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source: trunk/NEMO/OPA_SRC/cpl.F90 @ 142

Last change on this file since 142 was 142, checked in by opalod, 20 years ago
CL + CT: BUGFIX087: Add missing "USE daymod" and "USE phycst" modules
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 29.0 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 , LODYC-IPSL (2003)
31	!!----------------------------------------------------------------------
32
33	CONTAINS
34
35	SUBROUTINE cpl_init( kastp, kexch, kstep )
36	!!---------------------------------------------------------------------
37	!! * ROUTINE cpl_init *
38	!!
39	!! ** Purpose : Initialize coupled mode communication for ocean
40	!! exchange process identifiers and timestep information
41	!! between AGCM, OGCM and COUPLER. (OASIS software)
42	!!
43	!! ** Method : 3 types :
44	!! a) Use named pipes(FIFO) to exchange process identifiers
45	!! between the 3 programs
46	!! b) USE a messag passing method with PVM language (CLIM)
47	!! c) USE SVIPC method
48	!!
49	!! ** Input : npiat : agcm process identifier
50	!! npicp : coupler process identifier
51	!! npioc : ogcm process identifier
52	!!
53	!! Reference : see Epicoa 0803 (1992)
54	!!
55	!! History :
56	!! ! 92-09 (L. Terray) Original code
57	!! ! 96-07 (L. Terray) OASIS version 2
58	!! ! 96-11 (E. Guilyardi) run-off + Taux,Tauy x2
59	!! ! 98-04 (M.A Foujols, S. Valcke, M. Imbard) OASIS2.2
60	!! 8.5 ! 02-09 (G. Madec) F90: Free form and module
61	!!----------------------------------------------------------------------
62	!! * Arguments
63	INTEGER, INTENT(in ) :: &
64	kastp, & ! total number of timesteps in oceanic model
65	kexch, & ! frequency of exchange for the fluxes (in time steps)
66	kstep ! timestep value (in seconds)
67
68	!! * Local declarations
69	INTEGER,DIMENSION(3) :: iparal
70	INTEGER :: ifcpl, idt, info, imxtag, istep
71
72	CHARACTER (len=9) :: clpoolnam
73	INTEGER :: ipoolhandle, ipoolsize, jf
74	CHARACTER (len=3) :: cljobnam ! experiment name
75	INTEGER :: ierror
76	! INTEGER,DIMENSION(4) :: imess
77	INTEGER,DIMENSION(4) :: imesso
78	!!----------------------------------------------------------------------
79
80	IF(lwp) WRITE(numout,*)
81	IF(lwp) WRITE(numout,*) 'cpl_init : initialization in coupled ocean/atmosphere case'
82	IF(lwp) WRITE(numout,*) '~~~~~~~~'
83	IF(lwp) WRITE(numout,*)
84
85	#if defined key_flx_bulk_monthly \|\| defined key_flx_bulk_daily \|\| defined key_flx_forced_daily
86	IF(lwp)WRITE(numout,cform_err)
87	IF(lwp)WRITE(numout,*) ' key_coupled and key_flx_bulk_... are incompatible'
88	nstop = nstop + 1
89	#endif
90
91	IF(lwp)WRITE(numout,*)' coupled simulation'
92	IF(lwp)WRITE(numout,*)' unit ',numlhf,' receive atm fluxes'
93	IF(lwp)WRITE(numout,*)' unit ',numlws,' receive windstress'
94	IF(lwp)WRITE(numout,*)' unit ',numlts,' transfer sst'
95	IF(lwp)WRITE(numout,*)' unit ',numlic,' transfer ice cover'
96
97
98	CALL cpl_read ! read the coupled mode information in namelist
99
100	CALL flush(numout)
