in a COMMON in mpiclim.h
286	! (used for CLIM/MPI2 only)
287	mpi_nproc(0)=1
288	mpi_nproc(1)=1
289	mpi_nproc(2)=1
290
291	! Define the number of processors used by each model as in
292	! $CHATYPE line of namcouple (used for CLIM/MPI2 only)
293	mpi_totproc(1)=1
294	mpi_totproc(2)=1
295
296	! Define names of each model as in $NBMODEL line of namcouple
297	! (used for CLIM/MPI2 only)
298	cmpi_modnam(1)='lmdz.x'
299	cmpi_modnam(2)=cplmodnam
300	!
301	! 1.1-Define the experiment name :
302
303	cljobnam = 'CLI' ! as $JOBNAM in namcouple
304
305	OPEN ( UNIT = 7, FILE = 'trace', STATUS = 'unknown', FORM = 'formatted')
306	CALL clim_init ( cljobnam, cplmodnam, 3, 7, &
307	kastp, kexch, kstep, &
308	5, 3600, 3600, info )
309
310	IF( info /= clim_ok ) THEN
311	IF(lwp) WRITE( numout, *) 'cpl_init : pb init clim, error code is = ', info
312	CALL abort( 'STOP in cpl_init' )
313	ELSE
314	IF(lwp) WRITE(numout,*) 'cpl_init : init clim ok '
315	ENDIF
316
317	iparal ( clim_strategy ) = clim_serial
318	iparal ( clim_length ) = jpiglo*jpjglo
319	iparal ( clim_offset ) = 0
320
321	! loop to define messages (CPL=atmos to ocean)
322	DO jf = 1, nflxc2o
323	CALL CLIM_Define ( cpl_readflx(jf), clim_in, clim_double, iparal, info )
324	END DO
325	DO jf = 1, ntauc2o
326	CALL CLIM_Define ( cpl_readtau(jf), clim_in, clim_double, iparal, info )
327	END DO
328
329	! loop to define messages (ocean to CPL=atmos)
330	DO jf = 1, nfldo2c
331	CALL CLIM_Define ( cpl_writ(jf), clim_out, clim_double, iparal, info )
332	END DO
333
334	IF(lwp) WRITE(numout,*) 'cpl_init : clim_define ok '
335
336	CALL CLIM_Start( imxtag, info )
337
338	IF( info /= clim_ok ) THEN
339	IF(lwp) WRITE(numout,*) 'cpl_init : pb start clim, error code is = ', info
340	CALL abort( 'stop in cpl_init' )
341	ELSE
342	IF(lwp) WRITE(numout,*) 'cpl_init : start clim ok '
343	ENDIF
344
345	CALL CLIM_Stepi ( cploasis, istep, ifcpl, idt, info )
346
347	IF( info /= clim_ok ) THEN
348	IF(lwp) WRITE(numout,*) ' warning : problem in getting step info from oasis '
349	IF(lwp) WRITE(numout,*) ' ======= error code number = ', info
350	ELSE
351	IF(lwp) WRITE(numout,*) ' got step information from oasis '
352	ENDIF
353	IF(lwp) WRITE(numout,*) ' number of tstep in oasis ', istep
354	IF(lwp) WRITE(numout,*) ' exchange frequency in oasis ', ifcpl
355	IF(lwp) WRITE(numout,*) ' length of tstep in oasis ', idt
356	ENDIF
357
358	END SUBROUTINE cpl_init
359
360
361	SUBROUTINE cpl_read
362	!!---------------------------------------------------------------------
363	!! * ROUTINE cpl_read *
364	!!
365	!! ** Purpose : Read and print options for the coupled run (namelist)
366	!!
367	!! ** Method : ???
368	!!
