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source: palm/trunk/SOURCE/lpm_init.f90 @ 2064

Last change on this file since 2064 was 2001, checked in by knoop, 8 years ago
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[1873]	1	!> @file lpm_init.f90
[2000]	2	!------------------------------------------------------------------------------!
[1036]	3	! This file is part of PALM.
	4	!
[2000]	5	! PALM is free software: you can redistribute it and/or modify it under the
	6	! terms of the GNU General Public License as published by the Free Software
	7	! Foundation, either version 3 of the License, or (at your option) any later
	8	! version.
[1036]	9	!
	10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	13	!
	14	! You should have received a copy of the GNU General Public License along with
	15	! PALM. If not, see <http://www.gnu.org/licenses/>.
	16	!
[1818]	17	! Copyright 1997-2016 Leibniz Universitaet Hannover
[2000]	18	!------------------------------------------------------------------------------!
[1036]	19	!
[254]	20	! Current revisions:
[1]	21	! -----------------
[1930]	22	!
[2001]	23	!
[1930]	24	! Former revisions:
	25	! -----------------
	26	! $Id: lpm_init.f90 2001 2016-08-20 18:41:22Z raasch $
	27	!
[2001]	28	! 2000 2016-08-20 18:09:15Z knoop
	29	! Forced header and separation lines into 80 columns
	30	!
[1930]	31	! 2016-06-09 16:25:25Z suehring
[1929]	32	! Bugfix in determining initial particle height and grid index in case of
	33	! seed_follows_topography.
	34	! Bugfix concerning random positions, ensure that particles do not move more
	35	! than one grid length.
	36	! Bugfix logarithmic interpolation.
	37	! Initial setting of sgs_wf_part.
[1321]	38	!
[1891]	39	! 1890 2016-04-22 08:52:11Z hoffmann
	40	! Initialization of aerosol equilibrium radius not possible in supersaturated
	41	! environments. Therefore, a maximum supersaturation of -1 % is assumed during
	42	! initialization.
	43	!
[1874]	44	! 1873 2016-04-18 14:50:06Z maronga
[1929]	45	! Module renamed (removed _mod
	46
[1874]	47	!
[1872]	48	! 1871 2016-04-15 11:46:09Z hoffmann
	49	! Initialization of aerosols added.
	50	!
[1851]	51	! 1850 2016-04-08 13:29:27Z maronga
	52	! Module renamed
	53	!
[1832]	54	! 1831 2016-04-07 13:15:51Z hoffmann
	55	! curvature_solution_effects moved to particle_attributes
	56	!
[1823]	57	! 1822 2016-04-07 07:49:42Z hoffmann
	58	! Unused variables removed.
	59	!
[1784]	60	! 1783 2016-03-06 18:36:17Z raasch
	61	! netcdf module added
	62	!
[1726]	63	! 1725 2015-11-17 13:01:51Z hoffmann
	64	! Bugfix: Processor-dependent seed for random function is generated before it is
	65	! used.
	66	!
[1692]	67	! 1691 2015-10-26 16:17:44Z maronga
	68	! Renamed prandtl_layer to constant_flux_layer.
	69	!
[1686]	70	! 1685 2015-10-08 07:32:13Z raasch
	71	! bugfix concerning vertical index offset in case of ocean
	72	!
[1683]	73	! 1682 2015-10-07 23:56:08Z knoop
	74	! Code annotations made doxygen readable
	75	!
[1576]	76	! 1575 2015-03-27 09:56:27Z raasch
	77	! initial vertical particle position is allowed to follow the topography
	78	!
[1360]	79	! 1359 2014-04-11 17:15:14Z hoffmann
	80	! New particle structure integrated.
	81	! Kind definition added to all floating point numbers.
	82	! lpm_init changed form a subroutine to a module.
	83	!
[1329]	84	! 1327 2014-03-21 11:00:16Z raasch
	85	! -netcdf_output
	86	!
[1323]	87	! 1322 2014-03-20 16:38:49Z raasch
	88	! REAL functions provided with KIND-attribute
	89	!
[1321]	90	! 1320 2014-03-20 08:40:49Z raasch
[1320]	91	! ONLY-attribute added to USE-statements,
	92	! kind-parameters added to all INTEGER and REAL declaration statements,
	93	! kinds are defined in new module kinds,
	94	! revision history before 2012 removed,
	95	! comment fields (!:) to be used for variable explanations added to
	96	! all variable declaration statements
	97	! bugfix: #if defined( __parallel ) added
[850]	98	!
[1315]	99	! 1314 2014-03-14 18:25:17Z suehring
	100	! Vertical logarithmic interpolation of horizontal particle speed for particles
	101	! between roughness height and first vertical grid level.
	102	!
[1093]	103	! 1092 2013-02-02 11:24:22Z raasch
	104	! unused variables removed
	105	!
[1037]	106	! 1036 2012-10-22 13:43:42Z raasch
	107	! code put under GPL (PALM 3.9)
	108	!
[850]	109	! 849 2012-03-15 10:35:09Z raasch
[849]	110	! routine renamed: init_particles -> lpm_init
	111	! de_dx, de_dy, de_dz are allocated here (instead of automatic arrays in
	112	! advec_particles),
	113	! sort_particles renamed lpm_sort_arrays, user_init_particles renamed lpm_init
[392]	114	!
[829]	115	! 828 2012-02-21 12:00:36Z raasch
	116	! call of init_kernels, particle feature color renamed class
	117	!
[826]	118	! 824 2012-02-17 09:09:57Z raasch
	119	! particle attributes speed_x\|y\|z_sgs renamed rvar1\|2\|3,
	120	! array particles implemented as pointer
	121	!
[668]	122	! 667 2010-12-23 12:06:00Z suehring/gryschka
	123	! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng for allocation
	124	! of arrays.
	125	!
[1]	126	! Revision 1.1 1999/11/25 16:22:38 raasch
	127	! Initial revision
	128	!
	129	!
	130	! Description:
	131	! ------------
[1682]	132	!> This routine initializes a set of particles and their attributes (position,
	133	!> radius, ..) which are used by the Lagrangian particle model (see lpm).
[1]	134	!------------------------------------------------------------------------------!