101
102	! I- PIPE
103	! --------
104	! W A R N I N G : PIPE technique is temporary diseable (nov. 2000)
105
106	IF( cchan == 'PIPE' ) THEN
107
108	IF(lwp) WRITE(numout,*)
109	IF(lwp) WRITE(numout,*) 'Making pipes for fields to receive from CPL'
110	IF(lwp) WRITE(numout,*)
111	CALL flush(numout)
112	ierror = 0
113
114	! loop to define pipes (CPL=atmos to ocean)
115
116	DO jf = 1, nflxc2o
117	! CALL PIPE_Model_Define( numout, cpl_readflx(jf), jpread, info )
118	IF( info /= 0 ) ierror = ierror + 1
119	END DO
120	DO jf = 1, ntauc2o
121	! CALL PIPE_Model_Define( numout, cpl_readtau(jf), jpread, info )
122	IF( info /= 0 ) ierror = ierror + 1
123	END DO
124
125	IF(lwp) WRITE(numout,*) ' '
126	IF(lwp) WRITE(numout,*) 'Making pipes for fields to send to CPL'
127	IF(lwp) WRITE(numout,*) ' '
128
129	! loop to define pipes (ocean to atmos=CPL)
130
131	DO jf = 1, nfldo2c
132	! CALL PIPE_Model_Define( numout, cpl_writ(jf), jpwrit, info )
133	IF( info /= 0 ) ierror = ierror + 1
134	END DO
135
136	IF( ierror /= 0 ) THEN
137	IF(lwp) WRITE(numout,*)
138	IF(lwp) WRITE(numout,*) 'cpl_init: end of job due to error in pipes definitions'
139	CALL abort('')
140	END IF
141
142	IF(lwp) WRITE(numout,*)
143	IF(lwp) WRITE(numout,*) 'All pipes have been made'
144
145	IF(lwp) WRITE(numout,*)
146	IF(lwp) WRITE(numout,*) 'Communication test between OCE and CPL'
147	CALL flush(numout)
148
149	! CALL PIPE_Model_Stepi(numout, imess, nmodcpl, imesso, ierror)
150
151	IF( ierror /= 0 ) THEN
152	IF(lwp) WRITE(numout,*)
153	IF(lwp) WRITE(numout,*) 'cpl_init: end of job due to error in exchange first informations with Oasis'
154	CALL abort('')
155	END IF
156
157	IF(lwp) WRITE(numout,*)
158	IF(lwp) WRITE(numout,*) 'Communication test between OCE and CPL is OK'
159	IF(lwp) WRITE(numout,*) ' total simulation time in oasis = ',imesso(1)
160	IF(lwp) WRITE(numout,*) ' total number of iterations is = ',imesso(2)
161	IF(lwp) WRITE(numout,*) ' value of oasis timestep is = ',imesso(3)
162	IF(lwp) WRITE(numout,*) ' process id for oasis is = ',imesso(4)
163	CALL flush(numout)
164
165	! II SVIPC
166	! ---------
167	! W A R N I N G : SVIPC technique is temporary diseable (nov. 2000)
168
169
170	ELSE IF( cchan == 'SIPC' ) THEN
171
172	! debug for more information
173
174	! CALL SVIPC_debug(1)
175
176	! Define the experiment name :
177
178	cljobnam = 'IPC' ! as $JOBNAM in namcouple
179
180	! Attach to shared memory pool used to exchange initial infos
181
182	info = 0
183	! CALL SIPC_Init_Model (cljobnam, cplmodnam, 1, info)
184	IF( info /= 0 ) THEN
185	IF(lwp) WRITE(numout,*)
186	IF(lwp) WRITE(numout,*)'WARNING: Problem with attachement to',info
187	IF(lwp) WRITE(numout,*)' initial memory pool(s) in ocean'
188	IF(lwp) WRITE(numout,*)
189	CALL abort('STOP in ocean')
190	ENDIF
191
192	! Attach to pools used to exchange fields from ocean to coupler
193
194	DO jf = 1, nfldo2c
195	! Pool name:
196	clpoolnam = 'P'//cpl_writ(jf)
197	! CALL SIPC_Attach(clpoolnam, ipoolhandle)
