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leapfrog.F @ 1626

Last change on this file since 1626 was 1626, checked in by Laurent Fairhead, 13 years ago

Modifications nécessaires sur les dates pour avoir 1+1=2 avec l'ancienne physique

Necessary modifications to ensure 1+1=2 with the old physics package

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1	!
2	! $Id: leapfrog.F 1626 2012-05-15 08:37:02Z fairhead $
3	!
4	c
5	c
6	SUBROUTINE leapfrog(ucov,vcov,teta,ps,masse,phis,q,clesphy0,
7	& time_0)
8
9
10	cIM : pour sortir les param. du modele dans un fis. netcdf 110106
11	#ifdef CPP_IOIPSL
12	use IOIPSL
13	#endif
14	USE infotrac
15	USE guide_mod, ONLY : guide_main
16	USE write_field
17	USE control_mod
18	IMPLICIT NONE
19
20	c ...... Version du 10/01/98 ..........
21
22	c avec coordonnees verticales hybrides
23	c avec nouveaux operat. dissipation * ( gradiv2,divgrad2,nxgraro2 )
24
25	c=======================================================================
26	c
27	c Auteur: P. Le Van /L. Fairhead/F.Hourdin
28	c -------
29	c
30	c Objet:
31	c ------
32	c
33	c GCM LMD nouvelle grille
34	c
35	c=======================================================================
36	c
37	c ... Dans inigeom , nouveaux calculs pour les elongations cu , cv
38	c et possibilite d'appeler une fonction f(y) a derivee tangente
39	c hyperbolique a la place de la fonction a derivee sinusoidale.
40
41	c ... Possibilite de choisir le shema pour l'advection de
42	c q , en modifiant iadv dans traceur.def (10/02) .
43	c
44	c Pour Van-Leer + Vapeur d'eau saturee, iadv(1)=4. (F.Codron,10/99)
45	c Pour Van-Leer iadv=10
46	c
47	c-----------------------------------------------------------------------
48	c Declarations:
49	c -------------
50
51	#include "dimensions.h"
52	#include "paramet.h"
53	#include "comconst.h"
54	#include "comdissnew.h"
55	#include "comvert.h"
56	#include "comgeom.h"
57	#include "logic.h"
58	#include "temps.h"
59	#include "ener.h"
60	#include "description.h"
61	#include "serre.h"
62	!#include "com_io_dyn.h"
63	#include "iniprint.h"
64	#include "academic.h"
65
66	! FH 2008/05/09 On elimine toutes les clefs physiques dans la dynamique
67	! #include "clesphys.h"
68
69	INTEGER longcles
70	PARAMETER ( longcles = 20 )
71	REAL clesphy0( longcles )
72
73	real zqmin,zqmax
74
75	c variables dynamiques
76	REAL vcov(ip1jm,llm),ucov(ip1jmp1,llm) ! vents covariants
77	REAL teta(ip1jmp1,llm) ! temperature potentielle
78	REAL q(ip1jmp1,llm,nqtot) ! champs advectes
79	REAL ps(ip1jmp1) ! pression au sol
80	REAL p (ip1jmp1,llmp1 ) ! pression aux interfac.des couches
81	REAL pks(ip1jmp1) ! exner au sol
82	REAL pk(ip1jmp1,llm) ! exner au milieu des couches
83	REAL pkf(ip1jmp1,llm) ! exner filt.au milieu des couches
84	REAL masse(ip1jmp1,llm) ! masse d'air
85	REAL phis(ip1jmp1) ! geopotentiel au sol
86	REAL phi(ip1jmp1,llm) ! geopotentiel
87	REAL w(ip1jmp1,llm) ! vitesse verticale
88
89	c variables dynamiques intermediaire pour le transport
