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surf_land_orchidee_mod.F90 @ 1023

Last change on this file since 1023 was 1023, checked in by lsce, 16 years ago
Bug parallélisme en MPI/OPENMP lorsque pour un grand nombre de CPU, le processus maître et/ou la tâche maitre se retrouve sans points de terre, et sont donc exlus de la liste des domaines dans orchidee. YM
Property svn:eol-style set to `native` Property svn:executable set to ``* Property svn:keywords set to `Author Date Id Revision`
File size: 20.9 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 : 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, &
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) :: swdown_vrai
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	CHARACTER (len = 20) :: modname = 'surf_land_orchidee'
136	CHARACTER (len = 80) :: abort_message
137	LOGICAL,SAVE :: check = .FALSE.
138	!$OMP THREADPRIVATE(check)
139
140	! type de couplage dans sechiba
141	! character (len=10) :: coupling = 'implicit'
142	! drapeaux controlant les appels dans SECHIBA
143	! type(control_type), save :: control_in
144	! Preserved albedo
145	REAL, ALLOCATABLE, DIMENSION(:), SAVE :: albedo_keep, zlev
146	!$OMP THREADPRIVATE(albedo_keep,zlev)
147	! coordonnees geographiques
148	REAL, ALLOCATABLE, DIMENSION(:,:), SAVE :: lalo
149	!$OMP THREADPRIVATE(lalo)
150	! pts voisins
151	INTEGER,ALLOCATABLE, DIMENSION(:,:), SAVE :: neighbours
152	!$OMP THREADPRIVATE(neighbours)
153	! fractions continents
154	REAL,ALLOCATABLE, DIMENSION(:), SAVE :: contfrac
155	!$OMP THREADPRIVATE(contfrac)
156	! resolution de la grille
157	REAL, ALLOCATABLE, DIMENSION (:,:), SAVE :: resolution
158	!$OMP THREADPRIVATE(resolution)
159
160	REAL, ALLOCATABLE, DIMENSION (:,:), SAVE :: lon_scat, lat_scat
161	!$OMP THREADPRIVATE(lon_scat,lat_scat)
162
163	LOGICAL, SAVE :: lrestart_read = .TRUE.
164	!$OMP THREADPRIVATE(lrestart_read)
165	LOGICAL, SAVE :: lrestart_write = .FALSE.
166	!$OMP THREADPRIVATE(lrestart_write)
167
168	REAL, DIMENSION(knon,2) :: albedo_out
169
170	! Pb de nomenclature
171	REAL, DIMENSION(klon) :: petA_orc, peqA_orc
172	REAL, DIMENSION(klon) :: petB_orc, peqB_orc
173	! Pb de correspondances de grilles
174	INTEGER, DIMENSION(:), SAVE, ALLOCATABLE :: ig, jg
175	!$OMP THREADPRIVATE(ig,jg)
176	INTEGER :: indi, indj
177	INTEGER, SAVE, ALLOCATABLE,DIMENSION(:) :: ktindex
178	!$OMP THREADPRIVATE(ktindex)
179
180	! Essai cdrag
181	REAL, DIMENSION(klon) :: cdrag
182	INTEGER,SAVE :: offset
183	!$OMP THREADPRIVATE(offset)
184
185	REAL, DIMENSION(klon_glo) :: rlon_g,rlat_g
186	INTEGER, SAVE :: orch_comm
187	!$OMP THREADPRIVATE(orch_comm)
188
189	REAL, ALLOCATABLE, DIMENSION(:), SAVE :: coastalflow
190	!$OMP THREADPRIVATE(coastalflow)
191	REAL, ALLOCATABLE, DIMENSION(:), SAVE :: riverflow
192	!$OMP THREADPRIVATE(riverflow)
193
194	INTEGER :: orch_omp_rank
195	INTEGER :: orch_omp_size
196	!
