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surf_land_orchidee_mod.F90 @ 812

Last change on this file since 812 was 812, checked in by Laurent Fairhead, 17 years ago
gestion des deux interfaces sequentielle/parallele d'ORCHIDEE LF
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File size: 23.3 KB

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1	!
2	! $Header$
3	!
4	MODULE surf_land_orchidee_mod
5	!
6	! This module controles the interface towards the model ORCHIDEE
7	!
8	! Subroutines in this module : surf_land_orchidee
9	! Init_orchidee_index
10	! Get_orchidee_communicator
11	! Init_neighbours
12	#ifdef CPP_VEGET
13
14	USE dimphy
15	USE intersurf ! module d'ORCHIDEE
16	USE cpl_mod, ONLY : cpl_send_land_fields
17	USE surface_data, ONLY : ocean, ok_veget
18	USE comgeomphy, ONLY : cuphy, cvphy
19	USE mod_grid_phy_lmdz
20	USE mod_phys_lmdz_para
21
22	IMPLICIT NONE
23
24	PRIVATE
25	PUBLIC :: surf_land_orchidee
26
27	CONTAINS
28	!
29	!****************************************************************************************
30	!
31	SUBROUTINE surf_land_orchidee(itime, dtime, date0, knon, &
32	knindex, rlon, rlat, pctsrf, &
33	debut, lafin, &
34	plev, u1_lay, v1_lay, temp_air, spechum, epot_air, ccanopy, &
35	tq_cdrag, petAcoef, peqAcoef, petBcoef, peqBcoef, &
36	precip_rain, precip_snow, lwdown, swnet, swdown, &
37	ps, &
38	evap, fluxsens, fluxlat, &
39	tsol_rad, tsurf_new, alb_new, alblw, &
40	emis_new, z0_new, qsurf)
41	!
42	! Cette routine sert d'interface entre le modele atmospherique et le
43	! modele de sol continental. Appel a sechiba
44	!
45	! L. Fairhead 02/2000
46	!
47	! input:
48	! itime numero du pas de temps
49	! dtime pas de temps de la physique (en s)
50	! nisurf index de la surface a traiter (1 = sol continental)
51	! knon nombre de points de la surface a traiter
52	! knindex index des points de la surface a traiter
53	! rlon longitudes de la grille entiere
54	! rlat latitudes de la grille entiere
55	! pctsrf tableau des fractions de surface de chaque maille
56	! debut logical: 1er appel a la physique (lire les restart)
57	! lafin logical: dernier appel a la physique (ecrire les restart)
58	! (si false calcul simplifie des fluxs sur les continents)
59	! plev hauteur de la premiere couche (Pa)
60	! u1_lay vitesse u 1ere couche
61	! v1_lay vitesse v 1ere couche
62	! temp_air temperature de l'air 1ere couche
63	! spechum humidite specifique 1ere couche
64	! epot_air temp pot de l'air
65	! ccanopy concentration CO2 canopee
66	! tq_cdrag cdrag
67	! petAcoef coeff. A de la resolution de la CL pour t
68	! peqAcoef coeff. A de la resolution de la CL pour q
69	! petBcoef coeff. B de la resolution de la CL pour t
70	! peqBcoef coeff. B de la resolution de la CL pour q
71	! precip_rain precipitation liquide
72	! precip_snow precipitation solide
73	! lwdown flux IR descendant a la surface
74	! swnet flux solaire net
75	! swdown flux solaire entrant a la surface
76	! ps pression au sol
77	! radsol rayonnement net aus sol (LW + SW)
78	!
79	!
80	! output:
81	! evap evaporation totale
82	! fluxsens flux de chaleur sensible
83	! fluxlat flux de chaleur latente
84	! tsol_rad
85	! tsurf_new temperature au sol
86	! alb_new albedo
87	! emis_new emissivite
88	! z0_new surface roughness
89	! qsurf air moisture at surface
90	!
91	INCLUDE "indicesol.h"
92	INCLUDE "temps.h"
93	INCLUDE "YOMCST.h"
94	INCLUDE "iniprint.h"
95	INCLUDE "dimensions.h"
96
97	!