[1682]	135	MODULE lpm_init_mod
	136
[1]	137
[1320]	138	USE arrays_3d, &
	139	ONLY: de_dx, de_dy, de_dz, zu, zw, z0
	140
	141	USE control_parameters, &
[1691]	142	ONLY: cloud_droplets, constant_flux_layer, current_timestep_number, &
[1783]	143	dz, initializing_actions, message_string, ocean, simulated_time
[1320]	144
	145	USE grid_variables, &
[1359]	146	ONLY: ddx, dx, ddy, dy
[1320]	147
	148	USE indices, &
[1575]	149	ONLY: nx, nxl, nxlg, nxrg, nxr, ny, nyn, nys, nyng, nysg, nz, nzb, &
	150	nzb_w_inner, nzt
[1320]	151
	152	USE kinds
	153
	154	USE lpm_collision_kernels_mod, &
	155	ONLY: init_kernels
	156
[1783]	157	USE netcdf_interface, &
	158	ONLY: netcdf_data_format
	159
[1320]	160	USE particle_attributes, &
[1359]	161	ONLY: alloc_factor, bc_par_b, bc_par_lr, bc_par_ns, bc_par_t, &
	162	block_offset, block_offset_def, collision_kernel, &
[1831]	163	curvature_solution_effects, &
[1822]	164	density_ratio, grid_particles, &
[1359]	165	initial_weighting_factor, ibc_par_b, ibc_par_lr, ibc_par_ns, &
	166	ibc_par_t, iran_part, log_z_z0, &
	167	max_number_of_particle_groups, maximum_number_of_particles, &
[1822]	168	min_nr_particle, mpi_particle_type, &
	169	number_of_particles, &
[1320]	170	number_of_particle_groups, number_of_sublayers, &
[1822]	171	offset_ocean_nzt, offset_ocean_nzt_m1, &
[1359]	172	particles, particle_advection_start, particle_groups, &
	173	particle_groups_type, particles_per_point, &
[1822]	174	particle_type, pdx, pdy, pdz, &
[1359]	175	prt_count, psb, psl, psn, psr, pss, pst, &
[1320]	176	radius, random_start_position, read_particles_from_restartfile,&
[1929]	177	seed_follows_topography, sgs_wf_part, sort_count, &
[1822]	178	total_number_of_particles, &
	179	use_sgs_for_particles, &
[1359]	180	write_particle_statistics, uniform_particles, zero_particle, &
	181	z0_av_global
[1320]	182
[1]	183	USE pegrid
	184
[1320]	185	USE random_function_mod, &
	186	ONLY: random_function
[1]	187
[1359]	188	IMPLICIT NONE
[1320]	189
[1359]	190	PRIVATE
	191
[1682]	192	INTEGER(iwp), PARAMETER :: PHASE_INIT = 1 !<
	193	INTEGER(iwp), PARAMETER, PUBLIC :: PHASE_RELEASE = 2 !<
[1359]	194
	195	INTERFACE lpm_init
	196	MODULE PROCEDURE lpm_init
	197	END INTERFACE lpm_init
	198
	199	INTERFACE lpm_create_particle
	200	MODULE PROCEDURE lpm_create_particle
	201	END INTERFACE lpm_create_particle
	202
	203	PUBLIC lpm_init, lpm_create_particle
	204
[1929]	205	CONTAINS
[1359]	206
[1682]	207	!------------------------------------------------------------------------------!
	208	! Description:
	209	! ------------
	210	!> @todo Missing subroutine description.
	211	!------------------------------------------------------------------------------!
[1359]	212	SUBROUTINE lpm_init
	213
	214	USE lpm_collision_kernels_mod, &
	215	ONLY: init_kernels
	216
[1]	217	IMPLICIT NONE
	218
[1682]	219	INTEGER(iwp) :: i !<
	220	INTEGER(iwp) :: j !<
	221	INTEGER(iwp) :: k !<
[1320]	222
[1]	223	#if defined( __parallel )
[1682]	224	INTEGER(iwp), DIMENSION(3) :: blocklengths !<
	225	INTEGER(iwp), DIMENSION(3) :: displacements !<
	226	INTEGER(iwp), DIMENSION(3) :: types !<
[1]	227	#endif
	228
[1682]	229	REAL(wp) :: height_int !<
	230	REAL(wp) :: height_p !<
	231	REAL(wp) :: z_p !<
	232	REAL(wp) :: z0_av_local !<
[1]	233
	234	#if defined( __parallel )
	235	!
	236	!-- Define MPI derived datatype for FORTRAN datatype particle_type (see module
[82]	237	!-- particle_attributes). Integer length is 4 byte, Real is 8 byte
[1359]	238	blocklengths(1) = 19; blocklengths(2) = 6; blocklengths(3) = 1
	239	displacements(1) = 0; displacements(2) = 152; displacements(3) = 176
	240
[1]	241	types(1) = MPI_REAL
	242	types(2) = MPI_INTEGER
	243	types(3) = MPI_UB
	244	CALL MPI_TYPE_STRUCT( 3, blocklengths, displacements, types, &
	245	mpi_particle_type, ierr )
	246	CALL MPI_TYPE_COMMIT( mpi_particle_type, ierr )
	247	#endif
	248
	249	!
[150]	250	!-- In case of oceans runs, the vertical index calculations need an offset,
	251	!-- because otherwise the k indices will become negative
	252	IF ( ocean ) THEN
	253	offset_ocean_nzt = nzt
	254	offset_ocean_nzt_m1 = nzt - 1
	255	ENDIF
	256
[1359]	257	!
	258	!-- Define block offsets for dividing a gridcell in 8 sub cells
[150]	259
[1359]	260	block_offset(0) = block_offset_def (-1,-1,-1)
	261	block_offset(1) = block_offset_def (-1,-1, 0)
	262	block_offset(2) = block_offset_def (-1, 0,-1)
	263	block_offset(3) = block_offset_def (-1, 0, 0)
	264	block_offset(4) = block_offset_def ( 0,-1,-1)
	265	block_offset(5) = block_offset_def ( 0,-1, 0)
	266	block_offset(6) = block_offset_def ( 0, 0,-1)
	267	block_offset(7) = block_offset_def ( 0, 0, 0)
[150]	268	!
[1]	269	!-- Check the number of particle groups.
	270	IF ( number_of_particle_groups > max_number_of_particle_groups ) THEN
[274]	271	WRITE( message_string, * ) 'max_number_of_particle_groups =', &
	272	max_number_of_particle_groups , &
[254]	273	'&number_of_particle_groups reset to ', &
	274	max_number_of_particle_groups
[849]	275	CALL message( 'lpm_init', 'PA0213', 0, 1, 0, 6, 0 )
[1]	276	number_of_particle_groups = max_number_of_particle_groups
	277	ENDIF
	278
	279	!
