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source: palm/trunk/SOURCE/init_3d_model.f90 @ 1443

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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 1432 2014-07-15 14:51:17Z raasch $
27	!
28	! 1431 2014-07-15 14:47:17Z suehring
29	! var_d added, in order to normalize spectra.
30	!
31	! 1429 2014-07-15 12:53:45Z knoop
32	! Ensemble run capability added to parallel random number generator
33	!
34	! 1411 2014-05-16 18:01:51Z suehring
35	! Initial horizontal velocity profiles were not set to zero at the first vertical
36	! grid level in case of non-cyclic lateral boundary conditions.
37	!
38	! 1406 2014-05-16 13:47:01Z raasch
39	! bugfix: setting of initial velocities at k=1 to zero not in case of a
40	! no-slip boundary condition for uv
41	!
42	! 1402 2014-05-09 14:25:13Z raasch
43	! location messages modified
44	!
45	! 1400 2014-05-09 14:03:54Z knoop
46	! Parallel random number generator added
47	!
48	! 1384 2014-05-02 14:31:06Z raasch
49	! location messages added
50	!
51	! 1361 2014-04-16 15:17:48Z hoffmann
52	! tend_* removed
53	! Bugfix: w_subs is not allocated anymore if it is already allocated
54	!
55	! 1359 2014-04-11 17:15:14Z hoffmann
56	! module lpm_init_mod added to use statements, because lpm_init has become a
57	! module
58	!
59	! 1353 2014-04-08 15:21:23Z heinze
60	! REAL constants provided with KIND-attribute
61	!
62	! 1340 2014-03-25 19:45:13Z kanani
63	! REAL constants defined as wp-kind
64	!
65	! 1322 2014-03-20 16:38:49Z raasch
66	! REAL constants defined as wp-kind
67	! module interfaces removed
68	!
69	! 1320 2014-03-20 08:40:49Z raasch
70	! ONLY-attribute added to USE-statements,
71	! kind-parameters added to all INTEGER and REAL declaration statements,
72	! kinds are defined in new module kinds,
73	! revision history before 2012 removed,
74	! comment fields (!:) to be used for variable explanations added to
75	! all variable declaration statements
76	!
77	! 1316 2014-03-17 07:44:59Z heinze
78	! Bugfix: allocation of w_subs
79	!
80	! 1299 2014-03-06 13:15:21Z heinze
81	! Allocate w_subs due to extension of large scale subsidence in combination
82	! with large scale forcing data (LSF_DATA)
83	!
84	! 1241 2013-10-30 11:36:58Z heinze
85	! Overwrite initial profiles in case of nudging
86	! Inititialize shf and qsws in case of large_scale_forcing
87	!
88	! 1221 2013-09-10 08:59:13Z raasch
89	! +rflags_s_inner in copyin statement, use copyin for most arrays instead of
90	! copy
91	!
92	! 1212 2013-08-15 08:46:27Z raasch
93	! array tri is allocated and included in data copy statement
94	!
95	! 1195 2013-07-01 12:27:57Z heinze
96	! Bugfix: move allocation of ref_state to parin.f90 and read_var_list.f90
97	!
98	! 1179 2013-06-14 05:57:58Z raasch
99	! allocate and set ref_state to be used in buoyancy terms
100	!
101	! 1171 2013-05-30 11:27:45Z raasch
102	! diss array is allocated with full size if accelerator boards are used
103	!
104	! 1159 2013-05-21 11:58:22Z fricke
105	! -bc_lr_dirneu, bc_lr_neudir, bc_ns_dirneu, bc_ns_neudir
106	!
107	! 1153 2013-05-10 14:33:08Z raasch
108	! diss array is allocated with dummy elements even if it is not needed
109	! (required by PGI 13.4 / CUDA 5.0)
110	!
111	! 1115 2013-03-26 18:16:16Z hoffmann
112	! unused variables removed
113	!
114	! 1113 2013-03-10 02:48:14Z raasch
115	! openACC directive modified
116	!
117	! 1111 2013-03-08 23:54:10Z raasch
118	! openACC directives added for pres
119	! array diss allocated only if required
120	!
121	! 1092 2013-02-02 11:24:22Z raasch
122	! unused variables removed
123	!
124	! 1065 2012-11-22 17:42:36Z hoffmann
125	! allocation of diss (dissipation rate) in case of turbulence = .TRUE. added
126	!
127	! 1053 2012-11-13 17:11:03Z hoffmann
128	! allocation and initialisation of necessary data arrays for the two-moment
129	! cloud physics scheme the two new prognostic equations (nr, qr):
130	! +dr, lambda_r, mu_r, sed_, xr, s, sws, swst, , _p, t_m, _1, _2, _3,
131	! +tend_*, prr
132	!
133	! 1036 2012-10-22 13:43:42Z raasch
134	! code put under GPL (PALM 3.9)
135	!
136	! 1032 2012-10-21 13:03:21Z letzel
137	! save memory by not allocating pt_2 in case of neutral = .T.
138	!
139	! 1025 2012-10-07 16:04:41Z letzel
140	! bugfix: swap indices of mask for ghost boundaries
141	!
142	! 1015 2012-09-27 09:23:24Z raasch
143	! mask is set to zero for ghost boundaries
144	!
145	! 1010 2012-09-20 07:59:54Z raasch
146	! cpp switch __nopointer added for pointer free version
147	!
148	! 1003 2012-09-14 14:35:53Z raasch
149	! nxra,nyna, nzta replaced ny nxr, nyn, nzt
150	!
151	! 1001 2012-09-13 14:08:46Z raasch
152	! all actions concerning leapfrog scheme removed
153	!
154	! 996 2012-09-07 10:41:47Z raasch
155	! little reformatting
156	!
157	! 978 2012-08-09 08:28:32Z fricke
158	! outflow damping layer removed
159	! roughness length for scalar quantites z0h added
160	! damping zone for the potential temperatur in case of non-cyclic lateral
161	! boundaries added
162	! initialization of ptdf_x, ptdf_y
163	! initialization of c_u_m, c_u_m_l, c_v_m, c_v_m_l, c_w_m, c_w_m_l
164	!
165	! 849 2012-03-15 10:35:09Z raasch
166	! init_particles renamed lpm_init
167	!
168	! 825 2012-02-19 03:03:44Z raasch
169	! wang_collision_kernel renamed wang_kernel
170	!
171	! Revision 1.1 1998/03/09 16:22:22 raasch
172	! Initial revision
173	!
174	!
175	! Description:
176	! ------------
177	! Allocation of arrays and initialization of the 3D model via
178	! a) pre-run the 1D model
179	! or
180	! b) pre-set constant linear profiles
181	! or
182	! c) read values of a previous run
183	!------------------------------------------------------------------------------!
184
185	USE advec_ws
186
187	USE arrays_3d
188
189	USE cloud_parameters, &
190	ONLY: nc_const, precipitation_amount, precipitation_rate, prr
191
192	USE constants, &
193	ONLY: pi
194
195	USE control_parameters
196
197	USE grid_variables, &
198	ONLY: dx, dy
199
200	USE indices
201
202	USE lpm_init_mod, &
203	ONLY: lpm_init
204
205	USE kinds
206
207	USE ls_forcing_mod
208
209	USE model_1d, &
210	ONLY: e1d, kh1d, km1d, l1d, rif1d, u1d, us1d, usws1d, v1d, vsws1d
211
212	USE netcdf_control
213
214	USE particle_attributes, &
215	ONLY: particle_advection, use_sgs_for_particles, wang_kernel
216
217	USE pegrid
218
219	USE random_function_mod
220
221	USE random_generator_parallel, &
222	ONLY: random_number_parallel, random_seed_parallel, random_dummy, &
223	id_random_array, seq_random_array
224
225	USE statistics, &
226	ONLY: hom, hom_sum, pr_palm, rmask, spectrum_x, spectrum_y, &
227	statistic_regions, sums, sums_divnew_l, sums_divold_l, sums_l, &
228	sums_l_l, sums_up_fraction_l, sums_wsts_bc_l, ts_value, &
229	var_d, weight_pres, weight_substep
230
231	USE transpose_indices
232
233	IMPLICIT NONE
234
235	INTEGER(iwp) :: i !:
236	INTEGER(iwp) :: ind_array(1) !:
237	INTEGER(iwp) :: j !:
238	INTEGER(iwp) :: k !:
239	INTEGER(iwp) :: sr !:
240
241	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ngp_2dh_l !:
242
243	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l !:
244	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_s_inner_l !:
245
246	REAL(wp), DIMENSION(1:2) :: volume_flow_area_l !:
247	REAL(wp), DIMENSION(1:2) :: volume_flow_initial_l !:
248
249	REAL(wp), DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_l !:
250	REAL(wp), DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_tmp !:
251
252
253	CALL location_message( 'allocating arrays', .FALSE. )
254	!