198	! Resulting pool handle:
199	mpoolwrit(jf) = ipoolhandle
200	END DO
201
202	! Attach to pools used to exchange fields from coupler to ocean
203
204	DO jf = 1, nflxc2o
205	! Pool name:
206	clpoolnam = 'P'//cpl_readflx(jf)
207	! CALL SIPC_Attach(clpoolnam, ipoolhandle)
208	! Resulting pool handle:
209	mpoolread(jf) = ipoolhandle
210	END DO
211
212	DO jf = 1, ntauc2o
213	! Pool name:
214	clpoolnam = 'P'//cpl_readtau(jf)
215	! CALL SIPC_Attach(clpoolnam, ipoolhandle)
216	! Resulting pool handle:
217	mpoolread(jf+nflxc2o) = ipoolhandle
218	END DO
219
220	! Exchange of initial infos
221
222	! Write data array isend to pool READ by Oasis
223
224	info = 0
225	ipoolsize = 4*jpbyteint
226	! CALL SVIPC_write(mpoolinitr, imess, ipoolsize, info)
227
228	! Find error if any
229
230	IF( info < 0 ) THEN
231	IF(lwp) WRITE(numout,*)
232	IF(lwp) WRITE(numout,*) 'Problem in ocean in writing initial'
233	IF(lwp) WRITE(numout,*) 'infos to the shared memory segment(s)'
234	IF(lwp) WRITE(numout,*)
235	ELSE
236	IF(lwp) WRITE(numout,*)
237	IF(lwp) WRITE(numout,*) 'Initial infos written in ocean'
238	IF(lwp) WRITE(numout,*) 'to the shared memory segment(s)'
239	IF(lwp) WRITE(numout,*)
240	ENDIF
241
242	! Read data array irecv from pool written by Oasis
243
244	info = 0
245	ipoolsize = 4 * jpbyteint
246	CALL svipc_read(mpoolinitw, imesso, ipoolsize, info)
247
248	! Find error if any
249
250	IF( info < 0 ) THEN
251	IF(lwp) WRITE(numout,*) ' '
252	IF(lwp) WRITE(numout,*) 'Problem in ocean in reading initial'
253	IF(lwp) WRITE(numout,*) 'infos from the shared memory segment(s)'
254	IF(lwp) WRITE(numout,*) ' '
255	ELSE
256	IF(lwp) WRITE(numout,*) ' '
257	IF(lwp) WRITE(numout,*) 'Initial infos read by ocean'
258	IF(lwp) WRITE(numout,*) 'from the shared memory segment(s)'
259	IF(lwp) WRITE(numout,*) ' '
260	IF(lwp) WRITE(numout,*) ' ntime, niter, nstep, Oasis pid:'
261	IF(lwp) WRITE(numout,*) imesso(1), imesso(2), imesso(3), imesso(4)
262	ENDIF
263
264	! Detach from shared memory segment(s)
265
266	info = 0
267	! CALL SVIPC_close(mpoolinitw, 0, info)
268
269	! Find error if any
270
271	IF( info < 0 ) THEN
272	IF(lwp) WRITE(numout,*) 'Problem in detaching from shared memory segment(s)'
273	IF(lwp) WRITE(numout,*) 'used by ocean to read initial infos'
274	ENDIF
275
276	! III CLIM
277	! --------
278
279	ELSE IF( cchan == 'CLIM' ) THEN
280
281	! Define the number of processors involved in the coupling for
282	! Oasis (=1) and each model (as last two INTEGER on $CHATYPE line
283	! in the namcouple); they will be stored in a COMMON in mpiclim.h
284	! (used for CLIM/MPI2 only)
285	mpi_nproc(0)=1
286	mpi_nproc(1)=1
287	mpi_nproc(2)=1
288
289	! Define the number of processors used by each model as in
290	! $CHATYPE line of namcouple (used for CLIM/MPI2 only)
291	mpi_totproc(1)=1
292	mpi_totproc(2)=1
293
294	! Define names of each model as in $NBMODEL line of namcouple
295	! (used for CLIM/MPI2 only)
296	cmpi_modnam(1)='lmdz.x'
297	cmpi_modnam(2)=cplmodnam
298	!
