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source: palm/trunk/SOURCE/init_3d_model.f90 @ 1428

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1	SUBROUTINE init_3d_model
2
3	!--------------------------------------------------------------------------------!
4	! This file is part of PALM.
5	!
6	! PALM is free software: you can redistribute it and/or modify it under the terms
7	! of the GNU General Public License as published by the Free Software Foundation,
8	! either version 3 of the License, or (at your option) any later version.
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	!
17	! Copyright 1997-2014 Leibniz Universitaet Hannover
18	!--------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: init_3d_model.f90 1412 2014-05-26 16:07:53Z maronga $
27	!
28	! 1411 2014-05-16 18:01:51Z suehring
29	! Initial horizontal velocity profiles were not set to zero at the first vertical
30	! grid level in case of non-cyclic lateral boundary conditions.
31	!
32	! 1406 2014-05-16 13:47:01Z raasch
33	! bugfix: setting of initial velocities at k=1 to zero not in case of a
34	! no-slip boundary condition for uv
35	!
36	! 1402 2014-05-09 14:25:13Z raasch
37	! location messages modified
38	!
39	! 1400 2014-05-09 14:03:54Z knoop
40	! Parallel random number generator added
41	!
42	! 1384 2014-05-02 14:31:06Z raasch
43	! location messages added
44	!
45	! 1361 2014-04-16 15:17:48Z hoffmann
46	! tend_* removed
47	! Bugfix: w_subs is not allocated anymore if it is already allocated
48	!
49	! 1359 2014-04-11 17:15:14Z hoffmann
50	! module lpm_init_mod added to use statements, because lpm_init has become a
51	! module
52	!
53	! 1353 2014-04-08 15:21:23Z heinze
54	! REAL constants provided with KIND-attribute
55	!
56	! 1340 2014-03-25 19:45:13Z kanani
57	! REAL constants defined as wp-kind
58	!
59	! 1322 2014-03-20 16:38:49Z raasch
60	! REAL constants defined as wp-kind
61	! module interfaces removed
62	!
63	! 1320 2014-03-20 08:40:49Z raasch
64	! ONLY-attribute added to USE-statements,
65	! kind-parameters added to all INTEGER and REAL declaration statements,
66	! kinds are defined in new module kinds,
67	! revision history before 2012 removed,
68	! comment fields (!:) to be used for variable explanations added to
69	! all variable declaration statements
70	!
71	! 1316 2014-03-17 07:44:59Z heinze
72	! Bugfix: allocation of w_subs
73	!
74	! 1299 2014-03-06 13:15:21Z heinze
75	! Allocate w_subs due to extension of large scale subsidence in combination
76	! with large scale forcing data (LSF_DATA)
77	!
78	! 1241 2013-10-30 11:36:58Z heinze
79	! Overwrite initial profiles in case of nudging
80	! Inititialize shf and qsws in case of large_scale_forcing
81	!
82	! 1221 2013-09-10 08:59:13Z raasch
83	! +rflags_s_inner in copyin statement, use copyin for most arrays instead of
84	! copy
85	!
86	! 1212 2013-08-15 08:46:27Z raasch
87	! array tri is allocated and included in data copy statement
88	!
89	! 1195 2013-07-01 12:27:57Z heinze
90	! Bugfix: move allocation of ref_state to parin.f90 and read_var_list.f90
91	!
92	! 1179 2013-06-14 05:57:58Z raasch
93	! allocate and set ref_state to be used in buoyancy terms
94	!
95	! 1171 2013-05-30 11:27:45Z raasch
96	! diss array is allocated with full size if accelerator boards are used
97	!
98	! 1159 2013-05-21 11:58:22Z fricke
99	! -bc_lr_dirneu, bc_lr_neudir, bc_ns_dirneu, bc_ns_neudir
100	!
101	! 1153 2013-05-10 14:33:08Z raasch
102	! diss array is allocated with dummy elements even if it is not needed
103	! (required by PGI 13.4 / CUDA 5.0)
104	!
105	! 1115 2013-03-26 18:16:16Z hoffmann
106	! unused variables removed
107	!
108	! 1113 2013-03-10 02:48:14Z raasch
109	! openACC directive modified
110	!
111	! 1111 2013-03-08 23:54:10Z raasch
112	! openACC directives added for pres
113	! array diss allocated only if required
114	!
115	! 1092 2013-02-02 11:24:22Z raasch
116	! unused variables removed
117	!
118	! 1065 2012-11-22 17:42:36Z hoffmann
119	! allocation of diss (dissipation rate) in case of turbulence = .TRUE. added
120	!
121	! 1053 2012-11-13 17:11:03Z hoffmann
122	! allocation and initialisation of necessary data arrays for the two-moment
123	! cloud physics scheme the two new prognostic equations (nr, qr):
124	! +dr, lambda_r, mu_r, sed_, xr, s, sws, swst, , _p, t_m, _1, _2, _3,
125	! +tend_*, prr
126	!
127	! 1036 2012-10-22 13:43:42Z raasch
128	! code put under GPL (PALM 3.9)
129	!
130	! 1032 2012-10-21 13:03:21Z letzel
131	! save memory by not allocating pt_2 in case of neutral = .T.
132	!
133	! 1025 2012-10-07 16:04:41Z letzel
134	! bugfix: swap indices of mask for ghost boundaries
135	!
136	! 1015 2012-09-27 09:23:24Z raasch
137	! mask is set to zero for ghost boundaries
138	!
139	! 1010 2012-09-20 07:59:54Z raasch
140	! cpp switch __nopointer added for pointer free version
141	!
142	! 1003 2012-09-14 14:35:53Z raasch
143	! nxra,nyna, nzta replaced ny nxr, nyn, nzt
144	!
145	! 1001 2012-09-13 14:08:46Z raasch
146	! all actions concerning leapfrog scheme removed
147	!
148	! 996 2012-09-07 10:41:47Z raasch
149	! little reformatting
150	!
151	! 978 2012-08-09 08:28:32Z fricke
152	! outflow damping layer removed
153	! roughness length for scalar quantites z0h added
154	! damping zone for the potential temperatur in case of non-cyclic lateral
155	! boundaries added
156	! initialization of ptdf_x, ptdf_y
157	! initialization of c_u_m, c_u_m_l, c_v_m, c_v_m_l, c_w_m, c_w_m_l
158	!
159	! 849 2012-03-15 10:35:09Z raasch
160	! init_particles renamed lpm_init
161	!
162	! 825 2012-02-19 03:03:44Z raasch
163	! wang_collision_kernel renamed wang_kernel
164	!
165	! Revision 1.1 1998/03/09 16:22:22 raasch
166	! Initial revision
167	!
168	!
169	! Description:
170	! ------------
171	! Allocation of arrays and initialization of the 3D model via
172	! a) pre-run the 1D model
173	! or
174	! b) pre-set constant linear profiles
175	! or
176	! c) read values of a previous run
177	!------------------------------------------------------------------------------!
178
179	USE advec_ws
180
181	USE arrays_3d
182
183	USE cloud_parameters, &
184	ONLY: nc_const, precipitation_amount, precipitation_rate, prr
185
186	USE constants, &
187	ONLY: pi
188
189	USE control_parameters
190
191	USE grid_variables, &
192	ONLY: dx, dy
193
194	USE indices
195
196	USE lpm_init_mod, &
197	ONLY: lpm_init
198
199	USE kinds
200
201	USE ls_forcing_mod
202
203	USE model_1d, &
204	ONLY: e1d, kh1d, km1d, l1d, rif1d, u1d, us1d, usws1d, v1d, vsws1d
205
206	USE netcdf_control
207
208	USE particle_attributes, &
209	ONLY: particle_advection, use_sgs_for_particles, wang_kernel
210
211	USE pegrid
212
213	USE random_function_mod
214
215	USE random_generator_parallel, &
216	ONLY: random_number_parallel, random_seed_parallel, random_dummy, &
217	id_random_array, seq_random_array
218
219	USE statistics, &
220	ONLY: hom, hom_sum, pr_palm, rmask, spectrum_x, spectrum_y, &
221	statistic_regions, sums, sums_divnew_l, sums_divold_l, sums_l, &
222	sums_l_l, sums_up_fraction_l, sums_wsts_bc_l, ts_value, &
223	weight_pres, weight_substep
224
225	USE transpose_indices
226
227	IMPLICIT NONE
228
229	INTEGER(iwp) :: i !:
230	INTEGER(iwp) :: ind_array(1) !:
231	INTEGER(iwp) :: j !:
232	INTEGER(iwp) :: k !:
233	INTEGER(iwp) :: sr !:
234
235	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ngp_2dh_l !:
236
237	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l !:
238	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_s_inner_l !:
239
240	REAL(wp), DIMENSION(1:2) :: volume_flow_area_l !:
241	REAL(wp), DIMENSION(1:2) :: volume_flow_initial_l !:
242
243	REAL(wp), DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_l !:
244	REAL(wp), DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_tmp !:
245
246
247	CALL location_message( 'allocating arrays', .FALSE. )
248	!
