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source: palm/trunk/SOURCE/init_3d_model.f90 @ 1848

Last change on this file since 1848 was 1846, checked in by raasch, 9 years ago
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1	!> @file init_3d_model.f90
2	!--------------------------------------------------------------------------------!
3	! This file is part of PALM.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the terms
6	! of the GNU General Public License as published by the Free Software Foundation,
7	! either version 3 of the License, or (at your option) any later version.
8	!
9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12	!
13	! You should have received a copy of the GNU General Public License along with
14	! PALM. If not, see <http://www.gnu.org/licenses/>.
15	!
16	! Copyright 1997-2016 Leibniz Universitaet Hannover
17	!--------------------------------------------------------------------------------!
18	!
19	! Current revisions:
20	! ------------------
21	!
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: init_3d_model.f90 1846 2016-04-08 08:30:46Z witha $
26	!
27	! 1845 2016-04-08 08:29:13Z raasch
28	! nzb_2d replaced by nzb_u\|v_inner
29	!
30	! 1833 2016-04-07 14:23:03Z raasch
31	! initialization of spectra quantities moved to spectra_mod
32	!
33	! 1831 2016-04-07 13:15:51Z hoffmann
34	! turbulence renamed collision_turbulence
35	!
36	! 1826 2016-04-07 12:01:39Z maronga
37	! Renamed radiation calls.
38	! Renamed canopy model calls.
39	!
40	! 1822 2016-04-07 07:49:42Z hoffmann
41	! icloud_scheme replaced by microphysics_*
42	!
43	! 1817 2016-04-06 15:44:20Z maronga
44	! Renamed lsm calls.
45	!
46	! 1815 2016-04-06 13:49:59Z raasch
47	! zero-settings for velocities inside topography re-activated (was deactivated
48	! in r1762)
49	!
50	! 1788 2016-03-10 11:01:04Z maronga
51	! Added z0q.
52	! Syntax layout improved.
53	!
54	! 1783 2016-03-06 18:36:17Z raasch
55	! netcdf module name changed + related changes
56	!
57	! 1764 2016-02-28 12:45:19Z raasch
58	! bugfix: increase size of volume_flow_area_l and volume_flow_initial_l by 1
59	!
60	! 1762 2016-02-25 12:31:13Z hellstea
61	! Introduction of nested domain feature
62	!
63	! 1738 2015-12-18 13:56:05Z raasch
64	! calculate mean surface level height for each statistic region
65	!
66	! 1734 2015-12-02 12:17:12Z raasch
67	! no initial disturbances in case that the disturbance energy limit has been
68	! set zero
69	!
70	! 1707 2015-11-02 15:24:52Z maronga
71	! Bugfix: transfer of Richardson number from 1D model to Obukhov length caused
72	! devision by zero in neutral stratification
73	!
74	! 1691 2015-10-26 16:17:44Z maronga
75	! Call to init_surface_layer added. rif is replaced by ol and zeta.
76	!
77	! 1682 2015-10-07 23:56:08Z knoop
78	! Code annotations made doxygen readable
79	!
80	! 1615 2015-07-08 18:49:19Z suehring
81	! Enable turbulent inflow for passive_scalar and humidity
82	!
83	! 1585 2015-04-30 07:05:52Z maronga
84	! Initialization of radiation code is now done after LSM initializtion
85	!
86	! 1575 2015-03-27 09:56:27Z raasch
87	! adjustments for psolver-queries
88	!
89	! 1551 2015-03-03 14:18:16Z maronga
90	! Allocation of land surface arrays is now done in the subroutine lsm_init_arrays,
91	! which is part of land_surface_model.
92	!
93	! 1507 2014-12-10 12:14:18Z suehring
94	! Bugfix: set horizontal velocity components to zero inside topography
95	!
96	! 1496 2014-12-02 17:25:50Z maronga
97	! Added initialization of the land surface and radiation schemes
98	!
99	! 1484 2014-10-21 10:53:05Z kanani
100	! Changes due to new module structure of the plant canopy model:
101	! canopy-related initialization (e.g. lad and canopy_heat_flux) moved to new
102	! subroutine init_plant_canopy within the module plant_canopy_model_mod,
103	! call of subroutine init_plant_canopy added.
104	!
105	! 1431 2014-07-15 14:47:17Z suehring
106	! var_d added, in order to normalize spectra.
107	!
108	! 1429 2014-07-15 12:53:45Z knoop
109	! Ensemble run capability added to parallel random number generator
110	!
111	! 1411 2014-05-16 18:01:51Z suehring
112	! Initial horizontal velocity profiles were not set to zero at the first vertical
113	! grid level in case of non-cyclic lateral boundary conditions.
114	!
115	! 1406 2014-05-16 13:47:01Z raasch
116	! bugfix: setting of initial velocities at k=1 to zero not in case of a
117	! no-slip boundary condition for uv
118	!
119	! 1402 2014-05-09 14:25:13Z raasch
120	! location messages modified
121	!
122	! 1400 2014-05-09 14:03:54Z knoop
123	! Parallel random number generator added
124	!
125	! 1384 2014-05-02 14:31:06Z raasch
126	! location messages added
127	!
128	! 1361 2014-04-16 15:17:48Z hoffmann
129	! tend_* removed
130	! Bugfix: w_subs is not allocated anymore if it is already allocated
131	!
132	! 1359 2014-04-11 17:15:14Z hoffmann
133	! module lpm_init_mod added to use statements, because lpm_init has become a
134	! module
135	!
136	! 1353 2014-04-08 15:21:23Z heinze
137	! REAL constants provided with KIND-attribute
138	!
139	! 1340 2014-03-25 19:45:13Z kanani
140	! REAL constants defined as wp-kind
141	!
142	! 1322 2014-03-20 16:38:49Z raasch
143	! REAL constants defined as wp-kind
144	! module interfaces removed
145	!
146	! 1320 2014-03-20 08:40:49Z raasch
147	! ONLY-attribute added to USE-statements,
148	! kind-parameters added to all INTEGER and REAL declaration statements,
149	! kinds are defined in new module kinds,
150	! revision history before 2012 removed,
151	! comment fields (!:) to be used for variable explanations added to
152	! all variable declaration statements
153	!
154	! 1316 2014-03-17 07:44:59Z heinze
155	! Bugfix: allocation of w_subs
156	!
157	! 1299 2014-03-06 13:15:21Z heinze
158	! Allocate w_subs due to extension of large scale subsidence in combination
159	! with large scale forcing data (LSF_DATA)
160	!
161	! 1241 2013-10-30 11:36:58Z heinze
162	! Overwrite initial profiles in case of nudging
163	! Inititialize shf and qsws in case of large_scale_forcing
164	!
165	! 1221 2013-09-10 08:59:13Z raasch
166	! +rflags_s_inner in copyin statement, use copyin for most arrays instead of
167	! copy
168	!
169	! 1212 2013-08-15 08:46:27Z raasch
170	! array tri is allocated and included in data copy statement
171	!
172	! 1195 2013-07-01 12:27:57Z heinze
173	! Bugfix: move allocation of ref_state to parin.f90 and read_var_list.f90
174	!
175	! 1179 2013-06-14 05:57:58Z raasch
176	! allocate and set ref_state to be used in buoyancy terms
177	!
178	! 1171 2013-05-30 11:27:45Z raasch
179	! diss array is allocated with full size if accelerator boards are used
180	!
181	! 1159 2013-05-21 11:58:22Z fricke
182	! -bc_lr_dirneu, bc_lr_neudir, bc_ns_dirneu, bc_ns_neudir
183	!
184	! 1153 2013-05-10 14:33:08Z raasch
185	! diss array is allocated with dummy elements even if it is not needed
186	! (required by PGI 13.4 / CUDA 5.0)
187	!
188	! 1115 2013-03-26 18:16:16Z hoffmann
189	! unused variables removed
190	!
191	! 1113 2013-03-10 02:48:14Z raasch
192	! openACC directive modified
193	!
194	! 1111 2013-03-08 23:54:10Z raasch
195	! openACC directives added for pres
196	! array diss allocated only if required
197	!
198	! 1092 2013-02-02 11:24:22Z raasch
199	! unused variables removed
200	!
201	! 1065 2012-11-22 17:42:36Z hoffmann
202	! allocation of diss (dissipation rate) in case of turbulence = .TRUE. added
203	!