299	! 1.1-Define the experiment name :
300
301	cljobnam = 'CLI' ! as $JOBNAM in namcouple
302
303	OPEN ( UNIT = 7, FILE = 'trace', STATUS = 'unknown', FORM = 'formatted')
304	CALL clim_init ( cljobnam, cplmodnam, 3, 7, &
305	kastp, kexch, kstep, &
306	5, 3600, 3600, info )
307
308	IF( info /= clim_ok ) THEN
309	IF(lwp) WRITE( numout, *) 'cpl_init : pb init clim, error code is = ', info
310	CALL abort( 'STOP in cpl_init' )
311	ELSE
312	IF(lwp) WRITE(numout,*) 'cpl_init : init clim ok '
313	ENDIF
314
315	iparal ( clim_strategy ) = clim_serial
316	iparal ( clim_length ) = jpiglo*jpjglo
317	iparal ( clim_offset ) = 0
318
319	! loop to define messages (CPL=atmos to ocean)
320	DO jf = 1, nflxc2o
321	CALL CLIM_Define ( cpl_readflx(jf), clim_in, clim_double, iparal, info )
322	END DO
323	DO jf = 1, ntauc2o
324	CALL CLIM_Define ( cpl_readtau(jf), clim_in, clim_double, iparal, info )
325	END DO
326
327	! loop to define messages (ocean to CPL=atmos)
328	DO jf = 1, nfldo2c
329	CALL CLIM_Define ( cpl_writ(jf), clim_out, clim_double, iparal, info )
330	END DO
331
332	IF(lwp) WRITE(numout,*) 'cpl_init : clim_define ok '
333
334	CALL CLIM_Start( imxtag, info )
335
336	IF( info /= clim_ok ) THEN
337	IF(lwp) WRITE(numout,*) 'cpl_init : pb start clim, error code is = ', info
338	CALL abort( 'stop in cpl_init' )
339	ELSE
340	IF(lwp) WRITE(numout,*) 'cpl_init : start clim ok '
341	ENDIF
342
343	CALL CLIM_Stepi ( cploasis, istep, ifcpl, idt, info )
344
345	IF( info /= clim_ok ) THEN
346	IF(lwp) WRITE(numout,*) ' warning : problem in getting step info from oasis '
347	IF(lwp) WRITE(numout,*) ' ======= error code number = ', info
348	ELSE
349	IF(lwp) WRITE(numout,*) ' got step information from oasis '
350	ENDIF
351	IF(lwp) WRITE(numout,*) ' number of tstep in oasis ', istep
352	IF(lwp) WRITE(numout,*) ' exchange frequency in oasis ', ifcpl
353	IF(lwp) WRITE(numout,*) ' length of tstep in oasis ', idt
354	ENDIF
355
356	END SUBROUTINE cpl_init
357
358
359	SUBROUTINE cpl_read
360	!!---------------------------------------------------------------------
361	!! * ROUTINE cpl_read *
362	!!
363	!! ** Purpose : Read and print options for the coupled run (namelist)
364	!!
365	!! ** Method : ???
366	!!
367	!! History :
368	!! 8.5 ! 02-12 (G. Madec) F90: Free form and module
369	!!----------------------------------------------------------------------
370	!! * Local declarations
371	INTEGER :: jf
372
373	NAMELIST/namcpl/ nexco, cchan, nmodcpl, cplmodnam, cploasis &
374	, nfldo2c, nflxc2o, ntauc2o, cpl_f_readflx, cpl_f_readtau &
375	, cpl_f_writ, cpl_readflx, cpl_readtau, cpl_writ
376	!!----------------------------------------------------------------------
377
378	IF(lwp) WRITE(numout,*)
379	IF(lwp) WRITE(numout,*) ' cpl_read : read the coupled parameters in namelist'
380	IF(lwp) WRITE(numout,*) ' ~~~~~~~~'
381	IF(lwp) WRITE(numout,*)
382
383	! Default values
384
385	nexco = 24
386	cchan='PIPE' ! echange TYPE
387	nmodcpl = 2
388	cplmodnam = 'opa.xx' ! model name : as $NBMODEL in namcouple
389	cploasis = 'Oasis' ! coupler name : as in coupler
390
391	! -Define symbolic name for fields exchanged from ocean to coupler,
392	! must be the same as (1) of the field definition in namcouple:
393	nfldo2c=2
394	cpl_writ(1)='SOSSTSST'
395	cpl_writ(2)='SOICECOV'
396
397	! -Define files name for fields exchanged from ocean to coupler,
398	! must be the same as (6) of the field definition in namcouple:
399	nflxc2o=6
400	cpl_readflx(1)='SONSFLDO' ! non solar heat flux (positif vers l'ocean)