255	!-- Allocate arrays
256	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
257	ngp_3d(0:statistic_regions), &
258	ngp_3d_inner(0:statistic_regions), &
259	ngp_3d_inner_l(0:statistic_regions), &
260	ngp_3d_inner_tmp(0:statistic_regions), &
261	sums_divnew_l(0:statistic_regions), &
262	sums_divold_l(0:statistic_regions) )
263	ALLOCATE( dp_smooth_factor(nzb:nzt), rdf(nzb+1:nzt), rdf_sc(nzb+1:nzt) )
264	ALLOCATE( ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
265	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
266	ngp_2dh_s_inner(nzb:nzt+1,0:statistic_regions), &
267	ngp_2dh_s_inner_l(nzb:nzt+1,0:statistic_regions), &
268	rmask(nysg:nyng,nxlg:nxrg,0:statistic_regions), &
269	sums(nzb:nzt+1,pr_palm+max_pr_user), &
270	sums_l(nzb:nzt+1,pr_palm+max_pr_user,0:threads_per_task-1), &
271	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
272	sums_up_fraction_l(10,3,0:statistic_regions), &
273	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions), &
274	ts_value(dots_max,0:statistic_regions) )
275	ALLOCATE( ptdf_x(nxlg:nxrg), ptdf_y(nysg:nyng) )
276
277	ALLOCATE( rif(nysg:nyng,nxlg:nxrg), shf(nysg:nyng,nxlg:nxrg), &
278	ts(nysg:nyng,nxlg:nxrg), tswst(nysg:nyng,nxlg:nxrg), &
279	us(nysg:nyng,nxlg:nxrg), usws(nysg:nyng,nxlg:nxrg), &
280	uswst(nysg:nyng,nxlg:nxrg), vsws(nysg:nyng,nxlg:nxrg), &
281	vswst(nysg:nyng,nxlg:nxrg), z0(nysg:nyng,nxlg:nxrg), &
282	z0h(nysg:nyng,nxlg:nxrg) )
283
284	ALLOCATE( d(nzb+1:nzt,nys:nyn,nxl:nxr), &
285	kh(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
286	km(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
287	p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
288	tend(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
289
290	#if defined( __nopointer )
291	ALLOCATE( e(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
292	e_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
293	pt(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
294	pt_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
295	u(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
296	u_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
297	v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
298	v_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
299	w(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
300	w_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
301	te_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
302	tpt_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
303	tu_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
304	tv_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
305	tw_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
306	#else
307	ALLOCATE( e_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
308	e_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
309	e_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
310	pt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
311	pt_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
312	u_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
313	u_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
314	u_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
315	v_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
316	v_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
317	v_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
318	w_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
319	w_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
320	w_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
321	IF ( .NOT. neutral ) THEN
322	ALLOCATE( pt_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
323	ENDIF
324	#endif
325
326	!
327	!-- Following array is required for perturbation pressure within the iterative
328	!-- pressure solvers. For the multistep schemes (Runge-Kutta), array p holds
329	!-- the weighted average of the substeps and cannot be used in the Poisson
330	!-- solver.
331	IF ( psolver == 'sor' ) THEN
332	ALLOCATE( p_loc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
333	ELSEIF ( psolver == 'multigrid' ) THEN
334	!
335	!-- For performance reasons, multigrid is using one ghost layer only
336	ALLOCATE( p_loc(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
337	ENDIF
338
339	!
340	!-- Array for storing constant coeffficients of the tridiagonal solver
341	IF ( psolver == 'poisfft' ) THEN
342	ALLOCATE( tri(nxl_z:nxr_z,nys_z:nyn_z,0:nz-1,2) )
343	ALLOCATE( tric(nxl_z:nxr_z,nys_z:nyn_z,0:nz-1) )
344	ENDIF
345
346	IF ( humidity .OR. passive_scalar ) THEN
347	!
348	!-- 2D-humidity/scalar arrays
349	ALLOCATE ( qs(nysg:nyng,nxlg:nxrg), &
350	qsws(nysg:nyng,nxlg:nxrg), &
351	qswst(nysg:nyng,nxlg:nxrg) )
352
353	!
354	!-- 3D-humidity/scalar arrays
355	#if defined( __nopointer )
356	ALLOCATE( q(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
357	q_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
358	tq_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
359	#else
360	ALLOCATE( q_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
361	q_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
362	q_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
363	#endif
364
365	!
366	!-- 3D-arrays needed for humidity only
367	IF ( humidity ) THEN
368	#if defined( __nopointer )
369	ALLOCATE( vpt(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
370	#else
371	ALLOCATE( vpt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
372	#endif
373
374	IF ( cloud_physics ) THEN
375
376	!
377	!-- Liquid water content
378	#if defined( __nopointer )
379	ALLOCATE ( ql(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
380	#else
381	ALLOCATE ( ql_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
382	#endif
383	!
384	!-- Precipitation amount and rate (only needed if output is switched)
385	ALLOCATE( precipitation_amount(nysg:nyng,nxlg:nxrg), &
386	precipitation_rate(nysg:nyng,nxlg:nxrg) )
387
388	IF ( icloud_scheme == 0 ) THEN
389	!
390	!-- 1D-arrays
391	ALLOCATE ( nc_1d(nzb:nzt+1), pt_1d(nzb:nzt+1), &
392	q_1d(nzb:nzt+1), qc_1d(nzb:nzt+1) )
393	!
394	!-- 3D-cloud water content
395	#if defined( __nopointer )
396	ALLOCATE( qc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
397	#else
398	ALLOCATE( qc_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
399	#endif
400
401	IF ( precipitation ) THEN
402	!
403	!-- 1D-arrays
404	ALLOCATE ( nr_1d(nzb:nzt+1), qr_1d(nzb:nzt+1) )
405
406	!
407	!-- 2D-rain water content and rain drop concentration arrays
408	ALLOCATE ( qrs(nysg:nyng,nxlg:nxrg), &
409	qrsws(nysg:nyng,nxlg:nxrg), &
410	qrswst(nysg:nyng,nxlg:nxrg), &
411	nrs(nysg:nyng,nxlg:nxrg), &
412	nrsws(nysg:nyng,nxlg:nxrg), &
413	nrswst(nysg:nyng,nxlg:nxrg) )
414	!
415	!-- 3D-rain water content, rain drop concentration arrays
416	#if defined( __nopointer )
417	ALLOCATE( nr(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
418	nr_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
419	qr(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
420	qr_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
421	tnr_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
422	tqr_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
423	#else
424	ALLOCATE( nr_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
425	nr_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
426	nr_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
427	qr_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
428	qr_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
429	qr_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
430	#endif
431	!
432	!-- 3d-precipitation rate
433	ALLOCATE( prr(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
434	ENDIF
435
436	ENDIF
437	ENDIF
438
439	IF ( cloud_droplets ) THEN
440	!
441	!-- Liquid water content, change in liquid water content
442	#if defined( __nopointer )
443	ALLOCATE ( ql(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
444	ql_c(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
445	#else
446	ALLOCATE ( ql_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
447	ql_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
448	#endif
449	!
450	!-- Real volume of particles (with weighting), volume of particles
451	ALLOCATE ( ql_v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
452	ql_vp(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
453	ENDIF
454
455	ENDIF
456
457	ENDIF
458
459	IF ( ocean ) THEN
460	ALLOCATE( saswsb(nysg:nyng,nxlg:nxrg), &
461	saswst(nysg:nyng,nxlg:nxrg) )
462	#if defined( __nopointer )
463	ALLOCATE( prho(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
464	rho(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
465	sa(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
466	sa_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
467	tsa_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
468	#else
469	ALLOCATE( prho_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
470	rho_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
471	sa_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
472	sa_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
473	sa_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
474	prho => prho_1
475	rho => rho_1 ! routines calc_mean_profile and diffusion_e require
476	! density to be apointer
477	#endif
478	IF ( humidity_remote ) THEN
479	ALLOCATE( qswst_remote(nysg:nyng,nxlg:nxrg))
480	qswst_remote = 0.0_wp
481	ENDIF
482	ENDIF
483
484	!
485	!-- 3D-array for storing the dissipation, needed for calculating the sgs
486	!-- particle velocities
487	IF ( use_sgs_for_particles .OR. wang_kernel .OR. turbulence .OR. &
488	num_acc_per_node > 0 ) THEN
489	ALLOCATE( diss(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
490	ENDIF
491
492	IF ( dt_dosp /= 9999999.9_wp ) THEN
493	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
494	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
495	spectrum_x = 0.0_wp
496	spectrum_y = 0.0_wp
497
498	ALLOCATE( var_d(nzb:nzt+1) )
499	var_d = 0.0_wp
500	ENDIF
501
502	!
503	!-- 1D-array for large scale subsidence velocity
504	IF ( .NOT. ALLOCATED( w_subs ) ) THEN
505	ALLOCATE ( w_subs(nzb:nzt+1) )
506	w_subs = 0.0_wp
507	ENDIF
508
509	!