204	! 1053 2012-11-13 17:11:03Z hoffmann
205	! allocation and initialisation of necessary data arrays for the two-moment
206	! cloud physics scheme the two new prognostic equations (nr, qr):
207	! +dr, lambda_r, mu_r, sed_, xr, s, sws, swst, , _p, t_m, _1, _2, _3,
208	! +tend_*, prr
209	!
210	! 1036 2012-10-22 13:43:42Z raasch
211	! code put under GPL (PALM 3.9)
212	!
213	! 1032 2012-10-21 13:03:21Z letzel
214	! save memory by not allocating pt_2 in case of neutral = .T.
215	!
216	! 1025 2012-10-07 16:04:41Z letzel
217	! bugfix: swap indices of mask for ghost boundaries
218	!
219	! 1015 2012-09-27 09:23:24Z raasch
220	! mask is set to zero for ghost boundaries
221	!
222	! 1010 2012-09-20 07:59:54Z raasch
223	! cpp switch __nopointer added for pointer free version
224	!
225	! 1003 2012-09-14 14:35:53Z raasch
226	! nxra,nyna, nzta replaced ny nxr, nyn, nzt
227	!
228	! 1001 2012-09-13 14:08:46Z raasch
229	! all actions concerning leapfrog scheme removed
230	!
231	! 996 2012-09-07 10:41:47Z raasch
232	! little reformatting
233	!
234	! 978 2012-08-09 08:28:32Z fricke
235	! outflow damping layer removed
236	! roughness length for scalar quantites z0h added
237	! damping zone for the potential temperatur in case of non-cyclic lateral
238	! boundaries added
239	! initialization of ptdf_x, ptdf_y
240	! initialization of c_u_m, c_u_m_l, c_v_m, c_v_m_l, c_w_m, c_w_m_l
241	!
242	! 849 2012-03-15 10:35:09Z raasch
243	! init_particles renamed lpm_init
244	!
245	! 825 2012-02-19 03:03:44Z raasch
246	! wang_collision_kernel renamed wang_kernel
247	!
248	! Revision 1.1 1998/03/09 16:22:22 raasch
249	! Initial revision
250	!
251	!
252	! Description:
253	! ------------
254	!> Allocation of arrays and initialization of the 3D model via
255	!> a) pre-run the 1D model
256	!> or
257	!> b) pre-set constant linear profiles
258	!> or
259	!> c) read values of a previous run
260	!------------------------------------------------------------------------------!
261	SUBROUTINE init_3d_model
262
263
264	USE advec_ws
265
266	USE arrays_3d
267
268	USE cloud_parameters, &
269	ONLY: collision_turbulence, nc_const, precipitation_amount, &
270	precipitation_rate, prr
271
272	USE constants, &
273	ONLY: pi
274
275	USE control_parameters
276
277	USE grid_variables, &
278	ONLY: dx, dy
279
280	USE indices
281
282	USE lpm_init_mod, &
283	ONLY: lpm_init
284
285	USE kinds
286
287	USE land_surface_model_mod, &
288	ONLY: lsm_init, lsm_init_arrays, land_surface
289
290	USE ls_forcing_mod
291
292	USE model_1d, &
293	ONLY: e1d, kh1d, km1d, l1d, rif1d, u1d, us1d, usws1d, v1d, vsws1d
294
295	USE netcdf_interface, &
296	ONLY: dots_max, dots_num
297
298	USE particle_attributes, &
299	ONLY: particle_advection, use_sgs_for_particles, wang_kernel
300
301	USE pegrid
302
303	USE plant_canopy_model_mod, &
304	ONLY: pcm_init, plant_canopy
305
306	USE radiation_model_mod, &
307	ONLY: radiation_init, radiation
308
309	USE random_function_mod
310
311	USE random_generator_parallel, &
312	ONLY: random_number_parallel, random_seed_parallel, random_dummy, &
313	id_random_array, seq_random_array
314
315	USE statistics, &
316	ONLY: hom, hom_sum, mean_surface_level_height, pr_palm, rmask, &
317	statistic_regions, sums, sums_divnew_l, sums_divold_l, sums_l, &
318	sums_l_l, sums_up_fraction_l, sums_wsts_bc_l, ts_value, &
319	weight_pres, weight_substep
320
321	USE surface_layer_fluxes_mod, &
322	ONLY: init_surface_layer_fluxes
323
324	USE transpose_indices
325
326	IMPLICIT NONE
327
328	INTEGER(iwp) :: i !<
329	INTEGER(iwp) :: ind_array(1) !<
330	INTEGER(iwp) :: j !<
331	INTEGER(iwp) :: k !<
332	INTEGER(iwp) :: sr !<
333
334	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ngp_2dh_l !<
335
336	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l !<
337	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_s_inner_l !<
338
339	REAL(wp), DIMENSION(1:3) :: volume_flow_area_l !<
340	REAL(wp), DIMENSION(1:3) :: volume_flow_initial_l !<
341
342	REAL(wp), DIMENSION(:), ALLOCATABLE :: mean_surface_level_height_l !<
343	REAL(wp), DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_l !<
344	REAL(wp), DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_tmp !<
345
346
347	CALL location_message( 'allocating arrays', .FALSE. )
348	!
349	!-- Allocate arrays
350	ALLOCATE( mean_surface_level_height(0:statistic_regions), &
351	mean_surface_level_height_l(0:statistic_regions), &
352	ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
353	ngp_3d(0:statistic_regions), &
354	ngp_3d_inner(0:statistic_regions), &
355	ngp_3d_inner_l(0:statistic_regions), &
356	ngp_3d_inner_tmp(0:statistic_regions), &
357	sums_divnew_l(0:statistic_regions), &
358	sums_divold_l(0:statistic_regions) )
359	ALLOCATE( dp_smooth_factor(nzb:nzt), rdf(nzb+1:nzt), rdf_sc(nzb+1:nzt) )
360	ALLOCATE( ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
361	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
362	ngp_2dh_s_inner(nzb:nzt+1,0:statistic_regions), &
363	ngp_2dh_s_inner_l(nzb:nzt+1,0:statistic_regions), &
364	rmask(nysg:nyng,nxlg:nxrg,0:statistic_regions), &
365	sums(nzb:nzt+1,pr_palm+max_pr_user), &
366	sums_l(nzb:nzt+1,pr_palm+max_pr_user,0:threads_per_task-1), &
367	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
368	sums_up_fraction_l(10,3,0:statistic_regions), &
369	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions), &
370	ts_value(dots_max,0:statistic_regions) )
371	ALLOCATE( ptdf_x(nxlg:nxrg), ptdf_y(nysg:nyng) )
372
373	ALLOCATE( ol(nysg:nyng,nxlg:nxrg), shf(nysg:nyng,nxlg:nxrg), &
374	ts(nysg:nyng,nxlg:nxrg), tswst(nysg:nyng,nxlg:nxrg), &
375	us(nysg:nyng,nxlg:nxrg), usws(nysg:nyng,nxlg:nxrg), &
376	uswst(nysg:nyng,nxlg:nxrg), vsws(nysg:nyng,nxlg:nxrg), &
377	vswst(nysg:nyng,nxlg:nxrg), z0(nysg:nyng,nxlg:nxrg), &
378	z0h(nysg:nyng,nxlg:nxrg), z0q(nysg:nyng,nxlg:nxrg) )
379
380	ALLOCATE( d(nzb+1:nzt,nys:nyn,nxl:nxr), &
381	kh(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
382	km(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
383	p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
384	tend(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
385
386	#if defined( __nopointer )
387	ALLOCATE( e(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
388	e_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
389	pt(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
390	pt_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
391	u(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
392	u_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
393	v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
394	v_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
395	w(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
396	w_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
397	te_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
398	tpt_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
399	tu_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
400	tv_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
401	tw_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
402	#else
403	ALLOCATE( e_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
404	e_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
405	e_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
406	pt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
407	pt_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
408	u_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
409	u_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
410	u_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
411	v_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
412	v_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
413	v_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
414	w_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
415	w_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
416	w_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
417	IF ( .NOT. neutral ) THEN
418	ALLOCATE( pt_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
419	ENDIF
420	#endif
421
422	!
423	!-- Following array is required for perturbation pressure within the iterative
424	!-- pressure solvers. For the multistep schemes (Runge-Kutta), array p holds
425	!-- the weighted average of the substeps and cannot be used in the Poisson
426	!-- solver.
427	IF ( psolver == 'sor' ) THEN
428	ALLOCATE( p_loc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
429	ELSEIF ( psolver(1:9) == 'multigrid' ) THEN
430	!