197	! Fin definition
198	!****************************************************************************************
199
200	IF (check) WRITE(lunout,*)'Entree ', modname
201
202	! Initialisation
203
204	IF (debut) THEN
205	CALL Init_surf_para(knon)
206	ALLOCATE(ktindex(knon))
207	IF ( .NOT. ALLOCATED(albedo_keep)) THEN
208	!ym ALLOCATE(albedo_keep(klon))
209	!ym bizarre que non alloué en knon precedement
210	ALLOCATE(albedo_keep(knon))
211	ALLOCATE(zlev(knon))
212	ENDIF
213	! Pb de correspondances de grilles
214	ALLOCATE(ig(klon))
215	ALLOCATE(jg(klon))
216	ig(1) = 1
217	jg(1) = 1
218	indi = 0
219	indj = 2
220	DO igrid = 2, klon - 1
221	indi = indi + 1
222	IF ( indi > iim) THEN
223	indi = 1
224	indj = indj + 1
225	ENDIF
226	ig(igrid) = indi
227	jg(igrid) = indj
228	ENDDO
229	ig(klon) = 1
230	jg(klon) = jjm + 1
231
232	IF ((.NOT. ALLOCATED(lalo))) THEN
233	ALLOCATE(lalo(knon,2), stat = error)
234	IF (error /= 0) THEN
235	abort_message='Pb allocation lalo'
236	CALL abort_gcm(modname,abort_message,1)
237	ENDIF
238	ENDIF
239	IF ((.NOT. ALLOCATED(lon_scat))) THEN
240	ALLOCATE(lon_scat(iim,jjm+1), stat = error)
241	IF (error /= 0) THEN
242	abort_message='Pb allocation lon_scat'
243	CALL abort_gcm(modname,abort_message,1)
244	ENDIF
245	ENDIF
246	IF ((.NOT. ALLOCATED(lat_scat))) THEN
247	ALLOCATE(lat_scat(iim,jjm+1), stat = error)
248	IF (error /= 0) THEN
249	abort_message='Pb allocation lat_scat'
250	CALL abort_gcm(modname,abort_message,1)
251	ENDIF
252	ENDIF
253	lon_scat = 0.
254	lat_scat = 0.
255	DO igrid = 1, knon
256	index = knindex(igrid)
257	lalo(igrid,2) = rlon(index)
258	lalo(igrid,1) = rlat(index)
259	ENDDO
260
261
262
263	CALL Gather(rlon,rlon_g)
264	CALL Gather(rlat,rlat_g)
265
266	IF (is_mpi_root) THEN
267	index = 1
268	DO jj = 2, jjm
269	DO ij = 1, iim
270	index = index + 1
271	lon_scat(ij,jj) = rlon_g(index)
272	lat_scat(ij,jj) = rlat_g(index)
273	ENDDO
274	ENDDO
275	lon_scat(:,1) = lon_scat(:,2)
276	lat_scat(:,1) = rlat_g(1)
277	lon_scat(:,jjm+1) = lon_scat(:,2)
278	lat_scat(:,jjm+1) = rlat_g(klon_glo)
279	ENDIF
280
281	CALL bcast(lon_scat)
282	CALL bcast(lat_scat)
283	!
284	! Allouer et initialiser le tableau des voisins et des fraction de continents
285	!
286	IF ( (.NOT.ALLOCATED(neighbours))) THEN
287	ALLOCATE(neighbours(knon,8), stat = error)
288	IF (error /= 0) THEN
289	abort_message='Pb allocation neighbours'
290	CALL abort_gcm(modname,abort_message,1)
291	ENDIF
292	ENDIF
293	neighbours = -1.
294	IF (( .NOT. ALLOCATED(contfrac))) THEN
295	ALLOCATE(contfrac(knon), stat = error)
296	IF (error /= 0) THEN
297	abort_message='Pb allocation contfrac'
298	CALL abort_gcm(modname,abort_message,1)
299	ENDIF
300	ENDIF
301
302	DO igrid = 1, knon
303	ireal = knindex(igrid)
304	contfrac(igrid) = pctsrf(ireal,is_ter)
305	ENDDO
306
307
308	CALL Init_neighbours(knon,neighbours,knindex,pctsrf(:,is_ter))
309
310	!
311	! Allocation et calcul resolutions
312	IF ( (.NOT.ALLOCATED(resolution))) THEN
313	ALLOCATE(resolution(knon,2), stat = error)
314	IF (error /= 0) THEN
315	abort_message='Pb allocation resolution'
316	CALL abort_gcm(modname,abort_message,1)
317	ENDIF
318	ENDIF
319	DO igrid = 1, knon
320	ij = knindex(igrid)
321	resolution(igrid,1) = cuphy(ij)
322	resolution(igrid,2) = cvphy(ij)
323	ENDDO
324
325	ALLOCATE(coastalflow(klon), stat = error)
326	IF (error /= 0) THEN
327	abort_message='Pb allocation coastalflow'
328	CALL abort_gcm(modname,abort_message,1)
329	ENDIF
330
331	ALLOCATE(riverflow(klon), stat = error)
332	IF (error /= 0) THEN
333	abort_message='Pb allocation riverflow'
334	CALL abort_gcm(modname,abort_message,1)
335	ENDIF
336
337	ENDIF ! (fin debut)
338
339	!