98	! Parametres d'entree
99	!****************************************************************************************
100	INTEGER, INTENT(IN) :: itime
101	REAL, INTENT(IN) :: dtime
102	REAL, INTENT(IN) :: date0
103	INTEGER, INTENT(IN) :: knon
104	INTEGER, DIMENSION(klon), INTENT(IN) :: knindex
105	LOGICAL, INTENT(IN) :: debut, lafin
106	REAL, DIMENSION(klon,nbsrf), INTENT(IN) :: pctsrf
107	REAL, DIMENSION(klon), INTENT(IN) :: rlon, rlat
108	REAL, DIMENSION(klon), INTENT(IN) :: plev
109	REAL, DIMENSION(klon), INTENT(IN) :: u1_lay, v1_lay
110	REAL, DIMENSION(klon), INTENT(IN) :: temp_air, spechum
111	REAL, DIMENSION(klon), INTENT(IN) :: epot_air, ccanopy
112	REAL, DIMENSION(klon), INTENT(IN) :: tq_cdrag
113	REAL, DIMENSION(klon), INTENT(IN) :: petAcoef, peqAcoef
114	REAL, DIMENSION(klon), INTENT(IN) :: petBcoef, peqBcoef
115	REAL, DIMENSION(klon), INTENT(IN) :: precip_rain, precip_snow
116	REAL, DIMENSION(klon), INTENT(IN) :: lwdown, swnet, swdown, ps
117	REAL, DIMENSION(klon) :: swdown_vrai
118
119	! Parametres de sortie
120	!****************************************************************************************
121	REAL, DIMENSION(klon), INTENT(OUT) :: evap, fluxsens, fluxlat, qsurf
122	REAL, DIMENSION(klon), INTENT(OUT) :: tsol_rad, tsurf_new, alb_new, alblw
123	REAL, DIMENSION(klon), INTENT(OUT) :: emis_new, z0_new
124
125	! Local
126	!****************************************************************************************
127	INTEGER :: ij, jj, igrid, ireal, index
128	INTEGER :: error
129	CHARACTER (len = 20) :: modname = 'surf_land_orchidee'
130	CHARACTER (len = 80) :: abort_message
131	LOGICAL,SAVE :: check = .FALSE.
132	!$OMP THREADPRIVATE(check)
133
134	! type de couplage dans sechiba
135	! character (len=10) :: coupling = 'implicit'
136	! drapeaux controlant les appels dans SECHIBA
137	! type(control_type), save :: control_in
138	! Preserved albedo
139	REAL, ALLOCATABLE, DIMENSION(:), SAVE :: albedo_keep, zlev
140	!$OMP THREADPRIVATE(albedo_keep,zlev)
141	! coordonnees geographiques
142	REAL, ALLOCATABLE, DIMENSION(:,:), SAVE :: lalo
143	!$OMP THREADPRIVATE(lalo)
144	! pts voisins
145	INTEGER,ALLOCATABLE, DIMENSION(:,:), SAVE :: neighbours
146	!$OMP THREADPRIVATE(neighbours)
147	! fractions continents
148	REAL,ALLOCATABLE, DIMENSION(:), SAVE :: contfrac
149	!$OMP THREADPRIVATE(contfrac)
150	! resolution de la grille
151	REAL, ALLOCATABLE, DIMENSION (:,:), SAVE :: resolution
152	!$OMP THREADPRIVATE(resolution)
153
154	REAL, ALLOCATABLE, DIMENSION (:,:), SAVE :: lon_scat, lat_scat
155	!$OMP THREADPRIVATE(lon_scat,lat_scat)
156
157	LOGICAL, SAVE :: lrestart_read = .TRUE.
158	!$OMP THREADPRIVATE(lrestart_read)
159	LOGICAL, SAVE :: lrestart_write = .FALSE.
160	!$OMP THREADPRIVATE(lrestart_write)
161
162	REAL, DIMENSION(knon,2) :: albedo_out
163	!$OMP THREADPRIVATE(albedo_out)
164
165	! Pb de nomenclature
166	REAL, DIMENSION(klon) :: petA_orc, peqA_orc
167	REAL, DIMENSION(klon) :: petB_orc, peqB_orc
168	! Pb de correspondances de grilles
169	INTEGER, DIMENSION(:), SAVE, ALLOCATABLE :: ig, jg
170	!$OMP THREADPRIVATE(ig,jg)
171	INTEGER :: indi, indj
172	INTEGER, SAVE, ALLOCATABLE,DIMENSION(:) :: ktindex
173	!$OMP THREADPRIVATE(ktindex)
174
175	! Essai cdrag
176	REAL, DIMENSION(klon) :: cdrag
177	INTEGER,SAVE :: offset
178	!$OMP THREADPRIVATE(offset)
179
180	REAL, DIMENSION(klon_glo) :: rlon_g,rlat_g
181	INTEGER, SAVE :: orch_comm
182	!$OMP THREADPRIVATE(orch_comm)
183
184	REAL, ALLOCATABLE, DIMENSION(:), SAVE :: coastalflow
185	!$OMP THREADPRIVATE(coastalflow)
186	REAL, ALLOCATABLE, DIMENSION(:), SAVE :: riverflow
187	!$OMP THREADPRIVATE(riverflow)
188	!
