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readaerosol.F90 @ 2532

Last change on this file since 2532 was 1483, checked in by jghattas, 14 years ago

Added option aer_type=mix1 and mix2

mix1: as aer_type=scenario for SO4 and aer_type=annuel for the other aerosols.
mix2: as aer_type=scenario for SO4 and aer_type=preind for the other aerosols.
For these 2 options 2 files are read : so4.runxxxx.nc for SO4 and aerosolsxxxx.nc the other aerosols.

Bug fix for using old sulfate data(files AR4 from O Boucher) : moved test for number of time steps read from file but not available in old file format.

Property svn:eol-style set to native
Property svn:keywords set to Author Date Id Revision

File size: 23.9 KB

Line
1	! $Id: readaerosol.F90 1483 2011-02-09 15:21:55Z dcugnet $
2	!
3	MODULE readaerosol_mod
4
5	REAL, SAVE :: not_valid=-333.
6
7	CONTAINS
8
9	SUBROUTINE readaerosol(name_aero, type, filename, iyr_in, klev_src, pt_ap, pt_b, pt_out, psurf, load)
10
11	!****************************************************************************************
12	! This routine will read the aersosol from file.
13	!
14	! Read a year data with get_aero_fromfile depending on aer_type :
15	! - actuel : read year 1980
16	! - preind : read natural data
17	! - scenario : read one or two years and do eventually linare time interpolation
18	!
19	! Return pointer, pt_out, to the year read or result from interpolation
20	!****************************************************************************************
21	USE dimphy
22
23	IMPLICIT NONE
24
25	INCLUDE "iniprint.h"
26
27	! Input arguments
28	CHARACTER(len=7), INTENT(IN) :: name_aero
29	CHARACTER(len=*), INTENT(IN) :: type ! actuel, annuel, scenario or preind
30	CHARACTER(len=8), INTENT(IN) :: filename
31	INTEGER, INTENT(IN) :: iyr_in
32
33	! Output
34	INTEGER, INTENT(OUT) :: klev_src
35	REAL, POINTER, DIMENSION(:) :: pt_ap ! Pointer for describing the vertical levels
36	REAL, POINTER, DIMENSION(:) :: pt_b ! Pointer for describing the vertical levels
37	REAL, POINTER, DIMENSION(:,:,:) :: pt_out ! The massvar distributions, DIMENSION(klon, klev_src, 12)
38	REAL, DIMENSION(klon,12), INTENT(OUT) :: psurf ! Surface pression for 12 months
39	REAL, DIMENSION(klon,12), INTENT(OUT) :: load ! Aerosol mass load in each column for 12 months
40
41	! Local variables
42	CHARACTER(len=4) :: cyear
43	REAL, POINTER, DIMENSION(:,:,:) :: pt_2
44	REAL, DIMENSION(klon,12) :: psurf2, load2
45	REAL :: p0 ! Reference pressure
46	INTEGER :: iyr1, iyr2, klev_src2
47	INTEGER :: it, k, i
48	LOGICAL, PARAMETER :: lonlyone=.FALSE.
49
50	!****************************************************************************************
51	! Read data depending on aer_type
52	!
