source: LMDZ5/trunk/libf/phylmd/readaerosol_interp.F90 @ 2215

Last change on this file since 2215 was 1907, checked in by lguez, 11 years ago

Added a copyright property to every file of the distribution, except
for the fcm files (which have their own copyright). Use svn propget on
a file to see the copyright. For instance:

$ svn propget copyright libf/phylmd/physiq.F90
Name of program: LMDZ
Creation date: 1984
Version: LMDZ5
License: CeCILL version 2
Holder: Laboratoire de m\'et\'eorologie dynamique, CNRS, UMR 8539
See the license file in the root directory

Also added the files defining the CeCILL version 2 license, in French
and English, at the top of the LMDZ tree.

  • Property copyright set to
    Name of program: LMDZ
    Creation date: 1984
    Version: LMDZ5
    License: CeCILL version 2
    Holder: Laboratoire de m\'et\'eorologie dynamique, CNRS, UMR 8539
    See the license file in the root directory
File size: 23.4 KB
Line 
1! $Id$
2!
3SUBROUTINE readaerosol_interp(id_aero, itap, pdtphys, r_day, first, pplay, paprs, t_seri, mass_out, pi_mass_out, load_src)
4!
5! This routine will return the mass concentration at actual day(mass_out) and
6! the pre-industrial values(pi_mass_out) for aerosol corresponding to "id_aero".
7! The mass concentrations for all aerosols are saved in this routine but each
8! call to this routine only treats the aerosol "id_aero".
9!
10! 1) Read in data for the whole year, only at first time step
11! 2) Interpolate to the actual day, only at new day
12! 3) Interpolate to the model vertical grid (target grid), only at new day
13! 4) Test for negative mass values
14
15  USE ioipsl
16  USE dimphy, ONLY : klev,klon
17  USE mod_phys_lmdz_para, ONLY : mpi_rank 
18  USE readaerosol_mod
19  USE aero_mod, ONLY : naero_spc, name_aero
20  USE write_field_phy
21  USE phys_cal_mod
22  USE pres2lev_mod
23
24  IMPLICIT NONE
25
26  INCLUDE "YOMCST.h"
27  INCLUDE "chem.h"     
28  INCLUDE "temps.h"     
29  INCLUDE "clesphys.h"
30  INCLUDE "iniprint.h"
31  INCLUDE "dimensions.h"
32  INCLUDE "comvert.h"
33!
34! Input:
35!****************************************************************************************
36  INTEGER, INTENT(IN)                    :: id_aero! Identity number for the aerosol to treat
37  INTEGER, INTENT(IN)                    :: itap   ! Physic step count
38  REAL, INTENT(IN)                       :: pdtphys! Physic day step
39  REAL, INTENT(IN)                       :: r_day  ! Day of integration
40  LOGICAL, INTENT(IN)                    :: first  ! First model timestep
41  REAL, DIMENSION(klon,klev), INTENT(IN) :: pplay  ! pression at model mid-layers
42  REAL, DIMENSION(klon,klev+1),INTENT(IN):: paprs  ! pression between model layers
43  REAL, DIMENSION(klon,klev), INTENT(IN) :: t_seri ! air temperature
44!     
45! Output:     
46!****************************************************************************************
47  REAL, INTENT(OUT) :: mass_out(klon,klev)    ! Mass of aerosol (monthly mean data,from file) [ug AIBCM/m3]
48  REAL, INTENT(OUT) :: pi_mass_out(klon,klev) ! Mass of preindustrial aerosol (monthly mean data,from file) [ug AIBCM/m3]
49  REAL, INTENT(OUT) :: load_src(klon) ! Load of aerosol (monthly mean data,from file) [kg/m3]
50!     