189	! Fin definition
190	!****************************************************************************************
191
192	IF (check) WRITE(lunout,*)'Entree ', modname
193	IF (check) WRITE(lunout,*)'ok_veget = ',ok_veget
194
195	! Initialisation
196
197	IF (debut) THEN
198	ALLOCATE(ktindex(knon))
199	IF ( .NOT. ALLOCATED(albedo_keep)) THEN
200	ALLOCATE(albedo_keep(klon))
201	ALLOCATE(zlev(knon))
202	ENDIF
203	! Pb de correspondances de grilles
204	ALLOCATE(ig(klon))
205	ALLOCATE(jg(klon))
206	ig(1) = 1
207	jg(1) = 1
208	indi = 0
209	indj = 2
210	DO igrid = 2, klon - 1
211	indi = indi + 1
212	IF ( indi > iim) THEN
213	indi = 1
214	indj = indj + 1
215	ENDIF
216	ig(igrid) = indi
217	jg(igrid) = indj
218	ENDDO
219	ig(klon) = 1
220	jg(klon) = jjm + 1
221
222	IF ((.NOT. ALLOCATED(lalo))) THEN
223	ALLOCATE(lalo(knon,2), stat = error)
224	IF (error /= 0) THEN
225	abort_message='Pb allocation lalo'
226	CALL abort_gcm(modname,abort_message,1)
227	ENDIF
228	ENDIF
229	IF ((.NOT. ALLOCATED(lon_scat))) THEN
230	ALLOCATE(lon_scat(iim,jjm+1), stat = error)
231	IF (error /= 0) THEN
232	abort_message='Pb allocation lon_scat'
233	CALL abort_gcm(modname,abort_message,1)
234	ENDIF
235	ENDIF
236	IF ((.NOT. ALLOCATED(lat_scat))) THEN
237	ALLOCATE(lat_scat(iim,jjm+1), stat = error)
238	IF (error /= 0) THEN
239	abort_message='Pb allocation lat_scat'
240	CALL abort_gcm(modname,abort_message,1)
241	ENDIF
242	ENDIF
243	lon_scat = 0.
244	lat_scat = 0.
245	DO igrid = 1, knon
246	index = knindex(igrid)
247	lalo(igrid,2) = rlon(index)
248	lalo(igrid,1) = rlat(index)
249	ENDDO
250
251
252
253	CALL Gather(rlon,rlon_g)
254	CALL Gather(rlat,rlat_g)
255
256	IF (is_mpi_root) THEN
257	index = 1
258	DO jj = 2, jjm
259	DO ij = 1, iim
260	index = index + 1
261	lon_scat(ij,jj) = rlon_g(index)
262	lat_scat(ij,jj) = rlat_g(index)
263	ENDDO
264	ENDDO
265	lon_scat(:,1) = lon_scat(:,2)
266	lat_scat(:,1) = rlat_g(1)
267	lon_scat(:,jjm+1) = lon_scat(:,2)
268	lat_scat(:,jjm+1) = rlat_g(klon_glo)
269	ENDIF
270
271
272	!
273	! Allouer et initialiser le tableau des voisins et des fraction de continents
274	!
275	IF ( (.NOT.ALLOCATED(neighbours))) THEN
276	ALLOCATE(neighbours(knon,8), stat = error)
277	IF (error /= 0) THEN
278	abort_message='Pb allocation neighbours'
279	CALL abort_gcm(modname,abort_message,1)
280	ENDIF
281	ENDIF
282	neighbours = -1.
283	IF (( .NOT. ALLOCATED(contfrac))) THEN
284	ALLOCATE(contfrac(knon), stat = error)
285	IF (error /= 0) THEN
286	abort_message='Pb allocation contfrac'
287	CALL abort_gcm(modname,abort_message,1)
288	ENDIF
289	ENDIF
290
291	DO igrid = 1, knon
292	ireal = knindex(igrid)
293	contfrac(igrid) = pctsrf(ireal,is_ter)
294	ENDDO
295
296
297	CALL Init_neighbours(knon,neighbours,knindex,pctsrf(:,is_ter))
298
299	!