	280	!-- Set default start positions, if necessary
[1359]	281	IF ( psl(1) == 9999999.9_wp ) psl(1) = -0.5_wp * dx
	282	IF ( psr(1) == 9999999.9_wp ) psr(1) = ( nx + 0.5_wp ) * dx
	283	IF ( pss(1) == 9999999.9_wp ) pss(1) = -0.5_wp * dy
	284	IF ( psn(1) == 9999999.9_wp ) psn(1) = ( ny + 0.5_wp ) * dy
	285	IF ( psb(1) == 9999999.9_wp ) psb(1) = zu(nz/2)
	286	IF ( pst(1) == 9999999.9_wp ) pst(1) = psb(1)
[1]	287
[1359]	288	IF ( pdx(1) == 9999999.9_wp .OR. pdx(1) == 0.0_wp ) pdx(1) = dx
	289	IF ( pdy(1) == 9999999.9_wp .OR. pdy(1) == 0.0_wp ) pdy(1) = dy
	290	IF ( pdz(1) == 9999999.9_wp .OR. pdz(1) == 0.0_wp ) pdz(1) = zu(2) - zu(1)
[1]	291
	292	DO j = 2, number_of_particle_groups
[1359]	293	IF ( psl(j) == 9999999.9_wp ) psl(j) = psl(j-1)
	294	IF ( psr(j) == 9999999.9_wp ) psr(j) = psr(j-1)
	295	IF ( pss(j) == 9999999.9_wp ) pss(j) = pss(j-1)
	296	IF ( psn(j) == 9999999.9_wp ) psn(j) = psn(j-1)
	297	IF ( psb(j) == 9999999.9_wp ) psb(j) = psb(j-1)
	298	IF ( pst(j) == 9999999.9_wp ) pst(j) = pst(j-1)
	299	IF ( pdx(j) == 9999999.9_wp .OR. pdx(j) == 0.0_wp ) pdx(j) = pdx(j-1)
	300	IF ( pdy(j) == 9999999.9_wp .OR. pdy(j) == 0.0_wp ) pdy(j) = pdy(j-1)
	301	IF ( pdz(j) == 9999999.9_wp .OR. pdz(j) == 0.0_wp ) pdz(j) = pdz(j-1)
[1]	302	ENDDO
	303
	304	!
[1929]	305	!-- Allocate arrays required for calculating particle SGS velocities.
	306	!-- Initialize prefactor required for stoachastic Weil equation.
[1822]	307	IF ( use_sgs_for_particles .AND. .NOT. cloud_droplets ) THEN
[849]	308	ALLOCATE( de_dx(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	309	de_dy(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	310	de_dz(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
[1929]	311
	312	sgs_wf_part = 1.0_wp / 3.0_wp
[849]	313	ENDIF
	314
	315	!
[1314]	316	!-- Allocate array required for logarithmic vertical interpolation of
	317	!-- horizontal particle velocities between the surface and the first vertical
	318	!-- grid level. In order to avoid repeated CPU cost-intensive CALLS of
	319	!-- intrinsic FORTRAN procedure LOG(z/z0), LOG(z/z0) is precalculated for
	320	!-- several heights. Splitting into 20 sublayers turned out to be sufficient.
	321	!-- To obtain exact height levels of particles, linear interpolation is applied
	322	!-- (see lpm_advec.f90).
[1691]	323	IF ( constant_flux_layer ) THEN
[1314]	324
	325	ALLOCATE ( log_z_z0(0:number_of_sublayers) )
	326	z_p = zu(nzb+1) - zw(nzb)
	327
	328	!
	329	!-- Calculate horizontal mean value of z0 used for logartihmic
	330	!-- interpolation. Note: this is not exact for heterogeneous z0.
	331	!-- However, sensitivity studies showed that the effect is
	332	!-- negligible.
	333	z0_av_local = SUM( z0(nys:nyn,nxl:nxr) )
[1359]	334	z0_av_global = 0.0_wp
[1314]	335
[1320]	336	#if defined( __parallel )
[1314]	337	CALL MPI_ALLREDUCE(z0_av_local, z0_av_global, 1, MPI_REAL, MPI_SUM, &
	338	comm2d, ierr )
[1320]	339	#else
	340	z0_av_global = z0_av_local
	341	#endif
[1314]	342
	343	z0_av_global = z0_av_global / ( ( ny + 1 ) * ( nx + 1 ) )
	344	!
	345	!-- Horizontal wind speed is zero below and at z0
[1359]	346	log_z_z0(0) = 0.0_wp
[1314]	347	!
	348	!-- Calculate vertical depth of the sublayers
[1322]	349	height_int = ( z_p - z0_av_global ) / REAL( number_of_sublayers, KIND=wp )
[1314]	350	!
	351	!-- Precalculate LOG(z/z0)
[1929]	352	height_p = z0_av_global
[1314]	353	DO k = 1, number_of_sublayers
	354
	355	height_p = height_p + height_int
	356	log_z_z0(k) = LOG( height_p / z0_av_global )
	357
	358	ENDDO
	359
	360	ENDIF
	361
	362	!
