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leapfrog.F @ 1614

Last change on this file since 1614 was 1614, checked in by Ehouarn Millour, 12 years ago
Correction to enforce having 1+1=2 in the dynamics. Still not sure why changing surface pressure during dissipation step leads to having 1+1!=2. But clearly there is no reason to recompute polar surface pressure during a dissipation step. EM
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1	!
2	! $Id: leapfrog.F 1614 2012-02-03 10:07:08Z emillour $
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 , finvmaold(ip1jmp1,llm)
120
121	cym LOGICAL lafin
122	LOGICAL :: lafin=.false.
123	INTEGER ij,iq,l
124	INTEGER ik
125
126	real time_step, t_wrt, t_ops
127
128	! REAL rdayvrai,rdaym_ini
129	! jD_cur: jour julien courant
130	! jH_cur: heure julienne courante
131	REAL :: jD_cur, jH_cur
132	INTEGER :: an, mois, jour
133	REAL :: secondes
134
135	LOGICAL first,callinigrads
136	cIM : pour sortir les param. du modele dans un fis. netcdf 110106
137	save first
138	data first/.true./
139	real dt_cum
140	character*10 infile
141	integer zan, tau0, thoriid
142	integer nid_ctesGCM
143	save nid_ctesGCM
144	real degres
145	real rlong(iip1), rlatg(jjp1)
146	real zx_tmp_2d(iip1,jjp1)
147	integer ndex2d(iip1*jjp1)
148	logical ok_sync
149	parameter (ok_sync = .true.)
150	logical physic
151
152	data callinigrads/.true./
153	character*10 string10
154
155	REAL alpha(ip1jmp1,llm),beta(ip1jmp1,llm)
156	REAL :: flxw(ip1jmp1,llm) ! flux de masse verticale
157
158	c+jld variables test conservation energie
159	REAL ecin(ip1jmp1,llm),ecin0(ip1jmp1,llm)
160	C Tendance de la temp. potentiel d (theta)/ d t due a la
161	C tansformation d'energie cinetique en energie thermique
162	C cree par la dissipation
163	REAL dtetaecdt(ip1jmp1,llm)
164	REAL vcont(ip1jm,llm),ucont(ip1jmp1,llm)
165	REAL vnat(ip1jm,llm),unat(ip1jmp1,llm)
166	REAL d_h_vcol, d_qt, d_qw, d_ql, d_ec
167	CHARACTER*15 ztit
168	!IM INTEGER ip_ebil_dyn ! PRINT level for energy conserv. diag.
169	!IM SAVE ip_ebil_dyn
170	!IM DATA ip_ebil_dyn/0/
171	c-jld
172
173	character*80 dynhist_file, dynhistave_file
174	character(len=*),parameter :: modname="leapfrog"
175	character*80 abort_message
176
177	logical dissip_conservative
178	save dissip_conservative
179	data dissip_conservative/.true./
180
181	LOGICAL prem
182	save prem
183	DATA prem/.true./
184	INTEGER testita
185	PARAMETER (testita = 9)
186
187	logical , parameter :: flag_verif = .false.
188
189
190	integer itau_w ! pas de temps ecriture = itap + itau_phy
191
192
193	itaufin = nday*day_step
194	itaufinp1 = itaufin +1
195	itau = 0
196	physic=.true.
197	if (iflag_phys==0.or.iflag_phys==2) physic=.false.
198
199	c iday = day_ini+itau/day_step
200	c time = REAL(itau-(iday-day_ini)*day_step)/day_step+time_0
201	c IF(time.GT.1.) THEN
202	c time = time-1.
203	c iday = iday+1
204	c ENDIF
205
206
207	c-----------------------------------------------------------------------
208	c On initialise la pression et la fonction d'Exner :
209	c --------------------------------------------------
210
211	dq(:,:,:)=0.