431	!-- For performance reasons, multigrid is using one ghost layer only
432	ALLOCATE( p_loc(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
433	ENDIF
434
435	!
436	!-- Array for storing constant coeffficients of the tridiagonal solver
437	IF ( psolver == 'poisfft' ) THEN
438	ALLOCATE( tri(nxl_z:nxr_z,nys_z:nyn_z,0:nz-1,2) )
439	ALLOCATE( tric(nxl_z:nxr_z,nys_z:nyn_z,0:nz-1) )
440	ENDIF
441
442	IF ( humidity .OR. passive_scalar ) THEN
443	!
444	!-- 2D-humidity/scalar arrays
445	ALLOCATE ( qs(nysg:nyng,nxlg:nxrg), &
446	qsws(nysg:nyng,nxlg:nxrg), &
447	qswst(nysg:nyng,nxlg:nxrg) )
448
449	!
450	!-- 3D-humidity/scalar arrays
451	#if defined( __nopointer )
452	ALLOCATE( q(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
453	q_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
454	tq_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
455	#else
456	ALLOCATE( q_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
457	q_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
458	q_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
459	#endif
460
461	!
462	!-- 3D-arrays needed for humidity only
463	IF ( humidity ) THEN
464	#if defined( __nopointer )
465	ALLOCATE( vpt(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
466	#else
467	ALLOCATE( vpt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
468	#endif
469
470	IF ( cloud_physics ) THEN
471
472	!
473	!-- Liquid water content
474	#if defined( __nopointer )
475	ALLOCATE ( ql(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
476	#else
477	ALLOCATE ( ql_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
478	#endif
479	!
480	!-- Precipitation amount and rate (only needed if output is switched)
481	ALLOCATE( precipitation_amount(nysg:nyng,nxlg:nxrg), &
482	precipitation_rate(nysg:nyng,nxlg:nxrg) )
483
484	!
485	!-- 1D-arrays
486	ALLOCATE ( nc_1d(nzb:nzt+1), pt_1d(nzb:nzt+1), &
487	q_1d(nzb:nzt+1), qc_1d(nzb:nzt+1) )
488	!
489	!-- 3D-cloud water content
490	#if defined( __nopointer )
491	ALLOCATE( qc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
492	#else
493	ALLOCATE( qc_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
494	#endif
495	!
496	!-- 3d-precipitation rate
497	ALLOCATE( prr(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
498
499	IF ( microphysics_seifert ) THEN
500	!
501	!-- 1D-arrays
502	ALLOCATE ( nr_1d(nzb:nzt+1), qr_1d(nzb:nzt+1) )
503
504	!
505	!-- 2D-rain water content and rain drop concentration arrays
506	ALLOCATE ( qrs(nysg:nyng,nxlg:nxrg), &
507	qrsws(nysg:nyng,nxlg:nxrg), &
508	qrswst(nysg:nyng,nxlg:nxrg), &
509	nrs(nysg:nyng,nxlg:nxrg), &
510	nrsws(nysg:nyng,nxlg:nxrg), &
511	nrswst(nysg:nyng,nxlg:nxrg) )
512	!
513	!-- 3D-rain water content, rain drop concentration arrays
514	#if defined( __nopointer )
515	ALLOCATE( nr(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
516	nr_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
517	qr(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
518	qr_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
519	tnr_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
520	tqr_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
521	#else
522	ALLOCATE( nr_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
523	nr_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
524	nr_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
525	qr_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
526	qr_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
527	qr_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
528	#endif
529	ENDIF
530
531	ENDIF
532
533	IF ( cloud_droplets ) THEN
534	!
535	!-- Liquid water content, change in liquid water content
536	#if defined( __nopointer )
537	ALLOCATE ( ql(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
538	ql_c(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
539	#else
540	ALLOCATE ( ql_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
541	ql_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
542	#endif
543	!
544	!-- Real volume of particles (with weighting), volume of particles
545	ALLOCATE ( ql_v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
546	ql_vp(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
547	ENDIF
548
549	ENDIF
550
551	ENDIF
552
553	IF ( ocean ) THEN
554	ALLOCATE( saswsb(nysg:nyng,nxlg:nxrg), &
555	saswst(nysg:nyng,nxlg:nxrg) )
556	#if defined( __nopointer )
557	ALLOCATE( prho(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
558	rho(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
559	sa(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
560	sa_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
561	tsa_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
562	#else
563	ALLOCATE( prho_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
564	rho_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
565	sa_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
566	sa_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
567	sa_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
568	prho => prho_1
569	rho => rho_1 ! routines calc_mean_profile and diffusion_e require
570	! density to be apointer
571	#endif
572	IF ( humidity_remote ) THEN
573	ALLOCATE( qswst_remote(nysg:nyng,nxlg:nxrg))
574	qswst_remote = 0.0_wp
575	ENDIF
576	ENDIF
577
578	!
579	!-- 3D-array for storing the dissipation, needed for calculating the sgs
580	!-- particle velocities
581	IF ( use_sgs_for_particles .OR. wang_kernel .OR. collision_turbulence &
582	.OR. num_acc_per_node > 0 ) THEN
583	ALLOCATE( diss(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
584	ENDIF
585
586	!
587	!-- 1D-array for large scale subsidence velocity
588	IF ( .NOT. ALLOCATED( w_subs ) ) THEN
589	ALLOCATE ( w_subs(nzb:nzt+1) )
590	w_subs = 0.0_wp
591	ENDIF
592
593	!
594	!-- ID-array and state-space-array for the parallel random number generator
595	IF ( random_generator == 'random-parallel' ) THEN
596	ALLOCATE ( seq_random_array(5,nysg:nyng,nxlg:nxrg) )
597	ALLOCATE ( id_random_array(0:ny,0:nx) )
598	seq_random_array = 0
599	id_random_array = 0
600	ENDIF
601
602	!
603	!-- 4D-array for storing the Rif-values at vertical walls
604	IF ( topography /= 'flat' ) THEN
605	ALLOCATE( rif_wall(nzb:nzt+1,nysg:nyng,nxlg:nxrg,1:4) )
606	rif_wall = 0.0_wp
607	ENDIF
608
609	!
610	!-- Arrays to store velocity data from t-dt and the phase speeds which
611	!-- are needed for radiation boundary conditions
612	IF ( outflow_l ) THEN
613	ALLOCATE( u_m_l(nzb:nzt+1,nysg:nyng,1:2), &
614	v_m_l(nzb:nzt+1,nysg:nyng,0:1), &
615	w_m_l(nzb:nzt+1,nysg:nyng,0:1) )
616	ENDIF
617	IF ( outflow_r ) THEN
618	ALLOCATE( u_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx), &
619	v_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx), &
620	w_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx) )
621	ENDIF
622	IF ( outflow_l .OR. outflow_r ) THEN
623	ALLOCATE( c_u(nzb:nzt+1,nysg:nyng), c_v(nzb:nzt+1,nysg:nyng), &
624	c_w(nzb:nzt+1,nysg:nyng) )
625	ENDIF
626	IF ( outflow_s ) THEN
627	ALLOCATE( u_m_s(nzb:nzt+1,0:1,nxlg:nxrg), &
628	v_m_s(nzb:nzt+1,1:2,nxlg:nxrg), &
629	w_m_s(nzb:nzt+1,0:1,nxlg:nxrg) )
630	ENDIF
631	IF ( outflow_n ) THEN
632	ALLOCATE( u_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg), &
633	v_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg), &
634	w_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg) )
635	ENDIF
636	IF ( outflow_s .OR. outflow_n ) THEN
637	ALLOCATE( c_u(nzb:nzt+1,nxlg:nxrg), c_v(nzb:nzt+1,nxlg:nxrg), &
638	c_w(nzb:nzt+1,nxlg:nxrg) )
639	ENDIF
640	IF ( outflow_l .OR. outflow_r .OR. outflow_s .OR. outflow_n ) THEN
641	ALLOCATE( c_u_m_l(nzb:nzt+1), c_v_m_l(nzb:nzt+1), c_w_m_l(nzb:nzt+1) )
642	ALLOCATE( c_u_m(nzb:nzt+1), c_v_m(nzb:nzt+1), c_w_m(nzb:nzt+1) )
643	ENDIF
644
645
646	#if ! defined( __nopointer )
647	!