249	!-- Allocate arrays
250	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
251	ngp_3d(0:statistic_regions), &
252	ngp_3d_inner(0:statistic_regions), &
253	ngp_3d_inner_l(0:statistic_regions), &
254	ngp_3d_inner_tmp(0:statistic_regions), &
255	sums_divnew_l(0:statistic_regions), &
256	sums_divold_l(0:statistic_regions) )
257	ALLOCATE( dp_smooth_factor(nzb:nzt), rdf(nzb+1:nzt), rdf_sc(nzb+1:nzt) )
258	ALLOCATE( ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
259	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
260	ngp_2dh_s_inner(nzb:nzt+1,0:statistic_regions), &
261	ngp_2dh_s_inner_l(nzb:nzt+1,0:statistic_regions), &
262	rmask(nysg:nyng,nxlg:nxrg,0:statistic_regions), &
263	sums(nzb:nzt+1,pr_palm+max_pr_user), &
264	sums_l(nzb:nzt+1,pr_palm+max_pr_user,0:threads_per_task-1), &
265	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
266	sums_up_fraction_l(10,3,0:statistic_regions), &
267	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions), &
268	ts_value(dots_max,0:statistic_regions) )
269	ALLOCATE( ptdf_x(nxlg:nxrg), ptdf_y(nysg:nyng) )
270
271	ALLOCATE( rif(nysg:nyng,nxlg:nxrg), shf(nysg:nyng,nxlg:nxrg), &
272	ts(nysg:nyng,nxlg:nxrg), tswst(nysg:nyng,nxlg:nxrg), &
273	us(nysg:nyng,nxlg:nxrg), usws(nysg:nyng,nxlg:nxrg), &
274	uswst(nysg:nyng,nxlg:nxrg), vsws(nysg:nyng,nxlg:nxrg), &
275	vswst(nysg:nyng,nxlg:nxrg), z0(nysg:nyng,nxlg:nxrg), &
276	z0h(nysg:nyng,nxlg:nxrg) )
277
278	ALLOCATE( d(nzb+1:nzt,nys:nyn,nxl:nxr), &
279	kh(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
280	km(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
281	p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
282	tend(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
283
284	#if defined( __nopointer )
285	ALLOCATE( e(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
286	e_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
287	pt(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
288	pt_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
289	u(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
290	u_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
291	v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
292	v_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
293	w(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
294	w_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
295	te_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
296	tpt_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
297	tu_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
298	tv_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
299	tw_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
300	#else
301	ALLOCATE( e_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
302	e_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
303	e_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
304	pt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
305	pt_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
306	u_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
307	u_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
308	u_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
309	v_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
310	v_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
311	v_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
312	w_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
313	w_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
314	w_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
315	IF ( .NOT. neutral ) THEN
316	ALLOCATE( pt_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
317	ENDIF
318	#endif
319
320	!
321	!-- Following array is required for perturbation pressure within the iterative
322	!-- pressure solvers. For the multistep schemes (Runge-Kutta), array p holds
323	!-- the weighted average of the substeps and cannot be used in the Poisson
324	!-- solver.
325	IF ( psolver == 'sor' ) THEN
326	ALLOCATE( p_loc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
327	ELSEIF ( psolver == 'multigrid' ) THEN
328	!
329	!-- For performance reasons, multigrid is using one ghost layer only
330	ALLOCATE( p_loc(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
331	ENDIF
332
333	!
334	!-- Array for storing constant coeffficients of the tridiagonal solver
335	IF ( psolver == 'poisfft' ) THEN
336	ALLOCATE( tri(nxl_z:nxr_z,nys_z:nyn_z,0:nz-1,2) )
337	ALLOCATE( tric(nxl_z:nxr_z,nys_z:nyn_z,0:nz-1) )
338	ENDIF
339
340	IF ( humidity .OR. passive_scalar ) THEN
341	!
342	!-- 2D-humidity/scalar arrays
343	ALLOCATE ( qs(nysg:nyng,nxlg:nxrg), &
344	qsws(nysg:nyng,nxlg:nxrg), &
345	qswst(nysg:nyng,nxlg:nxrg) )
346
347	!
348	!-- 3D-humidity/scalar arrays
349	#if defined( __nopointer )
350	ALLOCATE( q(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
351	q_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
352	tq_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
353	#else
354	ALLOCATE( q_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
355	q_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
356	q_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
357	#endif
358
359	!
360	!-- 3D-arrays needed for humidity only
361	IF ( humidity ) THEN
362	#if defined( __nopointer )
363	ALLOCATE( vpt(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
364	#else
365	ALLOCATE( vpt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
366	#endif
367
368	IF ( cloud_physics ) THEN
369
370	!
371	!-- Liquid water content
372	#if defined( __nopointer )
373	ALLOCATE ( ql(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
374	#else
375	ALLOCATE ( ql_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
376	#endif
377	!
378	!-- Precipitation amount and rate (only needed if output is switched)
379	ALLOCATE( precipitation_amount(nysg:nyng,nxlg:nxrg), &
380	precipitation_rate(nysg:nyng,nxlg:nxrg) )
381
382	IF ( icloud_scheme == 0 ) THEN
383	!
384	!-- 1D-arrays
385	ALLOCATE ( nc_1d(nzb:nzt+1), pt_1d(nzb:nzt+1), &
386	q_1d(nzb:nzt+1), qc_1d(nzb:nzt+1) )
387	!
388	!-- 3D-cloud water content
389	#if defined( __nopointer )
390	ALLOCATE( qc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
391	#else
392	ALLOCATE( qc_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
393	#endif
394
395	IF ( precipitation ) THEN
396	!
397	!-- 1D-arrays
398	ALLOCATE ( nr_1d(nzb:nzt+1), qr_1d(nzb:nzt+1) )
399
400	!
401	!-- 2D-rain water content and rain drop concentration arrays
402	ALLOCATE ( qrs(nysg:nyng,nxlg:nxrg), &
403	qrsws(nysg:nyng,nxlg:nxrg), &
404	qrswst(nysg:nyng,nxlg:nxrg), &
405	nrs(nysg:nyng,nxlg:nxrg), &
406	nrsws(nysg:nyng,nxlg:nxrg), &
407	nrswst(nysg:nyng,nxlg:nxrg) )
408	!
409	!-- 3D-rain water content, rain drop concentration arrays
410	#if defined( __nopointer )
411	ALLOCATE( nr(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
412	nr_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
413	qr(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
414	qr_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
415	tnr_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
416	tqr_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
417	#else
418	ALLOCATE( nr_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
419	nr_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
420	nr_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
421	qr_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
422	qr_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
423	qr_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
424	#endif
425	!
426	!-- 3d-precipitation rate
427	ALLOCATE( prr(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
428	ENDIF
429
430	ENDIF
431	ENDIF
432
433	IF ( cloud_droplets ) THEN
434	!
435	!-- Liquid water content, change in liquid water content
436	#if defined( __nopointer )
437	ALLOCATE ( ql(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
438	ql_c(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
439	#else
440	ALLOCATE ( ql_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
441	ql_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
442	#endif
443	!
444	!-- Real volume of particles (with weighting), volume of particles
445	ALLOCATE ( ql_v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
446	ql_vp(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
447	ENDIF
448
449	ENDIF
450
451	ENDIF
452
453	IF ( ocean ) THEN
454	ALLOCATE( saswsb(nysg:nyng,nxlg:nxrg), &
455	saswst(nysg:nyng,nxlg:nxrg) )
456	#if defined( __nopointer )
457	ALLOCATE( prho(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
458	rho(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
459	sa(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
460	sa_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
461	tsa_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
462	#else
463	ALLOCATE( prho_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
464	rho_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
465	sa_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
466	sa_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
467	sa_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
468	prho => prho_1
469	rho => rho_1 ! routines calc_mean_profile and diffusion_e require
470	! density to be apointer
471	#endif
472	IF ( humidity_remote ) THEN
473	ALLOCATE( qswst_remote(nysg:nyng,nxlg:nxrg))
474	qswst_remote = 0.0_wp
475	ENDIF
476	ENDIF
477
478	!
479	!-- 3D-array for storing the dissipation, needed for calculating the sgs
480	!-- particle velocities
481	IF ( use_sgs_for_particles .OR. wang_kernel .OR. turbulence .OR. &
482	num_acc_per_node > 0 ) THEN
483	ALLOCATE( diss(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
484	ENDIF
485
486	IF ( dt_dosp /= 9999999.9_wp ) THEN
487	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
488	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
489	spectrum_x = 0.0_wp
490	spectrum_y = 0.0_wp
491	ENDIF
492
493	!
494	!-- 1D-array for large scale subsidence velocity
495	IF ( .NOT. ALLOCATED( w_subs ) ) THEN
496	ALLOCATE ( w_subs(nzb:nzt+1) )
497	w_subs = 0.0_wp
498	ENDIF
499
500	!