51! Local Variables:
52!****************************************************************************************
53  INTEGER                         :: i, k, ierr
54  INTEGER                         :: iday, iyr, lmt_pas
55!  INTEGER                         :: im, day1, day2, im2
56  INTEGER                         :: im, im2
57  REAL                            :: day1, day2
58  INTEGER                         :: pi_klev_src ! Only for testing purpose
59  INTEGER, SAVE                   :: klev_src    ! Number of vertical levles in source field
60!$OMP THREADPRIVATE(klev_src)
61
62  REAL                              :: zrho      ! Air density [kg/m3]
63  REAL                              :: volm      ! Volyme de melange [kg/kg]
64  REAL, DIMENSION(klon)             :: psurf_day, pi_psurf_day
65  REAL, DIMENSION(klon)             :: pi_load_src  ! Mass load at source grid
66  REAL, DIMENSION(klon)             :: load_tgt, load_tgt_test
67  REAL, DIMENSION(klon,klev)        :: delp ! pressure difference in each model layer
68
69  REAL, ALLOCATABLE, DIMENSION(:,:)            :: pplay_src ! pression mid-layer at source levels
70  REAL, ALLOCATABLE, DIMENSION(:,:)            :: tmp1, tmp2  ! Temporary variables
71  REAL, ALLOCATABLE, DIMENSION(:,:,:,:), SAVE  :: var_year    ! VAR in right dimension for the total year
72  REAL, ALLOCATABLE, DIMENSION(:,:,:,:), SAVE  :: pi_var_year ! pre-industrial VAR, -"-
73!$OMP THREADPRIVATE(var_year,pi_var_year)
74  REAL, ALLOCATABLE, DIMENSION(:,:,:),SAVE     :: var_day     ! VAR interpolated to the actual day and model grid
75  REAL, ALLOCATABLE, DIMENSION(:,:,:),SAVE     :: pi_var_day  ! pre-industrial VAR, -"-
76!$OMP THREADPRIVATE(var_day,pi_var_day)
77  REAL, ALLOCATABLE, DIMENSION(:,:,:), SAVE    :: psurf_year, pi_psurf_year ! surface pressure for the total year
78!$OMP THREADPRIVATE(psurf_year, pi_psurf_year)
79  REAL, ALLOCATABLE, DIMENSION(:,:,:), SAVE    :: load_year, pi_load_year   ! load in the column for the total year
80!$OMP THREADPRIVATE(load_year, pi_load_year)
81
82  REAL, DIMENSION(:,:,:), POINTER   :: pt_tmp      ! Pointer allocated in readaerosol
83  REAL, POINTER, DIMENSION(:), SAVE :: pt_ap, pt_b ! Pointer for describing the vertical levels
84!$OMP THREADPRIVATE(pt_ap, pt_b)
85  INTEGER, SAVE                     :: nbr_tsteps ! number of time steps in file read
86  REAL, DIMENSION(14), SAVE         :: month_len, month_start, month_mid
87!$OMP THREADPRIVATE(nbr_tsteps, month_len, month_start, month_mid)
88  REAL                              :: jDay
89
90  LOGICAL            :: lnewday      ! Indicates if first time step at a new day
91  LOGICAL            :: OLDNEWDAY
92  LOGICAL,SAVE       :: vert_interp  ! Indicates if vertical interpolation will be done
93  LOGICAL,SAVE       :: debug=.FALSE.! Debugging in this subroutine
94!$OMP THREADPRIVATE(vert_interp, debug)
95  CHARACTER(len=8)      :: type
96  CHARACTER(len=8)      :: filename
97
98
99!****************************************************************************************
100! Initialization
101!
102!****************************************************************************************
103
104! Calculation to find if it is a new day
105
106  IF(mpi_rank == 0 .AND. debug )then
107     PRINT*,'CONTROL PANEL REGARDING TIME STEPING'
108  ENDIF
109
110  ! Use phys_cal_mod
111  iday= day_cur
112  iyr = year_cur
113  im  = mth_cur
114
115!  iday = INT(r_day)
116!  iyr  = iday/360
117!  iday = iday-iyr*360         ! day of the actual year
118!  iyr  = iyr + annee_ref      ! year of the run   
119!  im   = iday/30 +1           ! the actual month
120  CALL ymds2ju(iyr, im, iday, 0., jDay)
121!   CALL ymds2ju(iyr, im, iday-(im-1)*30, 0., jDay)
122
123
124  IF(MOD(itap-1,NINT(86400./pdtphys)) == 0)THEN
125     lnewday=.TRUE.
126  ELSE
127     lnewday=.FALSE.