648	!-- Initial assignment of the pointers
649	e => e_1; e_p => e_2; te_m => e_3
650	IF ( .NOT. neutral ) THEN
651	pt => pt_1; pt_p => pt_2; tpt_m => pt_3
652	ELSE
653	pt => pt_1; pt_p => pt_1; tpt_m => pt_3
654	ENDIF
655	u => u_1; u_p => u_2; tu_m => u_3
656	v => v_1; v_p => v_2; tv_m => v_3
657	w => w_1; w_p => w_2; tw_m => w_3
658
659	IF ( humidity .OR. passive_scalar ) THEN
660	q => q_1; q_p => q_2; tq_m => q_3
661	IF ( humidity ) THEN
662	vpt => vpt_1
663	IF ( cloud_physics ) THEN
664	ql => ql_1
665	qc => qc_1
666	IF ( microphysics_seifert ) THEN
667	qr => qr_1; qr_p => qr_2; tqr_m => qr_3
668	nr => nr_1; nr_p => nr_2; tnr_m => nr_3
669	ENDIF
670	ENDIF
671	ENDIF
672	IF ( cloud_droplets ) THEN
673	ql => ql_1
674	ql_c => ql_2
675	ENDIF
676	ENDIF
677
678	IF ( ocean ) THEN
679	sa => sa_1; sa_p => sa_2; tsa_m => sa_3
680	ENDIF
681	#endif
682
683	!
684	!-- Allocate land surface model arrays
685	IF ( land_surface ) THEN
686	CALL lsm_init_arrays
687	ENDIF
688
689	!
690	!-- Allocate arrays containing the RK coefficient for calculation of
691	!-- perturbation pressure and turbulent fluxes. At this point values are
692	!-- set for pressure calculation during initialization (where no timestep
693	!-- is done). Further below the values needed within the timestep scheme
694	!-- will be set.
695	!-- TO_DO: zeroth element added to weight_pres because in case of nesting
696	!-- pres may need to be called outside the RK-substeps. Antti will
697	!-- check if this is really required.
698	ALLOCATE( weight_substep(1:intermediate_timestep_count_max), &
699	weight_pres(0:intermediate_timestep_count_max) )
700	weight_substep = 1.0_wp
701	weight_pres = 1.0_wp
702	intermediate_timestep_count = 1 ! needed when simulated_time = 0.0
703
704	CALL location_message( 'finished', .TRUE. )
705	!
706	!-- Initialize model variables
707	IF ( TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
708	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
709	!
710	!-- First model run of a possible job queue.
711	!-- Initial profiles of the variables must be computes.
712	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
713
714	CALL location_message( 'initializing with 1D model profiles', .FALSE. )
715	!
716	!-- Use solutions of the 1D model as initial profiles,
717	!-- start 1D model
718	CALL init_1d_model
719	!
720	!-- Transfer initial profiles to the arrays of the 3D model
721	DO i = nxlg, nxrg
722	DO j = nysg, nyng
723	e(:,j,i) = e1d
724	kh(:,j,i) = kh1d
725	km(:,j,i) = km1d
726	pt(:,j,i) = pt_init
727	u(:,j,i) = u1d
728	v(:,j,i) = v1d
729	ENDDO
730	ENDDO
731
732	IF ( humidity .OR. passive_scalar ) THEN
733	DO i = nxlg, nxrg
734	DO j = nysg, nyng
735	q(:,j,i) = q_init
736	ENDDO
737	ENDDO
738	IF ( cloud_physics .AND. microphysics_seifert ) THEN
739	DO i = nxlg, nxrg
740	DO j = nysg, nyng
741	qr(:,j,i) = 0.0_wp
742	nr(:,j,i) = 0.0_wp
743	ENDDO
744	ENDDO
745	!
746	!-- Initialze nc_1d with default value
747	nc_1d(:) = nc_const
748
749	ENDIF
750	ENDIF
751
752	IF ( .NOT. constant_diffusion ) THEN
753	DO i = nxlg, nxrg
754	DO j = nysg, nyng
755	e(:,j,i) = e1d
756	ENDDO
757	ENDDO
758	!
759	!-- Store initial profiles for output purposes etc.
760	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
761
762	IF ( constant_flux_layer ) THEN
763	ol = ( zu(nzb+1) - zw(nzb) ) / ( rif1d(nzb+1) + 1.0E-20_wp )
764	ts = 0.0_wp ! could actually be computed more accurately in the
765	! 1D model. Update when opportunity arises.
766	us = us1d
767	usws = usws1d
768	vsws = vsws1d
769	ELSE
770	ts = 0.0_wp ! must be set, because used in
771	ol = ( zu(nzb+1) - zw(nzb) ) / zeta_min ! flowste
772	us = 0.0_wp
773	usws = 0.0_wp
774	vsws = 0.0_wp
775	ENDIF
776
777	ELSE
778	e = 0.0_wp ! must be set, because used in
779	ol = ( zu(nzb+1) - zw(nzb) ) / zeta_min ! flowste
780	ts = 0.0_wp
781	us = 0.0_wp
782	usws = 0.0_wp
783	vsws = 0.0_wp
784	ENDIF
785	uswst = top_momentumflux_u
786	vswst = top_momentumflux_v
787
788	!
789	!-- In every case qs = 0.0 (see also pt)
790	!-- This could actually be computed more accurately in the 1D model.
791	!-- Update when opportunity arises!
792	IF ( humidity .OR. passive_scalar ) THEN
793	qs = 0.0_wp
794	IF ( cloud_physics .AND. microphysics_seifert ) THEN
795	qrs = 0.0_wp
796	nrs = 0.0_wp
797	ENDIF
798	ENDIF
799
800	!
801	!-- Inside buildings set velocities back to zero
802	IF ( topography /= 'flat' ) THEN
803	DO i = nxlg, nxrg
804	DO j = nysg, nyng
805	u(nzb:nzb_u_inner(j,i),j,i) = 0.0_wp
806	v(nzb:nzb_v_inner(j,i),j,i) = 0.0_wp
807	ENDDO
808	ENDDO
809
810	!
811	!-- WARNING: The extra boundary conditions set after running the
812	!-- ------- 1D model impose an error on the divergence one layer
813	!-- below the topography; need to correct later
814	!-- ATTENTION: Provisional correction for Piacsek & Williams
815	!-- --------- advection scheme: keep u and v zero one layer below
816	!-- the topography.
817	IF ( ibc_uv_b == 1 ) THEN
818	!
819	!-- Neumann condition
820	DO i = nxl-1, nxr+1
821	DO j = nys-1, nyn+1
822	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
823	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
824	ENDDO
825	ENDDO
826
827	ENDIF
828
829	ENDIF
830
831	CALL location_message( 'finished', .TRUE. )
832
833	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
834	THEN
835
836	CALL location_message( 'initializing with constant profiles', .FALSE. )
837	!
838	!-- Overwrite initial profiles in case of nudging
839	IF ( nudging ) THEN
840	pt_init = ptnudge(:,1)
841	u_init = unudge(:,1)
842	v_init = vnudge(:,1)
843	IF ( humidity .OR. passive_scalar ) THEN
844	q_init = qnudge(:,1)
845	ENDIF
846
847	WRITE( message_string, * ) 'Initial profiles of u, v and ', &
848	'scalars from NUDGING_DATA are used.'
849	CALL message( 'init_3d_model', 'PA0370', 0, 0, 0, 6, 0 )
850	ENDIF
851
852	!
853	!-- Use constructed initial profiles (velocity constant with height,
854	!-- temperature profile with constant gradient)
855	DO i = nxlg, nxrg
856	DO j = nysg, nyng
857	pt(:,j,i) = pt_init
858	u(:,j,i) = u_init
859	v(:,j,i) = v_init
860	ENDDO
861	ENDDO
862
863	!
864	!-- Set initial horizontal velocities at the lowest computational grid
865	!-- levels to zero in order to avoid too small time steps caused by the
866	!-- diffusion limit in the initial phase of a run (at k=1, dz/2 occurs
867	!-- in the limiting formula!).
868	IF ( ibc_uv_b /= 1 ) THEN
869	DO i = nxlg, nxrg
870	DO j = nysg, nyng
871	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0_wp
872	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0_wp
873	ENDDO
874	ENDDO
875	ENDIF
876
877	IF ( humidity .OR. passive_scalar ) THEN
878	DO i = nxlg, nxrg
879	DO j = nysg, nyng
880	q(:,j,i) = q_init
881	ENDDO
882	ENDDO
883	IF ( cloud_physics .AND. microphysics_seifert ) THEN
884	!