501	!-- ID-array and state-space-array for the parallel random number generator
502	IF ( random_generator == 'random-parallel' ) THEN
503	ALLOCATE ( seq_random_array(5,nysg:nyng,nxlg:nxrg) )
504	ALLOCATE ( id_random_array(0:ny,0:nx) )
505	seq_random_array = 0
506	id_random_array = 0
507	ENDIF
508
509	!
510	!-- 3D-arrays for the leaf area density and the canopy drag coefficient
511	IF ( plant_canopy ) THEN
512	ALLOCATE ( lad_s(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
513	lad_u(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
514	lad_v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
515	lad_w(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
516	cdc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
517
518	IF ( passive_scalar ) THEN
519	ALLOCATE ( sls(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
520	sec(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
521	ENDIF
522
523	IF ( cthf /= 0.0_wp ) THEN
524	ALLOCATE ( lai(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
525	canopy_heat_flux(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
526	ENDIF
527
528	ENDIF
529
530	!
531	!-- 4D-array for storing the Rif-values at vertical walls
532	IF ( topography /= 'flat' ) THEN
533	ALLOCATE( rif_wall(nzb:nzt+1,nysg:nyng,nxlg:nxrg,1:4) )
534	rif_wall = 0.0_wp
535	ENDIF
536
537	!
538	!-- Arrays to store velocity data from t-dt and the phase speeds which
539	!-- are needed for radiation boundary conditions
540	IF ( outflow_l ) THEN
541	ALLOCATE( u_m_l(nzb:nzt+1,nysg:nyng,1:2), &
542	v_m_l(nzb:nzt+1,nysg:nyng,0:1), &
543	w_m_l(nzb:nzt+1,nysg:nyng,0:1) )
544	ENDIF
545	IF ( outflow_r ) THEN
546	ALLOCATE( u_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx), &
547	v_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx), &
548	w_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx) )
549	ENDIF
550	IF ( outflow_l .OR. outflow_r ) THEN
551	ALLOCATE( c_u(nzb:nzt+1,nysg:nyng), c_v(nzb:nzt+1,nysg:nyng), &
552	c_w(nzb:nzt+1,nysg:nyng) )
553	ENDIF
554	IF ( outflow_s ) THEN
555	ALLOCATE( u_m_s(nzb:nzt+1,0:1,nxlg:nxrg), &
556	v_m_s(nzb:nzt+1,1:2,nxlg:nxrg), &
557	w_m_s(nzb:nzt+1,0:1,nxlg:nxrg) )
558	ENDIF
559	IF ( outflow_n ) THEN
560	ALLOCATE( u_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg), &
561	v_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg), &
562	w_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg) )
563	ENDIF
564	IF ( outflow_s .OR. outflow_n ) THEN
565	ALLOCATE( c_u(nzb:nzt+1,nxlg:nxrg), c_v(nzb:nzt+1,nxlg:nxrg), &
566	c_w(nzb:nzt+1,nxlg:nxrg) )
567	ENDIF
568	IF ( outflow_l .OR. outflow_r .OR. outflow_s .OR. outflow_n ) THEN
569	ALLOCATE( c_u_m_l(nzb:nzt+1), c_v_m_l(nzb:nzt+1), c_w_m_l(nzb:nzt+1) )
570	ALLOCATE( c_u_m(nzb:nzt+1), c_v_m(nzb:nzt+1), c_w_m(nzb:nzt+1) )
571	ENDIF
572
573
574	#if ! defined( __nopointer )
575	!
576	!-- Initial assignment of the pointers
577	e => e_1; e_p => e_2; te_m => e_3
578	IF ( .NOT. neutral ) THEN
579	pt => pt_1; pt_p => pt_2; tpt_m => pt_3
580	ELSE
581	pt => pt_1; pt_p => pt_1; tpt_m => pt_3
582	ENDIF
583	u => u_1; u_p => u_2; tu_m => u_3
584	v => v_1; v_p => v_2; tv_m => v_3
585	w => w_1; w_p => w_2; tw_m => w_3
586
587	IF ( humidity .OR. passive_scalar ) THEN
588	q => q_1; q_p => q_2; tq_m => q_3
589	IF ( humidity ) THEN
590	vpt => vpt_1
591	IF ( cloud_physics ) THEN
592	ql => ql_1
593	IF ( icloud_scheme == 0 ) THEN
594	qc => qc_1
595	IF ( precipitation ) THEN
596	qr => qr_1; qr_p => qr_2; tqr_m => qr_3
597	nr => nr_1; nr_p => nr_2; tnr_m => nr_3
598	ENDIF
599	ENDIF
600	ENDIF
601	ENDIF
602	IF ( cloud_droplets ) THEN
603	ql => ql_1
604	ql_c => ql_2
605	ENDIF
606	ENDIF
607
608	IF ( ocean ) THEN
609	sa => sa_1; sa_p => sa_2; tsa_m => sa_3
610	ENDIF
611	#endif
612
613	!
614	!-- Allocate arrays containing the RK coefficient for calculation of
615	!-- perturbation pressure and turbulent fluxes. At this point values are
616	!-- set for pressure calculation during initialization (where no timestep
617	!-- is done). Further below the values needed within the timestep scheme
618	!-- will be set.
619	ALLOCATE( weight_substep(1:intermediate_timestep_count_max), &
620	weight_pres(1:intermediate_timestep_count_max) )
621	weight_substep = 1.0_wp
622	weight_pres = 1.0_wp
623	intermediate_timestep_count = 1 ! needed when simulated_time = 0.0
624
625	CALL location_message( 'finished', .TRUE. )
626	!
627	!-- Initialize model variables
628	IF ( TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
629	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
630	!
631	!-- First model run of a possible job queue.
632	!-- Initial profiles of the variables must be computes.
633	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
634
635	CALL location_message( 'initializing with 1D model profiles', .FALSE. )
636	!
637	!-- Use solutions of the 1D model as initial profiles,
638	!-- start 1D model
639	CALL init_1d_model
640	!
641	!-- Transfer initial profiles to the arrays of the 3D model
642	DO i = nxlg, nxrg
643	DO j = nysg, nyng
644	e(:,j,i) = e1d
645	kh(:,j,i) = kh1d
646	km(:,j,i) = km1d
647	pt(:,j,i) = pt_init
648	u(:,j,i) = u1d
649	v(:,j,i) = v1d
650	ENDDO
651	ENDDO
652
653	IF ( humidity .OR. passive_scalar ) THEN
654	DO i = nxlg, nxrg
655	DO j = nysg, nyng
656	q(:,j,i) = q_init
657	ENDDO
658	ENDDO
659	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
660	precipitation ) THEN
661	DO i = nxlg, nxrg
662	DO j = nysg, nyng
663	qr(:,j,i) = 0.0_wp
664	nr(:,j,i) = 0.0_wp
665	ENDDO
666	ENDDO
667	!
668	!-- Initialze nc_1d with default value
669	nc_1d(:) = nc_const
670
671	ENDIF
672	ENDIF
673
674	IF ( .NOT. constant_diffusion ) THEN
675	DO i = nxlg, nxrg
676	DO j = nysg, nyng
677	e(:,j,i) = e1d
678	ENDDO
679	ENDDO
680	!
681	!-- Store initial profiles for output purposes etc.
682	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
683
684	IF ( prandtl_layer ) THEN
685	rif = rif1d(nzb+1)
686	ts = 0.0_wp ! could actually be computed more accurately in the
687	! 1D model. Update when opportunity arises.
688	us = us1d
689	usws = usws1d
690	vsws = vsws1d
691	ELSE
692	ts = 0.0_wp ! must be set, because used in
693	rif = 0.0_wp ! flowste
694	us = 0.0_wp
695	usws = 0.0_wp
696	vsws = 0.0_wp
697	ENDIF
698
699	ELSE
700	e = 0.0_wp ! must be set, because used in
701	rif = 0.0_wp ! flowste
702	ts = 0.0_wp
703	us = 0.0_wp
704	usws = 0.0_wp
705	vsws = 0.0_wp
706	ENDIF
707	uswst = top_momentumflux_u
708	vswst = top_momentumflux_v
709
710	!
711	!-- In every case qs = 0.0 (see also pt)
712	!-- This could actually be computed more accurately in the 1D model.
713	!-- Update when opportunity arises!
714	IF ( humidity .OR. passive_scalar ) THEN
715	qs = 0.0_wp
716	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
717	precipitation ) THEN
718	qrs = 0.0_wp
719	nrs = 0.0_wp
720	ENDIF
721	ENDIF
722
723	!
724	!-- inside buildings set velocities back to zero
725	IF ( topography /= 'flat' ) THEN
726	DO i = nxl-1, nxr+1
727	DO j = nys-1, nyn+1
728	u(nzb:nzb_u_inner(j,i),j,i) = 0.0_wp
729	v(nzb:nzb_v_inner(j,i),j,i) = 0.0_wp
730	ENDDO
731	ENDDO
732
733	!
734	!-- WARNING: The extra boundary conditions set after running the
735	!-- ------- 1D model impose an error on the divergence one layer
736	!-- below the topography; need to correct later
737	!-- ATTENTION: Provisional correction for Piacsek & Williams
738	!-- --------- advection scheme: keep u and v zero one layer below
739	!-- the topography.