53	!****************************************************************************************
54
55	IF (type == 'actuel') THEN
56	! Read and return data for year 1980
57	!****************************************************************************************
58	cyear='1980'
59	! get_aero_fromfile returns pt_out allocated and initialized with data for 12 month
60	! pt_out has dimensions (klon, klev_src, 12)
61	CALL get_aero_fromfile(name_aero, cyear, filename, klev_src, pt_ap, pt_b, p0, pt_out, psurf, load)
62
63
64	ELSE IF (type == 'preind') THEN
65	! Read and return data from file with suffix .nat
66	!****************************************************************************************
67	cyear='.nat'
68	! get_aero_fromfile returns pt_out allocated and initialized with data for 12 month
69	! pt_out has dimensions (klon, klev_src, 12)
70	CALL get_aero_fromfile(name_aero, cyear, filename, klev_src, pt_ap, pt_b, p0, pt_out, psurf, load)
71
72	ELSE IF (type == 'annuel') THEN
73	! Read and return data from scenario annual files
74	!****************************************************************************************
75	WRITE(cyear,'(I4)') iyr_in
76	WRITE(lunout,*) 'get_aero 3 iyr_in=', iyr_in,' ',cyear
77	! get_aero_fromfile returns pt_out allocated and initialized with data for nbr_tsteps month
78	! pt_out has dimensions (klon, klev_src, 12)
79	CALL get_aero_fromfile(name_aero, cyear, filename, klev_src, pt_ap, pt_b, p0, pt_out, psurf, load)
80
81	ELSE IF (type == 'scenario') THEN
82	! Read data depending on actual year and interpolate if necessary
83	!****************************************************************************************
84	IF (iyr_in .LT. 1850) THEN
85	cyear='.nat'
86	WRITE(lunout,*) 'get_aero 1 iyr_in=', iyr_in,' ',cyear
87	! get_aero_fromfile returns pt_out allocated and initialized with data for 12 month
88	! pt_out has dimensions (klon, klev_src, 12)
89	CALL get_aero_fromfile(name_aero, cyear, filename, klev_src, pt_ap, pt_b, p0, pt_out, psurf, load)
90
91	ELSE IF (iyr_in .GE. 2100) THEN
92	cyear='2100'
93	WRITE(lunout,*) 'get_aero 2 iyr_in=', iyr_in,' ',cyear
94	! get_aero_fromfile returns pt_out allocated and initialized with data for 12 month
95	! pt_out has dimensions (klon, klev_src, 12)
96	CALL get_aero_fromfile(name_aero, cyear, filename, klev_src, pt_ap, pt_b, p0, pt_out, psurf, load)
97
98	ELSE
99	! Read data from 2 decades and interpolate to actual year
100	! a) from actual 10-yr-period
101	IF (iyr_in.LT.1900) THEN
102	iyr1 = 1850
103	iyr2 = 1900
104	ELSE IF (iyr_in.GE.1900.AND.iyr_in.LT.1920) THEN
105	iyr1 = 1900
106	iyr2 = 1920
107	ELSE
108	iyr1 = INT(iyr_in/10)*10
109	iyr2 = INT(1+iyr_in/10)*10
110	ENDIF
111
112	WRITE(cyear,'(I4)') iyr1
113	WRITE(lunout,*) 'get_aero 3 iyr_in=', iyr_in,' ',cyear
114	! get_aero_fromfile returns pt_out allocated and initialized with data for 12 month
115	! pt_out has dimensions (klon, klev_src, 12)
116	CALL get_aero_fromfile(name_aero, cyear, filename, klev_src, pt_ap, pt_b, p0, pt_out, psurf, load)
117
118	! If to read two decades:
119	IF (.NOT.lonlyone) THEN
120
121	! b) from the next following one
122	WRITE(cyear,'(I4)') iyr2
123	WRITE(lunout,*) 'get_aero 4 iyr_in=', iyr_in,' ',cyear
124
125	NULLIFY(pt_2)
126	! get_aero_fromfile returns pt_2 allocated and initialized with data for 12 month
127	! pt_2 has dimensions (klon, klev_src, 12)
128	CALL get_aero_fromfile(name_aero, cyear, filename, klev_src2, pt_ap, pt_b, p0, pt_2, psurf2, load2)
129	! Test for same number of vertical levels
130	IF (klev_src /= klev_src2) THEN
131	WRITE(lunout,*) 'Two aerosols files with different number of vertical levels is not allowded'
132	CALL abort_gcm('readaersosol','Error in number of vertical levels',1)
133	END IF
134
135	! Linare interpolate to the actual year:
136	DO it=1,12
137	DO k=1,klev_src
138	DO i = 1, klon
139	pt_out(i,k,it) = &
140	pt_out(i,k,it) - FLOAT(iyr_in-iyr1)/FLOAT(iyr2-iyr1) * &
141	(pt_out(i,k,it) - pt_2(i,k,it))
142	END DO
143	END DO
144
145	DO i = 1, klon
146	psurf(i,it) = &
147	psurf(i,it) - FLOAT(iyr_in-iyr1)/FLOAT(iyr2-iyr1) * &
148	(psurf(i,it) - psurf2(i,it))
149
150	load(i,it) = &
151	load(i,it) - FLOAT(iyr_in-iyr1)/FLOAT(iyr2-iyr1) * &
152	(load(i,it) - load2(i,it))
153	END DO
154	END DO
155
156	! Deallocate pt_2 no more needed
157	DEALLOCATE(pt_2)
158
159	END IF ! lonlyone
160	END IF ! iyr_in .LT. 1850
161
162	ELSE
163	WRITE(lunout,*)'This option is not implemented : aer_type = ', type,' name_aero=',name_aero
164	CALL abort_gcm('readaerosol','Error : aer_type parameter not accepted',1)
165	END IF ! type
166
167
168	END SUBROUTINE readaerosol
169
170
171	SUBROUTINE get_aero_fromfile(varname, cyr, filename, klev_src, pt_ap, pt_b, p0, pt_year, psurf_out, load_out)
172	!****************************************************************************************
173	! Read 12 month aerosol from file and distribute to local process on physical grid.