510	!-- ID-array and state-space-array for the parallel random number generator
511	IF ( random_generator == 'random-parallel' ) THEN
512	ALLOCATE ( seq_random_array(5,nysg:nyng,nxlg:nxrg) )
513	ALLOCATE ( id_random_array(0:ny,0:nx) )
514	seq_random_array = 0
515	id_random_array = 0
516	ENDIF
517
518	!
519	!-- 3D-arrays for the leaf area density and the canopy drag coefficient
520	IF ( plant_canopy ) THEN
521	ALLOCATE ( lad_s(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
522	lad_u(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
523	lad_v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
524	lad_w(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
525	cdc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
526
527	IF ( passive_scalar ) THEN
528	ALLOCATE ( sls(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
529	sec(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
530	ENDIF
531
532	IF ( cthf /= 0.0_wp ) THEN
533	ALLOCATE ( lai(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
534	canopy_heat_flux(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
535	ENDIF
536
537	ENDIF
538
539	!
540	!-- 4D-array for storing the Rif-values at vertical walls
541	IF ( topography /= 'flat' ) THEN
542	ALLOCATE( rif_wall(nzb:nzt+1,nysg:nyng,nxlg:nxrg,1:4) )
543	rif_wall = 0.0_wp
544	ENDIF
545
546	!
547	!-- Arrays to store velocity data from t-dt and the phase speeds which
548	!-- are needed for radiation boundary conditions
549	IF ( outflow_l ) THEN
550	ALLOCATE( u_m_l(nzb:nzt+1,nysg:nyng,1:2), &
551	v_m_l(nzb:nzt+1,nysg:nyng,0:1), &
552	w_m_l(nzb:nzt+1,nysg:nyng,0:1) )
553	ENDIF
554	IF ( outflow_r ) THEN
555	ALLOCATE( u_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx), &
556	v_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx), &
557	w_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx) )
558	ENDIF
559	IF ( outflow_l .OR. outflow_r ) THEN
560	ALLOCATE( c_u(nzb:nzt+1,nysg:nyng), c_v(nzb:nzt+1,nysg:nyng), &
561	c_w(nzb:nzt+1,nysg:nyng) )
562	ENDIF
563	IF ( outflow_s ) THEN
564	ALLOCATE( u_m_s(nzb:nzt+1,0:1,nxlg:nxrg), &
565	v_m_s(nzb:nzt+1,1:2,nxlg:nxrg), &
566	w_m_s(nzb:nzt+1,0:1,nxlg:nxrg) )
567	ENDIF
568	IF ( outflow_n ) THEN
569	ALLOCATE( u_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg), &
570	v_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg), &
571	w_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg) )
572	ENDIF
573	IF ( outflow_s .OR. outflow_n ) THEN
574	ALLOCATE( c_u(nzb:nzt+1,nxlg:nxrg), c_v(nzb:nzt+1,nxlg:nxrg), &
575	c_w(nzb:nzt+1,nxlg:nxrg) )
576	ENDIF
577	IF ( outflow_l .OR. outflow_r .OR. outflow_s .OR. outflow_n ) THEN
578	ALLOCATE( c_u_m_l(nzb:nzt+1), c_v_m_l(nzb:nzt+1), c_w_m_l(nzb:nzt+1) )
579	ALLOCATE( c_u_m(nzb:nzt+1), c_v_m(nzb:nzt+1), c_w_m(nzb:nzt+1) )
580	ENDIF
581
582
583	#if ! defined( __nopointer )
584	!
585	!-- Initial assignment of the pointers
586	e => e_1; e_p => e_2; te_m => e_3
587	IF ( .NOT. neutral ) THEN
588	pt => pt_1; pt_p => pt_2; tpt_m => pt_3
589	ELSE
590	pt => pt_1; pt_p => pt_1; tpt_m => pt_3
591	ENDIF
592	u => u_1; u_p => u_2; tu_m => u_3
593	v => v_1; v_p => v_2; tv_m => v_3
594	w => w_1; w_p => w_2; tw_m => w_3
595
596	IF ( humidity .OR. passive_scalar ) THEN
597	q => q_1; q_p => q_2; tq_m => q_3
598	IF ( humidity ) THEN
599	vpt => vpt_1
600	IF ( cloud_physics ) THEN
601	ql => ql_1
602	IF ( icloud_scheme == 0 ) THEN
603	qc => qc_1
604	IF ( precipitation ) THEN
605	qr => qr_1; qr_p => qr_2; tqr_m => qr_3
606	nr => nr_1; nr_p => nr_2; tnr_m => nr_3
607	ENDIF
608	ENDIF
609	ENDIF
610	ENDIF
611	IF ( cloud_droplets ) THEN
612	ql => ql_1
613	ql_c => ql_2
614	ENDIF
615	ENDIF
616
617	IF ( ocean ) THEN
618	sa => sa_1; sa_p => sa_2; tsa_m => sa_3
619	ENDIF
620	#endif
621
622	!
623	!-- Allocate arrays containing the RK coefficient for calculation of
624	!-- perturbation pressure and turbulent fluxes. At this point values are
625	!-- set for pressure calculation during initialization (where no timestep
626	!-- is done). Further below the values needed within the timestep scheme
627	!-- will be set.
628	ALLOCATE( weight_substep(1:intermediate_timestep_count_max), &
629	weight_pres(1:intermediate_timestep_count_max) )
630	weight_substep = 1.0_wp
631	weight_pres = 1.0_wp
632	intermediate_timestep_count = 1 ! needed when simulated_time = 0.0
633
634	CALL location_message( 'finished', .TRUE. )
635	!
636	!-- Initialize model variables
637	IF ( TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
638	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
639	!
640	!-- First model run of a possible job queue.
641	!-- Initial profiles of the variables must be computes.
642	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
643
644	CALL location_message( 'initializing with 1D model profiles', .FALSE. )
645	!
646	!-- Use solutions of the 1D model as initial profiles,
647	!-- start 1D model
648	CALL init_1d_model
649	!
650	!-- Transfer initial profiles to the arrays of the 3D model
651	DO i = nxlg, nxrg
652	DO j = nysg, nyng
653	e(:,j,i) = e1d
654	kh(:,j,i) = kh1d
655	km(:,j,i) = km1d
656	pt(:,j,i) = pt_init
657	u(:,j,i) = u1d
658	v(:,j,i) = v1d
659	ENDDO
660	ENDDO
661
662	IF ( humidity .OR. passive_scalar ) THEN
663	DO i = nxlg, nxrg
664	DO j = nysg, nyng
665	q(:,j,i) = q_init
666	ENDDO
667	ENDDO
668	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
669	precipitation ) THEN
670	DO i = nxlg, nxrg
671	DO j = nysg, nyng
672	qr(:,j,i) = 0.0_wp
673	nr(:,j,i) = 0.0_wp
674	ENDDO
675	ENDDO
676	!
677	!-- Initialze nc_1d with default value
678	nc_1d(:) = nc_const
679
680	ENDIF
681	ENDIF
682
683	IF ( .NOT. constant_diffusion ) THEN
684	DO i = nxlg, nxrg
685	DO j = nysg, nyng
686	e(:,j,i) = e1d
687	ENDDO
688	ENDDO
689	!
690	!-- Store initial profiles for output purposes etc.
691	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
692
693	IF ( prandtl_layer ) THEN
694	rif = rif1d(nzb+1)
695	ts = 0.0_wp ! could actually be computed more accurately in the
696	! 1D model. Update when opportunity arises.
697	us = us1d
698	usws = usws1d
699	vsws = vsws1d
700	ELSE
701	ts = 0.0_wp ! must be set, because used in
702	rif = 0.0_wp ! flowste
703	us = 0.0_wp
704	usws = 0.0_wp
705	vsws = 0.0_wp
706	ENDIF
707
708	ELSE
709	e = 0.0_wp ! must be set, because used in
710	rif = 0.0_wp ! flowste
711	ts = 0.0_wp
712	us = 0.0_wp
713	usws = 0.0_wp
714	vsws = 0.0_wp
715	ENDIF
716	uswst = top_momentumflux_u
717	vswst = top_momentumflux_v
718
719	!
720	!-- In every case qs = 0.0 (see also pt)
721	!-- This could actually be computed more accurately in the 1D model.
722	!-- Update when opportunity arises!
723	IF ( humidity .OR. passive_scalar ) THEN
724	qs = 0.0_wp
725	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
726	precipitation ) THEN
727	qrs = 0.0_wp
728	nrs = 0.0_wp
729	ENDIF
730	ENDIF
731
732	!
733	!-- inside buildings set velocities back to zero
734	IF ( topography /= 'flat' ) THEN
735	DO i = nxl-1, nxr+1
736	DO j = nys-1, nyn+1
737	u(nzb:nzb_u_inner(j,i),j,i) = 0.0_wp
738	v(nzb:nzb_v_inner(j,i),j,i) = 0.0_wp
739	ENDDO
740	ENDDO
741
742	!
743	!-- WARNING: The extra boundary conditions set after running the
744	!-- ------- 1D model impose an error on the divergence one layer
745	!-- below the topography; need to correct later
746	!-- ATTENTION: Provisional correction for Piacsek & Williams
747	!-- --------- advection scheme: keep u and v zero one layer below
748	!-- the topography.