740	IF ( ibc_uv_b == 1 ) THEN
741	!
742	!-- Neumann condition
743	DO i = nxl-1, nxr+1
744	DO j = nys-1, nyn+1
745	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
746	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
747	ENDDO
748	ENDDO
749
750	ENDIF
751
752	ENDIF
753
754	CALL location_message( 'finished', .TRUE. )
755
756	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
757	THEN
758
759	CALL location_message( 'initializing with constant profiles', .FALSE. )
760	!
761	!-- Overwrite initial profiles in case of nudging
762	IF ( nudging ) THEN
763	pt_init = ptnudge(:,1)
764	u_init = unudge(:,1)
765	v_init = vnudge(:,1)
766	IF ( humidity .OR. passive_scalar ) THEN
767	q_init = qnudge(:,1)
768	ENDIF
769
770	WRITE( message_string, * ) 'Initial profiles of u, v and ', &
771	'scalars from NUDGING_DATA are used.'
772	CALL message( 'init_3d_model', 'PA0370', 0, 0, 0, 6, 0 )
773	ENDIF
774
775	!
776	!-- Use constructed initial profiles (velocity constant with height,
777	!-- temperature profile with constant gradient)
778	DO i = nxlg, nxrg
779	DO j = nysg, nyng
780	pt(:,j,i) = pt_init
781	u(:,j,i) = u_init
782	v(:,j,i) = v_init
783	ENDDO
784	ENDDO
785
786	!
787	!-- Set initial horizontal velocities at the lowest computational grid
788	!-- levels to zero in order to avoid too small time steps caused by the
789	!-- diffusion limit in the initial phase of a run (at k=1, dz/2 occurs
790	!-- in the limiting formula!). The original values are stored to be later
791	!-- used for volume flow control.
792	IF ( ibc_uv_b /= 1 .AND. ( .NOT. bc_lr_dirrad .AND. &
793	.NOT. bc_lr_raddir .AND. &
794	.NOT. bc_ns_dirrad .AND. &
795	.NOT. bc_ns_raddir ) ) THEN
796	DO i = nxlg, nxrg
797	DO j = nysg, nyng
798	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0_wp
799	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0_wp
800	ENDDO
801	ENDDO
802	ENDIF
803
804	IF ( humidity .OR. passive_scalar ) THEN
805	DO i = nxlg, nxrg
806	DO j = nysg, nyng
807	q(:,j,i) = q_init
808	ENDDO
809	ENDDO
810	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
811	!
812	!-- Initialze nc_1d with default value
813	nc_1d(:) = nc_const
814
815	IF ( precipitation ) THEN
816	DO i = nxlg, nxrg
817	DO j = nysg, nyng
818	qr(:,j,i) = 0.0_wp
819	nr(:,j,i) = 0.0_wp
820	ENDDO
821	ENDDO
822	ENDIF
823
824	ENDIF
825	ENDIF
826
827	IF ( ocean ) THEN
828	DO i = nxlg, nxrg
829	DO j = nysg, nyng
830	sa(:,j,i) = sa_init
831	ENDDO
832	ENDDO
833	ENDIF
834
835	IF ( constant_diffusion ) THEN
836	km = km_constant
837	kh = km / prandtl_number
838	e = 0.0_wp
839	ELSEIF ( e_init > 0.0_wp ) THEN
840	DO k = nzb+1, nzt
841	km(k,:,:) = 0.1_wp * l_grid(k) * SQRT( e_init )
842	ENDDO
843	km(nzb,:,:) = km(nzb+1,:,:)
844	km(nzt+1,:,:) = km(nzt,:,:)
845	kh = km / prandtl_number
846	e = e_init
847	ELSE
848	IF ( .NOT. ocean ) THEN
849	kh = 0.01_wp ! there must exist an initial diffusion, because
850	km = 0.01_wp ! otherwise no TKE would be produced by the
851	! production terms, as long as not yet
852	! e = (u/cm)*2 at k=nzb+1
853	ELSE
854	kh = 0.00001_wp
855	km = 0.00001_wp
856	ENDIF
857	e = 0.0_wp
858	ENDIF
859	rif = 0.0_wp
860	ts = 0.0_wp
861	us = 0.0_wp
862	usws = 0.0_wp
863	uswst = top_momentumflux_u
864	vsws = 0.0_wp
865	vswst = top_momentumflux_v
866	IF ( humidity .OR. passive_scalar ) qs = 0.0_wp
867
868	!
869	!-- Compute initial temperature field and other constants used in case
870	!-- of a sloping surface
871	IF ( sloping_surface ) CALL init_slope
872
873	CALL location_message( 'finished', .TRUE. )
874
875	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
876	THEN
877
878	CALL location_message( 'initializing by user', .FALSE. )
879	!
880	!-- Initialization will completely be done by the user
881	CALL user_init_3d_model
882
883	CALL location_message( 'finished', .TRUE. )
884
885	ENDIF
886
887	CALL location_message( 'initializing statistics, boundary conditions, etc.', &
888	.FALSE. )
889
890	!
891	!-- Bottom boundary
892	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2 ) THEN
893	u(nzb,:,:) = 0.0_wp
894	v(nzb,:,:) = 0.0_wp
895	ENDIF
896
897	!
898	!-- Apply channel flow boundary condition
899	IF ( TRIM( bc_uv_t ) == 'dirichlet_0' ) THEN
900	u(nzt+1,:,:) = 0.0_wp
901	v(nzt+1,:,:) = 0.0_wp
902	ENDIF
903
904	!
905	!-- Calculate virtual potential temperature
906	IF ( humidity ) vpt = pt * ( 1.0_wp + 0.61_wp * q )
907
908	!
909	!-- Store initial profiles for output purposes etc.
910	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
911	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
912	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2) THEN
913	hom(nzb,1,5,:) = 0.0_wp
914	hom(nzb,1,6,:) = 0.0_wp
915	ENDIF
916	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
917	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
918	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
919
920	IF ( ocean ) THEN
921	!
922	!-- Store initial salinity profile
923	hom(:,1,26,:) = SPREAD( sa(:,nys,nxl), 2, statistic_regions+1 )
924	ENDIF
925
926	IF ( humidity ) THEN
927	!
928	!-- Store initial profile of total water content, virtual potential
929	!-- temperature
930	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
931	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
932	IF ( cloud_physics .OR. cloud_droplets ) THEN
933	!
934	!-- Store initial profile of specific humidity and potential
935	!-- temperature
936	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
937	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
938	ENDIF
939	ENDIF
940
941	IF ( passive_scalar ) THEN
942	!
943	!-- Store initial scalar profile
944	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
945	ENDIF
946
947	!
948	!-- Initialize the random number generators (from numerical recipes)
949	CALL random_function_ini
950	IF ( random_generator == 'random-parallel' ) THEN
951	CALL random_function_ini
952	!- asigning an ID to every vertical gridpoint column
953	DO j=0,ny
954	DO i=0,nx
955	id_random_array(j,i) = 1000000*i + j
956	END DO
957	ENDDO
958	!- executing the initial ran_parallel
959	DO j = nysg, nyng
960	DO i = nxlg, nxrg
961	CALL random_seed_parallel (random_sequence=id_random_array(j, i))
962	CALL random_number_parallel (random_dummy)
963	CALL random_seed_parallel (get=seq_random_array(:, j, i))
964	END DO
965	ENDDO
966	ENDIF
967
968	!
969	!-- Initialize fluxes at bottom surface
970	IF ( use_surface_fluxes ) THEN
971
972	IF ( constant_heatflux ) THEN
973	!
974	!-- Heat flux is prescribed
975	IF ( random_heatflux ) THEN
976	CALL disturb_heatflux
977	ELSE
978	shf = surface_heatflux
979	!
980	!-- Initialize shf with data from external file LSF_DATA
981	IF ( large_scale_forcing .AND. lsf_surf ) THEN
982	CALL ls_forcing_surf ( simulated_time )
983	ENDIF
984
985	!
986	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
987	IF ( TRIM( topography ) /= 'flat' ) THEN
988	DO i = nxlg, nxrg
989	DO j = nysg, nyng
990	IF ( nzb_s_inner(j,i) /= 0 ) THEN
991	shf(j,i) = wall_heatflux(0)
992	ENDIF
993	ENDDO
994	ENDDO
995	ENDIF
996	ENDIF
997	ENDIF
998
999	!
1000	!-- Determine the near-surface water flux
1001	IF ( humidity .OR. passive_scalar ) THEN
1002	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1003	precipitation ) THEN
1004	qrsws = 0.0_wp
1005	nrsws = 0.0_wp
1006	ENDIF
1007	IF ( constant_waterflux ) THEN
1008	qsws = surface_waterflux
1009	!