369	!! History :
370	!! 8.5 ! 02-12 (G. Madec) F90: Free form and module
371	!!----------------------------------------------------------------------
372	!! * Local declarations
373	INTEGER :: jf
374
375	NAMELIST/namcpl/ nexco, cchan, nmodcpl, cplmodnam, cploasis &
376	, nfldo2c, nflxc2o, ntauc2o, cpl_f_readflx, cpl_f_readtau &
377	, cpl_f_writ, cpl_readflx, cpl_readtau, cpl_writ
378	!!----------------------------------------------------------------------
379
380	IF(lwp) WRITE(numout,*)
381	IF(lwp) WRITE(numout,*) ' cpl_read : read the coupled parameters in namelist'
382	IF(lwp) WRITE(numout,*) ' ~~~~~~~~'
383	IF(lwp) WRITE(numout,*)
384
385	! Default values
386
387	nexco = 24
388	cchan='PIPE' ! echange TYPE
389	nmodcpl = 2
390	cplmodnam = 'opa.xx' ! model name : as $NBMODEL in namcouple
391	cploasis = 'Oasis' ! coupler name : as in coupler
392
393	! -Define symbolic name for fields exchanged from ocean to coupler,
394	! must be the same as (1) of the field definition in namcouple:
395	nfldo2c=2
396	cpl_writ(1)='SOSSTSST'
397	cpl_writ(2)='SOICECOV'
398
399	! -Define files name for fields exchanged from ocean to coupler,
400	! must be the same as (6) of the field definition in namcouple:
401	nflxc2o=6
402	cpl_readflx(1)='SONSFLDO' ! non solar heat flux (positif vers l'ocean)
403	cpl_readflx(2)='SOSHFLDO' ! solar flux
404	cpl_readflx(3)='SOTOPRSU' ! precip
405	cpl_readflx(4)='SOTFSHSU' ! evaporation
406	cpl_readflx(5)='SORUNCOA' ! coastal run-off
407	cpl_readflx(6)='SORIVFLU' ! river run-off
408	ntauc2o=2
409	cpl_readtau(1)='SOZOTAUX' ! first zonal wind stress
410	cpl_readtau(2)='SOZOTAU2' ! second zonal wind stress
411	cpl_readtau(3)='SOMETAUY' ! first meridien wind stress
412	cpl_readtau(4)='SOMETAU2' ! second meridien wind stress
413
414	! -Define files name for fields exchanged from ocean to coupler,
415	! must be the same as (6) of the field definition in namcouple:
416	cpl_f_writ(1)='ocesst'
417	cpl_f_writ(2)='oceice'
418
419	! -Define files name for fields exchanged from coupler to ocean
420	! must be the same as (7) of the field definition in namcouple:
421	cpl_f_readflx(1)='oceflx'
422	cpl_f_readflx(2)='oceflx'
423	cpl_f_readflx(3)='oceflx'
424	cpl_f_readflx(4)='oceflx'
425	cpl_f_readflx(5)='oceflx'
426	cpl_f_readflx(6)='oceflx'
427	cpl_f_readtau(1)='ocetau'
428	cpl_f_readtau(2)='ocetau'
429	cpl_f_readtau(3)='ocetau'
430	cpl_f_readtau(4)='ocetau'
431
432	! Namelist namcpl : coupling mode and frequency
433	REWIND( numnam )
434	READ ( numnam, namcpl )
435
436	IF(lwp) THEN
437	WRITE(numout,*) 'namcpl'
438	WRITE(numout,*)
439	WRITE(numout,*) ' Coupling exchange frequency nexco = ',nexco
440	WRITE(numout,*) ' Coupling exchange technique cchan = ',cchan
441	WRITE(numout,*) ' Mode Coupling technique nmodcpl = ',nmodcpl
442	WRITE(numout,*) ' Define the model name cplmodnam = ',cplmodnam
443	WRITE(numout,*) ' Define the coupler name cploasis = ',cploasis
444	WRITE(numout,*) ' Fields number ocean to coupler nfldo2c= ',nfldo2c
445	WRITE(numout,*) ' Flux fields coupler to ocean nflxc2o = ',nflxc2o
446	WRITE(numout,*) ' Stress fields coupler to ocean ntauc2o= ',ntauc2o
447	IF ( cchan == 'PIPE' .OR. cchan == 'pipe' ) THEN
448	cchan='PIPE'
449	WRITE(numout,*)'(communication between models made by pipes)'
450	ELSEIF( cchan == 'CLIM' .OR. cchan == 'clim' ) THEN
451	cchan='CLIM'
452	WRITE(numout,*)'(communication between models made by CLIM-PVM)'
453	ELSEIF( cchan == 'SIPC' .OR. cchan == 'sipc' ) THEN
454	cchan='SIPC'
455	WRITE(numout,*)'(communication between models made by the', &
456	'Share Memory Segment and Semaphore)'
457	ELSE
458	WRITE(numout,*) 'technic not yet implemented ',cchan
459	STOP 'in cpl_read'
460	ENDIF
461	DO jf = 1, nflxc2o
462	WRITE(numout,*) 'file to receive field number = ',jf,' ',cpl_f_readflx(jf)
463	END DO
464	DO jf = 1, ntauc2o
465	WRITE(numout,*) 'file to receive field number = ',jf,' ',cpl_f_readtau(jf)
466	END DO
467	DO jf = 1, nfldo2c
468	WRITE(numout,*) 'file to send field number = ',jf,' ',cpl_f_writ(jf)
469	END DO
470	WRITE(numout,*) ' fields received from coupler'
471	DO jf = 1, nflxc2o
472	WRITE(numout,*) 'symbolic name for field number = ',jf,' ',cpl_readflx(jf)
473	END DO
474	DO jf = 1, ntauc2o
475	WRITE(numout,*) 'symbolic name for field number = ',jf,' ',cpl_readtau(jf)
476	END DO
477	WRITE(numout,*) ' fields send to coupler'
478	DO jf = 1, nfldo2c
479	WRITE(numout,*) 'symbolic name for field number = ',jf,' ',cpl_writ(jf)
480	END DO
481	ENDIF
482
483	END SUBROUTINE cpl_read
484
485
486	SUBROUTINE cpl_stp( kt )
487	!!---------------------------------------------------------------------
488	!! * ROUTINE cpl_stp *
489	!! *****************
490	!! * OASIS routine *
491	!! *****************
492	!! ** Purpose : - At each coupling time-step,this routine sends fields
493	!! like sst or ice cover to the coupler.
