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surf_land_orchidee_mod.F90 @ 1265

Last change on this file since 1265 was 1146, checked in by Laurent Fairhead, 16 years ago
Réintegration dans le tronc des modifications issues de la branche LMDZ-dev comprises entre la révision 1074 et 1145 Validation: une simulation de 1 jour en séquentiel sur PC donne les mêmes résultats entre la trunk et la dev LF
Property svn:eol-style set to `native` Property svn:executable set to ``* Property svn:keywords set to `Author Date Id Revision`
File size: 21.3 KB

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1	!
2	MODULE surf_land_orchidee_mod
3	#ifndef ORCHIDEE_NOOPENMP
4	!
5	! This module controles the interface towards the model ORCHIDEE
6	!
7	! Subroutines in this module : surf_land_orchidee
8	! Init_orchidee_index
9	! Get_orchidee_communicator
10	! Init_neighbours
11
12	USE dimphy
13	#ifdef CPP_VEGET
14	USE intersurf ! module d'ORCHIDEE
15	#endif
16	USE cpl_mod, ONLY : cpl_send_land_fields
17	USE surface_data, ONLY : type_ocean
18	USE comgeomphy, ONLY : cuphy, cvphy
19	USE mod_grid_phy_lmdz
20	USE mod_phys_lmdz_para, mpi_root_rank=>mpi_root
21
22	IMPLICIT NONE
23
24	PRIVATE
25	PUBLIC :: surf_land_orchidee
26
27	LOGICAL, ALLOCATABLE, SAVE :: flag_omp(:)
28	CONTAINS
29	!
30	!****************************************************************************************
31	!
32	SUBROUTINE surf_land_orchidee(itime, dtime, date0, knon, &
33	knindex, rlon, rlat, pctsrf, &
34	debut, lafin, &
35	plev, u1_lay, v1_lay, temp_air, spechum, epot_air, ccanopy, &
36	tq_cdrag, petAcoef, peqAcoef, petBcoef, peqBcoef, &
37	precip_rain, precip_snow, lwdown, swnet, swdown, &
38	ps, q2m, t2m, &
39	evap, fluxsens, fluxlat, &
40	tsol_rad, tsurf_new, alb1_new, alb2_new, &
41	emis_new, z0_new, qsurf)
42	USE mod_surf_para
43	USE mod_synchro_omp
44
45	!
46	! Cette routine sert d'interface entre le modele atmospherique et le
47	! modele de sol continental. Appel a sechiba
48	!
49	! L. Fairhead 02/2000
50	!
51	! input:
52	! itime numero du pas de temps
53	! dtime pas de temps de la physique (en s)
54	! nisurf index de la surface a traiter (1 = sol continental)
55	! knon nombre de points de la surface a traiter
56	! knindex index des points de la surface a traiter
57	! rlon longitudes de la grille entiere
58	! rlat latitudes de la grille entiere
59	! pctsrf tableau des fractions de surface de chaque maille
60	! debut logical: 1er appel a la physique (lire les restart)
61	! lafin logical: dernier appel a la physique (ecrire les restart)
62	! (si false calcul simplifie des fluxs sur les continents)
63	! plev hauteur de la premiere couche (Pa)
64	! u1_lay vitesse u 1ere couche
65	! v1_lay vitesse v 1ere couche
66	! temp_air temperature de l'air 1ere couche
67	! spechum humidite specifique 1ere couche
68	! epot_air temp pot de l'air
69	! ccanopy concentration CO2 canopee
70	! tq_cdrag cdrag
71	! petAcoef coeff. A de la resolution de la CL pour t
72	! peqAcoef coeff. A de la resolution de la CL pour q
73	! petBcoef coeff. B de la resolution de la CL pour t
74	! peqBcoef coeff. B de la resolution de la CL pour q
75	! precip_rain precipitation liquide
76	! precip_snow precipitation solide
77	! lwdown flux IR descendant a la surface
78	! swnet flux solaire net
79	! swdown flux solaire entrant a la surface
80	! ps pression au sol
81	! radsol rayonnement net aus sol (LW + SW)
82	!
83	!