212	CALL pression ( ip1jmp1, ap, bp, ps, p )
213	if (disvert_type==1) then
214	CALL exner_hyb( ip1jmp1, ps, p,alpha,beta, pks, pk, pkf )
215	else ! we assume that we are in the disvert_type==2 case
216	CALL exner_milieu( ip1jmp1, ps, p, beta, pks, pk, pkf )
217	endif
218
219	c-----------------------------------------------------------------------
220	c Debut de l'integration temporelle:
221	c ----------------------------------
222
223	1 CONTINUE ! Matsuno Forward step begins here
224
225	jD_cur = jD_ref + day_ini - day_ref + &
226	& int (itau * dtvr / daysec)
227	jH_cur = jH_ref + start_time + &
228	& (itau * dtvr / daysec - int(itau * dtvr / daysec))
229	jD_cur = jD_cur + int(jH_cur)
230	jH_cur = jH_cur - int(jH_cur)
231
232
233	#ifdef CPP_IOIPSL
234	if (ok_guide) then
235	call guide_main(itau,ucov,vcov,teta,q,masse,ps)
236	endif
237	#endif
238
239
240	c
241	c IF( MOD( itau, 10* day_step ).EQ.0 ) THEN
242	c CALL test_period ( ucov,vcov,teta,q,p,phis )
243	c PRINT *,' ---- Test_period apres continue OK ! -----', itau
244	c ENDIF
245	c
246
247	! Save fields obtained at previous time step as '...m1'
248	CALL SCOPY( ijmllm ,vcov , 1, vcovm1 , 1 )
249	CALL SCOPY( ijp1llm,ucov , 1, ucovm1 , 1 )
250	CALL SCOPY( ijp1llm,teta , 1, tetam1 , 1 )
251	CALL SCOPY( ijp1llm,masse, 1, massem1, 1 )
252	CALL SCOPY( ip1jmp1, ps , 1, psm1 , 1 )
253
254	forward = .TRUE.
255	leapf = .FALSE.
256	dt = dtvr
257
258	c ... P.Le Van .26/04/94 ....
259
260	CALL SCOPY ( ijp1llm, masse, 1, finvmaold, 1 )
261	CALL filtreg ( finvmaold ,jjp1, llm, -2,2, .TRUE., 1 )
262
263	2 CONTINUE ! Matsuno backward or leapfrog step begins here
264
265	c-----------------------------------------------------------------------
266
267	c date:
268	c -----
269
270
271	c gestion des appels de la physique et des dissipations:
272	c ------------------------------------------------------
273	c
274	c ... P.Le Van ( 6/02/95 ) ....
275
276	apphys = .FALSE.
277	statcl = .FALSE.
278	conser = .FALSE.
279	apdiss = .FALSE.
280
281	IF( purmats ) THEN
282	! Purely Matsuno time stepping
283	IF( MOD(itau,iconser) .EQ.0.AND. forward ) conser = .TRUE.
284	IF( MOD(itau,dissip_period ).EQ.0.AND..NOT.forward )
285	s apdiss = .TRUE.
286	IF( MOD(itau,iphysiq ).EQ.0.AND..NOT.forward
287	s .and. physic ) apphys = .TRUE.
288	ELSE
289	! Leapfrog/Matsuno time stepping
290	IF( MOD(itau ,iconser) .EQ. 0 ) conser = .TRUE.
291	IF( MOD(itau+1,dissip_period).EQ.0 .AND. .NOT. forward )
292	s apdiss = .TRUE.
293	IF( MOD(itau+1,iphysiq).EQ.0.AND.physic ) apphys=.TRUE.
294	END IF
295
296	! Ehouarn: for Shallow Water case (ie: 1 vertical layer),
297	! supress dissipation step
298	if (llm.eq.1) then
299	apdiss=.false.