90	REAL pbaru(ip1jmp1,llm),pbarv(ip1jm,llm) !flux de masse
91
92	c variables dynamiques au pas -1
93	REAL vcovm1(ip1jm,llm),ucovm1(ip1jmp1,llm)
94	REAL tetam1(ip1jmp1,llm),psm1(ip1jmp1)
95	REAL massem1(ip1jmp1,llm)
96
97	c tendances dynamiques
98	REAL dv(ip1jm,llm),du(ip1jmp1,llm)
99	REAL dteta(ip1jmp1,llm),dq(ip1jmp1,llm,nqtot),dp(ip1jmp1)
100
101	c tendances de la dissipation
102	REAL dvdis(ip1jm,llm),dudis(ip1jmp1,llm)
103	REAL dtetadis(ip1jmp1,llm)
104
105	c tendances physiques
106	REAL dvfi(ip1jm,llm),dufi(ip1jmp1,llm)
107	REAL dtetafi(ip1jmp1,llm),dqfi(ip1jmp1,llm,nqtot),dpfi(ip1jmp1)
108
109	c variables pour le fichier histoire
110	REAL dtav ! intervalle de temps elementaire
111
112	REAL tppn(iim),tpps(iim),tpn,tps
113	c
114	INTEGER itau,itaufinp1,iav
115	! INTEGER iday ! jour julien
116	REAL time
117
118	REAL SSUM
119	REAL time_0
120	! REAL finvmaold(ip1jmp1,llm)
121
122	cym LOGICAL lafin
123	LOGICAL :: lafin=.false.
124	INTEGER ij,iq,l
125	INTEGER ik
126
127	real time_step, t_wrt, t_ops
128
129	! REAL rdayvrai,rdaym_ini
130	! jD_cur: jour julien courant
131	! jH_cur: heure julienne courante
132	REAL :: jD_cur, jH_cur
133	INTEGER :: an, mois, jour
134	REAL :: secondes
135
136	LOGICAL first,callinigrads
137	cIM : pour sortir les param. du modele dans un fis. netcdf 110106
138	save first
139	data first/.true./
140	real dt_cum
141	character*10 infile
142	integer zan, tau0, thoriid
143	integer nid_ctesGCM
144	save nid_ctesGCM
145	real degres
146	real rlong(iip1), rlatg(jjp1)
147	real zx_tmp_2d(iip1,jjp1)
148	integer ndex2d(iip1*jjp1)
149	logical ok_sync
150	parameter (ok_sync = .true.)
151	logical physic
152
153	data callinigrads/.true./
154	character*10 string10
155
156	REAL alpha(ip1jmp1,llm),beta(ip1jmp1,llm)
157	REAL :: flxw(ip1jmp1,llm) ! flux de masse verticale
158
159	c+jld variables test conservation energie
160	REAL ecin(ip1jmp1,llm),ecin0(ip1jmp1,llm)
161	C Tendance de la temp. potentiel d (theta)/ d t due a la
162	C tansformation d'energie cinetique en energie thermique
163	C cree par la dissipation
164	REAL dtetaecdt(ip1jmp1,llm)
165	REAL vcont(ip1jm,llm),ucont(ip1jmp1,llm)
166	REAL vnat(ip1jm,llm),unat(ip1jmp1,llm)
167	REAL d_h_vcol, d_qt, d_qw, d_ql, d_ec
168	CHARACTER*15 ztit
169	!IM INTEGER ip_ebil_dyn ! PRINT level for energy conserv. diag.
170	!IM SAVE ip_ebil_dyn
171	!IM DATA ip_ebil_dyn/0/
172	c-jld
173
174	character*80 dynhist_file, dynhistave_file
175	character(len=*),parameter :: modname="leapfrog"
176	character*80 abort_message
177
178	logical dissip_conservative
179	save dissip_conservative
180	data dissip_conservative/.true./
181
182	LOGICAL prem
183	save prem
184	DATA prem/.true./
185	INTEGER testita
186	PARAMETER (testita = 9)
187
188	logical , parameter :: flag_verif = .false.
189
190
191	integer itau_w ! pas de temps ecriture = itap + itau_phy
192
193
194	itaufin = nday*day_step
195	itaufinp1 = itaufin +1
196	itau = 0
197	physic=.true.