749	IF ( ibc_uv_b == 1 ) THEN
750	!
751	!-- Neumann condition
752	DO i = nxl-1, nxr+1
753	DO j = nys-1, nyn+1
754	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
755	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
756	ENDDO
757	ENDDO
758
759	ENDIF
760
761	ENDIF
762
763	CALL location_message( 'finished', .TRUE. )
764
765	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
766	THEN
767
768	CALL location_message( 'initializing with constant profiles', .FALSE. )
769	!
770	!-- Overwrite initial profiles in case of nudging
771	IF ( nudging ) THEN
772	pt_init = ptnudge(:,1)
773	u_init = unudge(:,1)
774	v_init = vnudge(:,1)
775	IF ( humidity .OR. passive_scalar ) THEN
776	q_init = qnudge(:,1)
777	ENDIF
778
779	WRITE( message_string, * ) 'Initial profiles of u, v and ', &
780	'scalars from NUDGING_DATA are used.'
781	CALL message( 'init_3d_model', 'PA0370', 0, 0, 0, 6, 0 )
782	ENDIF
783
784	!
785	!-- Use constructed initial profiles (velocity constant with height,
786	!-- temperature profile with constant gradient)
787	DO i = nxlg, nxrg
788	DO j = nysg, nyng
789	pt(:,j,i) = pt_init
790	u(:,j,i) = u_init
791	v(:,j,i) = v_init
792	ENDDO
793	ENDDO
794
795	!
796	!-- Set initial horizontal velocities at the lowest computational grid
797	!-- levels to zero in order to avoid too small time steps caused by the
798	!-- diffusion limit in the initial phase of a run (at k=1, dz/2 occurs
799	!-- in the limiting formula!). The original values are stored to be later
800	!-- used for volume flow control.
801	IF ( ibc_uv_b /= 1 .AND. ( .NOT. bc_lr_dirrad .AND. &
802	.NOT. bc_lr_raddir .AND. &
803	.NOT. bc_ns_dirrad .AND. &
804	.NOT. bc_ns_raddir ) ) THEN
805	DO i = nxlg, nxrg
806	DO j = nysg, nyng
807	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0_wp
808	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0_wp
809	ENDDO
810	ENDDO
811	ENDIF
812
813	IF ( humidity .OR. passive_scalar ) THEN
814	DO i = nxlg, nxrg
815	DO j = nysg, nyng
816	q(:,j,i) = q_init
817	ENDDO
818	ENDDO
819	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
820	!
821	!-- Initialze nc_1d with default value
822	nc_1d(:) = nc_const
823
824	IF ( precipitation ) THEN
825	DO i = nxlg, nxrg
826	DO j = nysg, nyng
827	qr(:,j,i) = 0.0_wp
828	nr(:,j,i) = 0.0_wp
829	ENDDO
830	ENDDO
831	ENDIF
832
833	ENDIF
834	ENDIF
835
836	IF ( ocean ) THEN
837	DO i = nxlg, nxrg
838	DO j = nysg, nyng
839	sa(:,j,i) = sa_init
840	ENDDO
841	ENDDO
842	ENDIF
843
844	IF ( constant_diffusion ) THEN
845	km = km_constant
846	kh = km / prandtl_number
847	e = 0.0_wp
848	ELSEIF ( e_init > 0.0_wp ) THEN
849	DO k = nzb+1, nzt
850	km(k,:,:) = 0.1_wp * l_grid(k) * SQRT( e_init )
851	ENDDO
852	km(nzb,:,:) = km(nzb+1,:,:)
853	km(nzt+1,:,:) = km(nzt,:,:)
854	kh = km / prandtl_number
855	e = e_init
856	ELSE
857	IF ( .NOT. ocean ) THEN
858	kh = 0.01_wp ! there must exist an initial diffusion, because
859	km = 0.01_wp ! otherwise no TKE would be produced by the
860	! production terms, as long as not yet
861	! e = (u/cm)*2 at k=nzb+1
862	ELSE
863	kh = 0.00001_wp
864	km = 0.00001_wp
865	ENDIF
866	e = 0.0_wp
867	ENDIF
868	rif = 0.0_wp
869	ts = 0.0_wp
870	us = 0.0_wp
871	usws = 0.0_wp
872	uswst = top_momentumflux_u
873	vsws = 0.0_wp
874	vswst = top_momentumflux_v
875	IF ( humidity .OR. passive_scalar ) qs = 0.0_wp
876
877	!
878	!-- Compute initial temperature field and other constants used in case
879	!-- of a sloping surface
880	IF ( sloping_surface ) CALL init_slope
881
882	CALL location_message( 'finished', .TRUE. )
883
884	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
885	THEN
886
887	CALL location_message( 'initializing by user', .FALSE. )
888	!
889	!-- Initialization will completely be done by the user
890	CALL user_init_3d_model
891
892	CALL location_message( 'finished', .TRUE. )
893
894	ENDIF
895
896	CALL location_message( 'initializing statistics, boundary conditions, etc.', &
897	.FALSE. )
898
899	!
900	!-- Bottom boundary
901	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2 ) THEN
902	u(nzb,:,:) = 0.0_wp
903	v(nzb,:,:) = 0.0_wp
904	ENDIF
905
906	!
907	!-- Apply channel flow boundary condition
908	IF ( TRIM( bc_uv_t ) == 'dirichlet_0' ) THEN
909	u(nzt+1,:,:) = 0.0_wp
910	v(nzt+1,:,:) = 0.0_wp
911	ENDIF
912
913	!
914	!-- Calculate virtual potential temperature
915	IF ( humidity ) vpt = pt * ( 1.0_wp + 0.61_wp * q )
916
917	!
918	!-- Store initial profiles for output purposes etc.
919	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
920	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
921	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2) THEN
922	hom(nzb,1,5,:) = 0.0_wp
923	hom(nzb,1,6,:) = 0.0_wp
924	ENDIF
925	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
926	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
927	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
928
929	IF ( ocean ) THEN
930	!
931	!-- Store initial salinity profile
932	hom(:,1,26,:) = SPREAD( sa(:,nys,nxl), 2, statistic_regions+1 )
933	ENDIF
934
935	IF ( humidity ) THEN
936	!
937	!-- Store initial profile of total water content, virtual potential
938	!-- temperature
939	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
940	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
941	IF ( cloud_physics .OR. cloud_droplets ) THEN
942	!
943	!-- Store initial profile of specific humidity and potential
944	!-- temperature
945	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
946	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
947	ENDIF
948	ENDIF
949
950	IF ( passive_scalar ) THEN
951	!
952	!-- Store initial scalar profile
953	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
954	ENDIF
955
956	!
957	!-- Initialize the random number generators (from numerical recipes)
958	CALL random_function_ini
959
960	IF ( random_generator == 'random-parallel' ) THEN
961	!-- Asigning an ID to every vertical gridpoint column
962	!-- dependig on the ensemble run number.
963	random_dummy=1
964	DO j=0,ny
965	DO i=0,nx
966	id_random_array(j,i) = random_dummy + 1E6 * ( ensemble_member_nr - 1000 )
967	random_dummy = random_dummy + 1
968	END DO
969	ENDDO
970	!-- Initializing with random_seed_parallel for every vertical
971	!-- gridpoint column.
972	random_dummy=0
973	DO j = nysg, nyng
974	DO i = nxlg, nxrg
975	CALL random_seed_parallel (random_sequence=id_random_array(j, i))
976	CALL random_number_parallel (random_dummy)
977	CALL random_seed_parallel (get=seq_random_array(:, j, i))
978	END DO
979	ENDDO
980	ENDIF
981
982	!
983	!-- Initialize fluxes at bottom surface
984	IF ( use_surface_fluxes ) THEN
985
986	IF ( constant_heatflux ) THEN
987	!
988	!-- Heat flux is prescribed
989	IF ( random_heatflux ) THEN
990	CALL disturb_heatflux
991	ELSE
992	shf = surface_heatflux
993	!
994	!-- Initialize shf with data from external file LSF_DATA
995	IF ( large_scale_forcing .AND. lsf_surf ) THEN
996	CALL ls_forcing_surf ( simulated_time )
997	ENDIF
998
999	!
1000	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
1001	IF ( TRIM( topography ) /= 'flat' ) THEN
1002	DO i = nxlg, nxrg
1003	DO j = nysg, nyng
1004	IF ( nzb_s_inner(j,i) /= 0 ) THEN
1005	shf(j,i) = wall_heatflux(0)
1006	ENDIF
1007	ENDDO
1008	ENDDO
1009	ENDIF
1010	ENDIF
1011	ENDIF
1012
1013	!
1014	!-- Determine the near-surface water flux
1015	IF ( humidity .OR. passive_scalar ) THEN
1016	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1017	precipitation ) THEN
1018	qrsws = 0.0_wp
1019	nrsws = 0.0_wp
1020	ENDIF
1021	IF ( constant_waterflux ) THEN
1022	qsws = surface_waterflux
1023	!