300	endif
301
302	c-----------------------------------------------------------------------
303	c calcul des tendances dynamiques:
304	c --------------------------------
305
306	! compute geopotential phi()
307	CALL geopot ( ip1jmp1, teta , pk , pks, phis , phi )
308
309	time = jD_cur + jH_cur
310	CALL caldyn
311	$ ( itau,ucov,vcov,teta,ps,masse,pk,pkf,phis ,
312	$ phi,conser,du,dv,dteta,dp,w, pbaru,pbarv, time )
313
314
315	c-----------------------------------------------------------------------
316	c calcul des tendances advection des traceurs (dont l'humidite)
317	c -------------------------------------------------------------
318
319	IF( forward. OR . leapf ) THEN
320
321	CALL caladvtrac(q,pbaru,pbarv,
322	* p, masse, dq, teta,
323	. flxw, pk)
324
325	IF (offline) THEN
326	Cmaf stokage du flux de masse pour traceurs OFF-LINE
327
328	#ifdef CPP_IOIPSL
329	CALL fluxstokenc(pbaru,pbarv,masse,teta,phi,phis,
330	. dtvr, itau)
331	#endif
332
333
334	ENDIF ! of IF (offline)
335	c
336	ENDIF ! of IF( forward. OR . leapf )
337
338
339	c-----------------------------------------------------------------------
340	c integrations dynamique et traceurs:
341	c ----------------------------------
342
343
344	CALL integrd ( 2,vcovm1,ucovm1,tetam1,psm1,massem1 ,
345	$ dv,du,dteta,dq,dp,vcov,ucov,teta,q,ps,masse,phis ,
346	$ finvmaold )
347
348
349	c .P.Le Van (26/04/94 ajout de finvpold dans l'appel d'integrd)
350	c
351	c-----------------------------------------------------------------------
352	c calcul des tendances physiques:
353	c -------------------------------
354	c ######## P.Le Van ( Modif le 6/02/95 ) ###########
355	c
356	IF( purmats ) THEN
357	IF( itau.EQ.itaufin.AND..NOT.forward ) lafin = .TRUE.
358	ELSE
359	IF( itau+1. EQ. itaufin ) lafin = .TRUE.
360	ENDIF
361	c
362	c
363	IF( apphys ) THEN
364	c
365	c ....... Ajout P.Le Van ( 17/04/96 ) ...........
366	c
367
368	CALL pression ( ip1jmp1, ap, bp, ps, p )
369	if (disvert_type==1) then
370	CALL exner_hyb( ip1jmp1, ps, p,alpha,beta,pks, pk, pkf )
371	else ! we assume that we are in the disvert_type==2 case
372	CALL exner_milieu( ip1jmp1, ps, p, beta, pks, pk, pkf )
373	endif
374
375	! rdaym_ini = itau * dtvr / daysec
376	! rdayvrai = rdaym_ini + day_ini
377	! jD_cur = jD_ref + day_ini - day_ref
378	! $ + int (itau * dtvr / daysec)
379	! jH_cur = jH_ref + &
380	! & (itau * dtvr / daysec - int(itau * dtvr / daysec))
381	jD_cur = jD_ref + day_ini - day_ref + &
382	& int (itau * dtvr / daysec)
383	jH_cur = jH_ref + start_time + &
384	& (itau * dtvr / daysec - int(itau * dtvr / daysec))
385	jD_cur = jD_cur + int(jH_cur)
386	jH_cur = jH_cur - int(jH_cur)
387	! write(lunout,*)'itau, jD_cur = ', itau, jD_cur, jH_cur
388	! call ju2ymds(jD_cur+jH_cur, an, mois, jour, secondes)
389	! write(lunout,*)'current date = ',an, mois, jour, secondes
390
391	c rajout debug
392	c lafin = .true.
393
394
395	c Inbterface avec les routines de phylmd (phymars ... )
396	c -----------------------------------------------------
397
398	c+jld
399
400	c Diagnostique de conservation de l'énergie : initialisation
401	IF (ip_ebil_dyn.ge.1 ) THEN
402	ztit='bil dyn'
403	! Ehouarn: be careful, diagedyn is Earth-specific (includes ../phylmd/..)!