401	cpl_readflx(2)='SOSHFLDO' ! solar flux
402	cpl_readflx(3)='SOTOPRSU' ! precip
403	cpl_readflx(4)='SOTFSHSU' ! evaporation
404	cpl_readflx(5)='SORUNCOA' ! coastal run-off
405	cpl_readflx(6)='SORIVFLU' ! river run-off
406	ntauc2o=2
407	cpl_readtau(1)='SOZOTAUX' ! first zonal wind stress
408	cpl_readtau(2)='SOZOTAU2' ! second zonal wind stress
409	cpl_readtau(3)='SOMETAUY' ! first meridien wind stress
410	cpl_readtau(4)='SOMETAU2' ! second meridien wind stress
411
412	! -Define files name for fields exchanged from ocean to coupler,
413	! must be the same as (6) of the field definition in namcouple:
414	cpl_f_writ(1)='ocesst'
415	cpl_f_writ(2)='oceice'
416
417	! -Define files name for fields exchanged from coupler to ocean
418	! must be the same as (7) of the field definition in namcouple:
419	cpl_f_readflx(1)='oceflx'
420	cpl_f_readflx(2)='oceflx'
421	cpl_f_readflx(3)='oceflx'
422	cpl_f_readflx(4)='oceflx'
423	cpl_f_readflx(5)='oceflx'
424	cpl_f_readflx(6)='oceflx'
425	cpl_f_readtau(1)='ocetau'
426	cpl_f_readtau(2)='ocetau'
427	cpl_f_readtau(3)='ocetau'
428	cpl_f_readtau(4)='ocetau'
429
430	! Namelist namcpl : coupling mode and frequency
431	REWIND( numnam )
432	READ ( numnam, namcpl )
433
434	IF(lwp) THEN
435	WRITE(numout,*) 'namcpl'
436	WRITE(numout,*)
437	WRITE(numout,*) ' Coupling exchange frequency nexco = ',nexco
438	WRITE(numout,*) ' Coupling exchange technique cchan = ',cchan
439	WRITE(numout,*) ' Mode Coupling technique nmodcpl = ',nmodcpl
440	WRITE(numout,*) ' Define the model name cplmodnam = ',cplmodnam
441	WRITE(numout,*) ' Define the coupler name cploasis = ',cploasis
442	WRITE(numout,*) ' Fields number ocean to coupler nfldo2c= ',nfldo2c
443	WRITE(numout,*) ' Flux fields coupler to ocean nflxc2o = ',nflxc2o
444	WRITE(numout,*) ' Stress fields coupler to ocean ntauc2o= ',ntauc2o
445	IF ( cchan == 'PIPE' .OR. cchan == 'pipe' ) THEN
446	cchan='PIPE'
447	WRITE(numout,*)'(communication between models made by pipes)'
448	ELSEIF( cchan == 'CLIM' .OR. cchan == 'clim' ) THEN
449	cchan='CLIM'
450	WRITE(numout,*)'(communication between models made by CLIM-PVM)'
451	ELSEIF( cchan == 'SIPC' .OR. cchan == 'sipc' ) THEN
452	cchan='SIPC'
453	WRITE(numout,*)'(communication between models made by the', &
454	'Share Memory Segment and Semaphore)'
455	ELSE
456	WRITE(numout,*) 'technic not yet implemented ',cchan
457	STOP 'in cpl_read'
458	ENDIF
459	DO jf = 1, nflxc2o
460	WRITE(numout,*) 'file to receive field number = ',jf,' ',cpl_f_readflx(jf)
461	END DO
462	DO jf = 1, ntauc2o
463	WRITE(numout,*) 'file to receive field number = ',jf,' ',cpl_f_readtau(jf)
464	END DO
465	DO jf = 1, nfldo2c
466	WRITE(numout,*) 'file to send field number = ',jf,' ',cpl_f_writ(jf)
467	END DO
468	WRITE(numout,*) ' fields received from coupler'
469	DO jf = 1, nflxc2o
470	WRITE(numout,*) 'symbolic name for field number = ',jf,' ',cpl_readflx(jf)
471	END DO
472	DO jf = 1, ntauc2o
473	WRITE(numout,*) 'symbolic name for field number = ',jf,' ',cpl_readtau(jf)
474	END DO
475	WRITE(numout,*) ' fields send to coupler'
476	DO jf = 1, nfldo2c
477	WRITE(numout,*) 'symbolic name for field number = ',jf,' ',cpl_writ(jf)
478	END DO
479	ENDIF
480
481	END SUBROUTINE cpl_read
482
483
484	SUBROUTINE cpl_stp( kt )
485	!!---------------------------------------------------------------------
486	!! * ROUTINE cpl_stp *
487	!! *****************
488	!! * OASIS routine *
489	!! *****************
490	!! ** Purpose : - At each coupling time-step,this routine sends fields
491	!! like sst or ice cover to the coupler.
