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source: palm/tags/release-3.10/SOURCE/init_3d_model.f90 @ 1296

Last change on this file since 1296 was 1242, checked in by heinze, 10 years ago
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1	#if defined( __ibmy_special )
2	@PROCESS NOOPTimize
3	#endif
4	SUBROUTINE init_3d_model
5
6	!--------------------------------------------------------------------------------!
7	! This file is part of PALM.
8	!
9	! PALM is free software: you can redistribute it and/or modify it under the terms
10	! of the GNU General Public License as published by the Free Software Foundation,
11	! either version 3 of the License, or (at your option) any later version.
12	!
13	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
14	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
15	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16	!
17	! You should have received a copy of the GNU General Public License along with
18	! PALM. If not, see <http://www.gnu.org/licenses/>.
19	!
20	! Copyright 1997-2012 Leibniz University Hannover
21	!--------------------------------------------------------------------------------!
22	!
23	! Current revisions:
24	! ------------------
25	!
26	!
27	! Former revisions:
28	! -----------------
29	! $Id: init_3d_model.f90 1242 2013-10-30 11:50:11Z raasch $
30	!
31	! 1241 2013-10-30 11:36:58Z heinze
32	! Overwrite initial profiles in case of nudging
33	! Inititialize shf and qsws in case of large_scale_forcing
34	!
35	! 1221 2013-09-10 08:59:13Z raasch
36	! +rflags_s_inner in copyin statement, use copyin for most arrays instead of
37	! copy
38	!
39	! 1212 2013-08-15 08:46:27Z raasch
40	! array tri is allocated and included in data copy statement
41	!
42	! 1195 2013-07-01 12:27:57Z heinze
43	! Bugfix: move allocation of ref_state to parin.f90 and read_var_list.f90
44	!
45	! 1179 2013-06-14 05:57:58Z raasch
46	! allocate and set ref_state to be used in buoyancy terms
47	!
48	! 1171 2013-05-30 11:27:45Z raasch
49	! diss array is allocated with full size if accelerator boards are used
50	!
51	! 1159 2013-05-21 11:58:22Z fricke
52	! -bc_lr_dirneu, bc_lr_neudir, bc_ns_dirneu, bc_ns_neudir
53	!
54	! 1153 2013-05-10 14:33:08Z raasch
55	! diss array is allocated with dummy elements even if it is not needed
56	! (required by PGI 13.4 / CUDA 5.0)
57	!
58	! 1115 2013-03-26 18:16:16Z hoffmann
59	! unused variables removed
60	!
61	! 1113 2013-03-10 02:48:14Z raasch
62	! openACC directive modified
63	!
64	! 1111 2013-03-08 23:54:10Z raasch
65	! openACC directives added for pres
66	! array diss allocated only if required
67	!
68	! 1092 2013-02-02 11:24:22Z raasch
69	! unused variables removed
70	!
71	! 1065 2012-11-22 17:42:36Z hoffmann
72	! allocation of diss (dissipation rate) in case of turbulence = .TRUE. added
73	!
74	! 1053 2012-11-13 17:11:03Z hoffmann
75	! allocation and initialisation of necessary data arrays for the two-moment
76	! cloud physics scheme the two new prognostic equations (nr, qr):
77	! +dr, lambda_r, mu_r, sed_, xr, s, sws, swst, , _p, t_m, _1, _2, _3,
78	! +tend_*, prr
79	!
80	! 1036 2012-10-22 13:43:42Z raasch
81	! code put under GPL (PALM 3.9)
82	!
83	! 1032 2012-10-21 13:03:21Z letzel
84	! save memory by not allocating pt_2 in case of neutral = .T.
85	!
86	! 1025 2012-10-07 16:04:41Z letzel
87	! bugfix: swap indices of mask for ghost boundaries
88	!
89	! 1015 2012-09-27 09:23:24Z raasch
90	! mask is set to zero for ghost boundaries
91	!