494	!! - At each time-step computes time average values
495	!! - Specific treatment for the last time-step
496	!!
497	!! ** Method : 3 types available:
498	!! a) Use named pipes(FIFO) to exchange process identifiers
499	!! between the 3 programs
500	!! b) USE a messag passing method with PVM language (CLIM)
501	!! c) USE SVIPC method
502	!!
503	!! History :
504	!! ! 92-09 (L. Terray) Original code
505	!! ! 96-07 (L. Terray) OASIS version 2
506	!! ! 96-11 (E. Guilyardi) run-off + Taux,Tauy x2
507	!! ! 98-04 (M.A Foujols, S. Valcke, M. Imbard) OASIS2.2
508	!! 8.5 ! 02-06 (G. Madec) F90: Free form and module
509	!!----------------------------------------------------------------------
510	!! * modules used
511	USE ioipsl
512	USE phycst ! physical constants
513
514	!! * Arguments
515	INTEGER, INTENT( in ) :: kt ! ocean time-step
516
517	!! * Local declarations
518	INTEGER :: ji, jj, jn, jf ! dummy loop indexes
519	INTEGER :: icstep, info, ierror, isize
520	INTEGER :: iflmax, iunmax
521	INTEGER :: ifile(jpmaxfld), ifield(jpmaxfld)
522	CHARACTER (len=8) :: clfile(jpmaxfld)
523	LOGICAL :: llfind
524	REAL(wp), DIMENSION(jpiglo,jpjglo) :: &
525	zstoc, zieoc, zalboc, zticoc
526
527	! netcdf outputs
528
529	CHARACTER (len=80) :: clcplsnam
530	INTEGER, SAVE :: nhoridcs, nidcs, ndexcs(1)
531	LOGICAL, SAVE :: lfirsts = .TRUE.
532	REAL(wp) :: zjulian
533
534	! Additions for SVIPC
535
536	INTEGER :: index
537	! INTEGER, DIMENSION(3) :: infos
538	CHARACTER (len=3) :: clmodinf ! Header or not
539	! CHARACTER (len=3) :: cljobnam ! experiment name
540	!!----------------------------------------------------------------------
541
542	! coupled mode Ocean/Atmosphere
543
544	! 0. Initialization
545	! -----------------
546
547	isize = jpiglo * jpjglo
548
549	! First time step: ocean sst and ice sea-ice extend set to zero
550	IF( kt == nit000 ) THEN
551	sstoc(:,:) = 0.e0
552	sieoc(:,:) = 0.e0
553	alboc(:,:) = 0.e0
554	ticoc(:,:) = 0.e0
555
556	! initialisation for netcdf outputs
557	!