1010	!-- Over topography surface_waterflux is replaced by
1011	!-- wall_humidityflux(0)
1012	IF ( TRIM( topography ) /= 'flat' ) THEN
1013	wall_qflux = wall_humidityflux
1014	DO i = nxlg, nxrg
1015	DO j = nysg, nyng
1016	IF ( nzb_s_inner(j,i) /= 0 ) THEN
1017	qsws(j,i) = wall_qflux(0)
1018	ENDIF
1019	ENDDO
1020	ENDDO
1021	ENDIF
1022	ENDIF
1023	ENDIF
1024
1025	ENDIF
1026
1027	!
1028	!-- Initialize fluxes at top surface
1029	!-- Currently, only the heatflux and salinity flux can be prescribed.
1030	!-- The latent flux is zero in this case!
1031	IF ( use_top_fluxes ) THEN
1032
1033	IF ( constant_top_heatflux ) THEN
1034	!
1035	!-- Heat flux is prescribed
1036	tswst = top_heatflux
1037
1038	IF ( humidity .OR. passive_scalar ) THEN
1039	qswst = 0.0_wp
1040	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1041	precipitation ) THEN
1042	nrswst = 0.0_wp
1043	qrswst = 0.0_wp
1044	ENDIF
1045	ENDIF
1046
1047	IF ( ocean ) THEN
1048	saswsb = bottom_salinityflux
1049	saswst = top_salinityflux
1050	ENDIF
1051	ENDIF
1052
1053	!
1054	!-- Initialization in case of a coupled model run
1055	IF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
1056	tswst = 0.0_wp
1057	ENDIF
1058
1059	ENDIF
1060
1061	!
1062	!-- Initialize Prandtl layer quantities
1063	IF ( prandtl_layer ) THEN
1064
1065	z0 = roughness_length
1066	z0h = z0h_factor * z0
1067
1068	IF ( .NOT. constant_heatflux ) THEN
1069	!
1070	!-- Surface temperature is prescribed. Here the heat flux cannot be
1071	!-- simply estimated, because therefore rif, u* and theta* would have
1072	!-- to be computed by iteration. This is why the heat flux is assumed
1073	!-- to be zero before the first time step. It approaches its correct
1074	!-- value in the course of the first few time steps.
1075	shf = 0.0_wp
1076	ENDIF
1077
1078	IF ( humidity .OR. passive_scalar ) THEN
1079	IF ( .NOT. constant_waterflux ) qsws = 0.0_wp
1080	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1081	precipitation ) THEN
1082	qrsws = 0.0_wp
1083	nrsws = 0.0_wp
1084	ENDIF
1085	ENDIF
1086
1087	ENDIF
1088
1089	!
1090	!-- Set the reference state to be used in the buoyancy terms (for ocean runs
1091	!-- the reference state will be set (overwritten) in init_ocean)
1092	IF ( use_single_reference_value ) THEN
1093	IF ( .NOT. humidity ) THEN
1094	ref_state(:) = pt_reference
1095	ELSE
1096	ref_state(:) = vpt_reference
1097	ENDIF
1098	ELSE
1099	IF ( .NOT. humidity ) THEN
1100	ref_state(:) = pt_init(:)
1101	ELSE
1102	ref_state(:) = vpt(:,nys,nxl)
1103	ENDIF
1104	ENDIF
1105
1106	!
1107	!-- For the moment, vertical velocity is zero
1108	w = 0.0_wp
1109
1110	!
1111	!-- Initialize array sums (must be defined in first call of pres)
1112	sums = 0.0_wp
1113
1114	!
1115	!-- In case of iterative solvers, p must get an initial value
1116	IF ( psolver == 'multigrid' .OR. psolver == 'sor' ) p = 0.0_wp
1117
1118	!
1119	!-- Treating cloud physics, liquid water content and precipitation amount
1120	!-- are zero at beginning of the simulation
1121	IF ( cloud_physics ) THEN
1122	ql = 0.0_wp
1123	IF ( precipitation ) precipitation_amount = 0.0_wp
1124	IF ( icloud_scheme == 0 ) THEN
1125	qc = 0.0_wp
1126	nc_1d = nc_const
1127	ENDIF
1128	ENDIF
1129	!
1130	!-- Impose vortex with vertical axis on the initial velocity profile
1131	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
1132	CALL init_rankine
1133	ENDIF
1134
1135	!
1136	!-- Impose temperature anomaly (advection test only)
1137	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
1138	CALL init_pt_anomaly
1139	ENDIF
1140
1141	!
1142	!-- If required, change the surface temperature at the start of the 3D run
1143	IF ( pt_surface_initial_change /= 0.0_wp ) THEN
1144	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
1145	ENDIF
1146
1147	!
1148	!-- If required, change the surface humidity/scalar at the start of the 3D
1149	!-- run
1150	IF ( ( humidity .OR. passive_scalar ) .AND. &
1151	q_surface_initial_change /= 0.0_wp ) THEN
1152	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
1153	ENDIF
1154
1155	!
1156	!-- Initialize old and new time levels.
1157	te_m = 0.0_wp; tpt_m = 0.0_wp; tu_m = 0.0_wp; tv_m = 0.0_wp; tw_m = 0.0_wp
1158	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
1159
1160	IF ( humidity .OR. passive_scalar ) THEN
1161	tq_m = 0.0_wp
1162	q_p = q
1163	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1164	precipitation ) THEN
1165	tqr_m = 0.0_wp
1166	qr_p = qr
1167	tnr_m = 0.0_wp
1168	nr_p = nr
1169	ENDIF
1170	ENDIF
1171
1172	IF ( ocean ) THEN
1173	tsa_m = 0.0_wp
1174	sa_p = sa
1175	ENDIF
1176
1177	CALL location_message( 'finished', .TRUE. )
1178
1179	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' .OR. &
1180	TRIM( initializing_actions ) == 'cyclic_fill' ) &
1181	THEN
1182
1183	CALL location_message( 'initializing in case of restart / cyclic_fill', &
1184	.FALSE. )
1185	!
1186	!-- When reading data for cyclic fill of 3D prerun data files, read
1187	!-- some of the global variables from the restart file which are required
1188	!-- for initializing the inflow
1189	IF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1190
1191	DO i = 0, io_blocks-1
1192	IF ( i == io_group ) THEN
1193	CALL read_parts_of_var_list
1194	CALL close_file( 13 )
1195	ENDIF
1196	#if defined( __parallel )
1197	CALL MPI_BARRIER( comm2d, ierr )
1198	#endif
1199	ENDDO
1200
1201	ENDIF
1202
1203	!
1204	!-- Read binary data from restart file
1205	DO i = 0, io_blocks-1
1206	IF ( i == io_group ) THEN
1207	CALL read_3d_binary
1208	ENDIF
1209	#if defined( __parallel )
1210	CALL MPI_BARRIER( comm2d, ierr )
1211	#endif
1212	ENDDO
1213
1214	!
1215	!-- Initialization of the turbulence recycling method
1216	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. &
1217	turbulent_inflow ) THEN
1218	!
1219	!-- First store the profiles to be used at the inflow.
1220	!-- These profiles are the (temporally) and horizontally averaged vertical
1221	!-- profiles from the prerun. Alternatively, prescribed profiles
1222	!-- for u,v-components can be used.
1223	ALLOCATE( mean_inflow_profiles(nzb:nzt+1,5) )
1224
1225	IF ( use_prescribed_profile_data ) THEN
1226	mean_inflow_profiles(:,1) = u_init ! u
1227	mean_inflow_profiles(:,2) = v_init ! v
1228	ELSE
1229	mean_inflow_profiles(:,1) = hom_sum(:,1,0) ! u
1230	mean_inflow_profiles(:,2) = hom_sum(:,2,0) ! v
1231	ENDIF
1232	mean_inflow_profiles(:,4) = hom_sum(:,4,0) ! pt
1233	mean_inflow_profiles(:,5) = hom_sum(:,8,0) ! e
1234
1235	!
1236	!-- If necessary, adjust the horizontal flow field to the prescribed
1237	!-- profiles
1238	IF ( use_prescribed_profile_data ) THEN
1239	DO i = nxlg, nxrg
1240	DO j = nysg, nyng
1241	DO k = nzb, nzt+1
1242	u(k,j,i) = u(k,j,i) - hom_sum(k,1,0) + u_init(k)
1243	v(k,j,i) = v(k,j,i) - hom_sum(k,2,0) + v_init(k)
1244	ENDDO
1245	ENDDO
1246	ENDDO
1247	ENDIF
1248
1249	!
1250	!-- Use these mean profiles at the inflow (provided that Dirichlet
1251	!-- conditions are used)
1252	IF ( inflow_l ) THEN
1253	DO j = nysg, nyng
1254	DO k = nzb, nzt+1
1255	u(k,j,nxlg:-1) = mean_inflow_profiles(k,1)
1256	v(k,j,nxlg:-1) = mean_inflow_profiles(k,2)
1257	w(k,j,nxlg:-1) = 0.0_wp
1258	pt(k,j,nxlg:-1) = mean_inflow_profiles(k,4)
1259	e(k,j,nxlg:-1) = mean_inflow_profiles(k,5)
1260	ENDDO
1261	ENDDO
1262	ENDIF
1263
1264	!