1024	!-- Over topography surface_waterflux is replaced by
1025	!-- wall_humidityflux(0)
1026	IF ( TRIM( topography ) /= 'flat' ) THEN
1027	wall_qflux = wall_humidityflux
1028	DO i = nxlg, nxrg
1029	DO j = nysg, nyng
1030	IF ( nzb_s_inner(j,i) /= 0 ) THEN
1031	qsws(j,i) = wall_qflux(0)
1032	ENDIF
1033	ENDDO
1034	ENDDO
1035	ENDIF
1036	ENDIF
1037	ENDIF
1038
1039	ENDIF
1040
1041	!
1042	!-- Initialize fluxes at top surface
1043	!-- Currently, only the heatflux and salinity flux can be prescribed.
1044	!-- The latent flux is zero in this case!
1045	IF ( use_top_fluxes ) THEN
1046
1047	IF ( constant_top_heatflux ) THEN
1048	!
1049	!-- Heat flux is prescribed
1050	tswst = top_heatflux
1051
1052	IF ( humidity .OR. passive_scalar ) THEN
1053	qswst = 0.0_wp
1054	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1055	precipitation ) THEN
1056	nrswst = 0.0_wp
1057	qrswst = 0.0_wp
1058	ENDIF
1059	ENDIF
1060
1061	IF ( ocean ) THEN
1062	saswsb = bottom_salinityflux
1063	saswst = top_salinityflux
1064	ENDIF
1065	ENDIF
1066
1067	!
1068	!-- Initialization in case of a coupled model run
1069	IF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
1070	tswst = 0.0_wp
1071	ENDIF
1072
1073	ENDIF
1074
1075	!
1076	!-- Initialize Prandtl layer quantities
1077	IF ( prandtl_layer ) THEN
1078
1079	z0 = roughness_length
1080	z0h = z0h_factor * z0
1081
1082	IF ( .NOT. constant_heatflux ) THEN
1083	!
1084	!-- Surface temperature is prescribed. Here the heat flux cannot be
1085	!-- simply estimated, because therefore rif, u* and theta* would have
1086	!-- to be computed by iteration. This is why the heat flux is assumed
1087	!-- to be zero before the first time step. It approaches its correct
1088	!-- value in the course of the first few time steps.
1089	shf = 0.0_wp
1090	ENDIF
1091
1092	IF ( humidity .OR. passive_scalar ) THEN
1093	IF ( .NOT. constant_waterflux ) qsws = 0.0_wp
1094	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1095	precipitation ) THEN
1096	qrsws = 0.0_wp
1097	nrsws = 0.0_wp
1098	ENDIF
1099	ENDIF
1100
1101	ENDIF
1102
1103	!
1104	!-- Set the reference state to be used in the buoyancy terms (for ocean runs
1105	!-- the reference state will be set (overwritten) in init_ocean)
1106	IF ( use_single_reference_value ) THEN
1107	IF ( .NOT. humidity ) THEN
1108	ref_state(:) = pt_reference
1109	ELSE
1110	ref_state(:) = vpt_reference
1111	ENDIF
1112	ELSE
1113	IF ( .NOT. humidity ) THEN
1114	ref_state(:) = pt_init(:)
1115	ELSE
1116	ref_state(:) = vpt(:,nys,nxl)
1117	ENDIF
1118	ENDIF
1119
1120	!
1121	!-- For the moment, vertical velocity is zero
1122	w = 0.0_wp
1123
1124	!
1125	!-- Initialize array sums (must be defined in first call of pres)
1126	sums = 0.0_wp
1127
1128	!
1129	!-- In case of iterative solvers, p must get an initial value
1130	IF ( psolver == 'multigrid' .OR. psolver == 'sor' ) p = 0.0_wp
1131
1132	!
1133	!-- Treating cloud physics, liquid water content and precipitation amount
1134	!-- are zero at beginning of the simulation
1135	IF ( cloud_physics ) THEN
1136	ql = 0.0_wp
1137	IF ( precipitation ) precipitation_amount = 0.0_wp
1138	IF ( icloud_scheme == 0 ) THEN
1139	qc = 0.0_wp
1140	nc_1d = nc_const
1141	ENDIF
1142	ENDIF
1143	!
1144	!-- Impose vortex with vertical axis on the initial velocity profile
1145	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
1146	CALL init_rankine
1147	ENDIF
1148
1149	!
1150	!-- Impose temperature anomaly (advection test only)
1151	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
1152	CALL init_pt_anomaly
1153	ENDIF
1154
1155	!
1156	!-- If required, change the surface temperature at the start of the 3D run
1157	IF ( pt_surface_initial_change /= 0.0_wp ) THEN
1158	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
1159	ENDIF
1160
1161	!
1162	!-- If required, change the surface humidity/scalar at the start of the 3D
1163	!-- run
1164	IF ( ( humidity .OR. passive_scalar ) .AND. &
1165	q_surface_initial_change /= 0.0_wp ) THEN
1166	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
1167	ENDIF
1168
1169	!
1170	!-- Initialize old and new time levels.
1171	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
1172	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
1173
1174	IF ( humidity .OR. passive_scalar ) THEN
1175	tq_m = 0.0_wp
1176	q_p = q
1177	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1178	precipitation ) THEN
1179	tqr_m = 0.0_wp
1180	qr_p = qr
1181	tnr_m = 0.0_wp
1182	nr_p = nr
1183	ENDIF
1184	ENDIF
1185
1186	IF ( ocean ) THEN
1187	tsa_m = 0.0_wp
1188	sa_p = sa
1189	ENDIF
1190
1191	CALL location_message( 'finished', .TRUE. )
1192
1193	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' .OR. &
1194	TRIM( initializing_actions ) == 'cyclic_fill' ) &
1195	THEN
1196
1197	CALL location_message( 'initializing in case of restart / cyclic_fill', &
1198	.FALSE. )
1199	!
1200	!-- When reading data for cyclic fill of 3D prerun data files, read
1201	!-- some of the global variables from the restart file which are required
1202	!-- for initializing the inflow
1203	IF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1204
1205	DO i = 0, io_blocks-1
1206	IF ( i == io_group ) THEN
1207	CALL read_parts_of_var_list
1208	CALL close_file( 13 )
1209	ENDIF
1210	#if defined( __parallel )
1211	CALL MPI_BARRIER( comm2d, ierr )
1212	#endif
1213	ENDDO
1214
1215	ENDIF
1216
1217	!
1218	!-- Read binary data from restart file
1219	DO i = 0, io_blocks-1
1220	IF ( i == io_group ) THEN
1221	CALL read_3d_binary
1222	ENDIF
1223	#if defined( __parallel )
1224	CALL MPI_BARRIER( comm2d, ierr )
1225	#endif
1226	ENDDO
1227
1228	!
1229	!-- Initialization of the turbulence recycling method
1230	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. &
1231	turbulent_inflow ) THEN
1232	!
1233	!-- First store the profiles to be used at the inflow.
1234	!-- These profiles are the (temporally) and horizontally averaged vertical
1235	!-- profiles from the prerun. Alternatively, prescribed profiles
1236	!-- for u,v-components can be used.
1237	ALLOCATE( mean_inflow_profiles(nzb:nzt+1,5) )
1238
1239	IF ( use_prescribed_profile_data ) THEN
1240	mean_inflow_profiles(:,1) = u_init ! u
1241	mean_inflow_profiles(:,2) = v_init ! v
1242	ELSE
1243	mean_inflow_profiles(:,1) = hom_sum(:,1,0) ! u
1244	mean_inflow_profiles(:,2) = hom_sum(:,2,0) ! v
1245	ENDIF
1246	mean_inflow_profiles(:,4) = hom_sum(:,4,0) ! pt
1247	mean_inflow_profiles(:,5) = hom_sum(:,8,0) ! e
1248
1249	!
1250	!-- If necessary, adjust the horizontal flow field to the prescribed
1251	!-- profiles
1252	IF ( use_prescribed_profile_data ) THEN
1253	DO i = nxlg, nxrg
1254	DO j = nysg, nyng
1255	DO k = nzb, nzt+1
1256	u(k,j,i) = u(k,j,i) - hom_sum(k,1,0) + u_init(k)
1257	v(k,j,i) = v(k,j,i) - hom_sum(k,2,0) + v_init(k)
1258	ENDDO
1259	ENDDO
1260	ENDDO
1261	ENDIF
1262
1263	!
1264	!-- Use these mean profiles at the inflow (provided that Dirichlet
1265	!-- conditions are used)
1266	IF ( inflow_l ) THEN
1267	DO j = nysg, nyng
1268	DO k = nzb, nzt+1
1269	u(k,j,nxlg:-1) = mean_inflow_profiles(k,1)
1270	v(k,j,nxlg:-1) = mean_inflow_profiles(k,2)
1271	w(k,j,nxlg:-1) = 0.0_wp
1272	pt(k,j,nxlg:-1) = mean_inflow_profiles(k,4)
1273	e(k,j,nxlg:-1) = mean_inflow_profiles(k,5)
1274	ENDDO
1275	ENDDO
1276	ENDIF
1277
1278	!