84	! output:
85	! evap evaporation totale
86	! fluxsens flux de chaleur sensible
87	! fluxlat flux de chaleur latente
88	! tsol_rad
89	! tsurf_new temperature au sol
90	! alb1_new albedo in visible SW interval
91	! alb2_new albedo in near IR interval
92	! emis_new emissivite
93	! z0_new surface roughness
94	! qsurf air moisture at surface
95	!
96	INCLUDE "indicesol.h"
97	INCLUDE "temps.h"
98	INCLUDE "YOMCST.h"
99	INCLUDE "iniprint.h"
100	INCLUDE "dimensions.h"
101
102	!
103	! Parametres d'entree
104	!****************************************************************************************
105	INTEGER, INTENT(IN) :: itime
106	REAL, INTENT(IN) :: dtime
107	REAL, INTENT(IN) :: date0
108	INTEGER, INTENT(IN) :: knon
109	INTEGER, DIMENSION(klon), INTENT(IN) :: knindex
110	LOGICAL, INTENT(IN) :: debut, lafin
111	REAL, DIMENSION(klon,nbsrf), INTENT(IN) :: pctsrf
112	REAL, DIMENSION(klon), INTENT(IN) :: rlon, rlat
113	REAL, DIMENSION(klon), INTENT(IN) :: plev
114	REAL, DIMENSION(klon), INTENT(IN) :: u1_lay, v1_lay
115	REAL, DIMENSION(klon), INTENT(IN) :: temp_air, spechum
116	REAL, DIMENSION(klon), INTENT(IN) :: epot_air, ccanopy
117	REAL, DIMENSION(klon), INTENT(IN) :: tq_cdrag
118	REAL, DIMENSION(klon), INTENT(IN) :: petAcoef, peqAcoef
119	REAL, DIMENSION(klon), INTENT(IN) :: petBcoef, peqBcoef
120	REAL, DIMENSION(klon), INTENT(IN) :: precip_rain, precip_snow
121	REAL, DIMENSION(klon), INTENT(IN) :: lwdown, swnet, swdown, ps
122	REAL, DIMENSION(klon), INTENT(IN) :: q2m, t2m
123
124	! Parametres de sortie
125	!****************************************************************************************
126	REAL, DIMENSION(klon), INTENT(OUT) :: evap, fluxsens, fluxlat, qsurf
127	REAL, DIMENSION(klon), INTENT(OUT) :: tsol_rad, tsurf_new
128	REAL, DIMENSION(klon), INTENT(OUT) :: alb1_new, alb2_new
129	REAL, DIMENSION(klon), INTENT(OUT) :: emis_new, z0_new
130
131	! Local
132	!****************************************************************************************
133	INTEGER :: ij, jj, igrid, ireal, index
134	INTEGER :: error
135	REAL, DIMENSION(klon) :: swdown_vrai
136	CHARACTER (len = 20) :: modname = 'surf_land_orchidee'
137	CHARACTER (len = 80) :: abort_message
138	LOGICAL,SAVE :: check = .FALSE.
139	!$OMP THREADPRIVATE(check)
140
141	! type de couplage dans sechiba
142	! character (len=10) :: coupling = 'implicit'
143	! drapeaux controlant les appels dans SECHIBA
144	! type(control_type), save :: control_in
145	! Preserved albedo
146	REAL, ALLOCATABLE, DIMENSION(:), SAVE :: albedo_keep, zlev
147	!$OMP THREADPRIVATE(albedo_keep,zlev)
148	! coordonnees geographiques
149	REAL, ALLOCATABLE, DIMENSION(:,:), SAVE :: lalo
150	!$OMP THREADPRIVATE(lalo)
151	! pts voisins
152	INTEGER,ALLOCATABLE, DIMENSION(:,:), SAVE :: neighbours
153	!$OMP THREADPRIVATE(neighbours)
154	! fractions continents
155	REAL,ALLOCATABLE, DIMENSION(:), SAVE :: contfrac
156	!$OMP THREADPRIVATE(contfrac)
157	! resolution de la grille
158	REAL, ALLOCATABLE, DIMENSION (:,:), SAVE :: resolution
159	!$OMP THREADPRIVATE(resolution)
160
161	REAL, ALLOCATABLE, DIMENSION (:,:), SAVE :: lon_scat, lat_scat
162	!$OMP THREADPRIVATE(lon_scat,lat_scat)