198	if (iflag_phys==0.or.iflag_phys==2) physic=.false.
199
200	c iday = day_ini+itau/day_step
201	c time = REAL(itau-(iday-day_ini)*day_step)/day_step+time_0
202	c IF(time.GT.1.) THEN
203	c time = time-1.
204	c iday = iday+1
205	c ENDIF
206
207
208	c-----------------------------------------------------------------------
209	c On initialise la pression et la fonction d'Exner :
210	c --------------------------------------------------
211
212	dq(:,:,:)=0.
213	CALL pression ( ip1jmp1, ap, bp, ps, p )
214	if (pressure_exner) then
215	CALL exner_hyb( ip1jmp1, ps, p,alpha,beta, pks, pk, pkf )
216	else
217	CALL exner_milieu( ip1jmp1, ps, p, beta, pks, pk, pkf )
218	endif
219
220	c-----------------------------------------------------------------------
221	c Debut de l'integration temporelle:
222	c ----------------------------------
223
224	1 CONTINUE ! Matsuno Forward step begins here
225
226	jD_cur = jD_ref + day_ini - day_ref + &
227	& itau/day_step
228	jH_cur = jH_ref + start_time + &
229	& mod(itau,day_step)/float(day_step)
230	jD_cur = jD_cur + int(jH_cur)
231	jH_cur = jH_cur - int(jH_cur)
232
233
234	#ifdef CPP_IOIPSL
235	if (ok_guide) then
236	call guide_main(itau,ucov,vcov,teta,q,masse,ps)
237	endif
238	#endif
239
240
241	c
242	c IF( MOD( itau, 10* day_step ).EQ.0 ) THEN
243	c CALL test_period ( ucov,vcov,teta,q,p,phis )
244	c PRINT *,' ---- Test_period apres continue OK ! -----', itau
245	c ENDIF
246	c
247
248	! Save fields obtained at previous time step as '...m1'
249	CALL SCOPY( ijmllm ,vcov , 1, vcovm1 , 1 )
250	CALL SCOPY( ijp1llm,ucov , 1, ucovm1 , 1 )
251	CALL SCOPY( ijp1llm,teta , 1, tetam1 , 1 )
252	CALL SCOPY( ijp1llm,masse, 1, massem1, 1 )
253	CALL SCOPY( ip1jmp1, ps , 1, psm1 , 1 )
254
255	forward = .TRUE.
256	leapf = .FALSE.
257	dt = dtvr
258
259	c ... P.Le Van .26/04/94 ....
260	! Ehouarn: finvmaold is actually not used
261	! CALL SCOPY ( ijp1llm, masse, 1, finvmaold, 1 )
262	! CALL filtreg ( finvmaold ,jjp1, llm, -2,2, .TRUE., 1 )
263
264	2 CONTINUE ! Matsuno backward or leapfrog step begins here
265
266	c-----------------------------------------------------------------------
267
268	c date:
269	c -----
270
271
272	c gestion des appels de la physique et des dissipations:
273	c ------------------------------------------------------
274	c
275	c ... P.Le Van ( 6/02/95 ) ....
276
277	apphys = .FALSE.
278	statcl = .FALSE.
279	conser = .FALSE.
280	apdiss = .FALSE.
281
282	IF( purmats ) THEN
283	! Purely Matsuno time stepping
284	IF( MOD(itau,iconser) .EQ.0.AND. forward ) conser = .TRUE.
285	IF( MOD(itau,dissip_period ).EQ.0.AND..NOT.forward )
286	s apdiss = .TRUE.
287	IF( MOD(itau,iphysiq ).EQ.0.AND..NOT.forward
288	s .and. physic ) apphys = .TRUE.
289	ELSE
290	! Leapfrog/Matsuno time stepping
291	IF( MOD(itau ,iconser) .EQ. 0 ) conser = .TRUE.
292	IF( MOD(itau+1,dissip_period).EQ.0 .AND. .NOT. forward )
293	s apdiss = .TRUE.