885	!-- Initialze nc_1d with default value
886	nc_1d(:) = nc_const
887
888	DO i = nxlg, nxrg
889	DO j = nysg, nyng
890	qr(:,j,i) = 0.0_wp
891	nr(:,j,i) = 0.0_wp
892	ENDDO
893	ENDDO
894
895	ENDIF
896	ENDIF
897
898	IF ( ocean ) THEN
899	DO i = nxlg, nxrg
900	DO j = nysg, nyng
901	sa(:,j,i) = sa_init
902	ENDDO
903	ENDDO
904	ENDIF
905
906	IF ( constant_diffusion ) THEN
907	km = km_constant
908	kh = km / prandtl_number
909	e = 0.0_wp
910	ELSEIF ( e_init > 0.0_wp ) THEN
911	DO k = nzb+1, nzt
912	km(k,:,:) = 0.1_wp * l_grid(k) * SQRT( e_init )
913	ENDDO
914	km(nzb,:,:) = km(nzb+1,:,:)
915	km(nzt+1,:,:) = km(nzt,:,:)
916	kh = km / prandtl_number
917	e = e_init
918	ELSE
919	IF ( .NOT. ocean ) THEN
920	kh = 0.01_wp ! there must exist an initial diffusion, because
921	km = 0.01_wp ! otherwise no TKE would be produced by the
922	! production terms, as long as not yet
923	! e = (u/cm)*2 at k=nzb+1
924	ELSE
925	kh = 0.00001_wp
926	km = 0.00001_wp
927	ENDIF
928	e = 0.0_wp
929	ENDIF
930	ol = ( zu(nzb+1) - zw(nzb) ) / zeta_min
931	ts = 0.0_wp
932	us = 0.0_wp
933	usws = 0.0_wp
934	uswst = top_momentumflux_u
935	vsws = 0.0_wp
936	vswst = top_momentumflux_v
937	IF ( humidity .OR. passive_scalar ) qs = 0.0_wp
938
939	!
940	!-- Compute initial temperature field and other constants used in case
941	!-- of a sloping surface
942	IF ( sloping_surface ) CALL init_slope
943
944	CALL location_message( 'finished', .TRUE. )
945
946	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
947	THEN
948
949	CALL location_message( 'initializing by user', .FALSE. )
950	!
951	!-- Initialization will completely be done by the user
952	CALL user_init_3d_model
953
954	CALL location_message( 'finished', .TRUE. )
955
956	ENDIF
957
958	CALL location_message( 'initializing statistics, boundary conditions, etc.', &
959	.FALSE. )
960
961	!
962	!-- Bottom boundary
963	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2 ) THEN
964	u(nzb,:,:) = 0.0_wp
965	v(nzb,:,:) = 0.0_wp
966	ENDIF
967
968	!
969	!-- Apply channel flow boundary condition
970	IF ( TRIM( bc_uv_t ) == 'dirichlet_0' ) THEN
971	u(nzt+1,:,:) = 0.0_wp
972	v(nzt+1,:,:) = 0.0_wp
973	ENDIF
974
975	!
976	!-- Calculate virtual potential temperature
977	IF ( humidity ) vpt = pt * ( 1.0_wp + 0.61_wp * q )
978
979	!
980	!-- Store initial profiles for output purposes etc.
981	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
982	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
983	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2) THEN
984	hom(nzb,1,5,:) = 0.0_wp
985	hom(nzb,1,6,:) = 0.0_wp
986	ENDIF
987	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
988	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
989	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
990
991	IF ( ocean ) THEN
992	!
993	!-- Store initial salinity profile
994	hom(:,1,26,:) = SPREAD( sa(:,nys,nxl), 2, statistic_regions+1 )
995	ENDIF
996
997	IF ( humidity ) THEN
998	!
999	!-- Store initial profile of total water content, virtual potential
1000	!-- temperature
1001	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
1002	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
1003	IF ( cloud_physics .OR. cloud_droplets ) THEN
1004	!
1005	!-- Store initial profile of specific humidity and potential
1006	!-- temperature
1007	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
1008	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
1009	ENDIF
1010	ENDIF
1011
1012	IF ( passive_scalar ) THEN
1013	!
1014	!-- Store initial scalar profile
1015	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
1016	ENDIF
1017
1018	!
1019	!-- Initialize the random number generators (from numerical recipes)
1020	CALL random_function_ini
1021
1022	IF ( random_generator == 'random-parallel' ) THEN
1023	!-- Asigning an ID to every vertical gridpoint column
1024	!-- dependig on the ensemble run number.
1025	random_dummy=1
1026	DO j=0,ny
1027	DO i=0,nx
1028	id_random_array(j,i) = random_dummy + 1E6 &
1029	* ( ensemble_member_nr - 1000 )
1030	random_dummy = random_dummy + 1
1031	END DO
1032	ENDDO
1033	!-- Initializing with random_seed_parallel for every vertical
1034	!-- gridpoint column.
1035	random_dummy=0
1036	DO j = nysg, nyng
1037	DO i = nxlg, nxrg
1038	CALL random_seed_parallel (random_sequence=id_random_array(j, i))
1039	CALL random_number_parallel (random_dummy)
1040	CALL random_seed_parallel (get=seq_random_array(:, j, i))
1041	END DO
1042	ENDDO
1043	ENDIF
1044
1045	!
1046	!-- Initialize fluxes at bottom surface
1047	IF ( use_surface_fluxes ) THEN
1048
1049	IF ( constant_heatflux ) THEN
1050	!
1051	!-- Heat flux is prescribed
1052	IF ( random_heatflux ) THEN
1053	CALL disturb_heatflux
1054	ELSE
1055	shf = surface_heatflux
1056	!
1057	!-- Initialize shf with data from external file LSF_DATA
1058	IF ( large_scale_forcing .AND. lsf_surf ) THEN
1059	CALL ls_forcing_surf ( simulated_time )
1060	ENDIF
1061
1062	!
1063	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
1064	IF ( TRIM( topography ) /= 'flat' ) THEN
1065	DO i = nxlg, nxrg
1066	DO j = nysg, nyng
1067	IF ( nzb_s_inner(j,i) /= 0 ) THEN
1068	shf(j,i) = wall_heatflux(0)
1069	ENDIF
1070	ENDDO
1071	ENDDO
1072	ENDIF
1073	ENDIF
1074	ENDIF
1075
1076	!
1077	!-- Determine the near-surface water flux
1078	IF ( humidity .OR. passive_scalar ) THEN
1079	IF ( cloud_physics .AND. microphysics_seifert ) THEN
1080	qrsws = 0.0_wp
1081	nrsws = 0.0_wp
1082	ENDIF
1083	IF ( constant_waterflux ) THEN
1084	qsws = surface_waterflux
1085	!
1086	!-- Over topography surface_waterflux is replaced by
1087	!-- wall_humidityflux(0)
1088	IF ( TRIM( topography ) /= 'flat' ) THEN
1089	wall_qflux = wall_humidityflux
1090	DO i = nxlg, nxrg
1091	DO j = nysg, nyng
1092	IF ( nzb_s_inner(j,i) /= 0 ) THEN
1093	qsws(j,i) = wall_qflux(0)
1094	ENDIF
1095	ENDDO
1096	ENDDO
1097	ENDIF
1098	ENDIF
1099	ENDIF
1100
1101	ENDIF
1102
1103	!
1104	!-- Initialize fluxes at top surface
1105	!-- Currently, only the heatflux and salinity flux can be prescribed.
1106	!-- The latent flux is zero in this case!
1107	IF ( use_top_fluxes ) THEN
1108
1109	IF ( constant_top_heatflux ) THEN
1110	!
1111	!-- Heat flux is prescribed
1112	tswst = top_heatflux
1113
1114	IF ( humidity .OR. passive_scalar ) THEN
1115	qswst = 0.0_wp
1116	IF ( cloud_physics .AND. microphysics_seifert ) THEN
1117	nrswst = 0.0_wp
1118	qrswst = 0.0_wp
1119	ENDIF
1120	ENDIF
1121
1122	IF ( ocean ) THEN
1123	saswsb = bottom_salinityflux
1124	saswst = top_salinityflux
1125	ENDIF
1126	ENDIF
1127
1128	!
1129	!-- Initialization in case of a coupled model run
1130	IF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
1131	tswst = 0.0_wp
1132	ENDIF
1133
1134	ENDIF
1135
1136	!