1265	!-- Calculate the damping factors to be used at the inflow. For a
1266	!-- turbulent inflow the turbulent fluctuations have to be limited
1267	!-- vertically because otherwise the turbulent inflow layer will grow
1268	!-- in time.
1269	IF ( inflow_damping_height == 9999999.9_wp ) THEN
1270	!
1271	!-- Default: use the inversion height calculated by the prerun; if
1272	!-- this is zero, inflow_damping_height must be explicitly
1273	!-- specified.
1274	IF ( hom_sum(nzb+6,pr_palm,0) /= 0.0_wp ) THEN
1275	inflow_damping_height = hom_sum(nzb+6,pr_palm,0)
1276	ELSE
1277	WRITE( message_string, * ) 'inflow_damping_height must be ',&
1278	'explicitly specified because&the inversion height ', &
1279	'calculated by the prerun is zero.'
1280	CALL message( 'init_3d_model', 'PA0318', 1, 2, 0, 6, 0 )
1281	ENDIF
1282
1283	ENDIF
1284
1285	IF ( inflow_damping_width == 9999999.9_wp ) THEN
1286	!
1287	!-- Default for the transition range: one tenth of the undamped
1288	!-- layer
1289	inflow_damping_width = 0.1_wp * inflow_damping_height
1290
1291	ENDIF
1292
1293	ALLOCATE( inflow_damping_factor(nzb:nzt+1) )
1294
1295	DO k = nzb, nzt+1
1296
1297	IF ( zu(k) <= inflow_damping_height ) THEN
1298	inflow_damping_factor(k) = 1.0_wp
1299	ELSEIF ( zu(k) <= ( inflow_damping_height + inflow_damping_width ) ) THEN
1300	inflow_damping_factor(k) = 1.0_wp - &
1301	( zu(k) - inflow_damping_height ) / &
1302	inflow_damping_width
1303	ELSE
1304	inflow_damping_factor(k) = 0.0_wp
1305	ENDIF
1306
1307	ENDDO
1308
1309	ENDIF
1310
1311	!
1312	!-- Inside buildings set velocities and TKE back to zero
1313	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. &
1314	topography /= 'flat' ) THEN
1315	!
1316	!-- Inside buildings set velocities and TKE back to zero.
1317	!-- Other scalars (pt, q, s, km, kh, p, sa, ...) are ignored at present,
1318	!-- maybe revise later.
1319	DO i = nxlg, nxrg
1320	DO j = nysg, nyng
1321	u (nzb:nzb_u_inner(j,i),j,i) = 0.0_wp
1322	v (nzb:nzb_v_inner(j,i),j,i) = 0.0_wp
1323	w (nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1324	e (nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1325	tu_m(nzb:nzb_u_inner(j,i),j,i) = 0.0_wp
1326	tv_m(nzb:nzb_v_inner(j,i),j,i) = 0.0_wp
1327	tw_m(nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1328	te_m(nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1329	tpt_m(nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1330	ENDDO
1331	ENDDO
1332
1333	ENDIF
1334
1335	!
1336	!-- Calculate initial temperature field and other constants used in case
1337	!-- of a sloping surface
1338	IF ( sloping_surface ) CALL init_slope
1339
1340	!
1341	!-- Initialize new time levels (only done in order to set boundary values
1342	!-- including ghost points)
1343	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
1344	IF ( humidity .OR. passive_scalar ) THEN
1345	q_p = q
1346	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1347	precipitation ) THEN
1348	qr_p = qr
1349	nr_p = nr
1350	ENDIF
1351	ENDIF
1352	IF ( ocean ) sa_p = sa
1353
1354	!
1355	!-- Allthough tendency arrays are set in prognostic_equations, they have
1356	!-- have to be predefined here because they are used (but multiplied with 0)
1357	!-- there before they are set.
1358	te_m = 0.0_wp; tpt_m = 0.0_wp; tu_m = 0.0_wp; tv_m = 0.0_wp; tw_m = 0.0_wp
1359	IF ( humidity .OR. passive_scalar ) THEN
1360	tq_m = 0.0_wp
1361	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1362	precipitation ) THEN
1363	tqr_m = 0.0_wp
1364	tnr_m = 0.0_wp
1365	ENDIF
1366	ENDIF
1367	IF ( ocean ) tsa_m = 0.0_wp
1368
1369	CALL location_message( 'finished', .TRUE. )
1370
1371	ELSE
1372	!
1373	!-- Actually this part of the programm should not be reached
1374	message_string = 'unknown initializing problem'
1375	CALL message( 'init_3d_model', 'PA0193', 1, 2, 0, 6, 0 )
1376	ENDIF
1377
1378
1379	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1380	!
1381	!-- Initialize old timelevels needed for radiation boundary conditions
1382	IF ( outflow_l ) THEN
1383	u_m_l(:,:,:) = u(:,:,1:2)
1384	v_m_l(:,:,:) = v(:,:,0:1)
1385	w_m_l(:,:,:) = w(:,:,0:1)
1386	ENDIF
1387	IF ( outflow_r ) THEN
1388	u_m_r(:,:,:) = u(:,:,nx-1:nx)
1389	v_m_r(:,:,:) = v(:,:,nx-1:nx)
1390	w_m_r(:,:,:) = w(:,:,nx-1:nx)
1391	ENDIF
1392	IF ( outflow_s ) THEN
1393	u_m_s(:,:,:) = u(:,0:1,:)
1394	v_m_s(:,:,:) = v(:,1:2,:)
1395	w_m_s(:,:,:) = w(:,0:1,:)
1396	ENDIF
1397	IF ( outflow_n ) THEN
1398	u_m_n(:,:,:) = u(:,ny-1:ny,:)
1399	v_m_n(:,:,:) = v(:,ny-1:ny,:)
1400	w_m_n(:,:,:) = w(:,ny-1:ny,:)
1401	ENDIF
1402
1403	ENDIF
1404
1405	!
1406	!-- Calculate the initial volume flow at the right and north boundary
1407	IF ( conserve_volume_flow ) THEN
1408
1409	IF ( use_prescribed_profile_data ) THEN
1410
1411	volume_flow_initial_l = 0.0_wp
1412	volume_flow_area_l = 0.0_wp
1413
1414	IF ( nxr == nx ) THEN
1415	DO j = nys, nyn
1416	DO k = nzb_2d(j,nx)+1, nzt
1417	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1418	u_init(k) * dzw(k)
1419	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1420	ENDDO
1421	ENDDO
1422	ENDIF
1423
1424	IF ( nyn == ny ) THEN
1425	DO i = nxl, nxr
1426	DO k = nzb_2d(ny,i)+1, nzt
1427	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1428	v_init(k) * dzw(k)
1429	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1430	ENDDO
1431	ENDDO
1432	ENDIF
1433
1434	#if defined( __parallel )
1435	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1436	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1437	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1438	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1439
1440	#else
1441	volume_flow_initial = volume_flow_initial_l
1442	volume_flow_area = volume_flow_area_l
1443	#endif
1444
1445	ELSEIF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1446
1447	volume_flow_initial_l = 0.0_wp
1448	volume_flow_area_l = 0.0_wp
1449
1450	IF ( nxr == nx ) THEN
1451	DO j = nys, nyn
1452	DO k = nzb_2d(j,nx)+1, nzt
1453	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1454	hom_sum(k,1,0) * dzw(k)
1455	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1456	ENDDO
1457	ENDDO
1458	ENDIF
1459
1460	IF ( nyn == ny ) THEN
1461	DO i = nxl, nxr
1462	DO k = nzb_2d(ny,i)+1, nzt
1463	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1464	hom_sum(k,2,0) * dzw(k)
1465	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1466	ENDDO
1467	ENDDO
1468	ENDIF
1469
1470	#if defined( __parallel )
1471	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1472	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1473	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1474	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1475
1476	#else
1477	volume_flow_initial = volume_flow_initial_l
1478	volume_flow_area = volume_flow_area_l
1479	#endif
1480
1481	ELSEIF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1482
1483	volume_flow_initial_l = 0.0_wp
1484	volume_flow_area_l = 0.0_wp
1485
1486	IF ( nxr == nx ) THEN
1487	DO j = nys, nyn
1488	DO k = nzb_2d(j,nx)+1, nzt
1489	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1490	u(k,j,nx) * dzw(k)
1491	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1492	ENDDO
1493	ENDDO
1494	ENDIF
1495
1496	IF ( nyn == ny ) THEN
1497	DO i = nxl, nxr
1498	DO k = nzb_2d(ny,i)+1, nzt
1499	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1500	v(k,ny,i) * dzw(k)
1501	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1502	ENDDO
1503	ENDDO
1504	ENDIF
1505
1506	#if defined( __parallel )
1507	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1508	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1509	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1510	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1511
1512	#else
1513	volume_flow_initial = volume_flow_initial_l
1514	volume_flow_area = volume_flow_area_l
1515	#endif
1516
1517	ENDIF
1518
1519	!