294	IF( MOD(itau+1,iphysiq).EQ.0.AND.physic ) apphys=.TRUE.
295	END IF
296
297	! Ehouarn: for Shallow Water case (ie: 1 vertical layer),
298	! supress dissipation step
299	if (llm.eq.1) then
300	apdiss=.false.
301	endif
302
303	c-----------------------------------------------------------------------
304	c calcul des tendances dynamiques:
305	c --------------------------------
306
307	! compute geopotential phi()
308	CALL geopot ( ip1jmp1, teta , pk , pks, phis , phi )
309
310	time = jD_cur + jH_cur
311	CALL caldyn
312	$ ( itau,ucov,vcov,teta,ps,masse,pk,pkf,phis ,
313	$ phi,conser,du,dv,dteta,dp,w, pbaru,pbarv, time )
314
315
316	c-----------------------------------------------------------------------
317	c calcul des tendances advection des traceurs (dont l'humidite)
318	c -------------------------------------------------------------
319
320	IF( forward. OR . leapf ) THEN
321	! Ehouarn: NB: at this point p with ps are not synchronized
322	! (whereas mass and ps are...)
323	CALL caladvtrac(q,pbaru,pbarv,
324	* p, masse, dq, teta,
325	. flxw, pk)
326
327	IF (offline) THEN
328	Cmaf stokage du flux de masse pour traceurs OFF-LINE
329
330	#ifdef CPP_IOIPSL
331	CALL fluxstokenc(pbaru,pbarv,masse,teta,phi,phis,
332	. dtvr, itau)
333	#endif
334
335
336	ENDIF ! of IF (offline)
337	c
338	ENDIF ! of IF( forward. OR . leapf )
339
340
341	c-----------------------------------------------------------------------
342	c integrations dynamique et traceurs:
343	c ----------------------------------
344
345
346	CALL integrd ( 2,vcovm1,ucovm1,tetam1,psm1,massem1 ,
347	$ dv,du,dteta,dq,dp,vcov,ucov,teta,q,ps,masse,phis )
348	! $ finvmaold )
349
350
351	c .P.Le Van (26/04/94 ajout de finvpold dans l'appel d'integrd)
352	c
353	c-----------------------------------------------------------------------
354	c calcul des tendances physiques:
355	c -------------------------------
356	c ######## P.Le Van ( Modif le 6/02/95 ) ###########
357	c
358	IF( purmats ) THEN
359	IF( itau.EQ.itaufin.AND..NOT.forward ) lafin = .TRUE.
360	ELSE
361	IF( itau+1. EQ. itaufin ) lafin = .TRUE.
362	ENDIF
363	c
364	c
365	IF( apphys ) THEN
366	c
367	c ....... Ajout P.Le Van ( 17/04/96 ) ...........
368	c
369
370	CALL pression ( ip1jmp1, ap, bp, ps, p )
371	if (pressure_exner) then
372	CALL exner_hyb( ip1jmp1, ps, p,alpha,beta,pks, pk, pkf )
373	else
374	CALL exner_milieu( ip1jmp1, ps, p, beta, pks, pk, pkf )
375	endif
376
377	! rdaym_ini = itau * dtvr / daysec
378	! rdayvrai = rdaym_ini + day_ini
379	! jD_cur = jD_ref + day_ini - day_ref
380	! $ + int (itau * dtvr / daysec)
381	! jH_cur = jH_ref + &
382	! & (itau * dtvr / daysec - int(itau * dtvr / daysec))
383	jD_cur = jD_ref + day_ini - day_ref + &
384	& itau/day_step
385	jH_cur = jH_ref + start_time + &
386	& mod(itau,day_step)/float(day_step)
387	jD_cur = jD_cur + int(jH_cur)
388	jH_cur = jH_cur - int(jH_cur)
389	! write(lunout,*)'itau, jD_cur = ', itau, jD_cur, jH_cur
390	! call ju2ymds(jD_cur+jH_cur, an, mois, jour, secondes)
391	! write(lunout,*)'current date = ',an, mois, jour, secondes
392
393	c rajout debug
394	c lafin = .true.