128  ENDIF
129
130  IF(mpi_rank == 0 .AND. debug)then
131     ! 0.02 is about 0.5/24, namly less than half an hour
132     OLDNEWDAY = (r_day-REAL(iday) < 0.02)
133     ! Once per day, update aerosol fields
134     lmt_pas = NINT(86400./pdtphys)
135     PRINT*,'r_day-REAL(iday) =',r_day-REAL(iday)
136     PRINT*,'itap =',itap
137     PRINT*,'pdtphys =',pdtphys
138     PRINT*,'lmt_pas =',lmt_pas
139     PRINT*,'iday =',iday
140     PRINT*,'r_day =',r_day
141     PRINT*,'day_cur =',day_cur
142     PRINT*,'mth_cur =',mth_cur
143     PRINT*,'year_cur =',year_cur
144     PRINT*,'NINT(86400./pdtphys) =',NINT(86400./pdtphys)
145     PRINT*,'MOD(0,1) =',MOD(0,1)
146     PRINT*,'lnewday =',lnewday
147     PRINT*,'OLDNEWDAY =',OLDNEWDAY
148  ENDIF
149
150  IF (.NOT. ALLOCATED(var_day)) THEN
151     ALLOCATE( var_day(klon, klev, naero_spc), stat=ierr)
152     IF (ierr /= 0) CALL abort_gcm('readaerosol_interp', 'pb in allocation 1',1)
153     ALLOCATE( pi_var_day(klon, klev, naero_spc), stat=ierr)
154     IF (ierr /= 0) CALL abort_gcm('readaerosol_interp', 'pb in allocation 2',1)
155
156     ALLOCATE( psurf_year(klon, 12, naero_spc), pi_psurf_year(klon, 12, naero_spc), stat=ierr)
157     IF (ierr /= 0) CALL abort_gcm('readaerosol_interp', 'pb in allocation 3',1)
158
159     ALLOCATE( load_year(klon, 12, naero_spc), pi_load_year(klon, 12, naero_spc), stat=ierr)
160     IF (ierr /= 0) CALL abort_gcm('readaerosol_interp', 'pb in allocation 4',1)
161
162     lnewday=.TRUE.
163
164     NULLIFY(pt_ap)
165     NULLIFY(pt_b)
166  END IF
167
168!****************************************************************************************
169! 1) Read in data : corresponding to the actual year and preindustrial data.
170!    Only for the first day of the year.
171!
172!****************************************************************************************
173  IF ( (first .OR. iday==0) .AND. lnewday ) THEN
174     NULLIFY(pt_tmp)
175
176     ! Reading values corresponding to the closest year taking into count the choice of aer_type.
177     ! For aer_type=scenario interpolation between 2 data sets is done in readaerosol.
178     ! If aer_type=mix1, mix2 or mix3, the run type and file name depends on the aerosol.
179     IF (aer_type=='preind' .OR. aer_type=='actuel' .OR. aer_type=='annuel' .OR. aer_type=='scenario') THEN
180        ! Standard case
181        filename='aerosols'
182        type=aer_type
183     ELSE IF (aer_type == 'mix1') THEN
184        ! Special case using a mix of decenal sulfate file and annual aerosols(all aerosols except sulfate)
185        IF (name_aero(id_aero) == 'SO4') THEN
186           filename='so4.run '
187           type='scenario'
188        ELSE
189           filename='aerosols'
190           type='annuel'
191        END IF
192     ELSE  IF (aer_type == 'mix2') THEN
193        ! Special case using a mix of decenal sulfate file and natrual aerosols
194        IF (name_aero(id_aero) == 'SO4') THEN
195           filename='so4.run '
196           type='scenario'
197        ELSE
198           filename='aerosols'
199           type='preind'
200        END IF
201     ELSE  IF (aer_type == 'mix3') THEN
202        ! Special case using a mix of annual sulfate file and natrual aerosols
203        IF (name_aero(id_aero) == 'SO4') THEN
204           filename='aerosols'
205           type='annuel'
206        ELSE
207           filename='aerosols'
208           type='preind'
209        END IF
210     ELSE
211        CALL abort_gcm('readaerosol_interp', 'this aer_type not supported',1)
212     END IF
213
214     CALL readaerosol(name_aero(id_aero), type, filename, iyr, klev_src, pt_ap, pt_b, pt_tmp, &
215          psurf_year(:,:,id_aero), load_year(:,:,id_aero))
216     IF (.NOT. ALLOCATED(var_year)) THEN
217        ALLOCATE(var_year(klon, klev_src, 12, naero_spc), stat=ierr)
218        IF (ierr /= 0) CALL abort_gcm('readaerosol_interp', 'pb in allocation 5',1)
219     END IF
220     var_year(:,:,:,id_aero) = pt_tmp(:,:,:)
221
222     ! Reading values corresponding to the preindustrial concentrations.