340	! Appel a la routine sols continentaux
341	!
342	IF (lafin) lrestart_write = .TRUE.
343	IF (check) WRITE(lunout,*)'lafin ',lafin,lrestart_write
344
345	petA_orc(1:knon) = petBcoef(1:knon) * dtime
346	petB_orc(1:knon) = petAcoef(1:knon)
347	peqA_orc(1:knon) = peqBcoef(1:knon) * dtime
348	peqB_orc(1:knon) = peqAcoef(1:knon)
349
350	cdrag = 0.
351	cdrag(1:knon) = tq_cdrag(1:knon)
352
353	! zlev(1:knon) = (100.plev(1:knon))/((ps(1:knon)/287.05temp_air(1:knon))*9.80665)
354	zlev(1:knon) = (100.plev(1:knon))/((ps(1:knon)/RDtemp_air(1:knon))*RG)
355
356
357	! PF et PASB
358	! where(cdrag > 0.01)
359	! cdrag = 0.01
360	! endwhere
361	! write(,)'Cdrag = ',minval(cdrag),maxval(cdrag)
362
363
364	IF (debut) THEN
365	CALL Init_orchidee_index(knon,knindex,offset,ktindex)
366	CALL Get_orchidee_communicator(orch_comm,orch_omp_size,orch_omp_rank)
367	CALL Init_synchro_omp
368
369	IF (knon > 0) THEN
370	CALL Init_intersurf(nbp_lon,nbp_lat,knon,ktindex,offset,orch_omp_size,orch_omp_rank,orch_comm)
371	ENDIF
372
373
374	IF (knon > 0) THEN
375
376	CALL intersurf_main (itime+itau_phy-1, iim, jjm+1, knon, ktindex, dtime, &
377	lrestart_read, lrestart_write, lalo, &
378	contfrac, neighbours, resolution, date0, &
379	zlev, u1_lay, v1_lay, spechum, temp_air, epot_air, ccanopy, &
380	cdrag, petA_orc, peqA_orc, petB_orc, peqB_orc, &
381	precip_rain, precip_snow, lwdown, swnet, swdown, ps, &
382	evap, fluxsens, fluxlat, coastalflow, riverflow, &
383	tsol_rad, tsurf_new, qsurf, albedo_out, emis_new, z0_new, &
384	lon_scat, lat_scat)
385
386	ENDIF
387
388	CALL Synchro_omp
389
390	albedo_keep(1:knon) = (albedo_out(1:knon,1)+albedo_out(1:knon,2))/2.
391
392	ENDIF
393
394
395	! swdown_vrai(1:knon) = swnet(1:knon)/(1. - albedo_keep(1:knon))
396	swdown_vrai(1:knon) = swdown(1:knon)
397
398	IF (knon > 0) THEN
399
400	CALL intersurf_main (itime+itau_phy, iim, jjm+1, knon, ktindex, dtime, &
401	lrestart_read, lrestart_write, lalo, &
402	contfrac, neighbours, resolution, date0, &
403	zlev, u1_lay(1:knon), v1_lay(1:knon), spechum(1:knon), temp_air(1:knon), epot_air(1:knon), ccanopy(1:knon), &
404	cdrag(1:knon), petA_orc(1:knon), peqA_orc(1:knon), petB_orc(1:knon), peqB_orc(1:knon), &
405	precip_rain(1:knon), precip_snow(1:knon), lwdown(1:knon), swnet(1:knon), swdown_vrai(1:knon), ps(1:knon), &
406	evap(1:knon), fluxsens(1:knon), fluxlat(1:knon), coastalflow(1:knon), riverflow(1:knon), &
407	tsol_rad(1:knon), tsurf_new(1:knon), qsurf(1:knon), albedo_out(1:knon,:), emis_new(1:knon), z0_new(1:knon), &
408	lon_scat, lat_scat)
409
410	ENDIF
411
412	CALL Synchro_omp
413
414	albedo_keep(1:knon) = (albedo_out(1:knon,1)+albedo_out(1:knon,2))/2.