395
396
397	c Inbterface avec les routines de phylmd (phymars ... )
398	c -----------------------------------------------------
399
400	c+jld
401
402	c Diagnostique de conservation de l'énergie : initialisation
403	IF (ip_ebil_dyn.ge.1 ) THEN
404	ztit='bil dyn'
405	! Ehouarn: be careful, diagedyn is Earth-specific (includes ../phylmd/..)!
406	IF (planet_type.eq."earth") THEN
407	#ifdef CPP_EARTH
408	CALL diagedyn(ztit,2,1,1,dtphys
409	& , ucov , vcov , ps, p ,pk , teta , q(:,:,1), q(:,:,2))
410	#endif
411	ENDIF
412	ENDIF ! of IF (ip_ebil_dyn.ge.1 )
413	c-jld
414	#ifdef CPP_IOIPSL
415	cIM : pour sortir les param. du modele dans un fis. netcdf 110106
416	IF (first) THEN
417	first=.false.
418	#include "ini_paramLMDZ_dyn.h"
419	ENDIF
420	c
421	#include "write_paramLMDZ_dyn.h"
422	c
423	#endif
424	! #endif of #ifdef CPP_IOIPSL
425	CALL calfis( lafin , jD_cur, jH_cur,
426	$ ucov,vcov,teta,q,masse,ps,p,pk,phis,phi ,
427	$ du,dv,dteta,dq,
428	$ flxw,
429	$ clesphy0, dufi,dvfi,dtetafi,dqfi,dpfi )
430
431	IF (ok_strato) THEN
432	CALL top_bound( vcov,ucov,teta,masse,dufi,dvfi,dtetafi)
433	ENDIF
434
435	c ajout des tendances physiques:
436	c ------------------------------
437	CALL addfi( dtphys, leapf, forward ,
438	$ ucov, vcov, teta , q ,ps ,
439	$ dufi, dvfi, dtetafi , dqfi ,dpfi )
440	c
441	c Diagnostique de conservation de l'énergie : difference
442	IF (ip_ebil_dyn.ge.1 ) THEN
443	ztit='bil phys'
444	IF (planet_type.eq."earth") THEN
445	CALL diagedyn(ztit,2,1,1,dtphys
446	& , ucov , vcov , ps, p ,pk , teta , q(:,:,1), q(:,:,2))
447	ENDIF
448	ENDIF ! of IF (ip_ebil_dyn.ge.1 )
449
450	ENDIF ! of IF( apphys )
451
452	IF(iflag_phys.EQ.2) THEN ! "Newtonian" case
453	! Academic case : Simple friction and Newtonan relaxation
454	! -------------------------------------------------------
455	DO l=1,llm
456	DO ij=1,ip1jmp1
457	teta(ij,l)=teta(ij,l)-dtvr*
458	& (teta(ij,l)-tetarappel(ij,l))(knewt_g+knewt_t(l)clat4(ij))
459	ENDDO
460	ENDDO ! of DO l=1,llm
461
462	if (planet_type.eq."giant") then
463	! add an intrinsic heat flux at the base of the atmosphere
464	teta(:,1)=teta(:,1)+dtvraire(:)ihf/cpp/masse(:,1)
465	endif
466
467	call friction(ucov,vcov,dtvr)
468
469	! Sponge layer (if any)
470	IF (ok_strato) THEN
471	dufi(:,:)=0.
472	dvfi(:,:)=0.
473	dtetafi(:,:)=0.
474	dqfi(:,:,:)=0.
475	dpfi(:)=0.