1279	!-- Calculate the damping factors to be used at the inflow. For a
1280	!-- turbulent inflow the turbulent fluctuations have to be limited
1281	!-- vertically because otherwise the turbulent inflow layer will grow
1282	!-- in time.
1283	IF ( inflow_damping_height == 9999999.9_wp ) THEN
1284	!
1285	!-- Default: use the inversion height calculated by the prerun; if
1286	!-- this is zero, inflow_damping_height must be explicitly
1287	!-- specified.
1288	IF ( hom_sum(nzb+6,pr_palm,0) /= 0.0_wp ) THEN
1289	inflow_damping_height = hom_sum(nzb+6,pr_palm,0)
1290	ELSE
1291	WRITE( message_string, * ) 'inflow_damping_height must be ',&
1292	'explicitly specified because&the inversion height ', &
1293	'calculated by the prerun is zero.'
1294	CALL message( 'init_3d_model', 'PA0318', 1, 2, 0, 6, 0 )
1295	ENDIF
1296
1297	ENDIF
1298
1299	IF ( inflow_damping_width == 9999999.9_wp ) THEN
1300	!
1301	!-- Default for the transition range: one tenth of the undamped
1302	!-- layer
1303	inflow_damping_width = 0.1_wp * inflow_damping_height
1304
1305	ENDIF
1306
1307	ALLOCATE( inflow_damping_factor(nzb:nzt+1) )
1308
1309	DO k = nzb, nzt+1
1310
1311	IF ( zu(k) <= inflow_damping_height ) THEN
1312	inflow_damping_factor(k) = 1.0_wp
1313	ELSEIF ( zu(k) <= ( inflow_damping_height + inflow_damping_width ) ) THEN
1314	inflow_damping_factor(k) = 1.0_wp - &
1315	( zu(k) - inflow_damping_height ) / &
1316	inflow_damping_width
1317	ELSE
1318	inflow_damping_factor(k) = 0.0_wp
1319	ENDIF
1320
1321	ENDDO
1322
1323	ENDIF
1324
1325	!
1326	!-- Inside buildings set velocities and TKE back to zero
1327	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. &
1328	topography /= 'flat' ) THEN
1329	!
1330	!-- Inside buildings set velocities and TKE back to zero.
1331	!-- Other scalars (pt, q, s, km, kh, p, sa, ...) are ignored at present,
1332	!-- maybe revise later.
1333	DO i = nxlg, nxrg
1334	DO j = nysg, nyng
1335	u (nzb:nzb_u_inner(j,i),j,i) = 0.0_wp
1336	v (nzb:nzb_v_inner(j,i),j,i) = 0.0_wp
1337	w (nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1338	e (nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1339	tu_m(nzb:nzb_u_inner(j,i),j,i) = 0.0_wp
1340	tv_m(nzb:nzb_v_inner(j,i),j,i) = 0.0_wp
1341	tw_m(nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1342	te_m(nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1343	tpt_m(nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1344	ENDDO
1345	ENDDO
1346
1347	ENDIF
1348
1349	!
1350	!-- Calculate initial temperature field and other constants used in case
1351	!-- of a sloping surface
1352	IF ( sloping_surface ) CALL init_slope
1353
1354	!
1355	!-- Initialize new time levels (only done in order to set boundary values
1356	!-- including ghost points)
1357	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
1358	IF ( humidity .OR. passive_scalar ) THEN
1359	q_p = q
1360	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1361	precipitation ) THEN
1362	qr_p = qr
1363	nr_p = nr
1364	ENDIF
1365	ENDIF
1366	IF ( ocean ) sa_p = sa
1367
1368	!
1369	!-- Allthough tendency arrays are set in prognostic_equations, they have
1370	!-- have to be predefined here because they are used (but multiplied with 0)
1371	!-- there before they are set.
1372	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
1373	IF ( humidity .OR. passive_scalar ) THEN
1374	tq_m = 0.0_wp
1375	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1376	precipitation ) THEN
1377	tqr_m = 0.0_wp
1378	tnr_m = 0.0_wp
1379	ENDIF
1380	ENDIF
1381	IF ( ocean ) tsa_m = 0.0_wp
1382
1383	CALL location_message( 'finished', .TRUE. )
1384
1385	ELSE
1386	!
1387	!-- Actually this part of the programm should not be reached
1388	message_string = 'unknown initializing problem'
1389	CALL message( 'init_3d_model', 'PA0193', 1, 2, 0, 6, 0 )
1390	ENDIF
1391
1392
1393	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1394	!
1395	!-- Initialize old timelevels needed for radiation boundary conditions
1396	IF ( outflow_l ) THEN
1397	u_m_l(:,:,:) = u(:,:,1:2)
1398	v_m_l(:,:,:) = v(:,:,0:1)
1399	w_m_l(:,:,:) = w(:,:,0:1)
1400	ENDIF
1401	IF ( outflow_r ) THEN
1402	u_m_r(:,:,:) = u(:,:,nx-1:nx)
1403	v_m_r(:,:,:) = v(:,:,nx-1:nx)
1404	w_m_r(:,:,:) = w(:,:,nx-1:nx)
1405	ENDIF
1406	IF ( outflow_s ) THEN
1407	u_m_s(:,:,:) = u(:,0:1,:)
1408	v_m_s(:,:,:) = v(:,1:2,:)
1409	w_m_s(:,:,:) = w(:,0:1,:)
1410	ENDIF
1411	IF ( outflow_n ) THEN
1412	u_m_n(:,:,:) = u(:,ny-1:ny,:)
1413	v_m_n(:,:,:) = v(:,ny-1:ny,:)
1414	w_m_n(:,:,:) = w(:,ny-1:ny,:)
1415	ENDIF
1416
1417	ENDIF
1418
1419	!
1420	!-- Calculate the initial volume flow at the right and north boundary
1421	IF ( conserve_volume_flow ) THEN
1422
1423	IF ( use_prescribed_profile_data ) THEN
1424
1425	volume_flow_initial_l = 0.0_wp
1426	volume_flow_area_l = 0.0_wp
1427
1428	IF ( nxr == nx ) THEN
1429	DO j = nys, nyn
1430	DO k = nzb_2d(j,nx)+1, nzt
1431	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1432	u_init(k) * dzw(k)
1433	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1434	ENDDO
1435	ENDDO
1436	ENDIF
1437
1438	IF ( nyn == ny ) THEN
1439	DO i = nxl, nxr
1440	DO k = nzb_2d(ny,i)+1, nzt
1441	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1442	v_init(k) * dzw(k)
1443	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1444	ENDDO
1445	ENDDO
1446	ENDIF
1447
1448	#if defined( __parallel )
1449	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1450	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1451	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1452	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1453
1454	#else
1455	volume_flow_initial = volume_flow_initial_l
1456	volume_flow_area = volume_flow_area_l
1457	#endif
1458
1459	ELSEIF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1460
1461	volume_flow_initial_l = 0.0_wp
1462	volume_flow_area_l = 0.0_wp
1463
1464	IF ( nxr == nx ) THEN
1465	DO j = nys, nyn
1466	DO k = nzb_2d(j,nx)+1, nzt
1467	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1468	hom_sum(k,1,0) * dzw(k)
1469	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1470	ENDDO
1471	ENDDO
1472	ENDIF
1473
1474	IF ( nyn == ny ) THEN
1475	DO i = nxl, nxr
1476	DO k = nzb_2d(ny,i)+1, nzt
1477	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1478	hom_sum(k,2,0) * dzw(k)
1479	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1480	ENDDO
1481	ENDDO
1482	ENDIF
1483
1484	#if defined( __parallel )
1485	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1486	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1487	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1488	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1489
1490	#else
1491	volume_flow_initial = volume_flow_initial_l
1492	volume_flow_area = volume_flow_area_l
1493	#endif
1494
1495	ELSEIF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1496
1497	volume_flow_initial_l = 0.0_wp
1498	volume_flow_area_l = 0.0_wp
1499
1500	IF ( nxr == nx ) THEN
1501	DO j = nys, nyn
1502	DO k = nzb_2d(j,nx)+1, nzt
1503	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1504	u(k,j,nx) * dzw(k)
1505	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1506	ENDDO
1507	ENDDO
1508	ENDIF
1509
1510	IF ( nyn == ny ) THEN
1511	DO i = nxl, nxr
1512	DO k = nzb_2d(ny,i)+1, nzt
1513	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1514	v(k,ny,i) * dzw(k)
1515	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1516	ENDDO
1517	ENDDO
1518	ENDIF
1519
1520	#if defined( __parallel )
1521	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1522	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1523	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1524	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1525
1526	#else
1527	volume_flow_initial = volume_flow_initial_l
1528	volume_flow_area = volume_flow_area_l
1529	#endif
1530
1531	ENDIF
1532
1533	!