163
164	LOGICAL, SAVE :: lrestart_read = .TRUE.
165	!$OMP THREADPRIVATE(lrestart_read)
166	LOGICAL, SAVE :: lrestart_write = .FALSE.
167	!$OMP THREADPRIVATE(lrestart_write)
168
169	REAL, DIMENSION(knon,2) :: albedo_out
170
171	! Pb de nomenclature
172	REAL, DIMENSION(klon) :: petA_orc, peqA_orc
173	REAL, DIMENSION(klon) :: petB_orc, peqB_orc
174	! Pb de correspondances de grilles
175	INTEGER, DIMENSION(:), SAVE, ALLOCATABLE :: ig, jg
176	!$OMP THREADPRIVATE(ig,jg)
177	INTEGER :: indi, indj
178	INTEGER, SAVE, ALLOCATABLE,DIMENSION(:) :: ktindex
179	!$OMP THREADPRIVATE(ktindex)
180
181	! Essai cdrag
182	REAL, DIMENSION(klon) :: cdrag
183	INTEGER,SAVE :: offset
184	!$OMP THREADPRIVATE(offset)
185
186	REAL, DIMENSION(klon_glo) :: rlon_g,rlat_g
187	INTEGER, SAVE :: orch_comm
188	!$OMP THREADPRIVATE(orch_comm)
189
190	REAL, ALLOCATABLE, DIMENSION(:), SAVE :: coastalflow
191	!$OMP THREADPRIVATE(coastalflow)
192	REAL, ALLOCATABLE, DIMENSION(:), SAVE :: riverflow
193	!$OMP THREADPRIVATE(riverflow)
194
195	INTEGER :: orch_omp_rank
196	INTEGER :: orch_omp_size
197	!
198	! Fin definition
199	!****************************************************************************************
200
201	IF (check) WRITE(lunout,*)'Entree ', modname
202
203	! Initialisation
204
205	IF (debut) THEN
206	! Test of coherence between variable ok_veget and cpp key CPP_VEGET
207	#ifndef CPP_VEGET
208	abort_message='Pb de coherence: ok_veget = .true. mais CPP_VEGET = .false.'
209	CALL abort_gcm(modname,abort_message,1)
210	#endif
211
212	CALL Init_surf_para(knon)
213	ALLOCATE(ktindex(knon))
214	IF ( .NOT. ALLOCATED(albedo_keep)) THEN
215	!ym ALLOCATE(albedo_keep(klon))
216	!ym bizarre que non alloué en knon precedement
217	ALLOCATE(albedo_keep(knon))
218	ALLOCATE(zlev(knon))
219	ENDIF
220	! Pb de correspondances de grilles
221	ALLOCATE(ig(klon))
222	ALLOCATE(jg(klon))
223	ig(1) = 1
224	jg(1) = 1
225	indi = 0
226	indj = 2
227	DO igrid = 2, klon - 1
228	indi = indi + 1
229	IF ( indi > iim) THEN
230	indi = 1
231	indj = indj + 1
232	ENDIF
233	ig(igrid) = indi
234	jg(igrid) = indj
235	ENDDO
236	ig(klon) = 1
237	jg(klon) = jjm + 1
238
239	IF ((.NOT. ALLOCATED(lalo))) THEN
240	ALLOCATE(lalo(knon,2), stat = error)
241	IF (error /= 0) THEN
242	abort_message='Pb allocation lalo'
243	CALL abort_gcm(modname,abort_message,1)
244	ENDIF
245	ENDIF
246	IF ((.NOT. ALLOCATED(lon_scat))) THEN
247	ALLOCATE(lon_scat(iim,jjm+1), stat = error)
248	IF (error /= 0) THEN
249	abort_message='Pb allocation lon_scat'
250	CALL abort_gcm(modname,abort_message,1)
251	ENDIF
252	ENDIF
253	IF ((.NOT. ALLOCATED(lat_scat))) THEN
254	ALLOCATE(lat_scat(iim,jjm+1), stat = error)
255	IF (error /= 0) THEN
256	abort_message='Pb allocation lat_scat'
257	CALL abort_gcm(modname,abort_message,1)
258	ENDIF
259	ENDIF
260	lon_scat = 0.