223     type='preind'
224     CALL readaerosol(name_aero(id_aero), type, filename, iyr, pi_klev_src, pt_ap, pt_b, pt_tmp, &
225          pi_psurf_year(:,:,id_aero), pi_load_year(:,:,id_aero))
226
227     ! klev_src must be the same in both files.
228     ! Also supposing pt_ap and pt_b to be the same in the 2 files without testing.
229     IF (pi_klev_src /= klev_src) THEN
230        WRITE(lunout,*) 'Error! All forcing files for the same aerosol must have the same vertical dimension'
231        WRITE(lunout,*) 'Aerosol : ', name_aero(id_aero)
232        CALL abort_gcm('readaerosol_interp','Differnt vertical axes in aerosol forcing files',1)
233     END IF
234
235     IF (.NOT. ALLOCATED(pi_var_year)) THEN
236        ALLOCATE(pi_var_year(klon, klev_src, 12, naero_spc), stat=ierr)
237        IF (ierr /= 0) CALL abort_gcm('readaerosol_interp', 'pb in allocation 6',1)
238     END IF
239     pi_var_year(:,:,:,id_aero) = pt_tmp(:,:,:)
240   
241     IF (debug) THEN
242        CALL writefield_phy('var_year_jan',var_year(:,:,1,id_aero),klev_src)
243        CALL writefield_phy('var_year_dec',var_year(:,:,12,id_aero),klev_src)
244        CALL writefield_phy('psurf_src',psurf_year(:,:,id_aero),1)
245        CALL writefield_phy('pi_psurf_src',pi_psurf_year(:,:,id_aero),1)
246        CALL writefield_phy('load_year_src',load_year(:,:,id_aero),1)
247        CALL writefield_phy('pi_load_year_src',pi_load_year(:,:,id_aero),1)
248     END IF
249
250     ! Pointer no more useful, deallocate.
251     DEALLOCATE(pt_tmp)
252
253     ! Test if vertical interpolation will be needed.
254     IF (psurf_year(1,1,id_aero)==not_valid .OR. pi_psurf_year(1,1,id_aero)==not_valid ) THEN
255        ! Pressure=not_valid indicates old file format, see module readaerosol
256        vert_interp = .FALSE.
257
258        ! If old file format, both psurf_year and pi_psurf_year must be not_valid
259        IF (  psurf_year(1,1,id_aero) /= pi_psurf_year(1,1,id_aero) ) THEN
260           WRITE(lunout,*) 'Warning! All forcing files for the same aerosol must have the same structure'
261           CALL abort_gcm('readaerosol_interp', 'The aerosol files have not the same format',1)
262        END IF
263       
264        IF (klev /= klev_src) THEN
265           WRITE(lunout,*) 'Old format of aerosol file do not allowed vertical interpolation'
266           CALL abort_gcm('readaerosol_interp', 'Old aerosol file not possible',1)
267        END IF
268
269     ELSE
270        vert_interp = .TRUE.
271     END IF
272
273!    Calendar initialisation
274!
275     DO i = 2, 13
276       month_len(i) = REAL(ioget_mon_len(year_cur, i-1))
277       CALL ymds2ju(year_cur, i-1, 1, 0.0, month_start(i))
278     ENDDO
279     month_len(1) = REAL(ioget_mon_len(year_cur-1, 12))
280     CALL ymds2ju(year_cur-1, 12, 1, 0.0, month_start(1))
281     month_len(14) = REAL(ioget_mon_len(year_cur+1, 1))
282     CALL ymds2ju(year_cur+1, 1, 1, 0.0, month_start(14))
283     month_mid(:) = month_start (:) + month_len(:)/2.
284     
285     if (debug) then
286       write(lunout,*)' month_len = ',month_len
287       write(lunout,*)' month_mid = ',month_mid
288     endif
289
290  END IF  ! IF ( (first .OR. iday==0) .AND. lnewday ) THEN
291 
292!****************************************************************************************
293! - 2) Interpolate to the actual day.