1534	!-- In case of 'bulk_velocity' mode, volume_flow_initial is calculated
1535	!-- from u\|v_bulk instead
1536	IF ( TRIM( conserve_volume_flow_mode ) == 'bulk_velocity' ) THEN
1537	volume_flow_initial(1) = u_bulk * volume_flow_area(1)
1538	volume_flow_initial(2) = v_bulk * volume_flow_area(2)
1539	ENDIF
1540
1541	ENDIF
1542
1543	!
1544	!-- Initialize quantities for special advections schemes
1545	CALL init_advec
1546
1547	!
1548	!-- Impose random perturbation on the horizontal velocity field and then
1549	!-- remove the divergences from the velocity field at the initial stage
1550	IF ( create_disturbances .AND. &
1551	TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
1552	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
1553
1554	CALL location_message( 'creating initial disturbances', .FALSE. )
1555	CALL disturb_field( nzb_u_inner, tend, u )
1556	CALL disturb_field( nzb_v_inner, tend, v )
1557	CALL location_message( 'finished', .TRUE. )
1558
1559	CALL location_message( 'calling pressure solver', .FALSE. )
1560	n_sor = nsor_ini
1561	!$acc data copyin( d, ddzu, ddzw, nzb_s_inner, nzb_u_inner ) &
1562	!$acc copyin( nzb_v_inner, nzb_w_inner, p, rflags_s_inner, tend ) &
1563	!$acc copyin( weight_pres, weight_substep ) &
1564	!$acc copy( tri, tric, u, v, w )
1565	CALL pres
1566	!$acc end data
1567	n_sor = nsor
1568	CALL location_message( 'finished', .TRUE. )
1569
1570	ENDIF
1571
1572	!
1573	!-- Initialization of the leaf area density
1574	IF ( plant_canopy ) THEN
1575
1576	SELECT CASE ( TRIM( canopy_mode ) )
1577
1578	CASE( 'block' )
1579
1580	DO i = nxlg, nxrg
1581	DO j = nysg, nyng
1582	lad_s(:,j,i) = lad(:)
1583	cdc(:,j,i) = drag_coefficient
1584	IF ( passive_scalar ) THEN
1585	sls(:,j,i) = leaf_surface_concentration
1586	sec(:,j,i) = scalar_exchange_coefficient
1587	ENDIF
1588	ENDDO
1589	ENDDO
1590
1591	CASE DEFAULT
1592
1593	!
1594	!-- The DEFAULT case is reached either if the parameter
1595	!-- canopy mode contains a wrong character string or if the
1596	!-- user has coded a special case in the user interface.
1597	!-- There, the subroutine user_init_plant_canopy checks
1598	!-- which of these two conditions applies.
1599	CALL user_init_plant_canopy
1600
1601	END SELECT
1602
1603	CALL exchange_horiz( lad_s, nbgp )
1604	CALL exchange_horiz( cdc, nbgp )
1605
1606	IF ( passive_scalar ) THEN
1607	CALL exchange_horiz( sls, nbgp )
1608	CALL exchange_horiz( sec, nbgp )
1609	ENDIF
1610
1611	!
1612	!-- Sharp boundaries of the plant canopy in horizontal directions
1613	!-- In vertical direction the interpolation is retained, as the leaf
1614	!-- area density is initialised by prescribing a vertical profile
1615	!-- consisting of piecewise linear segments. The upper boundary
1616	!-- of the plant canopy is now defined by lad_w(pch_index,:,:) = 0.0.
1617
1618	DO i = nxl, nxr
1619	DO j = nys, nyn
1620	DO k = nzb, nzt+1
1621	IF ( lad_s(k,j,i) > 0.0_wp ) THEN
1622	lad_u(k,j,i) = lad_s(k,j,i)
1623	lad_u(k,j,i+1) = lad_s(k,j,i)
1624	lad_v(k,j,i) = lad_s(k,j,i)
1625	lad_v(k,j+1,i) = lad_s(k,j,i)
1626	ENDIF
1627	ENDDO
1628	DO k = nzb, nzt
1629	lad_w(k,j,i) = 0.5_wp * ( lad_s(k+1,j,i) + lad_s(k,j,i) )
1630	ENDDO
1631	ENDDO
1632	ENDDO
1633
1634	lad_w(pch_index,:,:) = 0.0_wp
1635	lad_w(nzt+1,:,:) = lad_w(nzt,:,:)
1636
1637	CALL exchange_horiz( lad_u, nbgp )
1638	CALL exchange_horiz( lad_v, nbgp )
1639	CALL exchange_horiz( lad_w, nbgp )
1640
1641	!
1642	!-- Initialisation of the canopy heat source distribution
1643	IF ( cthf /= 0.0_wp ) THEN
1644	!
1645	!-- Piecewise evaluation of the leaf area index by
1646	!-- integration of the leaf area density
1647	lai(:,:,:) = 0.0_wp
1648	DO i = nxlg, nxrg
1649	DO j = nysg, nyng
1650	DO k = pch_index-1, 0, -1
1651	lai(k,j,i) = lai(k+1,j,i) + &
1652	( 0.5_wp * ( lad_w(k+1,j,i) + &
1653	lad_s(k+1,j,i) ) * &
1654	( zw(k+1) - zu(k+1) ) ) + &
1655	( 0.5_wp * ( lad_w(k,j,i) + &
1656	lad_s(k+1,j,i) ) * &
1657	( zu(k+1) - zw(k) ) )
1658	ENDDO
1659	ENDDO
1660	ENDDO
1661
1662	!
1663	!-- Evaluation of the upward kinematic vertical heat flux within the
1664	!-- canopy
1665	DO i = nxlg, nxrg
1666	DO j = nysg, nyng
1667	DO k = 0, pch_index
1668	canopy_heat_flux(k,j,i) = cthf * &
1669	exp( -0.6_wp * lai(k,j,i) )
1670	ENDDO
1671	ENDDO
1672	ENDDO
1673
1674	!
1675	!-- The near surface heat flux is derived from the heat flux
1676	!-- distribution within the canopy
1677	shf(:,:) = canopy_heat_flux(0,:,:)
1678
1679	ENDIF
1680
1681	ENDIF
1682
1683	!
1684	!-- If required, initialize dvrp-software
1685	IF ( dt_dvrp /= 9999999.9_wp ) CALL init_dvrp
1686
1687	IF ( ocean ) THEN
1688	!
1689	!-- Initialize quantities needed for the ocean model
1690	CALL init_ocean
1691
1692	ELSE
1693	!
1694	!-- Initialize quantities for handling cloud physics
1695	!-- This routine must be called before lpm_init, because
1696	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
1697	!-- lpm_init) is not defined.
1698	CALL init_cloud_physics
1699	ENDIF
1700
1701	!
1702	!-- If required, initialize particles
1703	IF ( particle_advection ) CALL lpm_init
1704
1705	!
1706	!-- Initialize the ws-scheme.
1707	IF ( ws_scheme_sca .OR. ws_scheme_mom ) CALL ws_init
1708
1709	!
1710	!-- Setting weighting factors for calculation of perturbation pressure
1711	!-- and turbulent quantities from the RK substeps
1712	IF ( TRIM(timestep_scheme) == 'runge-kutta-3' ) THEN ! for RK3-method
1713
1714	weight_substep(1) = 1._wp/6._wp
1715	weight_substep(2) = 3._wp/10._wp
1716	weight_substep(3) = 8._wp/15._wp
1717
1718	weight_pres(1) = 1._wp/3._wp
1719	weight_pres(2) = 5._wp/12._wp
1720	weight_pres(3) = 1._wp/4._wp
1721
1722	ELSEIF ( TRIM(timestep_scheme) == 'runge-kutta-2' ) THEN ! for RK2-method
1723
1724	weight_substep(1) = 1._wp/2._wp
1725	weight_substep(2) = 1._wp/2._wp
1726
1727	weight_pres(1) = 1._wp/2._wp
1728	weight_pres(2) = 1._wp/2._wp
1729
1730	ELSE ! for Euler-method
1731
1732	weight_substep(1) = 1.0_wp
1733	weight_pres(1) = 1.0_wp
1734
1735	ENDIF
1736
1737	!
1738	!-- Initialize Rayleigh damping factors
1739	rdf = 0.0_wp
1740	rdf_sc = 0.0_wp
1741	IF ( rayleigh_damping_factor /= 0.0_wp ) THEN
1742	IF ( .NOT. ocean ) THEN
1743	DO k = nzb+1, nzt
1744	IF ( zu(k) >= rayleigh_damping_height ) THEN
1745	rdf(k) = rayleigh_damping_factor * &
1746	( SIN( pi * 0.5_wp * ( zu(k) - rayleigh_damping_height ) &
1747	/ ( zu(nzt) - rayleigh_damping_height ) )&
1748	)**2
1749	ENDIF
1750	ENDDO
1751	ELSE
1752	DO k = nzt, nzb+1, -1
1753	IF ( zu(k) <= rayleigh_damping_height ) THEN
1754	rdf(k) = rayleigh_damping_factor * &
1755	( SIN( pi * 0.5_wp * ( rayleigh_damping_height - zu(k) ) &
1756	/ ( rayleigh_damping_height - zu(nzb+1)))&
1757	)**2
1758	ENDIF
1759	ENDDO
1760	ENDIF
1761	ENDIF
1762	IF ( scalar_rayleigh_damping ) rdf_sc = rdf
1763
1764	!