1137	!-- Initialize Prandtl layer quantities
1138	IF ( constant_flux_layer ) THEN
1139
1140	z0 = roughness_length
1141	z0h = z0h_factor * z0
1142	z0q = z0h_factor * z0
1143
1144	IF ( .NOT. constant_heatflux ) THEN
1145	!
1146	!-- Surface temperature is prescribed. Here the heat flux cannot be
1147	!-- simply estimated, because therefore ol, u* and theta* would have
1148	!-- to be computed by iteration. This is why the heat flux is assumed
1149	!-- to be zero before the first time step. It approaches its correct
1150	!-- value in the course of the first few time steps.
1151	shf = 0.0_wp
1152	ENDIF
1153
1154	IF ( humidity .OR. passive_scalar ) THEN
1155	IF ( .NOT. constant_waterflux ) qsws = 0.0_wp
1156	IF ( cloud_physics .AND. microphysics_seifert ) THEN
1157	qrsws = 0.0_wp
1158	nrsws = 0.0_wp
1159	ENDIF
1160	ENDIF
1161
1162	ENDIF
1163
1164	!
1165	!-- Set the reference state to be used in the buoyancy terms (for ocean runs
1166	!-- the reference state will be set (overwritten) in init_ocean)
1167	IF ( use_single_reference_value ) THEN
1168	IF ( .NOT. humidity ) THEN
1169	ref_state(:) = pt_reference
1170	ELSE
1171	ref_state(:) = vpt_reference
1172	ENDIF
1173	ELSE
1174	IF ( .NOT. humidity ) THEN
1175	ref_state(:) = pt_init(:)
1176	ELSE
1177	ref_state(:) = vpt(:,nys,nxl)
1178	ENDIF
1179	ENDIF
1180
1181	!
1182	!-- For the moment, vertical velocity is zero
1183	w = 0.0_wp
1184
1185	!
1186	!-- Initialize array sums (must be defined in first call of pres)
1187	sums = 0.0_wp
1188
1189	!
1190	!-- In case of iterative solvers, p must get an initial value
1191	IF ( psolver(1:9) == 'multigrid' .OR. psolver == 'sor' ) p = 0.0_wp
1192
1193	!
1194	!-- Treating cloud physics, liquid water content and precipitation amount
1195	!-- are zero at beginning of the simulation
1196	IF ( cloud_physics ) THEN
1197	ql = 0.0_wp
1198	qc = 0.0_wp
1199
1200	precipitation_amount = 0.0_wp
1201
1202	IF ( microphysics_seifert ) THEN
1203	nc_1d = nc_const
1204	ENDIF
1205	ENDIF
1206	!
1207	!-- Impose vortex with vertical axis on the initial velocity profile
1208	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
1209	CALL init_rankine
1210	ENDIF
1211
1212	!
1213	!-- Impose temperature anomaly (advection test only)
1214	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
1215	CALL init_pt_anomaly
1216	ENDIF
1217
1218	!
1219	!-- If required, change the surface temperature at the start of the 3D run
1220	IF ( pt_surface_initial_change /= 0.0_wp ) THEN
1221	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
1222	ENDIF
1223
1224	!
1225	!-- If required, change the surface humidity/scalar at the start of the 3D
1226	!-- run
1227	IF ( ( humidity .OR. passive_scalar ) .AND. &
1228	q_surface_initial_change /= 0.0_wp ) THEN
1229	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
1230	ENDIF
1231
1232	!
1233	!-- Initialize old and new time levels.
1234	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
1235	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
1236
1237	IF ( humidity .OR. passive_scalar ) THEN
1238	tq_m = 0.0_wp
1239	q_p = q
1240	IF ( cloud_physics .AND. microphysics_seifert ) THEN
1241	tqr_m = 0.0_wp
1242	qr_p = qr
1243	tnr_m = 0.0_wp
1244	nr_p = nr
1245	ENDIF
1246	ENDIF
1247
1248	IF ( ocean ) THEN
1249	tsa_m = 0.0_wp
1250	sa_p = sa
1251	ENDIF
1252
1253	CALL location_message( 'finished', .TRUE. )
1254
1255	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' .OR. &
1256	TRIM( initializing_actions ) == 'cyclic_fill' ) &
1257	THEN
1258
1259	CALL location_message( 'initializing in case of restart / cyclic_fill', &
1260	.FALSE. )
1261	!
1262	!-- When reading data for cyclic fill of 3D prerun data files, read
1263	!-- some of the global variables from the restart file which are required
1264	!-- for initializing the inflow
1265	IF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1266
1267	DO i = 0, io_blocks-1
1268	IF ( i == io_group ) THEN
1269	CALL read_parts_of_var_list
1270	CALL close_file( 13 )
1271	ENDIF
1272	#if defined( __parallel )
1273	CALL MPI_BARRIER( comm2d, ierr )
1274	#endif
1275	ENDDO
1276
1277	ENDIF
1278
1279	!
1280	!-- Read binary data from restart file
1281	DO i = 0, io_blocks-1
1282	IF ( i == io_group ) THEN
1283	CALL read_3d_binary
1284	ENDIF
1285	#if defined( __parallel )
1286	CALL MPI_BARRIER( comm2d, ierr )
1287	#endif
1288	ENDDO
1289
1290	!
1291	!-- Initialization of the turbulence recycling method
1292	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. &
1293	turbulent_inflow ) THEN
1294	!
1295	!-- First store the profiles to be used at the inflow.
1296	!-- These profiles are the (temporally) and horizontally averaged vertical
1297	!-- profiles from the prerun. Alternatively, prescribed profiles
1298	!-- for u,v-components can be used.
1299	ALLOCATE( mean_inflow_profiles(nzb:nzt+1,6) )
1300
1301	IF ( use_prescribed_profile_data ) THEN
1302	mean_inflow_profiles(:,1) = u_init ! u
1303	mean_inflow_profiles(:,2) = v_init ! v
1304	ELSE
1305	mean_inflow_profiles(:,1) = hom_sum(:,1,0) ! u
1306	mean_inflow_profiles(:,2) = hom_sum(:,2,0) ! v
1307	ENDIF
1308	mean_inflow_profiles(:,4) = hom_sum(:,4,0) ! pt
1309	mean_inflow_profiles(:,5) = hom_sum(:,8,0) ! e
1310	mean_inflow_profiles(:,6) = hom_sum(:,41,0) ! q
1311
1312	!
1313	!-- If necessary, adjust the horizontal flow field to the prescribed
1314	!-- profiles
1315	IF ( use_prescribed_profile_data ) THEN
1316	DO i = nxlg, nxrg
1317	DO j = nysg, nyng
1318	DO k = nzb, nzt+1
1319	u(k,j,i) = u(k,j,i) - hom_sum(k,1,0) + u_init(k)
1320	v(k,j,i) = v(k,j,i) - hom_sum(k,2,0) + v_init(k)
1321	ENDDO
1322	ENDDO
1323	ENDDO
1324	ENDIF
1325
1326	!
1327	!-- Use these mean profiles at the inflow (provided that Dirichlet
1328	!-- conditions are used)
1329	IF ( inflow_l ) THEN
1330	DO j = nysg, nyng
1331	DO k = nzb, nzt+1
1332	u(k,j,nxlg:-1) = mean_inflow_profiles(k,1)
1333	v(k,j,nxlg:-1) = mean_inflow_profiles(k,2)
1334	w(k,j,nxlg:-1) = 0.0_wp
1335	pt(k,j,nxlg:-1) = mean_inflow_profiles(k,4)
1336	e(k,j,nxlg:-1) = mean_inflow_profiles(k,5)
1337	IF ( humidity .OR. passive_scalar ) &
1338	q(k,j,nxlg:-1) = mean_inflow_profiles(k,6)
1339	ENDDO
1340	ENDDO
1341	ENDIF
1342
1343	!
1344	!-- Calculate the damping factors to be used at the inflow. For a
1345	!-- turbulent inflow the turbulent fluctuations have to be limited
1346	!-- vertically because otherwise the turbulent inflow layer will grow
1347	!-- in time.
1348	IF ( inflow_damping_height == 9999999.9_wp ) THEN
1349	!
1350	!-- Default: use the inversion height calculated by the prerun; if
1351	!-- this is zero, inflow_damping_height must be explicitly
1352	!-- specified.