404	IF (planet_type.eq."earth") THEN
405	CALL diagedyn(ztit,2,1,1,dtphys
406	& , ucov , vcov , ps, p ,pk , teta , q(:,:,1), q(:,:,2))
407	ENDIF
408	ENDIF ! of IF (ip_ebil_dyn.ge.1 )
409	c-jld
410	#ifdef CPP_IOIPSL
411	cIM : pour sortir les param. du modele dans un fis. netcdf 110106
412	IF (first) THEN
413	first=.false.
414	#include "ini_paramLMDZ_dyn.h"
415	ENDIF
416	c
417	#include "write_paramLMDZ_dyn.h"
418	c
419	#endif
420	! #endif of #ifdef CPP_IOIPSL
421	CALL calfis( lafin , jD_cur, jH_cur,
422	$ ucov,vcov,teta,q,masse,ps,p,pk,phis,phi ,
423	$ du,dv,dteta,dq,
424	$ flxw,
425	$ clesphy0, dufi,dvfi,dtetafi,dqfi,dpfi )
426
427	IF (ok_strato) THEN
428	CALL top_bound( vcov,ucov,teta,masse,dufi,dvfi,dtetafi)
429	ENDIF
430
431	c ajout des tendances physiques:
432	c ------------------------------
433	CALL addfi( dtphys, leapf, forward ,
434	$ ucov, vcov, teta , q ,ps ,
435	$ dufi, dvfi, dtetafi , dqfi ,dpfi )
436	c
437	c Diagnostique de conservation de l'énergie : difference
438	IF (ip_ebil_dyn.ge.1 ) THEN
439	ztit='bil phys'
440	IF (planet_type.eq."earth") THEN
441	CALL diagedyn(ztit,2,1,1,dtphys
442	& , ucov , vcov , ps, p ,pk , teta , q(:,:,1), q(:,:,2))
443	ENDIF
444	ENDIF ! of IF (ip_ebil_dyn.ge.1 )
445
446	ENDIF ! of IF( apphys )
447
448	IF(iflag_phys.EQ.2) THEN ! "Newtonian" case
449	! Academic case : Simple friction and Newtonan relaxation
450	! -------------------------------------------------------
451	DO l=1,llm
452	DO ij=1,ip1jmp1
453	teta(ij,l)=teta(ij,l)-dtvr*
454	& (teta(ij,l)-tetarappel(ij,l))(knewt_g+knewt_t(l)clat4(ij))
455	ENDDO
456	ENDDO ! of DO l=1,llm
457
458	if (planet_type.eq."giant") then
459	! add an intrinsic heat flux at the base of the atmosphere
460	teta(:,1)=teta(:,1)+dtvraire(:)ihf/cpp/masse(:,1)
461	endif
462
463	call friction(ucov,vcov,dtvr)
464
465	! Sponge layer (if any)
466	IF (ok_strato) THEN
467	dufi(:,:)=0.
468	dvfi(:,:)=0.
469	dtetafi(:,:)=0.
470	dqfi(:,:,:)=0.
471	dpfi(:)=0.