558	ndexcs(:) = 0
559	clcplsnam = "cpl_oce_sst"
560
561	! Compute julian date from starting date of the run
562	CALL ymds2ju( nyear, nmonth, nday, 0.e0, zjulian )
563	CALL histbeg(clcplsnam, jpiglo, glamt, jpjglo, gphit, &
564	1, jpiglo, 1, jpjglo, 0, &
565	zjulian, rdt, nhoridcs, nidcs, domain_id=nidom)
566	! no vertical axis
567	DO jf = 1, nfldo2c
568	CALL histdef(nidcs, cpl_writ(jf),cpl_writ(jf),"-",jpi, &
569	jpj, nhoridcs, 1, 1, 1, -99, 32, "inst", rdt, rdt)
570	END DO
571	CALL histend(nidcs)
572	ENDIF
573
574	! 1. Cumulated sst and sea-ice extend
575	!------------------------------------
576
577	sstoc(:,:) = sstoc(:,:) + ( 1.0 - freeze(:,:) ) * ( tn(:,:,1) + rt0 )
578	sieoc(:,:) = sieoc(:,:) + freeze(:,:)
579
580	#if defined key_ice_lim
581	alboc(:,:) = alboc(:,:) + freeze(:,:) * alb_ice(:,:)
582	ticoc(:,:) = ticoc(:,:) + freeze(:,:) * tn_ice(:,:)
583	#else
584	alboc(:,:) = alboc(:,:) + freeze(:,:) * 0.8
585	ticoc(:,:) = ticoc(:,:) + freeze(:,:) * ( -10.e0 + rt0 )
586	#endif
587
588
589	! 2. Send coupling fields to OASIS
590	!---------------------------------
591
592	IF( MOD( kt, nexco ) == 0 ) THEN
593
594	! 2.1 Average : mean coupling fields
595	zstoc (:,:) = 0.e0
596	zieoc (:,:) = 0.e0
597	zalboc(:,:) = 0.e0
598	zticoc(:,:) = 0.e0
599	DO jj = 1, nlcj
600	DO ji = 1, nlci
601	zstoc (mig(ji),mjg(jj)) = sstoc(ji,jj) / FLOAT( nexco )
602	zieoc (mig(ji),mjg(jj)) = sieoc(ji,jj) / FLOAT( nexco )
603	zalboc(mig(ji),mjg(jj)) = alboc(ji,jj) / FLOAT( nexco )
604	zticoc(mig(ji),mjg(jj)) = ticoc(ji,jj) / FLOAT( nexco )
605	END DO
606	END DO
607	icstep = kt - nit000 + 1
608
609	WRITE(numout,*)
610	WRITE(numout,*) 'STEP: Send fields to CPL with kt= ', kt
611	WRITE(numout,*)
612
613	! outputs
614
615	CALL histwrite( nidcs, cpl_writ(1), kt, zstoc , jpi*jpj, ndexcs )
616	CALL histwrite( nidcs, cpl_writ(2), kt, zieoc , jpi*jpj, ndexcs )
617	CALL histwrite( nidcs, cpl_writ(3), kt, zalboc, jpi*jpj, ndexcs )
618	CALL histwrite( nidcs, cpl_writ(4), kt, zticoc, jpi*jpj, ndexcs )
619	CALL histsync ( nidcs )
620
621	! 2.2 Last time step (clim or pipe) or pipe mode
622	!
623	IF( kt == nitend .OR. cchan == 'PIPE' ) THEN
624
625	! finalize outputs
626
627	CALL histclo( nidcs )
628
629	! WRITE fields for coupler with pipe technique or for last time step
630
631	! initialisation
632
633	iflmax = 1
634	iunmax = 99
635
636	clfile(iflmax) = cpl_f_writ(iflmax) ! keeps first file name
637	ifile(iflmax) = iunmax ! keeps first file unit
638	iunmax = iunmax - 1 ! decrements file unit maximum
639	ifield(1) = ifile(iflmax) ! keeps file unit for field
640
641	! different files names counter
642	DO jf = 2, nfldo2c
643	llfind = .FALSE.
644	DO jn = 1, iflmax
645	IF( .NOT. llfind ) THEN
646	IF( cpl_f_writ(jf) == clfile(jn) ) THEN
647	ifield(jf) = ifile(jn) ! keep file unit for field
648	llfind = .TRUE.
649	ENDIF
650	END IF
651	END DO
652	IF( .NOT. llfind) THEN
653	iflmax = iflmax + 1 ! increment the number of different files
654	clfile(iflmax) = cpl_f_writ(jf) ! keep file name
655	ifile (iflmax) = iunmax ! keep file unit for file
656	ifield(jf) = ifile(iflmax) ! keep file unit for field
657	iunmax = iunmax-1 ! decrement unit maximum number from 99 to 98...
658	ENDIF
659	END DO
660	!
661	DO jn = 1, iflmax
662	OPEN (ifile(jn), FILE=clfile(jn), FORM='UNFORMATTED')
663	END DO
664	!