[1359]	363	!-- Check boundary condition and set internal variables
	364	SELECT CASE ( bc_par_b )
	365
	366	CASE ( 'absorb' )
	367	ibc_par_b = 1
	368
	369	CASE ( 'reflect' )
	370	ibc_par_b = 2
	371
	372	CASE DEFAULT
	373	WRITE( message_string, * ) 'unknown boundary condition ', &
	374	'bc_par_b = "', TRIM( bc_par_b ), '"'
	375	CALL message( 'lpm_init', 'PA0217', 1, 2, 0, 6, 0 )
	376
	377	END SELECT
	378	SELECT CASE ( bc_par_t )
	379
	380	CASE ( 'absorb' )
	381	ibc_par_t = 1
	382
	383	CASE ( 'reflect' )
	384	ibc_par_t = 2
	385
	386	CASE DEFAULT
	387	WRITE( message_string, * ) 'unknown boundary condition ', &
	388	'bc_par_t = "', TRIM( bc_par_t ), '"'
	389	CALL message( 'lpm_init', 'PA0218', 1, 2, 0, 6, 0 )
	390
	391	END SELECT
	392	SELECT CASE ( bc_par_lr )
	393
	394	CASE ( 'cyclic' )
	395	ibc_par_lr = 0
	396
	397	CASE ( 'absorb' )
	398	ibc_par_lr = 1
	399
	400	CASE ( 'reflect' )
	401	ibc_par_lr = 2
	402
	403	CASE DEFAULT
	404	WRITE( message_string, * ) 'unknown boundary condition ', &
	405	'bc_par_lr = "', TRIM( bc_par_lr ), '"'
	406	CALL message( 'lpm_init', 'PA0219', 1, 2, 0, 6, 0 )
	407
	408	END SELECT
	409	SELECT CASE ( bc_par_ns )
	410
	411	CASE ( 'cyclic' )
	412	ibc_par_ns = 0
	413
	414	CASE ( 'absorb' )
	415	ibc_par_ns = 1
	416
	417	CASE ( 'reflect' )
	418	ibc_par_ns = 2
	419
	420	CASE DEFAULT
	421	WRITE( message_string, * ) 'unknown boundary condition ', &
	422	'bc_par_ns = "', TRIM( bc_par_ns ), '"'
	423	CALL message( 'lpm_init', 'PA0220', 1, 2, 0, 6, 0 )
	424
	425	END SELECT
	426
	427	!
[828]	428	!-- Initialize collision kernels
	429	IF ( collision_kernel /= 'none' ) CALL init_kernels
	430
	431	!
[1]	432	!-- For the first model run of a possible job chain initialize the
[849]	433	!-- particles, otherwise read the particle data from restart file.
[1]	434	IF ( TRIM( initializing_actions ) == 'read_restart_data' &
	435	.AND. read_particles_from_restartfile ) THEN
	436
[849]	437	CALL lpm_read_restart_file
[1]	438
	439	ELSE
	440
	441	!
	442	!-- Allocate particle arrays and set attributes of the initial set of
	443	!-- particles, which can be also periodically released at later times.
[1359]	444	ALLOCATE( prt_count(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
	445	grid_particles(nzb+1:nzt,nys:nyn,nxl:nxr) )
[1]	446
[1359]	447	maximum_number_of_particles = 0
	448	number_of_particles = 0
[792]	449
	450	sort_count = 0
[1359]	451	prt_count = 0
[792]	452
[1]	453	!
	454	!-- Initialize all particles with dummy values (otherwise errors may
	455	!-- occur within restart runs). The reason for this is still not clear
	456	!-- and may be presumably caused by errors in the respective user-interface.
[1359]	457	zero_particle = particle_type( 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	458	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	459	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, &
	460	0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp, 0, 0, 0, &
[1929]	461	0, .FALSE., -1 )
[1822]	462
[1359]	463	particle_groups = particle_groups_type( 0.0_wp, 0.0_wp, 0.0_wp, 0.0_wp )
[1]	464
	465	!
	466	!-- Set values for the density ratio and radius for all particle
	467	!-- groups, if necessary
[1359]	468	IF ( density_ratio(1) == 9999999.9_wp ) density_ratio(1) = 0.0_wp
	469	IF ( radius(1) == 9999999.9_wp ) radius(1) = 0.0_wp
[1]	470	DO i = 2, number_of_particle_groups
[1359]	471	IF ( density_ratio(i) == 9999999.9_wp ) THEN
[1]	472	density_ratio(i) = density_ratio(i-1)
	473	ENDIF
[1359]	474	IF ( radius(i) == 9999999.9_wp ) radius(i) = radius(i-1)
[1]	475	ENDDO
	476
	477	DO i = 1, number_of_particle_groups
[1359]	478	IF ( density_ratio(i) /= 0.0_wp .AND. radius(i) == 0 ) THEN
[254]	479	WRITE( message_string, * ) 'particle group #', i, 'has a', &
	480	'density ratio /= 0 but radius = 0'
[849]	481	CALL message( 'lpm_init', 'PA0215', 1, 2, 0, 6, 0 )
[1]	482	ENDIF
	483	particle_groups(i)%density_ratio = density_ratio(i)
	484	particle_groups(i)%radius = radius(i)
	485	ENDDO
	486
	487	!
[1359]	488	!-- Set a seed value for the random number generator to be exclusively
	489	!-- used for the particle code. The generated random numbers should be
	490	!-- different on the different PEs.
	491	iran_part = iran_part + myid
	492
[1725]	493	CALL lpm_create_particle (PHASE_INIT)
[1359]	494	!
	495	!-- User modification of initial particles
	496	CALL user_lpm_init
	497
	498	!
	499	!-- Open file for statistical informations about particle conditions
	500	IF ( write_particle_statistics ) THEN
	501	CALL check_open( 80 )
	502	WRITE ( 80, 8000 ) current_timestep_number, simulated_time, &
	503	number_of_particles, &
	504	maximum_number_of_particles
	505	CALL close_file( 80 )
	506	ENDIF
	507
	508	ENDIF
	509
	510	!
	511	!-- To avoid programm abort, assign particles array to the local version of
	512	!-- first grid cell
	513	number_of_particles = prt_count(nzb+1,nys,nxl)
	514	particles => grid_particles(nzb+1,nys,nxl)%particles(1:number_of_particles)
	515	!
	516	!-- Formats
	517	8000 FORMAT (I6,1X,F7.2,4X,I10,71X,I10)
	518
	519	END SUBROUTINE lpm_init
	520
[1682]	521	!------------------------------------------------------------------------------!
	522	! Description:
	523	! ------------
	524	!> @todo Missing subroutine description.
	525	!------------------------------------------------------------------------------!