294! - 3) Interpolate to the model vertical grid.
295!
296!****************************************************************************************
297
298  IF (lnewday) THEN ! only if new day
299!****************************************************************************************
300! 2) Interpolate to the actual day
301!
302!****************************************************************************************
303    ! Find which months and days to use for time interpolation
304     nbr_tsteps = 12
305     IF (nbr_tsteps == 12) then
306       IF (jDay < month_mid(im+1)) THEN
307          im2=im-1
308          day2 = month_mid(im2+1)
309          day1 = month_mid(im+1)
310          IF (im2 <= 0) THEN
311             ! the month is january, thus the month before december
312             im2=12
313          END IF
314       ELSE
315          ! the second half of the month
316          im2=im+1
317          day2 = month_mid(im+1)
318          day1 = month_mid(im2+1)
319          IF (im2 > 12) THEN
320             ! the month is december, the following thus january
321             im2=1
322          ENDIF
323       END IF
324     ELSE IF (nbr_tsteps == 14) then
325       im = im + 1
326       IF (jDay < month_mid(im)) THEN
327          ! in the first half of the month use month before and actual month
328          im2=im-1
329          day2 = month_mid(im2)
330          day1 = month_mid(im)
331       ELSE
332          ! the second half of the month
333          im2=im+1
334          day2 = month_mid(im)
335          day1 = month_mid(im2)
336       END IF
337     ELSE
338       CALL abort_gcm('readaerosol_interp', 'number of months undefined',1)
339     ENDIF
340     if (debug) then
341       write(lunout,*)' jDay, day1, day2, im, im2 = ', jDay, day1, day2, im, im2
342     endif
343
344 
345     ! Time interpolation, still on vertical source grid
346     ALLOCATE(tmp1(klon,klev_src), tmp2(klon,klev_src),stat=ierr)
347     IF (ierr /= 0) CALL abort_gcm('readaerosol_interp', 'pb in allocation 7',1)
348
349     ALLOCATE(pplay_src(klon,klev_src), stat=ierr)
350     IF (ierr /= 0) CALL abort_gcm('readaerosol_interp', 'pb in allocation 8',1)
351     
352
353     DO k=1,klev_src
354        DO i=1,klon
355           tmp1(i,k) = &
356                var_year(i,k,im2,id_aero) - (jDay-day2)/(day1-day2) * &
357                (var_year(i,k,im2,id_aero) - var_year(i,k,im,id_aero))
358           
359           tmp2(i,k) = &
360                pi_var_year(i,k,im2,id_aero) - (jDay-day2)/(day1-day2) * &
361                (pi_var_year(i,k,im2,id_aero) - pi_var_year(i,k,im,id_aero))
362        END DO
363     END DO
364
365     ! Time interpolation for pressure at surface, still on vertical source grid
366     DO i=1,klon
367        psurf_day(i) = &
368             psurf_year(i,im2,id_aero) - (jDay-day2)/(day1-day2) * &
369             (psurf_year(i,im2,id_aero) - psurf_year(i,im,id_aero))
370       
371        pi_psurf_day(i) = &
372             pi_psurf_year(i,im2,id_aero) - (jDay-day2)/(day1-day2) * &
373             (pi_psurf_year(i,im2,id_aero) - pi_psurf_year(i,im,id_aero))
374     END DO
375
376     ! Time interpolation for the load, still on vertical source grid
377     DO i=1,klon
378        load_src(i) = &
379             load_year(i,im2,id_aero) - (jDay-day2)/(day1-day2) * &
380             (load_year(i,im2,id_aero) - load_year(i,im,id_aero))
381       
382        pi_load_src(i) = &
383             pi_load_year(i,im2,id_aero) - (jDay-day2)/(day1-day2) * &
384             (pi_load_year(i,im2,id_aero) - pi_load_year(i,im,id_aero))
385     END DO
386
387!****************************************************************************************
388! 3) Interpolate to the model vertical grid (target grid)
389!
390!****************************************************************************************
391
392     IF (vert_interp) THEN
393
394        ! - Interpolate variable tmp1 (on source grid) to var_day (on target grid)
395        !********************************************************************************
396        ! a) calculate pression at vertical levels for the source grid using the
397        !    hybrid-sigma coordinates ap and b and the surface pressure, variables from file.