261	lat_scat = 0.
262	DO igrid = 1, knon
263	index = knindex(igrid)
264	lalo(igrid,2) = rlon(index)
265	lalo(igrid,1) = rlat(index)
266	ENDDO
267
268
269
270	CALL Gather(rlon,rlon_g)
271	CALL Gather(rlat,rlat_g)
272
273	IF (is_mpi_root) THEN
274	index = 1
275	DO jj = 2, jjm
276	DO ij = 1, iim
277	index = index + 1
278	lon_scat(ij,jj) = rlon_g(index)
279	lat_scat(ij,jj) = rlat_g(index)
280	ENDDO
281	ENDDO
282	lon_scat(:,1) = lon_scat(:,2)
283	lat_scat(:,1) = rlat_g(1)
284	lon_scat(:,jjm+1) = lon_scat(:,2)
285	lat_scat(:,jjm+1) = rlat_g(klon_glo)
286	ENDIF
287
288	CALL bcast(lon_scat)
289	CALL bcast(lat_scat)
290	!
291	! Allouer et initialiser le tableau des voisins et des fraction de continents
292	!
293	IF ( (.NOT.ALLOCATED(neighbours))) THEN
294	ALLOCATE(neighbours(knon,8), stat = error)
295	IF (error /= 0) THEN
296	abort_message='Pb allocation neighbours'
297	CALL abort_gcm(modname,abort_message,1)
298	ENDIF
299	ENDIF
300	neighbours = -1.
301	IF (( .NOT. ALLOCATED(contfrac))) THEN
302	ALLOCATE(contfrac(knon), stat = error)
303	IF (error /= 0) THEN
304	abort_message='Pb allocation contfrac'
305	CALL abort_gcm(modname,abort_message,1)
306	ENDIF
307	ENDIF
308
309	DO igrid = 1, knon
310	ireal = knindex(igrid)
311	contfrac(igrid) = pctsrf(ireal,is_ter)
312	ENDDO
313
314
315	CALL Init_neighbours(knon,neighbours,knindex,pctsrf(:,is_ter))
316
317	!
318	! Allocation et calcul resolutions
319	IF ( (.NOT.ALLOCATED(resolution))) THEN
320	ALLOCATE(resolution(knon,2), stat = error)
321	IF (error /= 0) THEN
322	abort_message='Pb allocation resolution'
323	CALL abort_gcm(modname,abort_message,1)
324	ENDIF
325	ENDIF
326	DO igrid = 1, knon
327	ij = knindex(igrid)
328	resolution(igrid,1) = cuphy(ij)
329	resolution(igrid,2) = cvphy(ij)
330	ENDDO
331
332	ALLOCATE(coastalflow(klon), stat = error)
333	IF (error /= 0) THEN
334	abort_message='Pb allocation coastalflow'
335	CALL abort_gcm(modname,abort_message,1)
336	ENDIF
337
338	ALLOCATE(riverflow(klon), stat = error)
339	IF (error /= 0) THEN
340	abort_message='Pb allocation riverflow'
341	CALL abort_gcm(modname,abort_message,1)
342	ENDIF
343
344	ENDIF ! (fin debut)
345
346	!
347	! Appel a la routine sols continentaux
348	!
349	IF (lafin) lrestart_write = .TRUE.
350	IF (check) WRITE(lunout,*)'lafin ',lafin,lrestart_write
351
352	petA_orc(1:knon) = petBcoef(1:knon) * dtime
353	petB_orc(1:knon) = petAcoef(1:knon)
354	peqA_orc(1:knon) = peqBcoef(1:knon) * dtime
355	peqB_orc(1:knon) = peqAcoef(1:knon)
356
357	cdrag = 0.