415
416	!* Send to coupler
417	!
418	IF (type_ocean=='couple') THEN
419	CALL cpl_send_land_fields(itime, knon, knindex, &
420	riverflow, coastalflow)
421	ENDIF
422
423	alb1_new(1:knon) = albedo_out(1:knon,1)
424	alb2_new(1:knon) = albedo_out(1:knon,2)
425
426	! Convention orchidee: positif vers le haut
427	fluxsens(1:knon) = -1. * fluxsens(1:knon)
428	fluxlat(1:knon) = -1. * fluxlat(1:knon)
429
430	! evap = -1. * evap
431
432	IF (debut) lrestart_read = .FALSE.
433
434	IF (debut) CALL Finalize_surf_para
435
436	END SUBROUTINE surf_land_orchidee
437	!
438	!****************************************************************************************
439	!
440	SUBROUTINE Init_orchidee_index(knon,knindex,offset,ktindex)
441	USE mod_surf_para
442	USE mod_grid_phy_lmdz
443
444	INTEGER,INTENT(IN) :: knon
445	INTEGER,INTENT(IN) :: knindex(klon)
446	INTEGER,INTENT(OUT) :: offset
447	INTEGER,INTENT(OUT) :: ktindex(klon)
448
449	INTEGER :: ktindex_glo(knon_glo)
450	INTEGER :: offset_para(0:omp_size*mpi_size-1)
451	INTEGER :: LastPoint
452	INTEGER :: task
453
454	ktindex(1:knon)=knindex(1:knon)+(klon_mpi_begin-1)+(klon_omp_begin-1)+nbp_lon-1
455
456	CALL gather_surf(ktindex(1:knon),ktindex_glo)
457
458	IF (is_mpi_root .AND. is_omp_root) THEN
459	LastPoint=0
460	DO Task=0,mpi_size*omp_size-1
461	IF (knon_glo_para(Task)>0) THEN
462	offset_para(task)= LastPoint-MOD(LastPoint,nbp_lon)
463	LastPoint=ktindex_glo(knon_glo_end_para(task))
464	ENDIF
465	ENDDO
466	ENDIF
467
468	CALL bcast(offset_para)
469
470	offset=offset_para(omp_size*mpi_rank+omp_rank)
471
472	ktindex(1:knon)=ktindex(1:knon)-offset
473
474	END SUBROUTINE Init_orchidee_index
475
476	!
477	!*********************** *************************************************************
478	!
479
480	SUBROUTINE Get_orchidee_communicator(orch_comm,orch_omp_size,orch_omp_rank)
481	USE mod_surf_para
482
483	#ifdef CPP_MPI
484	INCLUDE 'mpif.h'
485	#endif
486
487	INTEGER,INTENT(OUT) :: orch_comm
488	INTEGER,INTENT(OUT) :: orch_omp_size
489	INTEGER,INTENT(OUT) :: orch_omp_rank
490	INTEGER :: color
491	INTEGER :: i,ierr
492	!
493	! End definition
494	!****************************************************************************************
495
496
497	IF (is_omp_root) THEN
498
499	IF (knon_mpi==0) THEN
500	color = 0
501	ELSE
502	color = 1
503	ENDIF
504
505	#ifdef CPP_MPI
506	CALL MPI_COMM_SPLIT(COMM_LMDZ_PHY,color,mpi_rank,orch_comm,ierr)
507	#endif
508
509	ENDIF
510	CALL bcast_omp(orch_comm)
511
512	IF (knon_mpi /= 0) THEN
513	orch_omp_size=0
514	DO i=0,omp_size-1
515	IF (knon_omp_para(i) /=0) THEN
516	orch_omp_size=orch_omp_size+1
517	IF (i==omp_rank) orch_omp_rank=orch_omp_size-1
518	ENDIF
519	ENDDO
520	ENDIF
521
522
523	END SUBROUTINE Get_orchidee_communicator
524	!
525	!****************************************************************************************
526	!