1353	IF ( hom_sum(nzb+6,pr_palm,0) /= 0.0_wp ) THEN
1354	inflow_damping_height = hom_sum(nzb+6,pr_palm,0)
1355	ELSE
1356	WRITE( message_string, * ) 'inflow_damping_height must be ', &
1357	'explicitly specified because&the inversion height ', &
1358	'calculated by the prerun is zero.'
1359	CALL message( 'init_3d_model', 'PA0318', 1, 2, 0, 6, 0 )
1360	ENDIF
1361
1362	ENDIF
1363
1364	IF ( inflow_damping_width == 9999999.9_wp ) THEN
1365	!
1366	!-- Default for the transition range: one tenth of the undamped
1367	!-- layer
1368	inflow_damping_width = 0.1_wp * inflow_damping_height
1369
1370	ENDIF
1371
1372	ALLOCATE( inflow_damping_factor(nzb:nzt+1) )
1373
1374	DO k = nzb, nzt+1
1375
1376	IF ( zu(k) <= inflow_damping_height ) THEN
1377	inflow_damping_factor(k) = 1.0_wp
1378	ELSEIF ( zu(k) <= ( inflow_damping_height + inflow_damping_width ) ) THEN
1379	inflow_damping_factor(k) = 1.0_wp - &
1380	( zu(k) - inflow_damping_height ) / &
1381	inflow_damping_width
1382	ELSE
1383	inflow_damping_factor(k) = 0.0_wp
1384	ENDIF
1385
1386	ENDDO
1387
1388	ENDIF
1389
1390	!
1391	!-- Inside buildings set velocities and TKE back to zero
1392	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. &
1393	topography /= 'flat' ) THEN
1394	!
1395	!-- Inside buildings set velocities and TKE back to zero.
1396	!-- Other scalars (pt, q, s, km, kh, p, sa, ...) are ignored at present,
1397	!-- maybe revise later.
1398	DO i = nxlg, nxrg
1399	DO j = nysg, nyng
1400	u (nzb:nzb_u_inner(j,i),j,i) = 0.0_wp
1401	v (nzb:nzb_v_inner(j,i),j,i) = 0.0_wp
1402	w (nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1403	e (nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1404	tu_m(nzb:nzb_u_inner(j,i),j,i) = 0.0_wp
1405	tv_m(nzb:nzb_v_inner(j,i),j,i) = 0.0_wp
1406	tw_m(nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1407	te_m(nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1408	tpt_m(nzb:nzb_w_inner(j,i),j,i) = 0.0_wp
1409	ENDDO
1410	ENDDO
1411
1412	ENDIF
1413
1414	!
1415	!-- Calculate initial temperature field and other constants used in case
1416	!-- of a sloping surface
1417	IF ( sloping_surface ) CALL init_slope
1418
1419	!
1420	!-- Initialize new time levels (only done in order to set boundary values
1421	!-- including ghost points)
1422	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
1423	IF ( humidity .OR. passive_scalar ) THEN
1424	q_p = q
1425	IF ( cloud_physics .AND. microphysics_seifert ) THEN
1426	qr_p = qr
1427	nr_p = nr
1428	ENDIF
1429	ENDIF
1430	IF ( ocean ) sa_p = sa
1431
1432	!
1433	!-- Allthough tendency arrays are set in prognostic_equations, they have
1434	!-- have to be predefined here because they are used (but multiplied with 0)
1435	!-- there before they are set.
1436	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
1437	IF ( humidity .OR. passive_scalar ) THEN
1438	tq_m = 0.0_wp
1439	IF ( cloud_physics .AND. microphysics_seifert ) THEN
1440	tqr_m = 0.0_wp
1441	tnr_m = 0.0_wp
1442	ENDIF
1443	ENDIF
1444	IF ( ocean ) tsa_m = 0.0_wp
1445
1446	CALL location_message( 'finished', .TRUE. )
1447
1448	ELSE
1449	!
1450	!-- Actually this part of the programm should not be reached
1451	message_string = 'unknown initializing problem'
1452	CALL message( 'init_3d_model', 'PA0193', 1, 2, 0, 6, 0 )
1453	ENDIF
1454
1455
1456	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1457	!
1458	!-- Initialize old timelevels needed for radiation boundary conditions
1459	IF ( outflow_l ) THEN
1460	u_m_l(:,:,:) = u(:,:,1:2)
1461	v_m_l(:,:,:) = v(:,:,0:1)
1462	w_m_l(:,:,:) = w(:,:,0:1)
1463	ENDIF
1464	IF ( outflow_r ) THEN
1465	u_m_r(:,:,:) = u(:,:,nx-1:nx)
1466	v_m_r(:,:,:) = v(:,:,nx-1:nx)
1467	w_m_r(:,:,:) = w(:,:,nx-1:nx)
1468	ENDIF
1469	IF ( outflow_s ) THEN
1470	u_m_s(:,:,:) = u(:,0:1,:)
1471	v_m_s(:,:,:) = v(:,1:2,:)
1472	w_m_s(:,:,:) = w(:,0:1,:)
1473	ENDIF
1474	IF ( outflow_n ) THEN
1475	u_m_n(:,:,:) = u(:,ny-1:ny,:)
1476	v_m_n(:,:,:) = v(:,ny-1:ny,:)
1477	w_m_n(:,:,:) = w(:,ny-1:ny,:)
1478	ENDIF
1479
1480	ENDIF
1481
1482	!
1483	!-- Calculate the initial volume flow at the right and north boundary
1484	IF ( conserve_volume_flow ) THEN
1485
1486	IF ( use_prescribed_profile_data ) THEN
1487
1488	volume_flow_initial_l = 0.0_wp
1489	volume_flow_area_l = 0.0_wp
1490
1491	IF ( nxr == nx ) THEN
1492	DO j = nys, nyn
1493	DO k = nzb_u_inner(j,nx)+1, nzt
1494	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1495	u_init(k) * dzw(k)
1496	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1497	ENDDO
1498	ENDDO
1499	ENDIF
1500
1501	IF ( nyn == ny ) THEN
1502	DO i = nxl, nxr
1503	DO k = nzb_v_inner(ny,i)+1, nzt
1504	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1505	v_init(k) * dzw(k)
1506	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1507	ENDDO
1508	ENDDO
1509	ENDIF
1510
1511	#if defined( __parallel )
1512	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1513	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1514	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1515	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1516
1517	#else
1518	volume_flow_initial = volume_flow_initial_l
1519	volume_flow_area = volume_flow_area_l
1520	#endif
1521
1522	ELSEIF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1523
1524	volume_flow_initial_l = 0.0_wp
1525	volume_flow_area_l = 0.0_wp
1526
1527	IF ( nxr == nx ) THEN
1528	DO j = nys, nyn
1529	DO k = nzb_u_inner(j,nx)+1, nzt
1530	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1531	hom_sum(k,1,0) * dzw(k)
1532	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1533	ENDDO
1534	ENDDO
1535	ENDIF
1536
1537	IF ( nyn == ny ) THEN
1538	DO i = nxl, nxr
1539	DO k = nzb_v_inner(ny,i)+1, nzt
1540	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1541	hom_sum(k,2,0) * dzw(k)
1542	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1543	ENDDO
1544	ENDDO
1545	ENDIF
1546
1547	#if defined( __parallel )
1548	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1549	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1550	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1551	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1552
1553	#else
1554	volume_flow_initial = volume_flow_initial_l
1555	volume_flow_area = volume_flow_area_l
1556	#endif
1557
1558	ELSEIF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1559
1560	volume_flow_initial_l = 0.0_wp
1561	volume_flow_area_l = 0.0_wp
1562
1563	IF ( nxr == nx ) THEN
1564	DO j = nys, nyn
1565	DO k = nzb_u_inner(j,nx)+1, nzt
1566	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1567	u(k,j,nx) * dzw(k)
1568	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1569	ENDDO
1570	ENDDO
1571	ENDIF
1572
1573	IF ( nyn == ny ) THEN
1574	DO i = nxl, nxr
1575	DO k = nzb_v_inner(ny,i)+1, nzt
1576	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1577	v(k,ny,i) * dzw(k)
1578	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1579	ENDDO
1580	ENDDO
1581	ENDIF
1582
1583	#if defined( __parallel )
1584	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1585	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1586	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1587	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1588
1589	#else
1590	volume_flow_initial = volume_flow_initial_l
1591	volume_flow_area = volume_flow_area_l
1592	#endif
1593
1594	ENDIF
1595
1596	!