492	!! - At each time-step computes time average values
493	!! - Specific treatment for the last time-step
494	!!
495	!! ** Method : 3 types available:
496	!! a) Use named pipes(FIFO) to exchange process identifiers
497	!! between the 3 programs
498	!! b) USE a messag passing method with PVM language (CLIM)
499	!! c) USE SVIPC method
500	!!
501	!! History :
502	!! ! 92-09 (L. Terray) Original code
503	!! ! 96-07 (L. Terray) OASIS version 2
504	!! ! 96-11 (E. Guilyardi) run-off + Taux,Tauy x2
505	!! ! 98-04 (M.A Foujols, S. Valcke, M. Imbard) OASIS2.2
506	!! 8.5 ! 02-06 (G. Madec) F90: Free form and module
507	!!----------------------------------------------------------------------
508	!! * modules used
509	USE ioipsl
510	USE phycst ! physical constants
511
512	!! * Arguments
513	INTEGER, INTENT( in ) :: kt ! ocean time-step
514
515	!! * Local declarations
516	INTEGER :: ji, jj, jn, jf ! dummy loop indexes
517	INTEGER :: icstep, info, ierror, isize
518	INTEGER :: iflmax, iunmax
519	INTEGER :: ifile(jpmaxfld), ifield(jpmaxfld)
520	CHARACTER (len=8) :: clfile(jpmaxfld)
521	LOGICAL :: llfind
522	REAL(wp), DIMENSION(jpiglo,jpjglo) :: &
523	zstoc, zieoc, zalboc, zticoc
524
525	! netcdf outputs
526
527	CHARACTER (len=80) :: clcplsnam
528	INTEGER, SAVE :: nhoridcs, nidcs, ndexcs(1)
529	LOGICAL, SAVE :: lfirsts = .TRUE.
530	REAL(wp) :: zjulian
531
532	! Additions for SVIPC
533
534	INTEGER :: index
535	! INTEGER, DIMENSION(3) :: infos
536	CHARACTER (len=3) :: clmodinf ! Header or not
537	! CHARACTER (len=3) :: cljobnam ! experiment name
538	!!----------------------------------------------------------------------
539
540	! coupled mode Ocean/Atmosphere
541
542	! 0. Initialization
543	! -----------------
544
545	isize = jpiglo * jpjglo
546
547	! First time step: ocean sst and ice sea-ice extend set to zero
548	IF( kt == nit000 ) THEN
549	sstoc(:,:) = 0.e0
550	sieoc(:,:) = 0.e0
551	alboc(:,:) = 0.e0
552	ticoc(:,:) = 0.e0
553
554	! initialisation for netcdf outputs
555	!