174	! Vertical levels, klev_src, may differ from model levels if new file format.
175	!
176	! For mpi_root and master thread :
177	! 1) Open file
178	! 2) Find vertical dimension klev_src
179	! 3) Read field month by month
180	! 4) Close file
181	! 5) Transform the global field from 2D(iim, jjp+1) to 1D(klon_glo)
182	! - Also the levels and the latitudes have to be inversed
183	!
184	! For all processes and threads :
185	! 6) Scatter global field(klon_glo) to local process domain(klon)
186	! 7) Test for negative values
187	!****************************************************************************************
188
189	USE netcdf
190	USE dimphy
191	USE mod_grid_phy_lmdz
192	USE mod_phys_lmdz_para
193	USE iophy, ONLY : io_lon, io_lat
194
195	IMPLICIT NONE
196
197	INCLUDE "dimensions.h"
198	INCLUDE "iniprint.h"
199
200	! Input argumets
201	CHARACTER(len=7), INTENT(IN) :: varname
202	CHARACTER(len=4), INTENT(IN) :: cyr
203	CHARACTER(len=8), INTENT(IN) :: filename
204
205	! Output arguments
206	INTEGER, INTENT(OUT) :: klev_src ! Number of vertical levels in file
207	REAL, POINTER, DIMENSION(:) :: pt_ap ! Pointer for describing the vertical levels
208	REAL, POINTER, DIMENSION(:) :: pt_b ! Pointer for describing the vertical levels
209	REAL :: p0 ! Reference pressure value
210	REAL, POINTER, DIMENSION(:,:,:) :: pt_year ! Pointer-variabale from file, 12 month, grid : klon,klev_src
211	REAL, DIMENSION(klon,12), INTENT(OUT) :: psurf_out ! Surface pression for 12 months
212	REAL, DIMENSION(klon,12), INTENT(OUT) :: load_out ! Aerosol mass load in each column
213	INTEGER :: nbr_tsteps ! number of month in file read
214
215	! Local variables
216	CHARACTER(len=30) :: fname
217	CHARACTER(len=30) :: cvar
218	INTEGER :: ncid, dimid, varid
219	INTEGER :: imth, i, j, k, ierr
220	REAL :: npole, spole
221	REAL, ALLOCATABLE, DIMENSION(:,:,:) :: varmth
222	REAL, ALLOCATABLE, DIMENSION(:,:,:,:) :: varyear ! Global variable read from file, 12 month
223	REAL, ALLOCATABLE, DIMENSION(:,:,:) :: varyear_glo1D !(klon_glo, klev_src, 12)
224	REAL, ALLOCATABLE, DIMENSION(:) :: varktmp
225
226	REAL, DIMENSION(iim,jjm+1,12) :: psurf_glo2D ! Surface pression for 12 months on dynamics global grid
227	REAL, DIMENSION(klon_glo,12) :: psurf_glo1D ! -"- on physical global grid
228	REAL, DIMENSION(iim,jjm+1,12) :: load_glo2D ! Load for 12 months on dynamics global grid
229	REAL, DIMENSION(klon_glo,12) :: load_glo1D ! -"- on physical global grid
230	REAL, DIMENSION(iim,jjm+1) :: vartmp
231	REAL, DIMENSION(iim) :: lon_src ! longitudes in file
232	REAL, DIMENSION(jjm+1) :: lat_src, lat_src_inv ! latitudes in file
233	LOGICAL :: new_file ! true if new file format detected
234	LOGICAL :: invert_lat ! true if the field has to be inverted for latitudes