358	cdrag(1:knon) = tq_cdrag(1:knon)
359
360	! zlev(1:knon) = (100.plev(1:knon))/((ps(1:knon)/287.05temp_air(1:knon))*9.80665)
361	zlev(1:knon) = (100.plev(1:knon))/((ps(1:knon)/RDtemp_air(1:knon))*RG)
362
363
364	! PF et PASB
365	! where(cdrag > 0.01)
366	! cdrag = 0.01
367	! endwhere
368	! write(,)'Cdrag = ',minval(cdrag),maxval(cdrag)
369
370
371	IF (debut) THEN
372	CALL Init_orchidee_index(knon,knindex,offset,ktindex)
373	CALL Get_orchidee_communicator(orch_comm,orch_omp_size,orch_omp_rank)
374	CALL Init_synchro_omp
375
376	IF (knon > 0) THEN
377	#ifdef CPP_VEGET
378	CALL Init_intersurf(nbp_lon,nbp_lat,knon,ktindex,offset,orch_omp_size,orch_omp_rank,orch_comm)
379	#endif
380	ENDIF
381
382
383	IF (knon > 0) THEN
384
385	#ifdef CPP_VEGET
386	CALL intersurf_main (itime+itau_phy-1, iim, jjm+1, knon, ktindex, dtime, &
387	lrestart_read, lrestart_write, lalo, &
388	contfrac, neighbours, resolution, date0, &
389	zlev, u1_lay, v1_lay, spechum, temp_air, epot_air, ccanopy, &
390	cdrag, petA_orc, peqA_orc, petB_orc, peqB_orc, &
391	precip_rain, precip_snow, lwdown, swnet, swdown, ps, &
392	evap, fluxsens, fluxlat, coastalflow, riverflow, &
393	tsol_rad, tsurf_new, qsurf, albedo_out, emis_new, z0_new, &
394	lon_scat, lat_scat, q2m, t2m)
395	#endif
396	ENDIF
397
398	CALL Synchro_omp
399
400	albedo_keep(1:knon) = (albedo_out(1:knon,1)+albedo_out(1:knon,2))/2.
401
402	ENDIF
403
404
405	! swdown_vrai(1:knon) = swnet(1:knon)/(1. - albedo_keep(1:knon))
406	swdown_vrai(1:knon) = swdown(1:knon)
407
408	IF (knon > 0) THEN
409	#ifdef CPP_VEGET
410	CALL intersurf_main (itime+itau_phy, iim, jjm+1, knon, ktindex, dtime, &
411	lrestart_read, lrestart_write, lalo, &
412	contfrac, neighbours, resolution, date0, &
413	zlev, u1_lay(1:knon), v1_lay(1:knon), spechum(1:knon), temp_air(1:knon), epot_air(1:knon), ccanopy(1:knon), &
414	cdrag(1:knon), petA_orc(1:knon), peqA_orc(1:knon), petB_orc(1:knon), peqB_orc(1:knon), &
415	precip_rain(1:knon), precip_snow(1:knon), lwdown(1:knon), swnet(1:knon), swdown_vrai(1:knon), ps(1:knon), &
416	evap(1:knon), fluxsens(1:knon), fluxlat(1:knon), coastalflow(1:knon), riverflow(1:knon), &
417	tsol_rad(1:knon), tsurf_new(1:knon), qsurf(1:knon), albedo_out(1:knon,:), emis_new(1:knon), z0_new(1:knon), &
418	lon_scat, lat_scat, q2m, t2m)
419	#endif
420	ENDIF
421
422	CALL Synchro_omp
423
424	albedo_keep(1:knon) = (albedo_out(1:knon,1)+albedo_out(1:knon,2))/2.
425
426	!* Send to coupler
427	!
428	IF (type_ocean=='couple') THEN
429	CALL cpl_send_land_fields(itime, knon, knindex, &
430	riverflow, coastalflow)
431	ENDIF
432
433	alb1_new(1:knon) = albedo_out(1:knon,1)
434	alb2_new(1:knon) = albedo_out(1:knon,2)
435
436	! Convention orchidee: positif vers le haut
437	fluxsens(1:knon) = -1. * fluxsens(1:knon)
438	fluxlat(1:knon) = -1. * fluxlat(1:knon)
439
440	! evap = -1. * evap
441
442	IF (debut) lrestart_read = .FALSE.
443
444	IF (debut) CALL Finalize_surf_para
445
446	END SUBROUTINE surf_land_orchidee
447	!