92	! 1010 2012-09-20 07:59:54Z raasch
93	! cpp switch __nopointer added for pointer free version
94	!
95	! 1003 2012-09-14 14:35:53Z raasch
96	! nxra,nyna, nzta replaced ny nxr, nyn, nzt
97	!
98	! 1001 2012-09-13 14:08:46Z raasch
99	! all actions concerning leapfrog scheme removed
100	!
101	! 996 2012-09-07 10:41:47Z raasch
102	! little reformatting
103	!
104	! 978 2012-08-09 08:28:32Z fricke
105	! outflow damping layer removed
106	! roughness length for scalar quantites z0h added
107	! damping zone for the potential temperatur in case of non-cyclic lateral
108	! boundaries added
109	! initialization of ptdf_x, ptdf_y
110	! initialization of c_u_m, c_u_m_l, c_v_m, c_v_m_l, c_w_m, c_w_m_l
111	!
112	! 849 2012-03-15 10:35:09Z raasch
113	! init_particles renamed lpm_init
114	!
115	! 825 2012-02-19 03:03:44Z raasch
116	! wang_collision_kernel renamed wang_kernel
117	!
118	! 790 2011-11-29 03:11:20Z raasch
119	! diss is also allocated in case that the Wang kernel is used
120	!
121	! 787 2011-11-28 12:49:05Z heinze $
122	! bugfix: call init_advec in every case - not only for inital runs
123	!
124	! 785 2011-11-28 09:47:19Z raasch
125	! initialization of rdf_sc
126	!
127	! 767 2011-10-14 06:39:12Z raasch
128	! adjustments concerning implementation of prescribed u,v-profiles
129	! bugfix: dirichlet_0 conditions for ug/vg moved to check_parameters
130	!
131	! 759 2011-09-15 13:58:31Z raasch
132	! Splitting of parallel I/O in blocks of PEs
133	! Bugfix: No zero assignments to volume_flow_initial and volume_flow_area in
134	! case of normal restart runs.
135	!
136	! 713 2011-03-30 14:21:21Z suehring
137	! weight_substep and weight_pres are given as fractions.
138	!
139	! 709 2011-03-30 09:31:40Z raasch
140	! formatting adjustments
141	!
142	! 707 2011-03-29 11:39:40Z raasch
143	! p_sub renamed p_loc and allocated depending on the chosen pressure solver,
144	! initial assignments of zero to array p for iterative solvers only,
145	! bc_lr/ns replaced by bc_lr/ns_dirrad/raddir
146	!
147	! 680 2011-02-04 23:16:06Z gryschka
148	! bugfix: volume_flow_control
149	!
150	! 673 2011-01-18 16:19:48Z suehring
151	! weight_substep (moved from advec_ws) and weight_pres added.
152	! Allocate p_sub when using Multigrid or SOR solver.
153	! Call of ws_init moved behind the if requests.
154	!
155	! 667 2010-12-23 12:06:00Z suehring/gryschka
156	! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng in loops and
157	! allocation of arrays. Calls of exchange_horiz are modified.
158	! Call ws_init to initialize arrays needed for calculating statisticas and for
159	! optimization when ws-scheme is used.
160	! Initial volume flow is now calculated by using the variable hom_sum.
161	! Therefore the correction of initial volume flow for non-flat topography
162	! removed (removed u_nzb_p1_for_vfc and v_nzb_p1_for_vfc)
163	! Changed surface boundary conditions for u and v in case of ibc_uv_b == 0 from
164	! mirror to Dirichlet boundary conditions (u=v=0), so that k=nzb is
165	! representative for the height z0.
166	! Bugfix: type conversion of '1' to 64bit for the MAX function (ngp_3d_inner)
167	!
168	! 622 2010-12-10 08:08:13Z raasch
169	! optional barriers included in order to speed up collective operations
170	!
171	! 560 2010-09-09 10:06:09Z weinreis
172	! bugfix: correction of calculating ngp_3d for 64 bit
173	!