[1359]	526	SUBROUTINE lpm_create_particle (phase)
	527
	528	USE lpm_exchange_horiz_mod, &
	529	ONLY: lpm_exchange_horiz, lpm_move_particle, realloc_particles_array
	530
	531	USE lpm_pack_arrays_mod, &
	532	ONLY: lpm_pack_all_arrays
	533
[1871]	534	USE particle_attributes, &
[1929]	535	ONLY: deleted_particles, monodisperse_aerosols
[1871]	536
[1359]	537	IMPLICIT NONE
	538
[1929]	539	INTEGER(iwp) :: alloc_size !< relative increase of allocated memory for particles
	540	INTEGER(iwp) :: i !< loop variable ( particle groups )
	541	INTEGER(iwp) :: ip !< index variable along x
	542	INTEGER(iwp) :: j !< loop variable ( particles per point )
	543	INTEGER(iwp) :: jp !< index variable along y
	544	INTEGER(iwp) :: kp !< index variable along z
	545	INTEGER(iwp) :: loop_stride !< loop variable for initialization
	546	INTEGER(iwp) :: n !< loop variable ( number of particles )
	547	INTEGER(iwp) :: new_size !< new size of allocated memory for particles
[1359]	548
[1929]	549	INTEGER(iwp), INTENT(IN) :: phase !< mode of inititialization
[1359]	550
[1929]	551	INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: local_count !< start address of new particle
	552	INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: local_start !< start address of new particle
[1359]	553
[1929]	554	LOGICAL :: first_stride !< flag for initialization
[1359]	555
[1929]	556	REAL(wp) :: pos_x !< increment for particle position in x
	557	REAL(wp) :: pos_y !< increment for particle position in y
	558	REAL(wp) :: pos_z !< increment for particle position in z
	559	REAL(wp) :: rand_contr !< dummy argument for random position
[1359]	560
[1929]	561	TYPE(particle_type),TARGET :: tmp_particle !< temporary particle used for initialization
[1359]	562
	563	!
	564	!-- Calculate particle positions and store particle attributes, if
	565	!-- particle is situated on this PE
	566	DO loop_stride = 1, 2
	567	first_stride = (loop_stride == 1)
	568	IF ( first_stride ) THEN
	569	local_count = 0 ! count number of particles
	570	ELSE
	571	local_count = prt_count ! Start address of new particles
	572	ENDIF
	573
[1]	574	n = 0
	575	DO i = 1, number_of_particle_groups
	576
	577	pos_z = psb(i)
	578
	579	DO WHILE ( pos_z <= pst(i) )
	580
	581	pos_y = pss(i)
	582
	583	DO WHILE ( pos_y <= psn(i) )
	584
[1359]	585	IF ( pos_y >= ( nys - 0.5_wp ) * dy .AND. &
	586	pos_y < ( nyn + 0.5_wp ) * dy ) THEN
[1]	587
	588	pos_x = psl(i)
	589
[1575]	590	xloop: DO WHILE ( pos_x <= psr(i) )
[1]	591
[1359]	592	IF ( pos_x >= ( nxl - 0.5_wp ) * dx .AND. &
	593	pos_x < ( nxr + 0.5_wp ) * dx ) THEN
[1]	594
	595	DO j = 1, particles_per_point
	596
	597	n = n + 1
[1359]	598	tmp_particle%x = pos_x
	599	tmp_particle%y = pos_y
	600	tmp_particle%z = pos_z
	601	tmp_particle%age = 0.0_wp
	602	tmp_particle%age_m = 0.0_wp
	603	tmp_particle%dt_sum = 0.0_wp
[1822]	604	tmp_particle%dvrp_psize = 0.0_wp !unused
[1359]	605	tmp_particle%e_m = 0.0_wp
[824]	606	IF ( curvature_solution_effects ) THEN
	607	!
	608	!-- Initial values (internal timesteps, derivative)
	609	!-- for Rosenbrock method
[1871]	610	tmp_particle%rvar1 = 1.0E-6_wp !last Rosenbrock timestep
	611	tmp_particle%rvar2 = 0.1E-6_wp !dry aerosol radius
	612	tmp_particle%rvar3 = -9999999.9_wp !unused
[824]	613	ELSE
	614	!
	615	!-- Initial values for SGS velocities
[1359]	616	tmp_particle%rvar1 = 0.0_wp
	617	tmp_particle%rvar2 = 0.0_wp
	618	tmp_particle%rvar3 = 0.0_wp
[824]	619	ENDIF
[1359]	620	tmp_particle%speed_x = 0.0_wp
	621	tmp_particle%speed_y = 0.0_wp
	622	tmp_particle%speed_z = 0.0_wp
	623	tmp_particle%origin_x = pos_x
	624	tmp_particle%origin_y = pos_y
	625	tmp_particle%origin_z = pos_z
	626	tmp_particle%radius = particle_groups(i)%radius
	627	tmp_particle%weight_factor = initial_weighting_factor
	628	tmp_particle%class = 1
	629	tmp_particle%group = i
[1822]	630	tmp_particle%tailpoints = 0 !unused
[1359]	631	tmp_particle%particle_mask = .TRUE.
[1822]	632	tmp_particle%tail_id = 0 !unused
	633
[1929]	634
[1]	635	!
[1575]	636	!-- Determine the grid indices of the particle position
[1359]	637	ip = ( tmp_particle%x + 0.5_wp * dx ) * ddx
	638	jp = ( tmp_particle%y + 0.5_wp * dy ) * ddy
[1685]	639	kp = tmp_particle%z / dz + 1 + offset_ocean_nzt
[1]	640
[1575]	641	IF ( seed_follows_topography ) THEN
	642	!