527
528	SUBROUTINE Init_neighbours(knon,neighbours,knindex,pctsrf)
529	USE mod_grid_phy_lmdz
530	USE mod_surf_para
531	INCLUDE "indicesol.h"
532
533	#ifdef CPP_MPI
534	INCLUDE 'mpif.h'
535	#endif
536
537	! Input arguments
538	!****************************************************************************************
539	INTEGER, INTENT(IN) :: knon
540	INTEGER, DIMENSION(klon), INTENT(IN) :: knindex
541	REAL, DIMENSION(klon), INTENT(IN) :: pctsrf
542
543	! Output arguments
544	!****************************************************************************************
545	INTEGER, DIMENSION(knon,8), INTENT(OUT) :: neighbours
546
547	! Local variables
548	!****************************************************************************************
549	INTEGER :: i, igrid, jj, ij, iglob
550	INTEGER :: ierr, ireal, index
551	INTEGER, DIMENSION(8,3) :: off_ini
552	INTEGER, DIMENSION(8) :: offset
553	INTEGER, DIMENSION(nbp_lon,nbp_lat) :: correspond
554	INTEGER, DIMENSION(knon_glo) :: ktindex_glo
555	INTEGER, DIMENSION(knon_glo,8) :: neighbours_glo
556	REAL, DIMENSION(klon_glo) :: pctsrf_glo
557	INTEGER :: ktindex(klon)
558	!
559	! End definition
560	!****************************************************************************************
561
562	ktindex(1:knon)=knindex(1:knon)+(klon_mpi_begin-1)+(klon_omp_begin-1)+nbp_lon-1
563
564	CALL gather_surf(ktindex(1:knon),ktindex_glo)
565	CALL gather(pctsrf,pctsrf_glo)
566
567	IF (is_mpi_root .AND. is_omp_root) THEN
568	neighbours_glo(:,:)=-1
569	! Initialisation des offset
570	!
571	! offset bord ouest
572	off_ini(1,1) = - nbp_lon ; off_ini(2,1) = - nbp_lon + 1 ; off_ini(3,1) = 1
573	off_ini(4,1) = nbp_lon + 1 ; off_ini(5,1) = nbp_lon ; off_ini(6,1) = 2 * nbp_lon - 1
574	off_ini(7,1) = nbp_lon -1 ; off_ini(8,1) = - 1
575	! offset point normal
576	off_ini(1,2) = - nbp_lon ; off_ini(2,2) = - nbp_lon + 1 ; off_ini(3,2) = 1
577	off_ini(4,2) = nbp_lon + 1 ; off_ini(5,2) = nbp_lon ; off_ini(6,2) = nbp_lon - 1
578	off_ini(7,2) = -1 ; off_ini(8,2) = - nbp_lon - 1
579	! offset bord est
580	off_ini(1,3) = - nbp_lon ; off_ini(2,3) = - 2 * nbp_lon + 1 ; off_ini(3,3) = - nbp_lon + 1
581	off_ini(4,3) = 1 ; off_ini(5,3) = nbp_lon ; off_ini(6,3) = nbp_lon - 1
582	off_ini(7,3) = -1 ; off_ini(8,3) = - nbp_lon - 1
583	!
584	!
585	! Attention aux poles
586	!
587	DO igrid = 1, knon_glo
588	index = ktindex_glo(igrid)
589	jj = INT((index - 1)/nbp_lon) + 1
590	ij = index - (jj - 1) * nbp_lon
591	correspond(ij,jj) = igrid
592	ENDDO
593
594	DO igrid = 1, knon_glo
595	iglob = ktindex_glo(igrid)
596
597	IF (MOD(iglob, nbp_lon) == 1) THEN
598	offset = off_ini(:,1)
599	ELSE IF(MOD(iglob, nbp_lon) == 0) THEN
600	offset = off_ini(:,3)
601	ELSE
602	offset = off_ini(:,2)
603	ENDIF
604
605	DO i = 1, 8
606	index = iglob + offset(i)
607	ireal = (MIN(MAX(1, index - nbp_lon + 1), klon_glo))
608	IF (pctsrf_glo(ireal) > EPSFRA) THEN
609	jj = INT((index - 1)/nbp_lon) + 1
610	ij = index - (jj - 1) * nbp_lon
611	neighbours_glo(igrid, i) = correspond(ij, jj)
612	ENDIF
613	ENDDO
614	ENDDO
615
616	ENDIF
617
618	DO i = 1, 8
619	CALL scatter_surf(neighbours_glo(:,i),neighbours(1:knon,i))
620	ENDDO
621	END SUBROUTINE Init_neighbours
622
623	!
624	!****************************************************************************************
625	!
626
627	#endif
628
629	END MODULE surf_land_orchidee_mod

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