476	CALL top_bound(vcov,ucov,teta,masse,dufi,dvfi,dtetafi)
477	CALL addfi( dtvr, leapf, forward ,
478	$ ucov, vcov, teta , q ,ps ,
479	$ dufi, dvfi, dtetafi , dqfi ,dpfi )
480	ENDIF ! of IF (ok_strato)
481	ENDIF ! of IF (iflag_phys.EQ.2)
482
483
484	c-jld
485
486	CALL pression ( ip1jmp1, ap, bp, ps, p )
487	if (pressure_exner) then
488	CALL exner_hyb( ip1jmp1, ps, p,alpha,beta, pks, pk, pkf )
489	else
490	CALL exner_milieu( ip1jmp1, ps, p, beta, pks, pk, pkf )
491	endif
492
493
494	c-----------------------------------------------------------------------
495	c dissipation horizontale et verticale des petites echelles:
496	c ----------------------------------------------------------
497
498	IF(apdiss) THEN
499
500
501	c calcul de l'energie cinetique avant dissipation
502	call covcont(llm,ucov,vcov,ucont,vcont)
503	call enercin(vcov,ucov,vcont,ucont,ecin0)
504
505	c dissipation
506	CALL dissip(vcov,ucov,teta,p,dvdis,dudis,dtetadis)
507	ucov=ucov+dudis
508	vcov=vcov+dvdis
509	c teta=teta+dtetadis
510
511
512	c------------------------------------------------------------------------
513	if (dissip_conservative) then
514	C On rajoute la tendance due a la transform. Ec -> E therm. cree
515	C lors de la dissipation
516	call covcont(llm,ucov,vcov,ucont,vcont)
517	call enercin(vcov,ucov,vcont,ucont,ecin)
518	dtetaecdt= (ecin0-ecin)/ pk
519	c teta=teta+dtetaecdt
520	dtetadis=dtetadis+dtetaecdt
521	endif
522	teta=teta+dtetadis
523	c------------------------------------------------------------------------
524
525
526	c ....... P. Le Van ( ajout le 17/04/96 ) ...........
527	c ... Calcul de la valeur moyenne, unique de h aux poles .....
528	c
529
530	DO l = 1, llm
531	DO ij = 1,iim
532	tppn(ij) = aire( ij ) * teta( ij ,l)
533	tpps(ij) = aire(ij+ip1jm) * teta(ij+ip1jm,l)
534	ENDDO
535	tpn = SSUM(iim,tppn,1)/apoln
536	tps = SSUM(iim,tpps,1)/apols
537
538	DO ij = 1, iip1
539	teta( ij ,l) = tpn
540	teta(ij+ip1jm,l) = tps
541	ENDDO
542	ENDDO
543
544	if (1 == 0) then
545	!!! Ehouarn: lines here 1) kill 1+1=2 in the dynamics
546	!!! 2) should probably not be here anyway
547	!!! but are kept for those who would want to revert to previous behaviour
548	DO ij = 1,iim
549	tppn(ij) = aire( ij ) * ps ( ij )
550	tpps(ij) = aire(ij+ip1jm) * ps (ij+ip1jm)
551	ENDDO
552	tpn = SSUM(iim,tppn,1)/apoln
553	tps = SSUM(iim,tpps,1)/apols
554
555	DO ij = 1, iip1
556	ps( ij ) = tpn
557	ps(ij+ip1jm) = tps
558	ENDDO
559	endif ! of if (1 == 0)
560
561	END IF ! of IF(apdiss)
562
563	c ajout debug
564	c IF( lafin ) then
565	c abort_message = 'Simulation finished'
566	c call abort_gcm(modname,abort_message,0)
567	c ENDIF
568
569	c ********************************************************************
570	c ********************************************************************
571	c .... fin de l'integration dynamique et physique pour le pas itau ..
572	c ********************************************************************
573	c ********************************************************************
574
575	c preparation du pas d'integration suivant ......
576
577	IF ( .NOT.purmats ) THEN
578	c ........................................................
579	c .............. schema matsuno + leapfrog ..............
580	c ........................................................
581
582	IF(forward. OR. leapf) THEN
583	itau= itau + 1
584	c iday= day_ini+itau/day_step
585	c time= REAL(itau-(iday-day_ini)*day_step)/day_step+time_0
586	c IF(time.GT.1.) THEN
587	c time = time-1.