	643	!-- Particle height is given relative to topography
	644	kp = kp + nzb_w_inner(jp,ip)
[1929]	645	tmp_particle%z = tmp_particle%z + &
	646	zw(nzb_w_inner(jp,ip))
[1575]	647	IF ( kp > nzt ) THEN
	648	pos_x = pos_x + pdx(i)
	649	CYCLE xloop
	650	ENDIF
[1929]	651	ELSEIF ( .NOT. seed_follows_topography .AND. &
	652	tmp_particle%z <= zw(nzb_w_inner(jp,ip)) ) THEN
	653	pos_x = pos_x + pdx(i)
	654	CYCLE xloop
[1575]	655	ENDIF
	656
[1359]	657	local_count(kp,jp,ip) = local_count(kp,jp,ip) + 1
	658	IF ( .NOT. first_stride ) THEN
	659	IF ( ip < nxl .OR. jp < nys .OR. kp < nzb+1 ) THEN
	660	write(6,*) 'xl ',ip,jp,kp,nxl,nys,nzb+1
	661	ENDIF
	662	IF ( ip > nxr .OR. jp > nyn .OR. kp > nzt ) THEN
	663	write(6,*) 'xu ',ip,jp,kp,nxr,nyn,nzt
	664	ENDIF
	665	grid_particles(kp,jp,ip)%particles(local_count(kp,jp,ip)) = tmp_particle
[1929]	666
[1359]	667	ENDIF
[1]	668	ENDDO
	669
	670	ENDIF
	671
	672	pos_x = pos_x + pdx(i)
	673
[1575]	674	ENDDO xloop
[1]	675
	676	ENDIF
	677
	678	pos_y = pos_y + pdy(i)
	679
	680	ENDDO
	681
	682	pos_z = pos_z + pdz(i)
	683
	684	ENDDO
	685
	686	ENDDO
	687
[1359]	688	IF ( first_stride ) THEN
	689	DO ip = nxl, nxr
	690	DO jp = nys, nyn
	691	DO kp = nzb+1, nzt
	692	IF ( phase == PHASE_INIT ) THEN
	693	IF ( local_count(kp,jp,ip) > 0 ) THEN
	694	alloc_size = MAX( INT( local_count(kp,jp,ip) * &
	695	( 1.0_wp + alloc_factor / 100.0_wp ) ), &
	696	min_nr_particle )
	697	ELSE
	698	alloc_size = min_nr_particle
	699	ENDIF
	700	ALLOCATE(grid_particles(kp,jp,ip)%particles(1:alloc_size))
	701	DO n = 1, alloc_size
	702	grid_particles(kp,jp,ip)%particles(n) = zero_particle
	703	ENDDO
	704	ELSEIF ( phase == PHASE_RELEASE ) THEN
	705	IF ( local_count(kp,jp,ip) > 0 ) THEN
	706	new_size = local_count(kp,jp,ip) + prt_count(kp,jp,ip)
	707	alloc_size = MAX( INT( new_size * ( 1.0_wp + &
	708	alloc_factor / 100.0_wp ) ), min_nr_particle )
	709	IF( alloc_size > SIZE( grid_particles(kp,jp,ip)%particles) ) THEN
	710	CALL realloc_particles_array(ip,jp,kp,alloc_size)
	711	ENDIF
	712	ENDIF
	713	ENDIF
[1929]	714
[1359]	715	ENDDO
	716	ENDDO
	717	ENDDO
	718	ENDIF
[1929]	719
[1359]	720	ENDDO
[1]	721
[1359]	722	local_start = prt_count+1
	723	prt_count = local_count
[1871]	724
[1]	725	!
[1871]	726	!-- Initialize aerosol background spectrum
	727	IF ( curvature_solution_effects .AND. .NOT. monodisperse_aerosols ) THEN
	728	CALL lpm_init_aerosols(local_start)
	729	ENDIF
	730
	731	!
[1929]	732	!-- Add random fluctuation to particle positions.
[1359]	733	IF ( random_start_position ) THEN
	734	DO ip = nxl, nxr
	735	DO jp = nys, nyn
	736	DO kp = nzb+1, nzt
	737	number_of_particles = prt_count(kp,jp,ip)
	738	IF ( number_of_particles <= 0 ) CYCLE
	739	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
[1929]	740	!
	741	!-- Move only new particles. Moreover, limit random fluctuation
	742	!-- in order to prevent that particles move more than one grid box,
	743	!-- which would lead to problems concerning particle exchange
	744	!-- between processors in case pdx/pdy are larger than dx/dy,
	745	!-- respectively.
	746	DO n = local_start(kp,jp,ip), number_of_particles
[1359]	747	IF ( psl(particles(n)%group) /= psr(particles(n)%group) ) THEN
[1929]	748	rand_contr = ( random_function( iran_part ) - 0.5_wp ) * &
	749	pdx(particles(n)%group)
[1359]	750	particles(n)%x = particles(n)%x + &
[1929]	751	MERGE( rand_contr, SIGN( dx, rand_contr ), &
	752	ABS( rand_contr ) < dx &
	753	)
[1359]	754	ENDIF
	755	IF ( pss(particles(n)%group) /= psn(particles(n)%group) ) THEN
[1929]	756	rand_contr = ( random_function( iran_part ) - 0.5_wp ) * &
	757	pdy(particles(n)%group)
[1359]	758	particles(n)%y = particles(n)%y + &
[1929]	759	MERGE( rand_contr, SIGN( dy, rand_contr ), &
	760	ABS( rand_contr ) < dy &
	761	)
[1359]	762	ENDIF
	763	IF ( psb(particles(n)%group) /= pst(particles(n)%group) ) THEN
[1929]	764	rand_contr = ( random_function( iran_part ) - 0.5_wp ) * &
	765	pdz(particles(n)%group)
[1359]	766	particles(n)%z = particles(n)%z + &
[1929]	767	MERGE( rand_contr, SIGN( dz, rand_contr ), &
	768	ABS( rand_contr ) < dz &
	769	)
[1359]	770	ENDIF
	771	ENDDO
[1]	772	!
[1929]	773	!-- Identify particles located outside the model domain and reflect
	774	!-- or absorb them if necessary.
[1359]	775	CALL lpm_boundary_conds( 'bottom/top' )
[1929]	776	!
	777	!-- Furthermore, remove particles located in topography. Note, as
	778	!-- the particle speed is still zero at this point, wall
	779	!-- reflection boundary conditions will not work in this case.
	780	particles => &
	781	grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	782	DO n = local_start(kp,jp,ip), number_of_particles
	783	i = ( particles(n)%x + 0.5_wp * dx ) * ddx
	784	j = ( particles(n)%y + 0.5_wp * dy ) * ddy
	785	IF ( particles(n)%z <= zw(nzb_w_inner(j,i)) ) THEN
	786	particles(n)%particle_mask = .FALSE.
	787	deleted_particles = deleted_particles + 1
	788	ENDIF
	789	ENDDO
[1359]	790	ENDDO
	791	ENDDO
	792	ENDDO
[1]	793	!
[1359]	794	!-- Exchange particles between grid cells and processors
	795	CALL lpm_move_particle
	796	CALL lpm_exchange_horiz
[1]	797
[1359]	798	ENDIF
[1]	799	!
[1359]	800	!-- In case of random_start_position, delete particles identified by
	801	!-- lpm_exchange_horiz and lpm_boundary_conds. Then sort particles into blocks,
	802	!-- which is needed for a fast interpolation of the LES fields on the particle
	803	!-- position.
	804	CALL lpm_pack_all_arrays
[1]	805
	806	!