300	! Allocation et calcul resolutions
301	IF ( (.NOT.ALLOCATED(resolution))) THEN
302	ALLOCATE(resolution(knon,2), stat = error)
303	IF (error /= 0) THEN
304	abort_message='Pb allocation resolution'
305	CALL abort_gcm(modname,abort_message,1)
306	ENDIF
307	ENDIF
308	DO igrid = 1, knon
309	ij = knindex(igrid)
310	resolution(igrid,1) = cuphy(ij)
311	resolution(igrid,2) = cvphy(ij)
312	ENDDO
313
314	ALLOCATE(coastalflow(klon), stat = error)
315	IF (error /= 0) THEN
316	abort_message='Pb allocation coastalflow'
317	CALL abort_gcm(modname,abort_message,1)
318	ENDIF
319
320	ALLOCATE(riverflow(klon), stat = error)
321	IF (error /= 0) THEN
322	abort_message='Pb allocation riverflow'
323	CALL abort_gcm(modname,abort_message,1)
324	ENDIF
325
326	ENDIF ! (fin debut)
327
328	!
329	! Appel a la routine sols continentaux
330	!
331	IF (lafin) lrestart_write = .TRUE.
332	IF (check) WRITE(lunout,*)'lafin ',lafin,lrestart_write
333
334	petA_orc(1:knon) = petBcoef(1:knon) * dtime
335	petB_orc(1:knon) = petAcoef(1:knon)
336	peqA_orc(1:knon) = peqBcoef(1:knon) * dtime
337	peqB_orc(1:knon) = peqAcoef(1:knon)
338
339	cdrag = 0.
340	cdrag(1:knon) = tq_cdrag(1:knon)
341
342	! zlev(1:knon) = (100.plev(1:knon))/((ps(1:knon)/287.05temp_air(1:knon))*9.80665)
343	zlev(1:knon) = (100.plev(1:knon))/((ps(1:knon)/RDtemp_air(1:knon))*RG)
344
345
346	! PF et PASB
347	! where(cdrag > 0.01)
348	! cdrag = 0.01
349	! endwhere
350	! write(,)'Cdrag = ',minval(cdrag),maxval(cdrag)
351
352	!
353	! Init Orchidee
354	!
355	! if (pole_nord) then
356	! offset=0
357	! ktindex(:)=ktindex(:)+iim-1
358	! else
359	! offset = klon_mpi_begin-1+iim-1
360	! ktindex(:)=ktindex(:)+MOD(offset,iim)
361	! offset=offset-MOD(offset,iim)
362	! endif
363
364	IF (debut) THEN
365	CALL Get_orchidee_communicator(knon,orch_comm)
366	IF (knon /=0) THEN
367	CALL Init_orchidee_index(knon,orch_comm,knindex,offset,ktindex)
368
369	#ifndef CPP_PARA
370	#define ORC_PREPAR
371	#endif
372	#ifdef ORC_PREPAR
373	! Interface for version 1.8 or earlier of ORCHIDEE
374	CALL intersurf_main (itime+itau_phy-1, iim, jjm+1, knon, ktindex, dtime, &
375	lrestart_read, lrestart_write, lalo, &
376	contfrac, neighbours, resolution, date0, &
377	zlev, u1_lay, v1_lay, spechum, temp_air, epot_air, ccanopy, &
378	cdrag, petA_orc, peqA_orc, petB_orc, peqB_orc, &
379	precip_rain, precip_snow, lwdown, swnet, swdown, ps, &
380	evap, fluxsens, fluxlat, coastalflow, riverflow, &
381	tsol_rad, tsurf_new, qsurf, albedo_out, emis_new, z0_new, &
382	lon_scat, lat_scat)
383
384	#else
385	CALL intersurf_main (itime+itau_phy-1, iim, jjm+1, offset, knon, ktindex, &
386	orch_comm, dtime, lrestart_read, lrestart_write, lalo, &
387	contfrac, neighbours, resolution, date0, &
388	zlev, u1_lay(1:knon), v1_lay(1:knon), spechum(1:knon), temp_air(1:knon), epot_air(1:knon), ccanopy(1:knon), &
389	cdrag(1:knon), petA_orc(1:knon), peqA_orc(1:knon), petB_orc(1:knon), peqB_orc(1:knon), &
390	precip_rain(1:knon), precip_snow(1:knon), lwdown(1:knon), swnet(1:knon), swdown(1:knon), ps(1:knon), &
391	evap(1:knon), fluxsens(1:knon), fluxlat(1:knon), coastalflow(1:knon), riverflow(1:knon), &
392	tsol_rad(1:knon), tsurf_new(1:knon), qsurf(1:knon), albedo_out(1:knon,:), emis_new(1:knon), z0_new(1:knon), &
393	lon_scat, lat_scat)
394	#endif
395
396	ENDIF
397
398	albedo_keep(1:knon) = (albedo_out(1:knon,1)+albedo_out(1:knon,2))/2.