1520	!-- In case of 'bulk_velocity' mode, volume_flow_initial is calculated
1521	!-- from u\|v_bulk instead
1522	IF ( TRIM( conserve_volume_flow_mode ) == 'bulk_velocity' ) THEN
1523	volume_flow_initial(1) = u_bulk * volume_flow_area(1)
1524	volume_flow_initial(2) = v_bulk * volume_flow_area(2)
1525	ENDIF
1526
1527	ENDIF
1528
1529	!
1530	!-- Initialize quantities for special advections schemes
1531	CALL init_advec
1532
1533	!
1534	!-- Impose random perturbation on the horizontal velocity field and then
1535	!-- remove the divergences from the velocity field at the initial stage
1536	IF ( create_disturbances .AND. &
1537	TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
1538	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
1539
1540	CALL location_message( 'creating initial disturbances', .FALSE. )
1541	CALL disturb_field( nzb_u_inner, tend, u )
1542	CALL disturb_field( nzb_v_inner, tend, v )
1543	CALL location_message( 'finished', .TRUE. )
1544
1545	CALL location_message( 'calling pressure solver', .FALSE. )
1546	n_sor = nsor_ini
1547	!$acc data copyin( d, ddzu, ddzw, nzb_s_inner, nzb_u_inner ) &
1548	!$acc copyin( nzb_v_inner, nzb_w_inner, p, rflags_s_inner, tend ) &
1549	!$acc copyin( weight_pres, weight_substep ) &
1550	!$acc copy( tri, tric, u, v, w )
1551	CALL pres
1552	!$acc end data
1553	n_sor = nsor
1554	CALL location_message( 'finished', .TRUE. )
1555
1556	ENDIF
1557
1558	!
1559	!-- Initialization of the leaf area density
1560	IF ( plant_canopy ) THEN
1561
1562	SELECT CASE ( TRIM( canopy_mode ) )
1563
1564	CASE( 'block' )
1565
1566	DO i = nxlg, nxrg
1567	DO j = nysg, nyng
1568	lad_s(:,j,i) = lad(:)
1569	cdc(:,j,i) = drag_coefficient
1570	IF ( passive_scalar ) THEN
1571	sls(:,j,i) = leaf_surface_concentration
1572	sec(:,j,i) = scalar_exchange_coefficient
1573	ENDIF
1574	ENDDO
1575	ENDDO
1576
1577	CASE DEFAULT
1578
1579	!
1580	!-- The DEFAULT case is reached either if the parameter
1581	!-- canopy mode contains a wrong character string or if the
1582	!-- user has coded a special case in the user interface.
1583	!-- There, the subroutine user_init_plant_canopy checks
1584	!-- which of these two conditions applies.
1585	CALL user_init_plant_canopy
1586
1587	END SELECT
1588
1589	CALL exchange_horiz( lad_s, nbgp )
1590	CALL exchange_horiz( cdc, nbgp )
1591
1592	IF ( passive_scalar ) THEN
1593	CALL exchange_horiz( sls, nbgp )
1594	CALL exchange_horiz( sec, nbgp )
1595	ENDIF
1596
1597	!
1598	!-- Sharp boundaries of the plant canopy in horizontal directions
1599	!-- In vertical direction the interpolation is retained, as the leaf
1600	!-- area density is initialised by prescribing a vertical profile
1601	!-- consisting of piecewise linear segments. The upper boundary
1602	!-- of the plant canopy is now defined by lad_w(pch_index,:,:) = 0.0.
1603
1604	DO i = nxl, nxr
1605	DO j = nys, nyn
1606	DO k = nzb, nzt+1
1607	IF ( lad_s(k,j,i) > 0.0_wp ) THEN
1608	lad_u(k,j,i) = lad_s(k,j,i)
1609	lad_u(k,j,i+1) = lad_s(k,j,i)
1610	lad_v(k,j,i) = lad_s(k,j,i)
1611	lad_v(k,j+1,i) = lad_s(k,j,i)
1612	ENDIF
1613	ENDDO
1614	DO k = nzb, nzt
1615	lad_w(k,j,i) = 0.5_wp * ( lad_s(k+1,j,i) + lad_s(k,j,i) )
1616	ENDDO
1617	ENDDO
1618	ENDDO
1619
1620	lad_w(pch_index,:,:) = 0.0_wp
1621	lad_w(nzt+1,:,:) = lad_w(nzt,:,:)
1622
1623	CALL exchange_horiz( lad_u, nbgp )
1624	CALL exchange_horiz( lad_v, nbgp )
1625	CALL exchange_horiz( lad_w, nbgp )
1626
1627	!
1628	!-- Initialisation of the canopy heat source distribution
1629	IF ( cthf /= 0.0_wp ) THEN
1630	!
1631	!-- Piecewise evaluation of the leaf area index by
1632	!-- integration of the leaf area density
1633	lai(:,:,:) = 0.0_wp
1634	DO i = nxlg, nxrg
1635	DO j = nysg, nyng
1636	DO k = pch_index-1, 0, -1
1637	lai(k,j,i) = lai(k+1,j,i) + &
1638	( 0.5_wp * ( lad_w(k+1,j,i) + &
1639	lad_s(k+1,j,i) ) * &
1640	( zw(k+1) - zu(k+1) ) ) + &
1641	( 0.5_wp * ( lad_w(k,j,i) + &
1642	lad_s(k+1,j,i) ) * &
1643	( zu(k+1) - zw(k) ) )
1644	ENDDO
1645	ENDDO
1646	ENDDO
1647
1648	!
1649	!-- Evaluation of the upward kinematic vertical heat flux within the
1650	!-- canopy
1651	DO i = nxlg, nxrg
1652	DO j = nysg, nyng
1653	DO k = 0, pch_index
1654	canopy_heat_flux(k,j,i) = cthf * &
1655	exp( -0.6_wp * lai(k,j,i) )
1656	ENDDO
1657	ENDDO
1658	ENDDO
1659
1660	!
1661	!-- The near surface heat flux is derived from the heat flux
1662	!-- distribution within the canopy
1663	shf(:,:) = canopy_heat_flux(0,:,:)
1664
1665	ENDIF
1666
1667	ENDIF
1668
1669	!
1670	!-- If required, initialize dvrp-software
1671	IF ( dt_dvrp /= 9999999.9_wp ) CALL init_dvrp
1672
1673	IF ( ocean ) THEN
1674	!
1675	!-- Initialize quantities needed for the ocean model
1676	CALL init_ocean
1677
1678	ELSE
1679	!
1680	!-- Initialize quantities for handling cloud physics
1681	!-- This routine must be called before lpm_init, because
1682	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
1683	!-- lpm_init) is not defined.
1684	CALL init_cloud_physics
1685	ENDIF
1686
1687	!
1688	!-- If required, initialize particles
1689	IF ( particle_advection ) CALL lpm_init
1690
1691	!
1692	!-- Initialize the ws-scheme.
1693	IF ( ws_scheme_sca .OR. ws_scheme_mom ) CALL ws_init
1694
1695	!
1696	!-- Setting weighting factors for calculation of perturbation pressure
1697	!-- and turbulent quantities from the RK substeps
1698	IF ( TRIM(timestep_scheme) == 'runge-kutta-3' ) THEN ! for RK3-method
1699
1700	weight_substep(1) = 1._wp/6._wp
1701	weight_substep(2) = 3._wp/10._wp
1702	weight_substep(3) = 8._wp/15._wp
1703
1704	weight_pres(1) = 1._wp/3._wp
1705	weight_pres(2) = 5._wp/12._wp
1706	weight_pres(3) = 1._wp/4._wp
1707
1708	ELSEIF ( TRIM(timestep_scheme) == 'runge-kutta-2' ) THEN ! for RK2-method
1709
1710	weight_substep(1) = 1._wp/2._wp
1711	weight_substep(2) = 1._wp/2._wp
1712
1713	weight_pres(1) = 1._wp/2._wp
1714	weight_pres(2) = 1._wp/2._wp
1715
1716	ELSE ! for Euler-method
1717
1718	weight_substep(1) = 1.0_wp
1719	weight_pres(1) = 1.0_wp
1720
1721	ENDIF
1722
1723	!
1724	!-- Initialize Rayleigh damping factors
1725	rdf = 0.0_wp
1726	rdf_sc = 0.0_wp
1727	IF ( rayleigh_damping_factor /= 0.0_wp ) THEN
1728	IF ( .NOT. ocean ) THEN
1729	DO k = nzb+1, nzt
1730	IF ( zu(k) >= rayleigh_damping_height ) THEN
1731	rdf(k) = rayleigh_damping_factor * &
1732	( SIN( pi * 0.5_wp * ( zu(k) - rayleigh_damping_height ) &
1733	/ ( zu(nzt) - rayleigh_damping_height ) )&
1734	)**2
1735	ENDIF
1736	ENDDO
1737	ELSE
1738	DO k = nzt, nzb+1, -1
1739	IF ( zu(k) <= rayleigh_damping_height ) THEN
1740	rdf(k) = rayleigh_damping_factor * &
1741	( SIN( pi * 0.5_wp * ( rayleigh_damping_height - zu(k) ) &
1742	/ ( rayleigh_damping_height - zu(nzb+1)))&
1743	)**2
1744	ENDIF
1745	ENDDO
1746	ENDIF
1747	ENDIF
1748	IF ( scalar_rayleigh_damping ) rdf_sc = rdf
1749
1750	!