556	ndexcs(:) = 0
557	clcplsnam = "cpl_oce_sst"
558
559	! Compute julian date from starting date of the run
560	CALL ymds2ju( nyear, nmonth, nday, 0.e0, zjulian )
561	CALL histbeg(clcplsnam, jpiglo, glamt, jpjglo, gphit, &
562	1, jpiglo, 1, jpjglo, 0, &
563	zjulian, rdt, nhoridcs, nidcs)
564	! no vertical axis
565	DO jf = 1, nfldo2c
566	CALL histdef(nidcs, cpl_writ(jf),cpl_writ(jf),"-",jpi, &
567	jpj, nhoridcs, 1, 1, 1, -99, 32, "inst", rdt, rdt)
568	END DO
569	CALL histend(nidcs)
570	ENDIF
571
572	! 1. Cumulated sst and sea-ice extend
573	!------------------------------------
574
575	sstoc(:,:) = sstoc(:,:) + ( 1.0 - freeze(:,:) ) * ( tn(:,:,1) + rt0 )
576	sieoc(:,:) = sieoc(:,:) + freeze(:,:)
577
578	#if defined key_ice_lim
579	alboc(:,:) = alboc(:,:) + freeze(:,:) * alb_ice(:,:)
580	ticoc(:,:) = ticoc(:,:) + freeze(:,:) * tn_ice(:,:)
581	#else
582	alboc(:,:) = alboc(:,:) + freeze(:,:) * 0.8
583	ticoc(:,:) = ticoc(:,:) + freeze(:,:) * ( -10.e0 + rt0 )
584	#endif
585
586
587	! 2. Send coupling fields to OASIS
588	!---------------------------------
589
590	IF( MOD( kt, nexco ) == 0 ) THEN
591
592	! 2.1 Average : mean coupling fields
593	zstoc (:,:) = 0.e0
594	zieoc (:,:) = 0.e0
595	zalboc(:,:) = 0.e0
596	zticoc(:,:) = 0.e0
597	DO jj = 1, nlcj
598	DO ji = 1, nlci
599	zstoc (mig(ji),mjg(jj)) = sstoc(ji,jj) / FLOAT( nexco )
600	zieoc (mig(ji),mjg(jj)) = sieoc(ji,jj) / FLOAT( nexco )
601	zalboc(mig(ji),mjg(jj)) = alboc(ji,jj) / FLOAT( nexco )
602	zticoc(mig(ji),mjg(jj)) = ticoc(ji,jj) / FLOAT( nexco )
603	END DO
604	END DO
605	icstep = kt - nit000 + 1
606
607	WRITE(numout,*)
608	WRITE(numout,*) 'STEP: Send fields to CPL with kt= ', kt
609	WRITE(numout,*)
610
611	! outputs
612
613	CALL histwrite( nidcs, cpl_writ(1), kt, zstoc , jpi*jpj, ndexcs )
614	CALL histwrite( nidcs, cpl_writ(2), kt, zieoc , jpi*jpj, ndexcs )
615	CALL histwrite( nidcs, cpl_writ(3), kt, zalboc, jpi*jpj, ndexcs )
616	CALL histwrite( nidcs, cpl_writ(4), kt, zticoc, jpi*jpj, ndexcs )
617	CALL histsync ( nidcs )
618
619	! 2.2 Last time step (clim or pipe) or pipe mode
620	!
621	IF( kt == nitend .OR. cchan == 'PIPE' ) THEN
622
623	! finalize outputs
624
625	CALL histclo( nidcs )
626
627	! WRITE fields for coupler with pipe technique or for last time step
628
629	! initialisation
630
631	iflmax = 1
632	iunmax = 99
633
634	clfile(iflmax) = cpl_f_writ(iflmax) ! keeps first file name
635	ifile(iflmax) = iunmax ! keeps first file unit
636	iunmax = iunmax - 1 ! decrements file unit maximum
637	ifield(1) = ifile(iflmax) ! keeps file unit for field
638
639	! different files names counter
640	DO jf = 2, nfldo2c
641	llfind = .FALSE.
642	DO jn = 1, iflmax
643	IF( .NOT. llfind ) THEN
644	IF( cpl_f_writ(jf) == clfile(jn) ) THEN
645	ifield(jf) = ifile(jn) ! keep file unit for field
646	llfind = .TRUE.
647	ENDIF
648	END IF
649	END DO
650	IF( .NOT. llfind) THEN
651	iflmax = iflmax + 1 ! increment the number of different files
652	clfile(iflmax) = cpl_f_writ(jf) ! keep file name
653	ifile (iflmax) = iunmax ! keep file unit for file
654	ifield(jf) = ifile(iflmax) ! keep file unit for field
655	iunmax = iunmax-1 ! decrement unit maximum number from 99 to 98...
656	ENDIF
657	END DO
658	!
659	DO jn = 1, iflmax
660	OPEN (ifile(jn), FILE=clfile(jn), FORM='UNFORMATTED')
661	END DO
662	!