399
400	ENDIF
401
402	! swdown_vrai(1:knon) = swnet(1:knon)/(1. - albedo_keep(1:knon))
403	swdown_vrai(1:knon) = swdown(1:knon)
404
405	IF (knon /=0) THEN
406
407	#ifdef ORC_PREPAR
408	! Interface for version 1.8 or earlier of ORCHIDEE
409	CALL intersurf_main (itime+itau_phy-1, iim, jjm+1, knon, ktindex, dtime, &
410	lrestart_read, lrestart_write, lalo, &
411	contfrac, neighbours, resolution, date0, &
412	zlev, u1_lay, v1_lay, spechum, temp_air, epot_air, ccanopy, &
413	cdrag, petA_orc, peqA_orc, petB_orc, peqB_orc, &
414	precip_rain, precip_snow, lwdown, swnet, swdown, ps, &
415	evap, fluxsens, fluxlat, coastalflow, riverflow, &
416	tsol_rad, tsurf_new, qsurf, albedo_out, emis_new, z0_new, &
417	lon_scat, lat_scat)
418
419	#else
420
421	CALL intersurf_main (itime+itau_phy, iim, jjm+1,offset, knon, ktindex, &
422	orch_comm,dtime, lrestart_read, lrestart_write, lalo, &
423	contfrac, neighbours, resolution, date0, &
424	zlev, u1_lay(1:knon), v1_lay(1:knon), spechum(1:knon), temp_air(1:knon), epot_air(1:knon), ccanopy(1:knon), &
425	cdrag(1:knon), petA_orc(1:knon), peqA_orc(1:knon), petB_orc(1:knon), peqB_orc(1:knon), &
426	precip_rain(1:knon), precip_snow(1:knon), lwdown(1:knon), swnet(1:knon), swdown_vrai(1:knon), ps(1:knon), &
427	evap(1:knon), fluxsens(1:knon), fluxlat(1:knon), coastalflow(1:knon), riverflow(1:knon), &
428	tsol_rad(1:knon), tsurf_new(1:knon), qsurf(1:knon), albedo_out(1:knon,:), emis_new(1:knon), z0_new(1:knon), &
429	lon_scat, lat_scat)
430	#endif
431
432	ENDIF
433
434	albedo_keep(1:knon) = (albedo_out(1:knon,1)+albedo_out(1:knon,2))/2.
435
436	!* Send to coupler
437	!
438	IF (ocean=='couple') THEN
439	CALL cpl_send_land_fields(itime, knon, knindex, &
440	riverflow, coastalflow)
441	ENDIF
442
443	alb_new(1:knon) = albedo_out(1:knon,1)
444	alblw(1:knon) = albedo_out(1:knon,2)
445
446	! Convention orchidee: positif vers le haut
447	fluxsens(1:knon) = -1. * fluxsens(1:knon)
448	fluxlat(1:knon) = -1. * fluxlat(1:knon)
449
450	! evap = -1. * evap
451
452	IF (debut) lrestart_read = .FALSE.
453
454	END SUBROUTINE surf_land_orchidee
455	!
456	!****************************************************************************************
457	!
458	SUBROUTINE Init_orchidee_index(knon,orch_comm,knindex,offset,ktindex)
459
460	INCLUDE "dimensions.h"
461
462	#ifdef CPP_PARA
463	INCLUDE 'mpif.h'
464	#endif
465
466
467	! Input arguments
468	!****************************************************************************************
469	INTEGER, INTENT(IN) :: knon
470	INTEGER, INTENT(IN) :: orch_comm
471	INTEGER, DIMENSION(klon), INTENT(IN) :: knindex
472
473	! Output arguments
474	!****************************************************************************************
475	INTEGER, INTENT(OUT) :: offset
476	INTEGER, DIMENSION(knon), INTENT(OUT) :: ktindex
477
478	! Local varables
479	!****************************************************************************************
480	#ifdef CPP_PARA
481	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: status
482	#endif
483
484	INTEGER :: MyLastPoint
485	INTEGER :: LastPoint
486	INTEGER :: mpi_rank
487	INTEGER :: mpi_size
488	INTEGER :: ierr
489	!