588	c iday = iday+1
589	c ENDIF
590	ENDIF
591
592
593	IF( itau. EQ. itaufinp1 ) then
594	if (flag_verif) then
595	write(79,*) 'ucov',ucov
596	write(80,*) 'vcov',vcov
597	write(81,*) 'teta',teta
598	write(82,*) 'ps',ps
599	write(83,*) 'q',q
600	WRITE(85,*) 'q1 = ',q(:,:,1)
601	WRITE(86,*) 'q3 = ',q(:,:,3)
602	endif
603
604	abort_message = 'Simulation finished'
605
606	call abort_gcm(modname,abort_message,0)
607	ENDIF
608	c-----------------------------------------------------------------------
609	c ecriture du fichier histoire moyenne:
610	c -------------------------------------
611
612	IF(MOD(itau,iperiod).EQ.0 .OR. itau.EQ.itaufin) THEN
613	IF(itau.EQ.itaufin) THEN
614	iav=1
615	ELSE
616	iav=0
617	ENDIF
618
619	IF (ok_dynzon) THEN
620	#ifdef CPP_IOIPSL
621	CALL bilan_dyn(2,dtvriperiod,dtvrday_step*periodav,
622	& ps,masse,pk,pbaru,pbarv,teta,phi,ucov,vcov,q)
623	#endif
624	END IF
625	IF (ok_dyn_ave) THEN
626	#ifdef CPP_IOIPSL
627	CALL writedynav(itau,vcov,
628	& ucov,teta,pk,phi,q,masse,ps,phis)
629	#endif
630	ENDIF
631
632	ENDIF ! of IF((MOD(itau,iperiod).EQ.0).OR.(itau.EQ.itaufin))
633
634	c-----------------------------------------------------------------------
635	c ecriture de la bande histoire:
636	c ------------------------------
637
638	IF( MOD(itau,iecri).EQ.0) THEN
639	! Ehouarn: output only during LF or Backward Matsuno
640	if (leapf.or.(.not.leapf.and.(.not.forward))) then
641	CALL geopot(ip1jmp1,teta,pk,pks,phis,phi)
642	unat=0.
643	do l=1,llm
644	unat(iip2:ip1jm,l)=ucov(iip2:ip1jm,l)/cu(iip2:ip1jm)
645	vnat(:,l)=vcov(:,l)/cv(:)
646	enddo
647	#ifdef CPP_IOIPSL
648	if (ok_dyn_ins) then
649	! write(lunout,*) "leapfrog: call writehist, itau=",itau
650	CALL writehist(itau,vcov,ucov,teta,phi,q,masse,ps,phis)
651	! call WriteField('ucov',reshape(ucov,(/iip1,jmp1,llm/)))
652	! call WriteField('vcov',reshape(vcov,(/iip1,jjm,llm/)))
653	! call WriteField('teta',reshape(teta,(/iip1,jmp1,llm/)))
654	! call WriteField('ps',reshape(ps,(/iip1,jmp1/)))
655	! call WriteField('masse',reshape(masse,(/iip1,jmp1,llm/)))
656	endif ! of if (ok_dyn_ins)
657	#endif
658	! For some Grads outputs of fields
659	if (output_grads_dyn) then
660	#include "write_grads_dyn.h"
661	endif
662	endif ! of if (leapf.or.(.not.leapf.and.(.not.forward)))
663	ENDIF ! of IF(MOD(itau,iecri).EQ.0)
664
665	IF(itau.EQ.itaufin) THEN
666
667
668	! if (planet_type.eq."earth") then
669	! Write an Earth-format restart file
670	CALL dynredem1("restart.nc",start_time,
671	& vcov,ucov,teta,q,masse,ps)
672	! endif ! of if (planet_type.eq."earth")
673
674	CLOSE(99)
675	!!! Ehouarn: Why not stop here and now?
676	ENDIF ! of IF (itau.EQ.itaufin)
677
678	c-----------------------------------------------------------------------
679	c gestion de l'integration temporelle:
680	c ------------------------------------
681
682	IF( MOD(itau,iperiod).EQ.0 ) THEN
683	GO TO 1
684	ELSE IF ( MOD(itau-1,iperiod). EQ. 0 ) THEN
685
686	IF( forward ) THEN
687	c fin du pas forward et debut du pas backward
688
689	forward = .FALSE.
