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surf_land_orchidee_mod.F90 @ 912

Last change on this file since 912 was 912, checked in by (none), 16 years ago
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Line
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 ORCHIDEE version 1.9 or earlier compiled in sequential mode(without preprocessing flag CPP_PARA)
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	! Interface for ORCHIDEE version 1.9 compiled in parallel mode(with preprocessing flag CPP_PARA)
386	CALL intersurf_main (itime+itau_phy-1, iim, jjm+1, offset, knon, ktindex, &
387	orch_comm, dtime, lrestart_read, lrestart_write, lalo, &
388	contfrac, neighbours, resolution, date0, &
389	zlev, u1_lay(1:knon), v1_lay(1:knon), spechum(1:knon), temp_air(1:knon), epot_air(1:knon), ccanopy(1:knon), &
390	cdrag(1:knon), petA_orc(1:knon), peqA_orc(1:knon), petB_orc(1:knon), peqB_orc(1:knon), &
391	precip_rain(1:knon), precip_snow(1:knon), lwdown(1:knon), swnet(1:knon), swdown(1:knon), ps(1:knon), &
392	evap(1:knon), fluxsens(1:knon), fluxlat(1:knon), coastalflow(1:knon), riverflow(1:knon), &
393	tsol_rad(1:knon), tsurf_new(1:knon), qsurf(1:knon), albedo_out(1:knon,:), emis_new(1:knon), z0_new(1:knon), &
394	lon_scat, lat_scat)
395	#endif
396
397	ENDIF
398
399	albedo_keep(1:knon) = (albedo_out(1:knon,1)+albedo_out(1:knon,2))/2.
400
401	ENDIF
402
403	! swdown_vrai(1:knon) = swnet(1:knon)/(1. - albedo_keep(1:knon))
404	swdown_vrai(1:knon) = swdown(1:knon)
405
406	IF (knon /=0) THEN
407
408	#ifdef ORC_PREPAR
409	! Interface for ORCHIDEE version 1.9 or earlier compiled in sequential mode(without preprocessing flag CPP_PARA)
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, v1_lay, spechum, temp_air, epot_air, ccanopy, &
414	cdrag, petA_orc, peqA_orc, petB_orc, peqB_orc, &
415	precip_rain, precip_snow, lwdown, swnet, swdown_vrai, ps, &
416	evap, fluxsens, fluxlat, coastalflow, riverflow, &
417	tsol_rad, tsurf_new, qsurf, albedo_out, emis_new, z0_new, &
418	lon_scat, lat_scat)
419
420	#else
421	! Interface for ORCHIDEE version 1.9 compiled in parallel mode(with preprocessing flag CPP_PARA)
422	CALL intersurf_main (itime+itau_phy, iim, jjm+1,offset, knon, ktindex, &
423	orch_comm,dtime, lrestart_read, lrestart_write, lalo, &
424	contfrac, neighbours, resolution, date0, &
425	zlev, u1_lay(1:knon), v1_lay(1:knon), spechum(1:knon), temp_air(1:knon), epot_air(1:knon), ccanopy(1:knon), &
426	cdrag(1:knon), petA_orc(1:knon), peqA_orc(1:knon), petB_orc(1:knon), peqB_orc(1:knon), &
427	precip_rain(1:knon), precip_snow(1:knon), lwdown(1:knon), swnet(1:knon), swdown_vrai(1:knon), ps(1:knon), &
428	evap(1:knon), fluxsens(1:knon), fluxlat(1:knon), coastalflow(1:knon), riverflow(1:knon), &
429	tsol_rad(1:knon), tsurf_new(1:knon), qsurf(1:knon), albedo_out(1:knon,:), emis_new(1:knon), z0_new(1:knon), &
430	lon_scat, lat_scat)
431	#endif
432
433	ENDIF
434
435	albedo_keep(1:knon) = (albedo_out(1:knon,1)+albedo_out(1:knon,2))/2.
436
437	!* Send to coupler
438	!
439	IF (ocean=='couple') THEN
440	CALL cpl_send_land_fields(itime, knon, knindex, &
441	riverflow, coastalflow)
442	ENDIF
443
444	alb_new(1:knon) = albedo_out(1:knon,1)
445	alblw(1:knon) = albedo_out(1:knon,2)
446
447	! Convention orchidee: positif vers le haut
448	fluxsens(1:knon) = -1. * fluxsens(1:knon)
449	fluxlat(1:knon) = -1. * fluxlat(1:knon)
450
451	! evap = -1. * evap
452
453	IF (debut) lrestart_read = .FALSE.
454
455	END SUBROUTINE surf_land_orchidee
456	!
457	!****************************************************************************************
458	!