1597	!-- In case of 'bulk_velocity' mode, volume_flow_initial is calculated
1598	!-- from u\|v_bulk instead
1599	IF ( TRIM( conserve_volume_flow_mode ) == 'bulk_velocity' ) THEN
1600	volume_flow_initial(1) = u_bulk * volume_flow_area(1)
1601	volume_flow_initial(2) = v_bulk * volume_flow_area(2)
1602	ENDIF
1603
1604	ENDIF
1605
1606	!
1607	!-- Initialize quantities for special advections schemes
1608	CALL init_advec
1609
1610	!
1611	!-- Impose random perturbation on the horizontal velocity field and then
1612	!-- remove the divergences from the velocity field at the initial stage
1613	IF ( create_disturbances .AND. disturbance_energy_limit /= 0.0_wp .AND. &
1614	TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
1615	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
1616
1617	CALL location_message( 'creating initial disturbances', .FALSE. )
1618	CALL disturb_field( nzb_u_inner, tend, u )
1619	CALL disturb_field( nzb_v_inner, tend, v )
1620	CALL location_message( 'finished', .TRUE. )
1621
1622	CALL location_message( 'calling pressure solver', .FALSE. )
1623	n_sor = nsor_ini
1624	!$acc data copyin( d, ddzu, ddzw, nzb_s_inner, nzb_u_inner ) &
1625	!$acc copyin( nzb_v_inner, nzb_w_inner, p, rflags_s_inner, tend ) &
1626	!$acc copyin( weight_pres, weight_substep ) &
1627	!$acc copy( tri, tric, u, v, w )
1628	CALL pres
1629	!$acc end data
1630	n_sor = nsor
1631	CALL location_message( 'finished', .TRUE. )
1632
1633	ENDIF
1634
1635	!
1636	!-- If required, initialize quantities needed for the plant canopy model
1637	CALL location_message( 'initializing plant canopy model', .FALSE. )
1638	IF ( plant_canopy ) CALL pcm_init
1639	CALL location_message( 'finished', .TRUE. )
1640
1641	!
1642	!-- If required, initialize dvrp-software
1643	IF ( dt_dvrp /= 9999999.9_wp ) CALL init_dvrp
1644
1645	IF ( ocean ) THEN
1646	!
1647	!-- Initialize quantities needed for the ocean model
1648	CALL init_ocean
1649
1650	ELSE
1651	!
1652	!-- Initialize quantities for handling cloud physics
1653	!-- This routine must be called before lpm_init, because
1654	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
1655	!-- lpm_init) is not defined.
1656	CALL init_cloud_physics
1657	ENDIF
1658
1659	!
1660	!-- If required, initialize particles
1661	IF ( particle_advection ) CALL lpm_init
1662
1663	!
1664	!-- If required, initialize quantities needed for the LSM
1665	IF ( land_surface ) THEN
1666	CALL location_message( 'initializing land surface model', .FALSE. )
1667	CALL lsm_init
1668	CALL location_message( 'finished', .TRUE. )
1669	ENDIF
1670
1671	!
1672	!-- Initialize surface layer (done after LSM as roughness length are required
1673	!-- for initialization
1674	IF ( constant_flux_layer ) THEN
1675	CALL location_message( 'initializing surface layer', .FALSE. )
1676	CALL init_surface_layer_fluxes
1677	CALL location_message( 'finished', .TRUE. )
1678	ENDIF
1679
1680	!
1681	!-- If required, initialize radiation model
1682	IF ( radiation ) THEN
1683	CALL location_message( 'initializing radiation model', .FALSE. )
1684	CALL radiation_init
1685	CALL location_message( 'finished', .TRUE. )
1686	ENDIF
1687
1688	!
1689	!-- Initialize the ws-scheme.
1690	IF ( ws_scheme_sca .OR. ws_scheme_mom ) CALL ws_init
1691
1692	!
1693	!-- Setting weighting factors for calculation of perturbation pressure
1694	!-- and turbulent quantities from the RK substeps
1695	!-- TO_DO: zeroth element is added to weight_pres because in nesting pres
1696	!-- may need to be called outside the RK-substeps
1697	weight_pres(0) = 1.0_wp
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	!-- and the mean surface level height for each statistic region
1855	!-- ngp_2dh: number of grid points of a horizontal cross section through the
1856	!-- total domain
1857	!-- ngp_3d: number of grid points of the total domain
1858	ngp_2dh_outer_l = 0
1859	ngp_2dh_outer = 0
1860	ngp_2dh_s_inner_l = 0
1861	ngp_2dh_s_inner = 0
1862	ngp_2dh_l = 0
1863	ngp_2dh = 0
1864	ngp_3d_inner_l = 0.0_wp
1865	ngp_3d_inner = 0
1866	ngp_3d = 0
1867	ngp_sums = ( nz + 2 ) * ( pr_palm + max_pr_user )
1868
1869	mean_surface_level_height = 0.0_wp
1870	mean_surface_level_height_l = 0.0_wp
1871
1872	DO sr = 0, statistic_regions
1873	DO i = nxl, nxr
1874	DO j = nys, nyn
1875	IF ( rmask(j,i,sr) == 1.0_wp ) THEN
1876	!
1877	!-- All xy-grid points
1878	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
1879	mean_surface_level_height_l(sr) = mean_surface_level_height_l(sr) &
1880	+ zw(nzb_s_inner(j,i))
1881	!
1882	!-- xy-grid points above topography
1883	DO k = nzb_s_outer(j,i), nz + 1
1884	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
1885	ENDDO
1886	DO k = nzb_s_inner(j,i), nz + 1
1887	ngp_2dh_s_inner_l(k,sr) = ngp_2dh_s_inner_l(k,sr) + 1
1888	ENDDO
1889	!
1890	!-- All grid points of the total domain above topography
1891	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) &
1892	+ ( nz - nzb_s_inner(j,i) + 2 )
1893	ENDIF
1894	ENDDO
1895	ENDDO
1896	ENDDO
1897
1898	sr = statistic_regions + 1
1899	#if defined( __parallel )
1900	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1901	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
1902	comm2d, ierr )
1903	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1904	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
1905	MPI_INTEGER, MPI_SUM, comm2d, ierr )
1906	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1907	CALL MPI_ALLREDUCE( ngp_2dh_s_inner_l(0,0), ngp_2dh_s_inner(0,0), &
1908	(nz+2)*sr, MPI_INTEGER, MPI_SUM, comm2d, ierr )
1909	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1910	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner_tmp(0), sr, MPI_REAL, &
1911	MPI_SUM, comm2d, ierr )
1912	ngp_3d_inner = INT( ngp_3d_inner_tmp, KIND = SELECTED_INT_KIND( 18 ) )
1913	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1914	CALL MPI_ALLREDUCE( mean_surface_level_height_l(0), &
1915	mean_surface_level_height(0), sr, MPI_REAL, &
1916	MPI_SUM, comm2d, ierr )
1917	mean_surface_level_height = mean_surface_level_height / REAL( ngp_2dh )
1918	#else
1919	ngp_2dh = ngp_2dh_l
1920	ngp_2dh_outer = ngp_2dh_outer_l
1921	ngp_2dh_s_inner = ngp_2dh_s_inner_l
1922	ngp_3d_inner = INT( ngp_3d_inner_l, KIND = SELECTED_INT_KIND( 18 ) )
1923	mean_surface_level_height = mean_surface_level_height_l / REAL( ngp_2dh_l )
1924	#endif
1925
1926	ngp_3d = INT ( ngp_2dh, KIND = SELECTED_INT_KIND( 18 ) ) * &
1927	INT ( (nz + 2 ), KIND = SELECTED_INT_KIND( 18 ) )
1928
1929	!
1930	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
1931	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
1932	!-- the respective subdomain lie below the surface topography
1933	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
1934	ngp_3d_inner = MAX( INT(1, KIND = SELECTED_INT_KIND( 18 )), &
1935	ngp_3d_inner(:) )
1936	ngp_2dh_s_inner = MAX( 1, ngp_2dh_s_inner(:,:) )
1937
1938	DEALLOCATE( mean_surface_level_height_l, ngp_2dh_l, ngp_2dh_outer_l, &
1939	ngp_3d_inner_l, ngp_3d_inner_tmp )
1940
1941	CALL location_message( 'leaving init_3d_model', .TRUE. )
1942
1943	END SUBROUTINE init_3d_model

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