690	leapf = .FALSE.
691	GO TO 2
692
693	ELSE
694	c fin du pas backward et debut du premier pas leapfrog
695
696	leapf = .TRUE.
697	dt = 2.*dtvr
698	GO TO 2
699	END IF ! of IF (forward)
700	ELSE
701
702	c ...... pas leapfrog .....
703
704	leapf = .TRUE.
705	dt = 2.*dtvr
706	GO TO 2
707	END IF ! of IF (MOD(itau,iperiod).EQ.0)
708	! ELSEIF (MOD(itau-1,iperiod).EQ.0)
709
710	ELSE ! of IF (.not.purmats)
711
712	c ........................................................
713	c .............. schema matsuno ...............
714	c ........................................................
715	IF( forward ) THEN
716
717	itau = itau + 1
718	c iday = day_ini+itau/day_step
719	c time = REAL(itau-(iday-day_ini)*day_step)/day_step+time_0
720	c
721	c IF(time.GT.1.) THEN
722	c time = time-1.
723	c iday = iday+1
724	c ENDIF
725
726	forward = .FALSE.
727	IF( itau. EQ. itaufinp1 ) then
728	abort_message = 'Simulation finished'
729	call abort_gcm(modname,abort_message,0)
730	ENDIF
731	GO TO 2
732
733	ELSE ! of IF(forward) i.e. backward step
734
735	IF(MOD(itau,iperiod).EQ.0 .OR. itau.EQ.itaufin) THEN
736	IF(itau.EQ.itaufin) THEN
737	iav=1
738	ELSE
739	iav=0
740	ENDIF
741
742	IF (ok_dynzon) THEN
743	#ifdef CPP_IOIPSL
744	CALL bilan_dyn(2,dtvriperiod,dtvrday_step*periodav,
745	& ps,masse,pk,pbaru,pbarv,teta,phi,ucov,vcov,q)
746	#endif
747	ENDIF
748	IF (ok_dyn_ave) THEN
749	#ifdef CPP_IOIPSL
750	CALL writedynav(itau,vcov,
751	& ucov,teta,pk,phi,q,masse,ps,phis)
752	#endif
753	ENDIF
754
755	ENDIF ! of IF(MOD(itau,iperiod).EQ.0 .OR. itau.EQ.itaufin)
756
757	IF(MOD(itau,iecri ).EQ.0) THEN
758	c IF(MOD(itau,iecri*day_step).EQ.0) THEN
759	CALL geopot(ip1jmp1,teta,pk,pks,phis,phi)
760	unat=0.
761	do l=1,llm
762	unat(iip2:ip1jm,l)=ucov(iip2:ip1jm,l)/cu(iip2:ip1jm)
763	vnat(:,l)=vcov(:,l)/cv(:)
764	enddo
765	#ifdef CPP_IOIPSL
766	if (ok_dyn_ins) then
767	! write(lunout,*) "leapfrog: call writehist (b)",
768	! & itau,iecri
769	CALL writehist(itau,vcov,ucov,teta,phi,q,masse,ps,phis)
770	endif ! of if (ok_dyn_ins)
771	#endif
772	! For some Grads outputs
773	if (output_grads_dyn) then
774	#include "write_grads_dyn.h"
775	endif
776
777	ENDIF ! of IF(MOD(itau,iecri ).EQ.0)
778
779	IF(itau.EQ.itaufin) THEN
780	! if (planet_type.eq."earth") then
781	CALL dynredem1("restart.nc",start_time,
782	& vcov,ucov,teta,q,masse,ps)
783	! endif ! of if (planet_type.eq."earth")
784	ENDIF ! of IF(itau.EQ.itaufin)
785
786	forward = .TRUE.
787	GO TO 1
788
789	ENDIF ! of IF (forward)
790
791	END IF ! of IF(.not.purmats)
792
793	STOP
794	END

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