[1359]	807	!-- Determine maximum number of particles (i.e., all possible particles that
	808	!-- have been allocated) and the current number of particles
	809	DO ip = nxl, nxr
	810	DO jp = nys, nyn
	811	DO kp = nzb+1, nzt
	812	maximum_number_of_particles = maximum_number_of_particles &
	813	+ SIZE(grid_particles(kp,jp,ip)%particles)
	814	number_of_particles = number_of_particles &
	815	+ prt_count(kp,jp,ip)
[1]	816	ENDDO
[1359]	817	ENDDO
	818	ENDDO
[1]	819	!
[1822]	820	!-- Calculate the number of particles of the total domain
[1]	821	#if defined( __parallel )
[1359]	822	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
	823	CALL MPI_ALLREDUCE( number_of_particles, total_number_of_particles, 1, &
	824	MPI_INTEGER, MPI_SUM, comm2d, ierr )
[1]	825	#else
[1359]	826	total_number_of_particles = number_of_particles
[1]	827	#endif
	828
[1359]	829	RETURN
[1]	830
[1359]	831	END SUBROUTINE lpm_create_particle
[336]	832
[1871]	833	SUBROUTINE lpm_init_aerosols(local_start)
	834
	835	USE arrays_3d, &
	836	ONLY: hyp, pt, q
	837
	838	USE cloud_parameters, &
	839	ONLY: l_d_rv, rho_l
	840
	841	USE constants, &
	842	ONLY: pi
	843
	844	USE kinds
	845
	846	USE particle_attributes, &
	847	ONLY: init_aerosol_probabilistic, molecular_weight_of_solute, &
	848	molecular_weight_of_water, n1, n2, n3, rho_s, rm1, rm2, rm3, &
	849	s1, s2, s3, vanthoff
	850
	851	IMPLICIT NONE
	852
	853	REAL(wp), DIMENSION(:), ALLOCATABLE :: cdf !< CDF of aerosol spectrum
	854	REAL(wp), DIMENSION(:), ALLOCATABLE :: r_temp !< dry aerosol radius spectrum
	855
	856	REAL(wp) :: bfactor !< solute effects
	857	REAL(wp) :: dr !< width of radius bin
	858	REAL(wp) :: e_a !< vapor pressure
	859	REAL(wp) :: e_s !< saturation vapor pressure
	860	REAL(wp) :: n_init !< sum of all aerosol concentrations
	861	REAL(wp) :: pdf !< PDF of aerosol spectrum
	862	REAL(wp) :: rmin = 1.0e-8_wp !< minimum aerosol radius
	863	REAL(wp) :: rmax = 1.0e-6_wp !< maximum aerosol radius
	864	REAL(wp) :: rs_rand !< random number
	865	REAL(wp) :: r_mid !< mean radius
	866	REAL(wp) :: t_int !< temperature
	867	REAL(wp) :: weight_sum !< sum of all weighting factors
	868
[1890]	869	INTEGER(iwp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg), INTENT(IN) :: local_start !<
[1871]	870
	871	INTEGER(iwp) :: n !<
	872	INTEGER(iwp) :: nn !<
	873	INTEGER(iwp) :: no_bins = 999 !< number of bins
	874	INTEGER(iwp) :: ip !<
	875	INTEGER(iwp) :: jp !<
	876	INTEGER(iwp) :: kp !<
	877
	878	LOGICAL :: new_pdf = .FALSE. !< check if aerosol PDF has to be recalculated
	879
	880	!
	881	!-- Compute aerosol background distribution
	882	IF ( init_aerosol_probabilistic ) THEN
	883	ALLOCATE( cdf(0:no_bins), r_temp(0:no_bins) )
	884	DO n = 0, no_bins
	885	r_temp(n) = EXP( LOG(rmin) + ( LOG(rmax) - LOG(rmin ) ) / &
	886	REAL(no_bins, KIND=wp) * REAL(n, KIND=wp) )
	887
	888	cdf(n) = 0.0_wp
	889	n_init = n1 + n2 + n3
	890	IF ( n1 > 0.0_wp ) THEN
	891	cdf(n) = cdf(n) + n1 / n_init * ( 0.5_wp + 0.5_wp * &
	892	ERF( LOG( r_temp(n) / rm1 ) / &
	893	( SQRT(2.0_wp) * LOG(s1) ) &
	894	) )
	895	ENDIF
	896	IF ( n2 > 0.0_wp ) THEN
	897	cdf(n) = cdf(n) + n2 / n_init * ( 0.5_wp + 0.5_wp * &
	898	ERF( LOG( r_temp(n) / rm2 ) / &
	899	( SQRT(2.0_wp) * LOG(s2) ) &
	900	) )
	901	ENDIF
	902	IF ( n3 > 0.0_wp ) THEN
	903	cdf(n) = cdf(n) + n3 / n_init * ( 0.5_wp + 0.5_wp * &
	904	ERF( LOG( r_temp(n) / rm3 ) / &
	905	( SQRT(2.0_wp) * LOG(s3) ) &
	906	) )
	907	ENDIF
	908
	909	ENDDO
	910	ENDIF
	911
	912	DO ip = nxl, nxr
	913	DO jp = nys, nyn
	914	DO kp = nzb+1, nzt
	915
	916	number_of_particles = prt_count(kp,jp,ip)
	917	IF ( number_of_particles <= 0 ) CYCLE
	918	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	919	!
	920	!-- Initialize the aerosols with a predefined spectral distribution
	921	!-- of the dry radius (logarithmically increasing bins) and a varying
	922	!-- weighting factor
	923	IF ( .NOT. init_aerosol_probabilistic ) THEN
	924
	925	new_pdf = .FALSE.
	926	IF ( .NOT. ALLOCATED( r_temp ) ) THEN
	927	new_pdf = .TRUE.
	928	ELSE
	929	IF ( SIZE( r_temp ) .NE. &
	930	number_of_particles - local_start(kp,jp,ip) + 2 ) THEN
	931	new_pdf = .TRUE.
	932	DEALLOCATE( r_temp )
	933	ENDIF
	934	ENDIF
	935
	936	IF ( new_pdf ) THEN
	937
	938	no_bins = number_of_particles + 1 - local_start(kp,jp,ip)
	939	ALLOCATE( r_temp(0:no_bins) )
	940
	941	DO n = 0, no_bins
	942	r_temp(n) = EXP( LOG(rmin) + ( LOG(rmax) - LOG(rmin ) ) / &
	943	REAL(no_bins, KIND=wp) * &
	944	REAL(n, KIND=wp) )
	945	ENDDO
	946
	947	ENDIF
	948
	949	!