459	SUBROUTINE Init_orchidee_index(knon,orch_comm,knindex,offset,ktindex)
460
461	INCLUDE "dimensions.h"
462
463	#ifdef CPP_PARA
464	INCLUDE 'mpif.h'
465	#endif
466
467
468	! Input arguments
469	!****************************************************************************************
470	INTEGER, INTENT(IN) :: knon
471	INTEGER, INTENT(IN) :: orch_comm
472	INTEGER, DIMENSION(klon), INTENT(IN) :: knindex
473
474	! Output arguments
475	!****************************************************************************************
476	INTEGER, INTENT(OUT) :: offset
477	INTEGER, DIMENSION(knon), INTENT(OUT) :: ktindex
478
479	! Local varables
480	!****************************************************************************************
481	#ifdef CPP_PARA
482	INTEGER, DIMENSION(MPI_STATUS_SIZE) :: status
483	#endif
484
485	INTEGER :: MyLastPoint
486	INTEGER :: LastPoint
487	INTEGER :: mpi_rank_orch
488	INTEGER :: mpi_size_orch
489	INTEGER :: ierr
490	!
491	! End definition
492	!****************************************************************************************
493
494	MyLastPoint=klon_mpi_begin-1+knindex(knon)+iim-1
495
496	IF (is_parallel) THEN
497	#ifdef CPP_PARA
498	CALL MPI_COMM_SIZE(orch_comm,mpi_size_orch,ierr)
499	CALL MPI_COMM_RANK(orch_comm,mpi_rank_orch,ierr)
500	#endif
501	ELSE
502	mpi_rank_orch=0
503	mpi_size_orch=1
504	ENDIF
505
506	IF (is_parallel) THEN
507	IF (mpi_rank_orch /= 0) THEN
508	#ifdef CPP_PARA
509	CALL MPI_RECV(LastPoint,1,MPI_INTEGER,mpi_rank_orch-1,1234,orch_comm,status,ierr)
510	#endif
511	ENDIF
512
513	IF (mpi_rank_orch /= mpi_size_orch-1) THEN
514	#ifdef CPP_PARA
515	CALL MPI_SEND(MyLastPoint,1,MPI_INTEGER,mpi_rank_orch+1,1234,orch_comm,ierr)
516	#endif
517	ENDIF
518	ENDIF
519
520	IF (mpi_rank_orch == 0) THEN
521	offset=0
522	ELSE
523	offset=LastPoint-MOD(LastPoint,iim)
524	ENDIF
525
526	ktindex(1:knon)=knindex(1:knon)+(klon_mpi_begin+iim-1)-offset-1
527
528
529	END SUBROUTINE Init_orchidee_index
530	!
531	!****************************************************************************************
532	!
533	SUBROUTINE Get_orchidee_communicator(knon,orch_comm)
534
535	#ifdef CPP_PARA
536	INCLUDE 'mpif.h'
537	#endif
538
539
540	INTEGER,INTENT(IN) :: knon
541	INTEGER,INTENT(OUT) :: orch_comm
542
543	INTEGER :: color
544	INTEGER :: ierr
545	!
546	! End definition
547	!****************************************************************************************
548
549	IF (knon==0) THEN
550	color = 0
551	ELSE
552	color = 1
553	ENDIF
554
555	#ifdef CPP_PARA
556	CALL MPI_COMM_SPLIT(COMM_LMDZ_PHY,color,mpi_rank,orch_comm,ierr)
557	#endif
558
559	END SUBROUTINE Get_orchidee_communicator
560	!
561	!****************************************************************************************
562	!
563	SUBROUTINE Init_neighbours(knon,neighbours,ktindex,pctsrf)
564
565	INCLUDE "indicesol.h"
566	INCLUDE "dimensions.h"
567	#ifdef CPP_PARA
568	INCLUDE 'mpif.h'
569	#endif
570
571	! Input arguments
572	!****************************************************************************************
573	INTEGER, INTENT(IN) :: knon
574	INTEGER, DIMENSION(klon), INTENT(IN) :: ktindex
575	REAL, DIMENSION(klon), INTENT(IN) :: pctsrf
576
577	! Output arguments
578	!****************************************************************************************
579	INTEGER, DIMENSION(knon,8), INTENT(OUT) :: neighbours
580
581	! Local variables
582	!****************************************************************************************
583	INTEGER :: knon_g
584	INTEGER :: i, igrid, jj, ij, iglob
585	INTEGER :: ierr, ireal, index
586	INTEGER, DIMENSION(0:mpi_size-1) :: knon_nb
587	INTEGER, DIMENSION(0:mpi_size-1) :: displs
588	INTEGER, DIMENSION(8,3) :: off_ini
589	INTEGER, DIMENSION(8) :: offset
590	INTEGER, DIMENSION(knon) :: ktindex_p
591	INTEGER, DIMENSION(iim,jjm+1) :: correspond
592	INTEGER, ALLOCATABLE, DIMENSION(:) :: ktindex_g
593	INTEGER, ALLOCATABLE, DIMENSION(:,:) :: neighbours_g
594	REAL, DIMENSION(klon_glo) :: pctsrf_g
595
596	!