174	! 485 2010-02-05 10:57:51Z raasch
175	! calculation of ngp_3d + ngp_3d_inner changed because they have now 64 bit
176	!
177	! 407 2009-12-01 15:01:15Z maronga
178	! var_ts is replaced by dots_max
179	! Enabled passive scalar/humidity wall fluxes for non-flat topography
180	!
181	! 388 2009-09-23 09:40:33Z raasch
182	! Initialization of prho added.
183	! bugfix: correction of initial volume flow for non-flat topography
184	! bugfix: zero initialization of arrays within buildings for 'cyclic_fill'
185	! bugfix: avoid that ngp_2dh_s_inner becomes zero
186	! initializing_actions='read_data_for_recycling' renamed to 'cyclic_fill', now
187	! independent of turbulent_inflow
188	! Output of messages replaced by message handling routine.
189	! Set the starting level and the vertical smoothing factor used for
190	! the external pressure gradient
191	! +conserve_volume_flow_mode: 'default', 'initial_profiles', 'inflow_profile'
192	! and 'bulk_velocity'
193	! If the inversion height calculated by the prerun is zero,
194	! inflow_damping_height must be explicitly specified.
195	!
196	! 181 2008-07-30 07:07:47Z raasch
197	! bugfix: zero assignments to tendency arrays in case of restarts,
198	! further extensions and modifications in the initialisation of the plant
199	! canopy model,
200	! allocation of hom_sum moved to parin, initialization of spectrum_x\|y directly
201	! after allocating theses arrays,
202	! read data for recycling added as new initialization option,
203	! dummy allocation for diss
204	!
205	! 138 2007-11-28 10:03:58Z letzel
206	! New counter ngp_2dh_s_inner.
207	! Allow new case bc_uv_t = 'dirichlet_0' for channel flow.
208	! Corrected calculation of initial volume flow for 'set_1d-model_profiles' and
209	! 'set_constant_profiles' in case of buildings in the reference cross-sections.
210	!
211	! 108 2007-08-24 15:10:38Z letzel
212	! Flux initialization in case of coupled runs, +momentum fluxes at top boundary,
213	! +arrays for phase speed c_u, c_v, c_w, indices for u\|v\|w_m_l\|r changed
214	! +qswst_remote in case of atmosphere model with humidity coupled to ocean
215	! Rayleigh damping for ocean, optionally calculate km and kh from initial
216	! TKE e_init
217	!
218	! 97 2007-06-21 08:23:15Z raasch
219	! Initialization of salinity, call of init_ocean
220	!
221	! 87 2007-05-22 15:46:47Z raasch
222	! var_hom and var_sum renamed pr_palm
223	!
224	! 75 2007-03-22 09:54:05Z raasch
225	! Arrays for radiation boundary conditions are allocated (u_m_l, u_m_r, etc.),
226	! bugfix for cases with the outflow damping layer extending over more than one
227	! subdomain, moisture renamed humidity,
228	! new initializing action "by_user" calls user_init_3d_model,
229	! precipitation_amount/rate, ts_value are allocated, +module netcdf_control,
230	! initial velocities at nzb+1 are regarded for volume
231	! flow control in case they have been set zero before (to avoid small timesteps)
232	! -uvmean_outflow, uxrp, vynp eliminated
233	!
234	! 19 2007-02-23 04:53:48Z raasch
235	! +handling of top fluxes
236	!
237	! RCS Log replace by Id keyword, revision history cleaned up
238	!
239	! Revision 1.49 2006/08/22 15:59:07 raasch
240	! No optimization of this file on the ibmy (Yonsei Univ.)
241	!
242	! Revision 1.1 1998/03/09 16:22:22 raasch
243	! Initial revision
244	!
245	!
246	! Description:
247	! ------------
248	! Allocation of arrays and initialization of the 3D model via
249	! a) pre-run the 1D model
250	! or
251	! b) pre-set constant linear profiles
252	! or
253	! c) read values of a previous run
254	!------------------------------------------------------------------------------!