235
236
237	! Deallocate pointers
238	IF (ASSOCIATED(pt_ap)) DEALLOCATE(pt_ap)
239	IF (ASSOCIATED(pt_b)) DEALLOCATE(pt_b)
240
241	IF (is_mpi_root .AND. is_omp_root) THEN
242
243	! 1) Open file
244	!****************************************************************************************
245	! Add suffix to filename
246	fname = trim(filename)//cyr//'.nc'
247
248	WRITE(lunout,*) 'reading variable ',TRIM(varname),' in file ', TRIM(fname)
249	CALL check_err( nf90_open(TRIM(fname), NF90_NOWRITE, ncid) )
250
251	! Test for equal longitudes and latitudes in file and model
252	!****************************************************************************************
253	! Read and test longitudes
254	CALL check_err( nf90_inq_varid(ncid, 'lon', varid) )
255	CALL check_err( nf90_get_var(ncid, varid, lon_src(:)) )
256
257	IF (maxval(ABS(lon_src - io_lon)) > 0.001) THEN
258	WRITE(lunout,*) 'Problem in longitudes read from file : ',TRIM(fname)
259	WRITE(lunout,*) 'longitudes in file ', TRIM(fname),' : ', lon_src
260	WRITE(lunout,*) 'longitudes in model :', io_lon
261
262	CALL abort_gcm('get_aero_fromfile', 'longitudes are not the same in file and model',1)
263	END IF
264
265	! Read and test latitudes
266	CALL check_err( nf90_inq_varid(ncid, 'lat', varid) )
267	CALL check_err( nf90_get_var(ncid, varid, lat_src(:)) )
268
269	! Invert source latitudes
270	DO j = 1, jjm+1
271	lat_src_inv(j) = lat_src(jjm+1 +1 -j)
272	END DO
273
274	IF (maxval(ABS(lat_src - io_lat)) < 0.001) THEN
275	! Latitudes are the same
276	invert_lat=.FALSE.
277	ELSE IF (maxval(ABS(lat_src_inv - io_lat)) < 0.001) THEN
278	! Inverted source latitudes correspond to model latitudes
279	WRITE(lunout,*) 'latitudes will be inverted for file : ',TRIM(fname)
280	invert_lat=.TRUE.
281	ELSE
282	WRITE(lunout,*) 'Problem in latitudes read from file : ',TRIM(fname)
283	WRITE(lunout,*) 'latitudes in file ', TRIM(fname),' : ', lat_src
284	WRITE(lunout,*) 'latitudes in model :', io_lat
285	CALL abort_gcm('get_aero_fromfile', 'latitudes do not correspond between file and model',1)
286	END IF
287
288
289	! 2) Check if old or new file is avalabale.
290	! New type of file should contain the dimension 'lev'
291	! Old type of file should contain the dimension 'PRESNIVS'
292	!****************************************************************************************
293	ierr = nf90_inq_dimid(ncid, 'lev', dimid)
294	IF (ierr /= NF90_NOERR) THEN
295	! Coordinate axe lev not found. Check for presnivs.
296	ierr = nf90_inq_dimid(ncid, 'PRESNIVS', dimid)
297	IF (ierr /= NF90_NOERR) THEN
298	! Dimension PRESNIVS not found either
299	CALL abort_gcm('get_aero_fromfile', 'dimension lev or presnivs not in file',1)
300	ELSE
301	! Old file found
302	new_file=.FALSE.