597	! End definition
598	!****************************************************************************************
599
600	IF (is_sequential) THEN
601	knon_nb(:)=knon
602	ELSE
603
604	#ifdef CPP_PARA
605	CALL MPI_GATHER(knon,1,MPI_INTEGER,knon_nb,1,MPI_INTEGER,0,COMM_LMDZ_PHY,ierr)
606	#endif
607
608	ENDIF
609
610	IF (is_mpi_root) THEN
611	knon_g=SUM(knon_nb(:))
612	ALLOCATE(ktindex_g(knon_g))
613	ALLOCATE(neighbours_g(knon_g,8))
614	neighbours_g(:,:)=-1
615	displs(0)=0
616	DO i=1,mpi_size-1
617	displs(i)=displs(i-1)+knon_nb(i-1)
618	ENDDO
619	ENDIF
620
621	ktindex_p(1:knon)=ktindex(1:knon)+klon_mpi_begin-1+iim-1
622
623	IF (is_sequential) THEN
624	ktindex_g(:)=ktindex_p(:)
625	ELSE
626
627	#ifdef CPP_PARA
628	CALL MPI_GATHERV(ktindex_p,knon,MPI_INTEGER,ktindex_g,knon_nb,&
629	displs,MPI_INTEGER,0,COMM_LMDZ_PHY,ierr)
630	#endif
631
632	ENDIF
633
634	CALL Gather(pctsrf,pctsrf_g)
635
636	IF (is_mpi_root) THEN
637	! Initialisation des offset
638	!
639	! offset bord ouest
640	off_ini(1,1) = - iim ; off_ini(2,1) = - iim + 1; off_ini(3,1) = 1
641	off_ini(4,1) = iim + 1; off_ini(5,1) = iim ; off_ini(6,1) = 2 * iim - 1
642	off_ini(7,1) = iim -1 ; off_ini(8,1) = - 1
643	! offset point normal
644	off_ini(1,2) = - iim ; off_ini(2,2) = - iim + 1; off_ini(3,2) = 1
645	off_ini(4,2) = iim + 1; off_ini(5,2) = iim ; off_ini(6,2) = iim - 1
646	off_ini(7,2) = -1 ; off_ini(8,2) = - iim - 1
647	! offset bord est
648	off_ini(1,3) = - iim; off_ini(2,3) = - 2 * iim + 1; off_ini(3,3) = - iim + 1
649	off_ini(4,3) = 1 ; off_ini(5,3) = iim ; off_ini(6,3) = iim - 1
650	off_ini(7,3) = -1 ; off_ini(8,3) = - iim - 1
651	!
652	!
653	! Attention aux poles
654	!
655	DO igrid = 1, knon_g
656	index = ktindex_g(igrid)
657	jj = INT((index - 1)/iim) + 1
658	ij = index - (jj - 1) * iim
659	correspond(ij,jj) = igrid
660	ENDDO
661
662	DO igrid = 1, knon_g
663	iglob = ktindex_g(igrid)
664	IF (MOD(iglob, iim) == 1) THEN
665	offset = off_ini(:,1)
666	ELSE IF(MOD(iglob, iim) == 0) THEN
667	offset = off_ini(:,3)
668	ELSE
669	offset = off_ini(:,2)
670	ENDIF
671	DO i = 1, 8
672	index = iglob + offset(i)
673	ireal = (MIN(MAX(1, index - iim + 1), klon_glo))
674	IF (pctsrf_g(ireal) > EPSFRA) THEN
675	jj = INT((index - 1)/iim) + 1
676	ij = index - (jj - 1) * iim
677	neighbours_g(igrid, i) = correspond(ij, jj)
678	ENDIF
679	ENDDO
680	ENDDO
681
682	ENDIF
683
684	DO i=1,8
685	IF (is_sequential) THEN
686	neighbours(:,i)=neighbours_g(:,i)
687	ELSE
688	#ifdef CPP_PARA
689	CALL MPI_SCATTERV(neighbours_g(:,i),knon_nb,displs,MPI_INTEGER,neighbours(:,i),knon,MPI_INTEGER,0,COMM_LMDZ_PHY,ierr)
690	#endif
691	ENDIF
692	ENDDO
693
694	END SUBROUTINE Init_neighbours
695	!
696	!****************************************************************************************
697	!
698
699	#endif
700
701	END MODULE surf_land_orchidee_mod

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