398        DO k = 1, klev_src
399           DO i = 1, klon
400              pplay_src(i,k)= pt_ap(k) + pt_b(k)*psurf_day(i)
401           END DO
402        END DO
403       
404        IF (debug) THEN
405           CALL writefield_phy('psurf_day_src',psurf_day(:),1)
406           CALL writefield_phy('pplay_src',pplay_src(:,:),klev_src)
407           CALL writefield_phy('pplay',pplay(:,:),klev)
408           CALL writefield_phy('day_src',tmp1,klev_src)
409           CALL writefield_phy('pi_day_src',tmp2,klev_src)
410        END IF
411
412        ! b) vertical interpolation on pressure leveles
413        CALL pres2lev(tmp1(:,:), var_day(:,:,id_aero), klev_src, klev, pplay_src, pplay, &
414             1, klon, .FALSE.)
415       
416        IF (debug) CALL writefield_phy('day_tgt',var_day(:,:,id_aero),klev)
417       
418        ! c) adjust to conserve total aerosol mass load in the vertical pillar
419        !    Calculate the load in the actual pillar and compare with the load
420        !    read from aerosol file.
421       
422        ! Find the pressure difference in each model layer
423        DO k = 1, klev
424           DO i = 1, klon
425              delp(i,k) = paprs(i,k) - paprs (i,k+1)
426           END DO
427        END DO
428
429        ! Find the mass load in the actual pillar, on target grid
430        load_tgt(:) = 0.
431        DO k= 1, klev
432           DO i = 1, klon
433              zrho = pplay(i,k)/t_seri(i,k)/RD       ! [kg/m3]
434              volm = var_day(i,k,id_aero)*1.E-9/zrho ! [kg/kg]
435              load_tgt(i) = load_tgt(i) + 1/RG * volm *delp(i,k)
436           END DO
437        END DO
438       
439        ! Adjust, uniform
440        DO k = 1, klev
441           DO i = 1, klon
442              var_day(i,k,id_aero) = var_day(i,k,id_aero)*load_src(i)/load_tgt(i)
443           END DO
444        END DO
445       
446        IF (debug) THEN
447           load_tgt_test(:) = 0.
448           DO k= 1, klev
449              DO i = 1, klon
450                 zrho = pplay(i,k)/t_seri(i,k)/RD       ! [kg/m3]
451                 volm = var_day(i,k,id_aero)*1.E-9/zrho ! [kg/kg]
452                 load_tgt_test(i) = load_tgt_test(i) + 1/RG * volm*delp(i,k)
453              END DO
454           END DO
455           
456           CALL writefield_phy('day_tgt2',var_day(:,:,id_aero),klev)
457           CALL writefield_phy('load_tgt',load_tgt(:),1)
458           CALL writefield_phy('load_tgt_test',load_tgt_test(:),1)
459           CALL writefield_phy('load_src',load_src(:),1)
460        END IF
461
462        ! - Interpolate variable tmp2 (source grid) to pi_var_day (target grid)
463        !********************************************************************************
464        ! a) calculate pression at vertical levels at source grid   
465        DO k = 1, klev_src
466           DO i = 1, klon
467              pplay_src(i,k)= pt_ap(k) + pt_b(k)*pi_psurf_day(i)
468           END DO
469        END DO
470
471        IF (debug) THEN
472           CALL writefield_phy('pi_psurf_day_src',pi_psurf_day(:),1)
473           CALL writefield_phy('pi_pplay_src',pplay_src(:,:),klev_src)
474        END IF
475
476        ! b) vertical interpolation on pressure leveles
477        CALL pres2lev(tmp2(:,:), pi_var_day(:,:,id_aero), klev_src, klev, pplay_src, pplay, &
478             1, klon, .FALSE.)
479
480        IF (debug) CALL writefield_phy('pi_day_tgt',pi_var_day(:,:,id_aero),klev)
481
482        ! c) adjust to conserve total aerosol mass load in the vertical pillar
483        !    Calculate the load in the actual pillar and compare with the load
484        !    read from aerosol file.
485
486        ! Find the load in the actual pillar, on target grid
487        load_tgt(:) = 0.