448	!****************************************************************************************
449	!
450	SUBROUTINE Init_orchidee_index(knon,knindex,offset,ktindex)
451	USE mod_surf_para
452	USE mod_grid_phy_lmdz
453
454	INTEGER,INTENT(IN) :: knon
455	INTEGER,INTENT(IN) :: knindex(klon)
456	INTEGER,INTENT(OUT) :: offset
457	INTEGER,INTENT(OUT) :: ktindex(klon)
458
459	INTEGER :: ktindex_glo(knon_glo)
460	INTEGER :: offset_para(0:omp_size*mpi_size-1)
461	INTEGER :: LastPoint
462	INTEGER :: task
463
464	ktindex(1:knon)=knindex(1:knon)+(klon_mpi_begin-1)+(klon_omp_begin-1)+nbp_lon-1
465
466	CALL gather_surf(ktindex(1:knon),ktindex_glo)
467
468	IF (is_mpi_root .AND. is_omp_root) THEN
469	LastPoint=0
470	DO Task=0,mpi_size*omp_size-1
471	IF (knon_glo_para(Task)>0) THEN
472	offset_para(task)= LastPoint-MOD(LastPoint,nbp_lon)
473	LastPoint=ktindex_glo(knon_glo_end_para(task))
474	ENDIF
475	ENDDO
476	ENDIF
477
478	CALL bcast(offset_para)
479
480	offset=offset_para(omp_size*mpi_rank+omp_rank)
481
482	ktindex(1:knon)=ktindex(1:knon)-offset
483
484	END SUBROUTINE Init_orchidee_index
485
486	!
487	!*********************** *************************************************************
488	!
489
490	SUBROUTINE Get_orchidee_communicator(orch_comm,orch_omp_size,orch_omp_rank)
491	USE mod_surf_para
492
493	#ifdef CPP_MPI
494	INCLUDE 'mpif.h'
495	#endif
496
497	INTEGER,INTENT(OUT) :: orch_comm
498	INTEGER,INTENT(OUT) :: orch_omp_size
499	INTEGER,INTENT(OUT) :: orch_omp_rank
500	INTEGER :: color
501	INTEGER :: i,ierr
502	!
503	! End definition
504	!****************************************************************************************
505
506
507	IF (is_omp_root) THEN
508
509	IF (knon_mpi==0) THEN
510	color = 0
511	ELSE
512	color = 1
513	ENDIF
514
515	#ifdef CPP_MPI
516	CALL MPI_COMM_SPLIT(COMM_LMDZ_PHY,color,mpi_rank,orch_comm,ierr)
517	#endif
518
519	ENDIF
520	CALL bcast_omp(orch_comm)
521
522	IF (knon_mpi /= 0) THEN
523	orch_omp_size=0
524	DO i=0,omp_size-1
525	IF (knon_omp_para(i) /=0) THEN
526	orch_omp_size=orch_omp_size+1
527	IF (i==omp_rank) orch_omp_rank=orch_omp_size-1
528	ENDIF
529	ENDDO
530	ENDIF
531
532
533	END SUBROUTINE Get_orchidee_communicator
534	!
535	!****************************************************************************************
536	!