472	CALL top_bound(vcov,ucov,teta,masse,dufi,dvfi,dtetafi)
473	CALL addfi( dtvr, leapf, forward ,
474	$ ucov, vcov, teta , q ,ps ,
475	$ dufi, dvfi, dtetafi , dqfi ,dpfi )
476	ENDIF ! of IF (ok_strato)
477	ENDIF ! of IF (iflag_phys.EQ.2)
478
479
480	c-jld
481
482	CALL pression ( ip1jmp1, ap, bp, ps, p )
483	if (disvert_type==1) then
484	CALL exner_hyb( ip1jmp1, ps, p,alpha,beta, pks, pk, pkf )
485	else ! we assume that we are in the disvert_type==2 case
486	CALL exner_milieu( ip1jmp1, ps, p, beta, pks, pk, pkf )
487	endif
488
489
490	c-----------------------------------------------------------------------
491	c dissipation horizontale et verticale des petites echelles:
492	c ----------------------------------------------------------
493
494	IF(apdiss) THEN
495
496
497	c calcul de l'energie cinetique avant dissipation
498	call covcont(llm,ucov,vcov,ucont,vcont)
499	call enercin(vcov,ucov,vcont,ucont,ecin0)
500
501	c dissipation
502	CALL dissip(vcov,ucov,teta,p,dvdis,dudis,dtetadis)
503	ucov=ucov+dudis
504	vcov=vcov+dvdis
505	c teta=teta+dtetadis
506
507
508	c------------------------------------------------------------------------
509	if (dissip_conservative) then
510	C On rajoute la tendance due a la transform. Ec -> E therm. cree
511	C lors de la dissipation
512	call covcont(llm,ucov,vcov,ucont,vcont)
513	call enercin(vcov,ucov,vcont,ucont,ecin)
514	dtetaecdt= (ecin0-ecin)/ pk
515	c teta=teta+dtetaecdt
516	dtetadis=dtetadis+dtetaecdt
517	endif
518	teta=teta+dtetadis
519	c------------------------------------------------------------------------
520
521
522	c ....... P. Le Van ( ajout le 17/04/96 ) ...........
523	c ... Calcul de la valeur moyenne, unique de h aux poles .....
524	c
525
526	DO l = 1, llm
527	DO ij = 1,iim
528	tppn(ij) = aire( ij ) * teta( ij ,l)
529	tpps(ij) = aire(ij+ip1jm) * teta(ij+ip1jm,l)
530	ENDDO
531	tpn = SSUM(iim,tppn,1)/apoln
532	tps = SSUM(iim,tpps,1)/apols
533
534	DO ij = 1, iip1
535	teta( ij ,l) = tpn
536	teta(ij+ip1jm,l) = tps
537	ENDDO
538	ENDDO
539
540	if (1 == 0) then
541	!!! Ehouarn: lines here 1) kill 1+1=2 in the dynamics
542	!!! 2) should probably not be here anyway
543	!!! but are kept for those who would want to revert to previous behaviour
544	DO ij = 1,iim
545	tppn(ij) = aire( ij ) * ps ( ij )
546	tpps(ij) = aire(ij+ip1jm) * ps (ij+ip1jm)
547	ENDDO
548	tpn = SSUM(iim,tppn,1)/apoln
549	tps = SSUM(iim,tpps,1)/apols
550
551	DO ij = 1, iip1
552	ps( ij ) = tpn
553	ps(ij+ip1jm) = tps
554	ENDDO
555	endif ! of if (1 == 0)
556
557	END IF ! of IF(apdiss)
558
559	c ajout debug
560	c IF( lafin ) then
561	c abort_message = 'Simulation finished'
562	c call abort_gcm(modname,abort_message,0)
563	c ENDIF
564
565	c ********************************************************************
566	c ********************************************************************
567	c .... fin de l'integration dynamique et physique pour le pas itau ..
568	c ********************************************************************
569	c ********************************************************************
570
571	c preparation du pas d'integration suivant ......
572
573	IF ( .NOT.purmats ) THEN
574	c ........................................................
575	c .............. schema matsuno + leapfrog ..............
576	c ........................................................
577
578	IF(forward. OR. leapf) THEN
579	itau= itau + 1
580	c iday= day_ini+itau/day_step
581	c time= REAL(itau-(iday-day_ini)*day_step)/day_step+time_0
582	c IF(time.GT.1.) THEN
583	c time = time-1.