303	WRITE(lunout,*) 'Vertical interpolation for ',TRIM(varname),' will not be done'
304	END IF
305	ELSE
306	! New file found
307	new_file=.TRUE.
308	WRITE(lunout,*) 'Vertical interpolation for ',TRIM(varname),' will be done'
309	END IF
310
311	! 2) Find vertical dimension klev_src
312	!****************************************************************************************
313	CALL check_err( nf90_inquire_dimension(ncid, dimid, len = klev_src) )
314
315	! Allocate variables depending on the number of vertical levels
316	ALLOCATE(varmth(iim, jjm+1, klev_src), varyear(iim, jjm+1, klev_src, 12), stat=ierr)
317	IF (ierr /= 0) CALL abort_gcm('get_aero_fromfile', 'pb in allocation 1',1)
318
319	ALLOCATE(pt_ap(klev_src), pt_b(klev_src), varktmp(klev_src), stat=ierr)
320	IF (ierr /= 0) CALL abort_gcm('get_aero_fromfile', 'pb in allocation 2',1)
321
322	! 3) Read all variables from file
323	! There is 2 options for the file structure :
324	! new_file=TRUE : read varyear, ps, pt_ap and pt_b
325	! new_file=FALSE : read varyear month by month
326	!****************************************************************************************
327
328	IF (new_file) THEN
329
330	! **) Check number of month in file opened
331	!**************************************************************************************************
332	ierr = nf90_inq_dimid(ncid, 'TIME',dimid)
333	CALL check_err( nf90_inquire_dimension(ncid, dimid, len = nbr_tsteps) )
334	! IF (nbr_tsteps /= 12 .AND. nbr_tsteps /= 14) THEN
335	IF (nbr_tsteps /= 12 ) THEN
336	CALL abort_gcm('get_aero_fromfile', &
337	'not the right number of months in aerosol file read (should be 12 for the moment)',1)
338	ENDIF
339
340	! ++) Read the aerosol concentration month by month and concatenate to total variable varyear
341	!****************************************************************************************
342	! Get variable id
343	CALL check_err( nf90_inq_varid(ncid, TRIM(varname), varid) )
344
345	! Get the variable
346	CALL check_err( nf90_get_var(ncid, varid, varyear(:,:,:,:)) )
347
348	! ++) Read surface pression, 12 month in one variable
349	!****************************************************************************************
350	! Get variable id
351	CALL check_err( nf90_inq_varid(ncid, "ps", varid) )
352	! Get the variable
353	CALL check_err( nf90_get_var(ncid, varid, psurf_glo2D) )
354
355	! ++) Read mass load, 12 month in one variable
356	!****************************************************************************************
357	! Get variable id
358	CALL check_err( nf90_inq_varid(ncid, "load_"//TRIM(varname), varid) )
359	! Get the variable
360	CALL check_err( nf90_get_var(ncid, varid, load_glo2D) )
361
362	! ++) Read ap
363	!****************************************************************************************
364	! Get variable id
365	CALL check_err( nf90_inq_varid(ncid, "ap", varid) )
366	! Get the variable
367	CALL check_err( nf90_get_var(ncid, varid, pt_ap) )
368
369	! ++) Read b
370	!****************************************************************************************
371	! Get variable id
372	CALL check_err( nf90_inq_varid(ncid, "b", varid) )
373	! Get the variable
374	CALL check_err( nf90_get_var(ncid, varid, pt_b) )
375