665	DO jf = 1, nfldo2c
666	IF( jf == 1 ) CALL locwrite(cpl_writ(jf),zstoc , isize, ifield(jf), ierror, numout)
667	IF( jf == 2 ) CALL locwrite(cpl_writ(jf),zieoc , isize, ifield(jf), ierror, numout)
668	IF( jf == 3 ) CALL locwrite(cpl_writ(jf),zalboc, isize, ifield(jf), ierror, numout)
669	IF( jf == 4 ) CALL locwrite(cpl_writ(jf),zticoc, isize, ifield(jf), ierror, numout)
670	END DO
671
672	! simulate a FLUSH
673
674	DO jn = 1, iflmax
675	CLOSE( ifile(jn) )
676	END DO
677
678	! Clim mode
679	IF( cchan == 'CLIM' ) THEN ! inform PVM daemon, I have finished
680	CALL CLIM_Quit( CLIM_ContPvm, info )
681	IF( info /= CLIM_Ok ) THEN
682	WRITE (6, *) 'An error occured while leaving CLIM. Error = ',info
683	ENDIF
684	ENDIF
685
686	ENDIF
687
688	! IF last we have finished if not pass info to the atmosphere
689
690	IF ( kt /= nitend ) THEN
691
692	! 2.3 normal exchange
693
694	! PIPE mode
695	IF( cchan == 'PIPE' ) THEN
696
697	! Send message to pipes for CPL=atmosphere
698
699	! DO jf = 1, nfldo2c
700	! CALL PIPE_Model_Send(cpl_writ(jf), icstep, numout)
701	! END DO
702
703	! SIPC mode
704	ELSE IF( cchan == 'SIPC' ) THEN
705
706	! Define IF a header must be encapsulated within the field brick :
707	clmodinf = 'NOT' ! as $MODINFO in namcouple
708
709	! IF clmodinf = 'YES', define encapsulated infos to be exchanged
710	! infos(1) = initial date
711	! infos(2) = timestep
712	! infos(3) = actual time
713	!
714	! Writing of output field SST SOSSTSST
715	!
716	! Index of SST in total number of fields jpfldo2a:
717	index = 1
718	!
719	! CALL SIPC_Write_Model(index, isize, clmodinf, cljobnam, infos, zstoc)
720	!
721	! Writing of output field Sea-Ice SOICECOV
722	!
723	! Index of sea-ice in total number of fields jpfldo2a:
724	index = 2
725	!
726	! CALL SIPC_Write_Model(index, isize, clmodinf, cljobnam, infos, zieoc)
727
728	! CLIM mode
729	ELSE IF( cchan == 'CLIM' ) THEN
730
731	DO jn = 1, nfldo2c
732
733	IF (jn == 1) CALL CLIM_Export(cpl_writ(jn), icstep, zstoc , info)
734	IF (jn == 2) CALL CLIM_Export(cpl_writ(jn), icstep, zieoc , info)
735	IF (jn == 3) CALL CLIM_Export(cpl_writ(jn), icstep, zalboc, info)
736	IF (jn == 4) CALL CLIM_Export(cpl_writ(jn), icstep, zticoc, info)
737
738	IF (info /= CLIM_Ok) THEN
739	WRITE (numout,*) 'STEP : Pb giving', cpl_writ(jn), ':', jn
740	WRITE (numout,*) ' at timestep = ', icstep, 'kt = ', kt
741	WRITE (numout,*) 'Clim error code is = ',info
742	WRITE (numout,*) 'STOP in stpcpl '
743	CALL abort(' stpcpl ')
744	ENDIF
745	END DO
746	ENDIF
747
748	! reset cumulative sst and sea-ice extend to zero
749	sstoc(:,:) = 0.e0
750	sieoc(:,:) = 0.e0
751	alboc(:,:) = 0.e0
752	ticoc(:,:) = 0.e0
753	ENDIF
754	ENDIF
755
756	END SUBROUTINE cpl_stp
757
758	#else
759	!!----------------------------------------------------------------------
760	!! Default case Dummy module forced Ocean/Atmosphere
761	!!----------------------------------------------------------------------
762	CONTAINS
763	SUBROUTINE cpl_init ! Dummy routine
764	WRITE(,) 'cpl_init: You should have not see this print! error?'
765	END SUBROUTINE cpl_init
766	SUBROUTINE cpl_stp( kt ) ! Dummy routine
767	WRITE(,) 'cpl_stp: You should have not see this print! error?', kt
768	END SUBROUTINE cpl_stp
769	#endif
770
771	!!======================================================================
772	END MODULE cpl

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