663	DO jf = 1, nfldo2c
664	IF( jf == 1 ) CALL locwrite(cpl_writ(jf),zstoc , isize, ifield(jf), ierror, numout)
665	IF( jf == 2 ) CALL locwrite(cpl_writ(jf),zieoc , isize, ifield(jf), ierror, numout)
666	IF( jf == 3 ) CALL locwrite(cpl_writ(jf),zalboc, isize, ifield(jf), ierror, numout)
667	IF( jf == 4 ) CALL locwrite(cpl_writ(jf),zticoc, isize, ifield(jf), ierror, numout)
668	END DO
669
670	! simulate a FLUSH
671
672	DO jn = 1, iflmax
673	CLOSE( ifile(jn) )
674	END DO
675
676	! Clim mode
677	IF( cchan == 'CLIM' ) THEN ! inform PVM daemon, I have finished
678	CALL CLIM_Quit( CLIM_ContPvm, info )
679	IF( info /= CLIM_Ok ) THEN
680	WRITE (6, *) 'An error occured while leaving CLIM. Error = ',info
681	ENDIF
682	ENDIF
683
684	ENDIF
685
686	! IF last we have finished if not pass info to the atmosphere
687
688	IF ( kt /= nitend ) THEN
689
690	! 2.3 normal exchange
691
692	! PIPE mode
693	IF( cchan == 'PIPE' ) THEN
694
695	! Send message to pipes for CPL=atmosphere
696
697	! DO jf = 1, nfldo2c
698	! CALL PIPE_Model_Send(cpl_writ(jf), icstep, numout)
699	! END DO
700
701	! SIPC mode
702	ELSE IF( cchan == 'SIPC' ) THEN
703
704	! Define IF a header must be encapsulated within the field brick :
705	clmodinf = 'NOT' ! as $MODINFO in namcouple
706
707	! IF clmodinf = 'YES', define encapsulated infos to be exchanged
708	! infos(1) = initial date
709	! infos(2) = timestep
710	! infos(3) = actual time
711	!
712	! Writing of output field SST SOSSTSST
713	!
714	! Index of SST in total number of fields jpfldo2a:
715	index = 1
716	!
717	! CALL SIPC_Write_Model(index, isize, clmodinf, cljobnam, infos, zstoc)
718	!
719	! Writing of output field Sea-Ice SOICECOV
720	!
721	! Index of sea-ice in total number of fields jpfldo2a:
722	index = 2
723	!
724	! CALL SIPC_Write_Model(index, isize, clmodinf, cljobnam, infos, zieoc)
725
726	! CLIM mode
727	ELSE IF( cchan == 'CLIM' ) THEN
728
729	DO jn = 1, nfldo2c
730
731	IF (jn == 1) CALL CLIM_Export(cpl_writ(jn), icstep, zstoc , info)
732	IF (jn == 2) CALL CLIM_Export(cpl_writ(jn), icstep, zieoc , info)
733	IF (jn == 3) CALL CLIM_Export(cpl_writ(jn), icstep, zalboc, info)
734	IF (jn == 4) CALL CLIM_Export(cpl_writ(jn), icstep, zticoc, info)
735
736	IF (info /= CLIM_Ok) THEN
737	WRITE (numout,*) 'STEP : Pb giving', cpl_writ(jn), ':', jn
738	WRITE (numout,*) ' at timestep = ', icstep, 'kt = ', kt
739	WRITE (numout,*) 'Clim error code is = ',info
740	WRITE (numout,*) 'STOP in stpcpl '
741	CALL abort(' stpcpl ')
742	ENDIF
743	END DO
744	ENDIF
745
746	! reset cumulative sst and sea-ice extend to zero
747	sstoc(:,:) = 0.e0
748	sieoc(:,:) = 0.e0
749	alboc(:,:) = 0.e0
750	ticoc(:,:) = 0.e0
751	ENDIF
752	ENDIF
753
754	END SUBROUTINE cpl_stp
755
756	#else
757	!!----------------------------------------------------------------------
758	!! Default case Dummy module forced Ocean/Atmosphere
759	!!----------------------------------------------------------------------
760	CONTAINS
761	SUBROUTINE cpl_init ! Dummy routine
762	WRITE(,) 'cpl_init: You should have not see this print! error?'
763	END SUBROUTINE cpl_init
764	SUBROUTINE cpl_stp( kt ) ! Dummy routine
765	WRITE(,) 'cpl_stp: You should have not see this print! error?', kt
766	END SUBROUTINE cpl_stp
767	#endif
768
769	!!======================================================================
770	END MODULE cpl

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