490	! End definition
491	!****************************************************************************************
492
493	MyLastPoint=klon_mpi_begin-1+knindex(knon)+iim-1
494
495	IF (is_parallel) THEN
496	#ifdef CPP_PARA
497	CALL MPI_COMM_SIZE(orch_comm,mpi_size,ierr)
498	CALL MPI_COMM_RANK(orch_comm,mpi_rank,ierr)
499	#endif
500	ELSE
501	mpi_rank=0
502	mpi_size=1
503	ENDIF
504
505	IF (is_parallel) THEN
506	IF (.NOT. is_north_pole) THEN
507	#ifdef CPP_PARA
508	CALL MPI_RECV(LastPoint,1,MPI_INTEGER,mpi_rank-1,1234,orch_comm,status,ierr)
509	#endif
510	ENDIF
511
512	IF (.NOT. is_south_pole) THEN
513	#ifdef CPP_PARA
514	CALL MPI_SEND(MyLastPoint,1,MPI_INTEGER,mpi_rank+1,1234,orch_comm,ierr)
515	#endif
516	ENDIF
517	ENDIF
518
519	IF (is_north_pole) THEN
520	offset=0
521	ELSE
522	offset=LastPoint-MOD(LastPoint,iim)
523	ENDIF
524
525	ktindex(1:knon)=knindex(1:knon)+(klon_mpi_begin+iim-1)-offset-1
526
527
528	END SUBROUTINE Init_orchidee_index
529	!
530	!****************************************************************************************
531	!
532	SUBROUTINE Get_orchidee_communicator(knon,orch_comm)
533
534	#ifdef CPP_PARA
535	INCLUDE 'mpif.h'
536	#endif
537
538
539	INTEGER,INTENT(IN) :: knon
540	INTEGER,INTENT(OUT) :: orch_comm
541
542	INTEGER :: color
543	INTEGER :: ierr
544	!
545	! End definition
546	!****************************************************************************************
547
548	IF (knon==0) THEN
549	color = 0
550	ELSE
551	color = 1
552	ENDIF
553
554	#ifdef CPP_PARA
555	CALL MPI_COMM_SPLIT(COMM_LMDZ_PHY,color,mpi_rank,orch_comm,ierr)
556	#endif
557
558	END SUBROUTINE Get_orchidee_communicator
559	!
560	!****************************************************************************************
561	!
562	SUBROUTINE Init_neighbours(knon,neighbours,ktindex,pctsrf)
563
564	INCLUDE "indicesol.h"
565	INCLUDE "dimensions.h"
566	#ifdef CPP_PARA
567	INCLUDE 'mpif.h'
568	#endif
569
570	! Input arguments
571	!****************************************************************************************
572	INTEGER, INTENT(IN) :: knon
573	INTEGER, DIMENSION(klon), INTENT(IN) :: ktindex
574	REAL, DIMENSION(klon), INTENT(IN) :: pctsrf
575
576	! Output arguments
577	!****************************************************************************************
578	INTEGER, DIMENSION(knon,8), INTENT(OUT) :: neighbours
579
580	! Local variables
581	!****************************************************************************************
582	INTEGER :: knon_g
583	INTEGER :: i, igrid, jj, ij, iglob
584	INTEGER :: ierr, ireal, index
585	INTEGER, DIMENSION(0:mpi_size-1) :: knon_nb
586	INTEGER, DIMENSION(0:mpi_size-1) :: displs
587	INTEGER, DIMENSION(8,3) :: off_ini
588	INTEGER, DIMENSION(8) :: offset
589	INTEGER, DIMENSION(knon) :: ktindex_p
590	INTEGER, DIMENSION(iim,jjm+1) :: correspond
591	INTEGER, ALLOCATABLE, DIMENSION(:) :: ktindex_g
592	INTEGER, ALLOCATABLE, DIMENSION(:,:) :: neighbours_g
593	REAL, DIMENSION(klon_glo) :: pctsrf_g
594
595	!