1751	!-- Initialize the starting level and the vertical smoothing factor used for
1752	!-- the external pressure gradient
1753	dp_smooth_factor = 1.0_wp
1754	IF ( dp_external ) THEN
1755	!
1756	!-- Set the starting level dp_level_ind_b only if it has not been set before
1757	!-- (e.g. in init_grid).
1758	IF ( dp_level_ind_b == 0 ) THEN
1759	ind_array = MINLOC( ABS( dp_level_b - zu ) )
1760	dp_level_ind_b = ind_array(1) - 1 + nzb
1761	! MINLOC uses lower array bound 1
1762	ENDIF
1763	IF ( dp_smooth ) THEN
1764	dp_smooth_factor(:dp_level_ind_b) = 0.0_wp
1765	DO k = dp_level_ind_b+1, nzt
1766	dp_smooth_factor(k) = 0.5_wp * ( 1.0_wp + SIN( pi * &
1767	( REAL( k - dp_level_ind_b, KIND=wp ) / &
1768	REAL( nzt - dp_level_ind_b, KIND=wp ) - 0.5_wp ) ) )
1769	ENDDO
1770	ENDIF
1771	ENDIF
1772
1773	!
1774	!-- Initialize damping zone for the potential temperature in case of
1775	!-- non-cyclic lateral boundaries. The damping zone has the maximum value
1776	!-- at the inflow boundary and decreases to zero at pt_damping_width.
1777	ptdf_x = 0.0_wp
1778	ptdf_y = 0.0_wp
1779	IF ( bc_lr_dirrad ) THEN
1780	DO i = nxl, nxr
1781	IF ( ( i * dx ) < pt_damping_width ) THEN
1782	ptdf_x(i) = pt_damping_factor * ( SIN( pi * 0.5_wp * &
1783	REAL( pt_damping_width - i * dx, KIND=wp ) / ( &
1784	REAL( pt_damping_width, KIND=wp ) ) ) )**2
1785	ENDIF
1786	ENDDO
1787	ELSEIF ( bc_lr_raddir ) THEN
1788	DO i = nxl, nxr
1789	IF ( ( i * dx ) > ( nx * dx - pt_damping_width ) ) THEN
1790	ptdf_x(i) = pt_damping_factor * &
1791	SIN( pi * 0.5_wp * &
1792	( ( i - nx ) * dx + pt_damping_width ) / &
1793	REAL( pt_damping_width, KIND=wp ) )**2
1794	ENDIF
1795	ENDDO
1796	ELSEIF ( bc_ns_dirrad ) THEN
1797	DO j = nys, nyn
1798	IF ( ( j * dy ) > ( ny * dy - pt_damping_width ) ) THEN
1799	ptdf_y(j) = pt_damping_factor * &
1800	SIN( pi * 0.5_wp * &
1801	( ( j - ny ) * dy + pt_damping_width ) / &
1802	REAL( pt_damping_width, KIND=wp ) )**2
1803	ENDIF
1804	ENDDO
1805	ELSEIF ( bc_ns_raddir ) THEN
1806	DO j = nys, nyn
1807	IF ( ( j * dy ) < pt_damping_width ) THEN
1808	ptdf_y(j) = pt_damping_factor * &
1809	SIN( pi * 0.5_wp * &
1810	( pt_damping_width - j * dy ) / &
1811	REAL( pt_damping_width, KIND=wp ) )**2
1812	ENDIF
1813	ENDDO
1814	ENDIF
1815
1816	!
1817	!-- Initialize local summation arrays for routine flow_statistics.
1818	!-- This is necessary because they may not yet have been initialized when they
1819	!-- are called from flow_statistics (or - depending on the chosen model run -
1820	!-- are never initialized)
1821	sums_divnew_l = 0.0_wp
1822	sums_divold_l = 0.0_wp
1823	sums_l_l = 0.0_wp
1824	sums_up_fraction_l = 0.0_wp
1825	sums_wsts_bc_l = 0.0_wp
1826
1827	!
1828	!-- Pre-set masks for regional statistics. Default is the total model domain.
1829	!-- Ghost points are excluded because counting values at the ghost boundaries
1830	!-- would bias the statistics
1831	rmask = 1.0_wp
1832	rmask(:,nxlg:nxl-1,:) = 0.0_wp; rmask(:,nxr+1:nxrg,:) = 0.0_wp
1833	rmask(nysg:nys-1,:,:) = 0.0_wp; rmask(nyn+1:nyng,:,:) = 0.0_wp
1834
1835	!
1836	!-- User-defined initializing actions. Check afterwards, if maximum number
1837	!-- of allowed timeseries is exceeded
1838	CALL user_init
1839
1840	IF ( dots_num > dots_max ) THEN
1841	WRITE( message_string, * ) 'number of time series quantities exceeds', &
1842	' its maximum of dots_max = ', dots_max, &
1843	' &Please increase dots_max in modules.f90.'
1844	CALL message( 'init_3d_model', 'PA0194', 1, 2, 0, 6, 0 )
1845	ENDIF
1846
1847	!
1848	!-- Input binary data file is not needed anymore. This line must be placed
1849	!-- after call of user_init!
1850	CALL close_file( 13 )
1851
1852	!
1853	!-- Compute total sum of active mask grid points
1854	!-- ngp_2dh: number of grid points of a horizontal cross section through the
1855	!-- total domain
1856	!-- ngp_3d: number of grid points of the total domain
1857	ngp_2dh_outer_l = 0
1858	ngp_2dh_outer = 0
1859	ngp_2dh_s_inner_l = 0
1860	ngp_2dh_s_inner = 0
1861	ngp_2dh_l = 0
1862	ngp_2dh = 0
1863	ngp_3d_inner_l = 0.0_wp
1864	ngp_3d_inner = 0
1865	ngp_3d = 0
1866	ngp_sums = ( nz + 2 ) * ( pr_palm + max_pr_user )
1867
1868	DO sr = 0, statistic_regions
1869	DO i = nxl, nxr
1870	DO j = nys, nyn
1871	IF ( rmask(j,i,sr) == 1.0_wp ) THEN
1872	!
1873	!-- All xy-grid points
1874	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
1875	!
1876	!-- xy-grid points above topography
1877	DO k = nzb_s_outer(j,i), nz + 1
1878	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
1879	ENDDO
1880	DO k = nzb_s_inner(j,i), nz + 1
1881	ngp_2dh_s_inner_l(k,sr) = ngp_2dh_s_inner_l(k,sr) + 1
1882	ENDDO
1883	!
1884	!-- All grid points of the total domain above topography
1885	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
1886	( nz - nzb_s_inner(j,i) + 2 )
1887	ENDIF
1888	ENDDO
1889	ENDDO
1890	ENDDO
1891
1892	sr = statistic_regions + 1
1893	#if defined( __parallel )
1894	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1895	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
1896	comm2d, ierr )
1897	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1898	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
1899	MPI_INTEGER, MPI_SUM, comm2d, ierr )
1900	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1901	CALL MPI_ALLREDUCE( ngp_2dh_s_inner_l(0,0), ngp_2dh_s_inner(0,0), &
1902	(nz+2)*sr, MPI_INTEGER, MPI_SUM, comm2d, ierr )
1903	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1904	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner_tmp(0), sr, MPI_REAL, &
1905	MPI_SUM, comm2d, ierr )
1906	ngp_3d_inner = INT( ngp_3d_inner_tmp, KIND = SELECTED_INT_KIND( 18 ) )
1907	#else
1908	ngp_2dh = ngp_2dh_l
1909	ngp_2dh_outer = ngp_2dh_outer_l
1910	ngp_2dh_s_inner = ngp_2dh_s_inner_l
1911	ngp_3d_inner = INT( ngp_3d_inner_l, KIND = SELECTED_INT_KIND( 18 ) )
1912	#endif
1913
1914	ngp_3d = INT ( ngp_2dh, KIND = SELECTED_INT_KIND( 18 ) ) * &
1915	INT ( (nz + 2 ), KIND = SELECTED_INT_KIND( 18 ) )
1916
1917	!
1918	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
1919	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
1920	!-- the respective subdomain lie below the surface topography
1921	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
1922	ngp_3d_inner = MAX( INT(1, KIND = SELECTED_INT_KIND( 18 )), &
1923	ngp_3d_inner(:) )
1924	ngp_2dh_s_inner = MAX( 1, ngp_2dh_s_inner(:,:) )
1925
1926	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l, ngp_3d_inner_tmp )
1927
1928	CALL location_message( 'leaving init_3d_model', .TRUE. )
1929
1930	END SUBROUTINE init_3d_model

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