584	c iday = iday+1
585	c ENDIF
586	ENDIF
587
588
589	IF( itau. EQ. itaufinp1 ) then
590	if (flag_verif) then
591	write(79,*) 'ucov',ucov
592	write(80,*) 'vcov',vcov
593	write(81,*) 'teta',teta
594	write(82,*) 'ps',ps
595	write(83,*) 'q',q
596	WRITE(85,*) 'q1 = ',q(:,:,1)
597	WRITE(86,*) 'q3 = ',q(:,:,3)
598	endif
599
600	abort_message = 'Simulation finished'
601
602	call abort_gcm(modname,abort_message,0)
603	ENDIF
604	c-----------------------------------------------------------------------
605	c ecriture du fichier histoire moyenne:
606	c -------------------------------------
607
608	IF(MOD(itau,iperiod).EQ.0 .OR. itau.EQ.itaufin) THEN
609	IF(itau.EQ.itaufin) THEN
610	iav=1
611	ELSE
612	iav=0
613	ENDIF
614
615	IF (ok_dynzon) THEN
616	#ifdef CPP_IOIPSL
617	CALL bilan_dyn(2,dtvriperiod,dtvrday_step*periodav,
618	& ps,masse,pk,pbaru,pbarv,teta,phi,ucov,vcov,q)
619	#endif
620	END IF
621	IF (ok_dyn_ave) THEN
622	#ifdef CPP_IOIPSL
623	CALL writedynav(itau,vcov,
624	& ucov,teta,pk,phi,q,masse,ps,phis)
625	#endif
626	ENDIF
627
628	ENDIF ! of IF((MOD(itau,iperiod).EQ.0).OR.(itau.EQ.itaufin))
629
630	c-----------------------------------------------------------------------
631	c ecriture de la bande histoire:
632	c ------------------------------
633
634	IF( MOD(itau,iecri).EQ.0) THEN
635	! Ehouarn: output only during LF or Backward Matsuno
636	if (leapf.or.(.not.leapf.and.(.not.forward))) then
637	CALL geopot(ip1jmp1,teta,pk,pks,phis,phi)
638	unat=0.
639	do l=1,llm
640	unat(iip2:ip1jm,l)=ucov(iip2:ip1jm,l)/cu(iip2:ip1jm)
641	vnat(:,l)=vcov(:,l)/cv(:)
642	enddo
643	#ifdef CPP_IOIPSL
644	if (ok_dyn_ins) then
645	! write(lunout,*) "leapfrog: call writehist, itau=",itau
646	CALL writehist(itau,vcov,ucov,teta,phi,q,masse,ps,phis)
647	! call WriteField('ucov',reshape(ucov,(/iip1,jmp1,llm/)))
648	! call WriteField('vcov',reshape(vcov,(/iip1,jjm,llm/)))
649	! call WriteField('teta',reshape(teta,(/iip1,jmp1,llm/)))
650	! call WriteField('ps',reshape(ps,(/iip1,jmp1/)))
651	! call WriteField('masse',reshape(masse,(/iip1,jmp1,llm/)))
652	endif ! of if (ok_dyn_ins)
653	#endif
654	! For some Grads outputs of fields
655	if (output_grads_dyn) then
656	#include "write_grads_dyn.h"
657	endif
658	endif ! of if (leapf.or.(.not.leapf.and.(.not.forward)))
659	ENDIF ! of IF(MOD(itau,iecri).EQ.0)
660
661	IF(itau.EQ.itaufin) THEN
662
663
664	! if (planet_type.eq."earth") then
665	! Write an Earth-format restart file
666	CALL dynredem1("restart.nc",start_time,
667	& vcov,ucov,teta,q,masse,ps)
668	! endif ! of if (planet_type.eq."earth")
669
670	CLOSE(99)
671	!!! Ehouarn: Why not stop here and now?
672	ENDIF ! of IF (itau.EQ.itaufin)
673
674	c-----------------------------------------------------------------------
675	c gestion de l'integration temporelle:
676	c ------------------------------------
677
678	IF( MOD(itau,iperiod).EQ.0 ) THEN
679	GO TO 1
680	ELSE IF ( MOD(itau-1,iperiod). EQ. 0 ) THEN
681
682	IF( forward ) THEN
683	c fin du pas forward et debut du pas backward
684
685	forward = .FALSE.