376	! ++) Read p0 : reference pressure
377	!****************************************************************************************
378	! Get variable id
379	CALL check_err( nf90_inq_varid(ncid, "p0", varid) )
380	! Get the variable
381	CALL check_err( nf90_get_var(ncid, varid, p0) )
382
383
384	ELSE ! old file
385
386	! ++) Read the aerosol concentration month by month and concatenate to total variable varyear
387	!****************************************************************************************
388	DO imth=1, 12
389	IF (imth.EQ.1) THEN
390	cvar=TRIM(varname)//'JAN'
391	ELSE IF (imth.EQ.2) THEN
392	cvar=TRIM(varname)//'FEB'
393	ELSE IF (imth.EQ.3) THEN
394	cvar=TRIM(varname)//'MAR'
395	ELSE IF (imth.EQ.4) THEN
396	cvar=TRIM(varname)//'APR'
397	ELSE IF (imth.EQ.5) THEN
398	cvar=TRIM(varname)//'MAY'
399	ELSE IF (imth.EQ.6) THEN
400	cvar=TRIM(varname)//'JUN'
401	ELSE IF (imth.EQ.7) THEN
402	cvar=TRIM(varname)//'JUL'
403	ELSE IF (imth.EQ.8) THEN
404	cvar=TRIM(varname)//'AUG'
405	ELSE IF (imth.EQ.9) THEN
406	cvar=TRIM(varname)//'SEP'
407	ELSE IF (imth.EQ.10) THEN
408	cvar=TRIM(varname)//'OCT'
409	ELSE IF (imth.EQ.11) THEN
410	cvar=TRIM(varname)//'NOV'
411	ELSE IF (imth.EQ.12) THEN
412	cvar=TRIM(varname)//'DEC'
413	END IF
414
415	! Get variable id
416	CALL check_err( nf90_inq_varid(ncid, TRIM(cvar), varid) )
417
418	! Get the variable
419	CALL check_err( nf90_get_var(ncid, varid, varmth) )
420
421	! Store in variable for the whole year
422	varyear(:,:,:,imth)=varmth(:,:,:)
423
424	END DO
425
426	! Putting dummy
427	psurf_glo2D(:,:,:) = not_valid
428	load_glo2D(:,:,:) = not_valid
429	pt_ap(:) = not_valid
430	pt_b(:) = not_valid
431
432	END IF
433
434	! 4) Close file
435	!****************************************************************************************
436	CALL check_err( nf90_close(ncid) )
437
438
439	! 5) Transform the global field from 2D(iim, jjp+1) to 1D(klon_glo)
440	!****************************************************************************************
441	! Test if vertical levels have to be inversed
442
443	IF ((pt_b(1) < pt_b(klev_src)) .OR. .NOT. new_file) THEN
444	! WRITE(lunout,*) 'Vertical axis in file ',TRIM(fname), ' needs to be inverted'
445	! WRITE(lunout,*) 'before pt_ap = ', pt_ap
446	! WRITE(lunout,*) 'before pt_b = ', pt_b
447
448	! Inverse vertical levels for varyear
449	DO imth=1, 12
450	varmth(:,:,:) = varyear(:,:,:,imth) ! use varmth temporarly
451	DO k=1, klev_src
452	DO j=1, jjm+1
453	DO i=1,iim
454	varyear(i,j,k,imth) = varmth(i,j,klev_src+1-k)
455	END DO
456	END DO
457	END DO
458	END DO
459
460	! Inverte vertical axes for pt_ap and pt_b
461	varktmp(:) = pt_ap(:)
462	DO k=1, klev_src
463	pt_ap(k) = varktmp(klev_src+1-k)
464	END DO
465
466	varktmp(:) = pt_b(:)
467	DO k=1, klev_src
468	pt_b(k) = varktmp(klev_src+1-k)
469	END DO
470	WRITE(lunout,*) 'after pt_ap = ', pt_ap
471	WRITE(lunout,*) 'after pt_b = ', pt_b
472
473	ELSE
474	WRITE(lunout,*) 'Vertical axis in file ',TRIM(fname), ' is ok, no vertical inversion is done'
475	WRITE(lunout,*) 'pt_ap = ', pt_ap
476	WRITE(lunout,*) 'pt_b = ', pt_b
477	END IF
478
479	! - Invert latitudes if necessary
480	DO imth=1, 12
481	IF (invert_lat) THEN
482
483	! Invert latitudes for the variable