596	! End definition
597	!****************************************************************************************
598
599	IF (is_sequential) THEN
600	knon_nb(:)=knon
601	ELSE
602
603	#ifdef CPP_PARA
604	CALL MPI_GATHER(knon,1,MPI_INTEGER,knon_nb,1,MPI_INTEGER,0,COMM_LMDZ_PHY,ierr)
605	#endif
606
607	ENDIF
608
609	IF (is_mpi_root) THEN
610	knon_g=SUM(knon_nb(:))
611	ALLOCATE(ktindex_g(knon_g))
612	ALLOCATE(neighbours_g(knon_g,8))
613	neighbours_g(:,:)=-1
614	displs(0)=0
615	DO i=1,mpi_size-1
616	displs(i)=displs(i-1)+knon_nb(i-1)
617	ENDDO
618	ENDIF
619
620	ktindex_p(1:knon)=ktindex(1:knon)+klon_mpi_begin-1+iim-1
621
622	IF (is_sequential) THEN
623	ktindex_g(:)=ktindex_p(:)
624	ELSE
625
626	#ifdef CPP_PARA
627	CALL MPI_GATHERV(ktindex_p,knon,MPI_INTEGER,ktindex_g,knon_nb,&
628	displs,MPI_INTEGER,0,COMM_LMDZ_PHY,ierr)
629	#endif
630
631	ENDIF
632
633	CALL Gather(pctsrf,pctsrf_g)
634
635	IF (is_mpi_root) THEN
636	! Initialisation des offset
637	!
638	! offset bord ouest
639	off_ini(1,1) = - iim ; off_ini(2,1) = - iim + 1; off_ini(3,1) = 1
640	off_ini(4,1) = iim + 1; off_ini(5,1) = iim ; off_ini(6,1) = 2 * iim - 1
641	off_ini(7,1) = iim -1 ; off_ini(8,1) = - 1
642	! offset point normal
643	off_ini(1,2) = - iim ; off_ini(2,2) = - iim + 1; off_ini(3,2) = 1
644	off_ini(4,2) = iim + 1; off_ini(5,2) = iim ; off_ini(6,2) = iim - 1
645	off_ini(7,2) = -1 ; off_ini(8,2) = - iim - 1
646	! offset bord est
647	off_ini(1,3) = - iim; off_ini(2,3) = - 2 * iim + 1; off_ini(3,3) = - iim + 1
648	off_ini(4,3) = 1 ; off_ini(5,3) = iim ; off_ini(6,3) = iim - 1
649	off_ini(7,3) = -1 ; off_ini(8,3) = - iim - 1
650	!
651	!
652	! Attention aux poles
653	!
654	DO igrid = 1, knon_g
655	index = ktindex_g(igrid)
656	jj = INT((index - 1)/iim) + 1
657	ij = index - (jj - 1) * iim
658	correspond(ij,jj) = igrid
659	ENDDO
660
661	DO igrid = 1, knon_g
662	iglob = ktindex_g(igrid)
663	IF (MOD(iglob, iim) == 1) THEN
664	offset = off_ini(:,1)
665	ELSE IF(MOD(iglob, iim) == 0) THEN
666	offset = off_ini(:,3)
667	ELSE
668	offset = off_ini(:,2)
669	ENDIF
670	DO i = 1, 8
671	index = iglob + offset(i)
672	ireal = (MIN(MAX(1, index - iim + 1), klon_glo))
673	IF (pctsrf_g(ireal) > EPSFRA) THEN
674	jj = INT((index - 1)/iim) + 1
675	ij = index - (jj - 1) * iim
676	neighbours_g(igrid, i) = correspond(ij, jj)
677	ENDIF
678	ENDDO
679	ENDDO
680
681	ENDIF
682
683	DO i=1,8
684	IF (is_sequential) THEN
685	neighbours(:,i)=neighbours_g(:,i)
686	ELSE
687	#ifdef CPP_PARA
688	CALL MPI_SCATTERV(neighbours_g(:,i),knon_nb,displs,MPI_INTEGER,neighbours(:,i),knon,MPI_INTEGER,0,COMM_LMDZ_PHY,ierr)
689	#endif
690	ENDIF
691	ENDDO
692
693	END SUBROUTINE Init_neighbours
694	!
695	!****************************************************************************************
696	!
697
698	#endif
699
700	END MODULE surf_land_orchidee_mod

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