686	leapf = .FALSE.
687	GO TO 2
688
689	ELSE
690	c fin du pas backward et debut du premier pas leapfrog
691
692	leapf = .TRUE.
693	dt = 2.*dtvr
694	GO TO 2
695	END IF ! of IF (forward)
696	ELSE
697
698	c ...... pas leapfrog .....
699
700	leapf = .TRUE.
701	dt = 2.*dtvr
702	GO TO 2
703	END IF ! of IF (MOD(itau,iperiod).EQ.0)
704	! ELSEIF (MOD(itau-1,iperiod).EQ.0)
705
706	ELSE ! of IF (.not.purmats)
707
708	c ........................................................
709	c .............. schema matsuno ...............
710	c ........................................................
711	IF( forward ) THEN
712
713	itau = itau + 1
714	c iday = day_ini+itau/day_step
715	c time = REAL(itau-(iday-day_ini)*day_step)/day_step+time_0
716	c
717	c IF(time.GT.1.) THEN
718	c time = time-1.
719	c iday = iday+1
720	c ENDIF
721
722	forward = .FALSE.
723	IF( itau. EQ. itaufinp1 ) then
724	abort_message = 'Simulation finished'
725	call abort_gcm(modname,abort_message,0)
726	ENDIF
727	GO TO 2
728
729	ELSE ! of IF(forward) i.e. backward step
730
731	IF(MOD(itau,iperiod).EQ.0 .OR. itau.EQ.itaufin) THEN
732	IF(itau.EQ.itaufin) THEN
733	iav=1
734	ELSE
735	iav=0
736	ENDIF
737
738	IF (ok_dynzon) THEN
739	#ifdef CPP_IOIPSL
740	CALL bilan_dyn(2,dtvriperiod,dtvrday_step*periodav,
741	& ps,masse,pk,pbaru,pbarv,teta,phi,ucov,vcov,q)
742	#endif
743	ENDIF
744	IF (ok_dyn_ave) THEN
745	#ifdef CPP_IOIPSL
746	CALL writedynav(itau,vcov,
747	& ucov,teta,pk,phi,q,masse,ps,phis)
748	#endif
749	ENDIF
750
751	ENDIF ! of IF(MOD(itau,iperiod).EQ.0 .OR. itau.EQ.itaufin)
752
753	IF(MOD(itau,iecri ).EQ.0) THEN
754	c IF(MOD(itau,iecri*day_step).EQ.0) THEN
755	CALL geopot(ip1jmp1,teta,pk,pks,phis,phi)
756	unat=0.
757	do l=1,llm
758	unat(iip2:ip1jm,l)=ucov(iip2:ip1jm,l)/cu(iip2:ip1jm)
759	vnat(:,l)=vcov(:,l)/cv(:)
760	enddo
761	#ifdef CPP_IOIPSL
762	if (ok_dyn_ins) then
763	! write(lunout,*) "leapfrog: call writehist (b)",
764	! & itau,iecri
765	CALL writehist(itau,vcov,ucov,teta,phi,q,masse,ps,phis)
766	endif ! of if (ok_dyn_ins)
767	#endif
768	! For some Grads outputs
769	if (output_grads_dyn) then
770	#include "write_grads_dyn.h"
771	endif
772
773	ENDIF ! of IF(MOD(itau,iecri ).EQ.0)
774
775	IF(itau.EQ.itaufin) THEN
776	! if (planet_type.eq."earth") then
777	CALL dynredem1("restart.nc",start_time,
778	& vcov,ucov,teta,q,masse,ps)
779	! endif ! of if (planet_type.eq."earth")
780	ENDIF ! of IF(itau.EQ.itaufin)
781
782	forward = .TRUE.
783	GO TO 1
784
785	ENDIF ! of IF (forward)
786
787	END IF ! of IF(.not.purmats)
788
789	STOP
790	END

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