484	varmth(:,:,:) = varyear(:,:,:,imth) ! use varmth temporarly
485	DO k=1,klev_src
486	DO j=1,jjm+1
487	DO i=1,iim
488	varyear(i,j,k,imth) = varmth(i,jjm+1+1-j,k)
489	END DO
490	END DO
491	END DO
492
493	! Invert latitudes for surface pressure
494	vartmp(:,:) = psurf_glo2D(:,:,imth)
495	DO j=1, jjm+1
496	DO i=1,iim
497	psurf_glo2D(i,j,imth)= vartmp(i,jjm+1+1-j)
498	END DO
499	END DO
500
501	! Invert latitudes for the load
502	vartmp(:,:) = load_glo2D(:,:,imth)
503	DO j=1, jjm+1
504	DO i=1,iim
505	load_glo2D(i,j,imth)= vartmp(i,jjm+1+1-j)
506	END DO
507	END DO
508	END IF ! invert_lat
509
510	! Do zonal mead at poles and distribut at whole first and last latitude
511	DO k=1, klev_src
512	npole=0. ! North pole, j=1
513	spole=0. ! South pole, j=jjm+1
514	DO i=1,iim
515	npole = npole + varyear(i,1,k,imth)
516	spole = spole + varyear(i,jjm+1,k,imth)
517	END DO
518	npole = npole/FLOAT(iim)
519	spole = spole/FLOAT(iim)
520	varyear(:,1, k,imth) = npole
521	varyear(:,jjm+1,k,imth) = spole
522	END DO
523	END DO ! imth
524
525	ALLOCATE(varyear_glo1D(klon_glo, klev_src, 12), stat=ierr)
526	IF (ierr /= 0) CALL abort_gcm('get_aero_fromfile', 'pb in allocation 3',1)
527
528	! Transform from 2D to 1D field
529	CALL grid2Dto1D_glo(varyear,varyear_glo1D)
530	CALL grid2Dto1D_glo(psurf_glo2D,psurf_glo1D)
531	CALL grid2Dto1D_glo(load_glo2D,load_glo1D)
532
533	ELSE
534	ALLOCATE(varyear_glo1D(0,0,0))
535	END IF ! is_mpi_root .AND. is_omp_root
536
537	!$OMP BARRIER
538
539	! 6) Distribute to all processes
540	! Scatter global field(klon_glo) to local process domain(klon)
541	! and distribute klev_src to all processes
542	!****************************************************************************************
543
544	! Distribute klev_src
545	CALL bcast(klev_src)
546
547	! Allocate and distribute pt_ap and pt_b
548	IF (.NOT. ASSOCIATED(pt_ap)) THEN ! if pt_ap is allocated also pt_b is allocated
549	ALLOCATE(pt_ap(klev_src), pt_b(klev_src), stat=ierr)
550	IF (ierr /= 0) CALL abort_gcm('get_aero_fromfile', 'pb in allocation 4',1)
551	END IF
552	CALL bcast(pt_ap)
553	CALL bcast(pt_b)
554
555	! Allocate space for output pointer variable at local process
556	IF (ASSOCIATED(pt_year)) DEALLOCATE(pt_year)
557	ALLOCATE(pt_year(klon, klev_src, 12), stat=ierr)
558	IF (ierr /= 0) CALL abort_gcm('get_aero_fromfile', 'pb in allocation 5',1)
559
560	! Scatter global field to local domain at local process
561	CALL scatter(varyear_glo1D, pt_year)
562	CALL scatter(psurf_glo1D, psurf_out)
563	CALL scatter(load_glo1D, load_out)
564
565	! 7) Test for negative values
566	!****************************************************************************************
567	IF (MINVAL(pt_year) < 0.) THEN
568	WRITE(lunout,*) 'Warning! Negative values read from file :', fname
569	END IF
570
571	END SUBROUTINE get_aero_fromfile
572
573
574	SUBROUTINE check_err(status)
575	USE netcdf
576	IMPLICIT NONE
577
578	INCLUDE "iniprint.h"
579	INTEGER, INTENT (IN) :: status
580
581	IF (status /= NF90_NOERR) THEN
582	WRITE(lunout,*) 'Error in get_aero_fromfile ',status
583	CALL abort_gcm('get_aero_fromfile',trim(nf90_strerror(status)),1)
584	END IF
585
586	END SUBROUTINE check_err
587
588
589	END MODULE readaerosol_mod

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