537
538	SUBROUTINE Init_neighbours(knon,neighbours,knindex,pctsrf)
539	USE mod_grid_phy_lmdz
540	USE mod_surf_para
541	INCLUDE "indicesol.h"
542
543	#ifdef CPP_MPI
544	INCLUDE 'mpif.h'
545	#endif
546
547	! Input arguments
548	!****************************************************************************************
549	INTEGER, INTENT(IN) :: knon
550	INTEGER, DIMENSION(klon), INTENT(IN) :: knindex
551	REAL, DIMENSION(klon), INTENT(IN) :: pctsrf
552
553	! Output arguments
554	!****************************************************************************************
555	INTEGER, DIMENSION(knon,8), INTENT(OUT) :: neighbours
556
557	! Local variables
558	!****************************************************************************************
559	INTEGER :: i, igrid, jj, ij, iglob
560	INTEGER :: ierr, ireal, index
561	INTEGER, DIMENSION(8,3) :: off_ini
562	INTEGER, DIMENSION(8) :: offset
563	INTEGER, DIMENSION(nbp_lon,nbp_lat) :: correspond
564	INTEGER, DIMENSION(knon_glo) :: ktindex_glo
565	INTEGER, DIMENSION(knon_glo,8) :: neighbours_glo
566	REAL, DIMENSION(klon_glo) :: pctsrf_glo
567	INTEGER :: ktindex(klon)
568	!
569	! End definition
570	!****************************************************************************************
571
572	ktindex(1:knon)=knindex(1:knon)+(klon_mpi_begin-1)+(klon_omp_begin-1)+nbp_lon-1
573
574	CALL gather_surf(ktindex(1:knon),ktindex_glo)
575	CALL gather(pctsrf,pctsrf_glo)
576
577	IF (is_mpi_root .AND. is_omp_root) THEN
578	neighbours_glo(:,:)=-1
579	! Initialisation des offset
580	!
581	! offset bord ouest
582	off_ini(1,1) = - nbp_lon ; off_ini(2,1) = - nbp_lon + 1 ; off_ini(3,1) = 1
583	off_ini(4,1) = nbp_lon + 1 ; off_ini(5,1) = nbp_lon ; off_ini(6,1) = 2 * nbp_lon - 1
584	off_ini(7,1) = nbp_lon -1 ; off_ini(8,1) = - 1
585	! offset point normal
586	off_ini(1,2) = - nbp_lon ; off_ini(2,2) = - nbp_lon + 1 ; off_ini(3,2) = 1
587	off_ini(4,2) = nbp_lon + 1 ; off_ini(5,2) = nbp_lon ; off_ini(6,2) = nbp_lon - 1
588	off_ini(7,2) = -1 ; off_ini(8,2) = - nbp_lon - 1
589	! offset bord est
590	off_ini(1,3) = - nbp_lon ; off_ini(2,3) = - 2 * nbp_lon + 1 ; off_ini(3,3) = - nbp_lon + 1
591	off_ini(4,3) = 1 ; off_ini(5,3) = nbp_lon ; off_ini(6,3) = nbp_lon - 1
592	off_ini(7,3) = -1 ; off_ini(8,3) = - nbp_lon - 1
593	!
594	!
595	! Attention aux poles
596	!
597	DO igrid = 1, knon_glo
598	index = ktindex_glo(igrid)
599	jj = INT((index - 1)/nbp_lon) + 1
600	ij = index - (jj - 1) * nbp_lon
601	correspond(ij,jj) = igrid
602	ENDDO
603
604	DO igrid = 1, knon_glo
605	iglob = ktindex_glo(igrid)
606
607	IF (MOD(iglob, nbp_lon) == 1) THEN
608	offset = off_ini(:,1)
609	ELSE IF(MOD(iglob, nbp_lon) == 0) THEN
610	offset = off_ini(:,3)
611	ELSE
612	offset = off_ini(:,2)
613	ENDIF
614
615	DO i = 1, 8
616	index = iglob + offset(i)
617	ireal = (MIN(MAX(1, index - nbp_lon + 1), klon_glo))
618	IF (pctsrf_glo(ireal) > EPSFRA) THEN
619	jj = INT((index - 1)/nbp_lon) + 1
620	ij = index - (jj - 1) * nbp_lon
621	neighbours_glo(igrid, i) = correspond(ij, jj)
622	ENDIF
623	ENDDO
624	ENDDO
625
626	ENDIF
627
628	DO i = 1, 8
629	CALL scatter_surf(neighbours_glo(:,i),neighbours(1:knon,i))
630	ENDDO
631	END SUBROUTINE Init_neighbours
632
633	!
634	!****************************************************************************************
635	!
636	#endif
637	END MODULE surf_land_orchidee_mod

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