1765	!-- Initialize the starting level and the vertical smoothing factor used for
1766	!-- the external pressure gradient
1767	dp_smooth_factor = 1.0_wp
1768	IF ( dp_external ) THEN
1769	!
1770	!-- Set the starting level dp_level_ind_b only if it has not been set before
1771	!-- (e.g. in init_grid).
1772	IF ( dp_level_ind_b == 0 ) THEN
1773	ind_array = MINLOC( ABS( dp_level_b - zu ) )
1774	dp_level_ind_b = ind_array(1) - 1 + nzb
1775	! MINLOC uses lower array bound 1
1776	ENDIF
1777	IF ( dp_smooth ) THEN
1778	dp_smooth_factor(:dp_level_ind_b) = 0.0_wp
1779	DO k = dp_level_ind_b+1, nzt
1780	dp_smooth_factor(k) = 0.5_wp * ( 1.0_wp + SIN( pi * &
1781	( REAL( k - dp_level_ind_b, KIND=wp ) / &
1782	REAL( nzt - dp_level_ind_b, KIND=wp ) - 0.5_wp ) ) )
1783	ENDDO
1784	ENDIF
1785	ENDIF
1786
1787	!
1788	!-- Initialize damping zone for the potential temperature in case of
1789	!-- non-cyclic lateral boundaries. The damping zone has the maximum value
1790	!-- at the inflow boundary and decreases to zero at pt_damping_width.
1791	ptdf_x = 0.0_wp
1792	ptdf_y = 0.0_wp
1793	IF ( bc_lr_dirrad ) THEN
1794	DO i = nxl, nxr
1795	IF ( ( i * dx ) < pt_damping_width ) THEN
1796	ptdf_x(i) = pt_damping_factor * ( SIN( pi * 0.5_wp * &
1797	REAL( pt_damping_width - i * dx, KIND=wp ) / ( &
1798	REAL( pt_damping_width, KIND=wp ) ) ) )**2
1799	ENDIF
1800	ENDDO
1801	ELSEIF ( bc_lr_raddir ) THEN
1802	DO i = nxl, nxr
1803	IF ( ( i * dx ) > ( nx * dx - pt_damping_width ) ) THEN
1804	ptdf_x(i) = pt_damping_factor * &
1805	SIN( pi * 0.5_wp * &
1806	( ( i - nx ) * dx + pt_damping_width ) / &
1807	REAL( pt_damping_width, KIND=wp ) )**2
1808	ENDIF
1809	ENDDO
1810	ELSEIF ( bc_ns_dirrad ) THEN
1811	DO j = nys, nyn
1812	IF ( ( j * dy ) > ( ny * dy - pt_damping_width ) ) THEN
1813	ptdf_y(j) = pt_damping_factor * &
1814	SIN( pi * 0.5_wp * &
1815	( ( j - ny ) * dy + pt_damping_width ) / &
1816	REAL( pt_damping_width, KIND=wp ) )**2
1817	ENDIF
1818	ENDDO
1819	ELSEIF ( bc_ns_raddir ) THEN
1820	DO j = nys, nyn
1821	IF ( ( j * dy ) < pt_damping_width ) THEN
1822	ptdf_y(j) = pt_damping_factor * &
1823	SIN( pi * 0.5_wp * &
1824	( pt_damping_width - j * dy ) / &
1825	REAL( pt_damping_width, KIND=wp ) )**2
1826	ENDIF
1827	ENDDO
1828	ENDIF
1829
1830	!
1831	!-- Initialize local summation arrays for routine flow_statistics.
1832	!-- This is necessary because they may not yet have been initialized when they
1833	!-- are called from flow_statistics (or - depending on the chosen model run -
1834	!-- are never initialized)
1835	sums_divnew_l = 0.0_wp
1836	sums_divold_l = 0.0_wp
1837	sums_l_l = 0.0_wp
1838	sums_up_fraction_l = 0.0_wp
1839	sums_wsts_bc_l = 0.0_wp
1840
1841	!
1842	!-- Pre-set masks for regional statistics. Default is the total model domain.
1843	!-- Ghost points are excluded because counting values at the ghost boundaries
1844	!-- would bias the statistics
1845	rmask = 1.0_wp
1846	rmask(:,nxlg:nxl-1,:) = 0.0_wp; rmask(:,nxr+1:nxrg,:) = 0.0_wp
1847	rmask(nysg:nys-1,:,:) = 0.0_wp; rmask(nyn+1:nyng,:,:) = 0.0_wp
1848
1849	!
1850	!-- User-defined initializing actions. Check afterwards, if maximum number
1851	!-- of allowed timeseries is exceeded
1852	CALL user_init
1853
1854	IF ( dots_num > dots_max ) THEN
1855	WRITE( message_string, * ) 'number of time series quantities exceeds', &
1856	' its maximum of dots_max = ', dots_max, &
1857	' &Please increase dots_max in modules.f90.'
1858	CALL message( 'init_3d_model', 'PA0194', 1, 2, 0, 6, 0 )
1859	ENDIF
1860
1861	!
1862	!-- Input binary data file is not needed anymore. This line must be placed
1863	!-- after call of user_init!
1864	CALL close_file( 13 )
1865
1866	!
1867	!-- Compute total sum of active mask grid points
1868	!-- ngp_2dh: number of grid points of a horizontal cross section through the
1869	!-- total domain
1870	!-- ngp_3d: number of grid points of the total domain
1871	ngp_2dh_outer_l = 0
1872	ngp_2dh_outer = 0
1873	ngp_2dh_s_inner_l = 0
1874	ngp_2dh_s_inner = 0
1875	ngp_2dh_l = 0
1876	ngp_2dh = 0
1877	ngp_3d_inner_l = 0.0_wp
1878	ngp_3d_inner = 0
1879	ngp_3d = 0
1880	ngp_sums = ( nz + 2 ) * ( pr_palm + max_pr_user )
1881
1882	DO sr = 0, statistic_regions
1883	DO i = nxl, nxr
1884	DO j = nys, nyn
1885	IF ( rmask(j,i,sr) == 1.0_wp ) THEN
1886	!
1887	!-- All xy-grid points
1888	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
1889	!
1890	!-- xy-grid points above topography
1891	DO k = nzb_s_outer(j,i), nz + 1
1892	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
1893	ENDDO
1894	DO k = nzb_s_inner(j,i), nz + 1
1895	ngp_2dh_s_inner_l(k,sr) = ngp_2dh_s_inner_l(k,sr) + 1
1896	ENDDO
1897	!
1898	!-- All grid points of the total domain above topography
1899	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
1900	( nz - nzb_s_inner(j,i) + 2 )
1901	ENDIF
1902	ENDDO
1903	ENDDO
1904	ENDDO
1905
1906	sr = statistic_regions + 1
1907	#if defined( __parallel )
1908	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1909	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
1910	comm2d, ierr )
1911	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1912	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
1913	MPI_INTEGER, MPI_SUM, comm2d, ierr )
1914	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1915	CALL MPI_ALLREDUCE( ngp_2dh_s_inner_l(0,0), ngp_2dh_s_inner(0,0), &
1916	(nz+2)*sr, MPI_INTEGER, MPI_SUM, comm2d, ierr )
1917	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1918	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner_tmp(0), sr, MPI_REAL, &
1919	MPI_SUM, comm2d, ierr )
1920	ngp_3d_inner = INT( ngp_3d_inner_tmp, KIND = SELECTED_INT_KIND( 18 ) )
1921	#else
1922	ngp_2dh = ngp_2dh_l
1923	ngp_2dh_outer = ngp_2dh_outer_l
1924	ngp_2dh_s_inner = ngp_2dh_s_inner_l
1925	ngp_3d_inner = INT( ngp_3d_inner_l, KIND = SELECTED_INT_KIND( 18 ) )
1926	#endif
1927
1928	ngp_3d = INT ( ngp_2dh, KIND = SELECTED_INT_KIND( 18 ) ) * &
1929	INT ( (nz + 2 ), KIND = SELECTED_INT_KIND( 18 ) )
1930
1931	!
1932	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
1933	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
1934	!-- the respective subdomain lie below the surface topography
1935	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
1936	ngp_3d_inner = MAX( INT(1, KIND = SELECTED_INT_KIND( 18 )), &
1937	ngp_3d_inner(:) )
1938	ngp_2dh_s_inner = MAX( 1, ngp_2dh_s_inner(:,:) )
1939
1940	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l, ngp_3d_inner_tmp )
1941
1942	CALL location_message( 'leaving init_3d_model', .TRUE. )
1943
1944	END SUBROUTINE init_3d_model

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