	950	!-- Calculate radius and concentration of each aerosol
	951	DO n = local_start(kp,jp,ip), number_of_particles
	952
	953	nn = n - local_start(kp,jp,ip)
	954
	955	r_mid = SQRT( r_temp(nn) * r_temp(nn+1) )
	956	dr = r_temp(nn+1) - r_temp(nn)
	957
	958	pdf = 0.0_wp
	959	n_init = n1 + n2 + n3
	960	IF ( n1 > 0.0_wp ) THEN
	961	pdf = pdf + n1 / n_init * ( 1.0_wp / ( r_mid * LOG(s1) * &
	962	SQRT( 2.0_wp * pi ) &
	963	) * &
	964	EXP( -( LOG( r_mid / rm1 ) )**2 / &
	965	( 2.0_wp * LOG(s1)**2 ) &
	966	) &
	967	)
	968	ENDIF
	969	IF ( n2 > 0.0_wp ) THEN
	970	pdf = pdf + n2 / n_init * ( 1.0_wp / ( r_mid * LOG(s2) * &
	971	SQRT( 2.0_wp * pi ) &
	972	) * &
	973	EXP( -( LOG( r_mid / rm2 ) )**2 / &
	974	( 2.0_wp * LOG(s2)**2 ) &
	975	) &
	976	)
	977	ENDIF
	978	IF ( n3 > 0.0_wp ) THEN
	979	pdf = pdf + n3 / n_init * ( 1.0_wp / ( r_mid * LOG(s3) * &
	980	SQRT( 2.0_wp * pi ) &
	981	) * &
	982	EXP( -( LOG( r_mid / rm3 ) )**2 / &
	983	( 2.0_wp * LOG(s3)**2 ) &
	984	) &
	985	)
	986	ENDIF
	987
	988	particles(n)%rvar2 = r_mid
	989	particles(n)%weight_factor = pdf * dr
	990
	991	END DO
	992	!
	993	!-- Adjust weighting factors to initialize the same number of aerosols
	994	!-- in every grid box
	995	weight_sum = SUM(particles(local_start(kp,jp,ip):number_of_particles)%weight_factor)
	996
	997	particles(local_start(kp,jp,ip):number_of_particles)%weight_factor = &
	998	particles(local_start(kp,jp,ip):number_of_particles)%weight_factor / &
	999	weight_sum * initial_weighting_factor * ( no_bins + 1 )
	1000
	1001	ENDIF
	1002	!
	1003	!-- Initialize the aerosols with a predefined weighting factor but
	1004	!-- a randomly choosen dry radius
	1005	IF ( init_aerosol_probabilistic ) THEN
	1006
	1007	DO n = local_start(kp,jp,ip), number_of_particles !only new particles
	1008
	1009	rs_rand = -1.0_wp
	1010	DO WHILE ( rs_rand .LT. cdf(0) .OR. rs_rand .GE. cdf(no_bins) )
	1011	rs_rand = random_function( iran_part )
	1012	ENDDO
	1013	!
	1014	!-- Determine aerosol dry radius by a random number generator
	1015	DO nn = 0, no_bins-1
	1016	IF ( cdf(nn) .LE. rs_rand .AND. cdf(nn+1) .GT. rs_rand ) THEN
	1017	particles(n)%rvar2 = r_temp(nn) + ( r_temp(nn+1) - r_temp(nn) ) / &
	1018	( cdf(nn+1) - cdf(nn) ) * ( rs_rand - cdf(nn) )
	1019	EXIT
	1020	ENDIF
	1021	ENDDO
	1022
	1023	ENDDO
	1024
	1025	ENDIF
	1026
	1027	!
	1028	!-- Set particle radius to equilibrium radius based on the environmental
	1029	!-- supersaturation (Khvorostyanov and Curry, 2007, JGR). This avoids
	1030	!-- the sometimes lengthy growth toward their equilibrium radius within
	1031	!-- the simulation.
	1032	t_int = pt(kp,jp,ip) * ( hyp(kp) / 100000.0_wp )**0.286_wp
	1033
	1034	e_s = 611.0_wp * EXP( l_d_rv * ( 3.6609E-3_wp - 1.0_wp / t_int ) )
	1035	e_a = q(kp,jp,ip) * hyp(kp) / ( 0.378_wp * q(kp,jp,ip) + 0.622_wp )
	1036
	1037	!
[1890]	1038	!-- The formula is only valid for subsaturated environments. For
	1039	!-- supersaturations higher than -1 %, the supersaturation is set to -1%.
	1040	IF ( e_a / e_s < 0.99_wp ) THEN
[1871]	1041
	1042	DO n = local_start(kp,jp,ip), number_of_particles !only new particles
	1043
	1044	bfactor = vanthoff * molecular_weight_of_water * &
	1045	rho_s * particles(n)%rvar2**3 / &
	1046	( molecular_weight_of_solute * rho_l )
	1047	particles(n)%radius = particles(n)%rvar2 * ( bfactor / &
	1048	particles(n)%rvar23 )(1.0_wp/3.0_wp) *&
	1049	( 1.0_wp - e_a / e_s )**(-1.0_wp/3.0_wp)
	1050
	1051	ENDDO
	1052
[1890]	1053	ELSE
	1054
	1055	DO n = local_start(kp,jp,ip), number_of_particles !only new particles
	1056
	1057	bfactor = vanthoff * molecular_weight_of_water * &
	1058	rho_s * particles(n)%rvar2**3 / &
	1059	( molecular_weight_of_solute * rho_l )
	1060	particles(n)%radius = particles(n)%rvar2 * ( bfactor / &
	1061	particles(n)%rvar23 )(1.0_wp/3.0_wp) *&
	1062	0.01_wp**(-1.0_wp/3.0_wp)
	1063
	1064	ENDDO
	1065
[1871]	1066	ENDIF
	1067
	1068	ENDDO
	1069	ENDDO
	1070	ENDDO
	1071	!
	1072	!-- Deallocate used arrays
	1073	IF ( ALLOCATED(r_temp) ) DEALLOCATE( r_temp )
	1074	IF ( ALLOCATED(cdf) ) DEALLOCATE( cdf )
	1075
	1076	END SUBROUTINE lpm_init_aerosols
	1077
[1359]	1078	END MODULE lpm_init_mod

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