488        DO k = 1, klev
489           DO i = 1, klon
490              zrho = pplay(i,k)/t_seri(i,k)/RD          ! [kg/m3]
491              volm = pi_var_day(i,k,id_aero)*1.E-9/zrho ! [kg/kg]
492              load_tgt(i) = load_tgt(i) + 1/RG * volm * delp(i,k)
493           END DO
494        END DO
495
496        DO k = 1, klev
497           DO i = 1, klon
498              pi_var_day(i,k,id_aero) = pi_var_day(i,k,id_aero)*pi_load_src(i)/load_tgt(i)
499           END DO
500        END DO
501
502        IF (debug) THEN
503           load_tgt_test(:) = 0.
504           DO k = 1, klev
505              DO i = 1, klon
506                 zrho = pplay(i,k)/t_seri(i,k)/RD          ! [kg/m3]
507                 volm = pi_var_day(i,k,id_aero)*1.E-9/zrho ! [kg/kg]
508                 load_tgt_test(i) = load_tgt_test(i) + 1/RG * volm * delp(i,k)
509              END DO
510           END DO
511           CALL writefield_phy('pi_day_tgt2',pi_var_day(:,:,id_aero),klev)
512           CALL writefield_phy('pi_load_tgt',load_tgt(:),1)
513           CALL writefield_phy('pi_load_tgt_test',load_tgt_test(:),1)
514           CALL writefield_phy('pi_load_src',pi_load_src(:),1)
515        END IF
516
517
518     ELSE   ! No vertical interpolation done
519
520        var_day(:,:,id_aero)    = tmp1(:,:)
521        pi_var_day(:,:,id_aero) = tmp2(:,:)
522
523     END IF ! vert_interp
524
525
526     ! Deallocation
527     DEALLOCATE(tmp1, tmp2, pplay_src, stat=ierr)
528
529!****************************************************************************************
530! 4) Test for negative mass values
531!
532!****************************************************************************************
533     IF (MINVAL(var_day(:,:,id_aero)) < 0.) THEN
534        DO k=1,klev
535           DO i=1,klon
536              ! Test for var_day
537              IF (var_day(i,k,id_aero) < 0.) THEN
538                 IF (jDay-day2 < 0.) WRITE(lunout,*) 'jDay-day2=',jDay-day2
539                 IF (var_year(i,k,im2,id_aero) - var_year(i,k,im,id_aero) < 0.) THEN
540                    WRITE(lunout,*) trim(name_aero(id_aero)),'(i,k,im2)-', &
541                         trim(name_aero(id_aero)),'(i,k,im)=',           &
542                         var_year(i,k,im2,id_aero) - var_year(i,k,im,id_aero)
543                 END IF
544                 WRITE(lunout,*) 'stop for aerosol : ',name_aero(id_aero)
545                 WRITE(lunout,*) 'day1, day2, jDay = ', day1, day2, jDay
546                 CALL abort_gcm('readaerosol_interp','Error in interpolation 1',1)
547              END IF
548           END DO
549        END DO
550     END IF
551
552     IF (MINVAL(pi_var_day(:,:,id_aero)) < 0. ) THEN
553        DO k=1, klev
554           DO i=1,klon
555              ! Test for pi_var_day
556              IF (pi_var_day(i,k,id_aero) < 0.) THEN
557                 IF (jDay-day2 < 0.) WRITE(lunout,*) 'jDay-day2=',jDay-day2
558                 IF (pi_var_year(i,k,im2,id_aero) - pi_var_year(i,k,im,id_aero) < 0.) THEN
559                    WRITE(lunout,*) trim(name_aero(id_aero)),'(i,k,im2)-', &
560                         trim(name_aero(id_aero)),'(i,k,im)=',           &
561                         pi_var_year(i,k,im2,id_aero) - pi_var_year(i,k,im,id_aero)
562                 END IF
563                 
564                 WRITE(lunout,*) 'stop for aerosol : ',name_aero(id_aero)
565                 CALL abort_gcm('readaerosol_interp','Error in interpolation 2',1)
566              END IF
567           END DO
568        END DO
569     END IF
570
571  END IF ! lnewday
572
573!****************************************************************************************
574! Copy output from saved variables
575!
576!****************************************************************************************
577
578  mass_out(:,:)    = var_day(:,:,id_aero)
579  pi_mass_out(:,:) = pi_var_day(:,:,id_aero)
580 
581END SUBROUTINE readaerosol_interp
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