255
256	USE advec_ws
257	USE arrays_3d
258	USE averaging
259	USE cloud_parameters
260	USE constants
261	USE control_parameters
262	USE cpulog
263	USE grid_variables
264	USE indices
265	USE interfaces
266	USE ls_forcing_mod
267	USE model_1d
268	USE netcdf_control
269	USE particle_attributes
270	USE pegrid
271	USE profil_parameter
272	USE random_function_mod
273	USE statistics
274	USE transpose_indices
275
276	IMPLICIT NONE
277
278	INTEGER :: i, ind_array(1), j, k, sr
279
280	INTEGER, DIMENSION(:), ALLOCATABLE :: ngp_2dh_l
281
282	INTEGER, DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l, &
283	ngp_2dh_s_inner_l
284
285	REAL, DIMENSION(1:2) :: volume_flow_area_l, volume_flow_initial_l
286
287	REAL, DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_l, ngp_3d_inner_tmp
288
289
290	!
291	!-- Allocate arrays
292	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
293	ngp_3d(0:statistic_regions), &
294	ngp_3d_inner(0:statistic_regions), &
295	ngp_3d_inner_l(0:statistic_regions), &
296	ngp_3d_inner_tmp(0:statistic_regions), &
297	sums_divnew_l(0:statistic_regions), &
298	sums_divold_l(0:statistic_regions) )
299	ALLOCATE( dp_smooth_factor(nzb:nzt), rdf(nzb+1:nzt), rdf_sc(nzb+1:nzt) )
300	ALLOCATE( ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
301	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
302	ngp_2dh_s_inner(nzb:nzt+1,0:statistic_regions), &
303	ngp_2dh_s_inner_l(nzb:nzt+1,0:statistic_regions), &
304	rmask(nysg:nyng,nxlg:nxrg,0:statistic_regions), &
305	sums(nzb:nzt+1,pr_palm+max_pr_user), &
306	sums_l(nzb:nzt+1,pr_palm+max_pr_user,0:threads_per_task-1), &
307	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
308	sums_up_fraction_l(10,3,0:statistic_regions), &
309	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions), &
310	ts_value(dots_max,0:statistic_regions) )
311	ALLOCATE( ptdf_x(nxlg:nxrg), ptdf_y(nysg:nyng) )
312
313	ALLOCATE( rif(nysg:nyng,nxlg:nxrg), shf(nysg:nyng,nxlg:nxrg), &
314	ts(nysg:nyng,nxlg:nxrg), tswst(nysg:nyng,nxlg:nxrg), &
315	us(nysg:nyng,nxlg:nxrg), usws(nysg:nyng,nxlg:nxrg), &
316	uswst(nysg:nyng,nxlg:nxrg), vsws(nysg:nyng,nxlg:nxrg), &
317	vswst(nysg:nyng,nxlg:nxrg), z0(nysg:nyng,nxlg:nxrg), &
318	z0h(nysg:nyng,nxlg:nxrg) )
319
320	ALLOCATE( d(nzb+1:nzt,nys:nyn,nxl:nxr), &
321	kh(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
322	km(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
323	p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
324	tend(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
325
326	#if defined( __nopointer )
327	ALLOCATE( e(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
328	e_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
329	pt(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
330	pt_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
331	u(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
332	u_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
333	v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
334	v_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
335	w(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
336	w_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
337	te_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
338	tpt_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
339	tu_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
340	tv_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
341	tw_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
342	#else
343	ALLOCATE( e_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
344	e_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
345	e_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
346	pt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
347	pt_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
348	u_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
349	u_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
350	u_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
351	v_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
352	v_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
353	v_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
354	w_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
355	w_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
356	w_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
357	IF ( .NOT. neutral ) THEN
358	ALLOCATE( pt_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
359	ENDIF
360	#endif
361
362	!
363	!-- Following array is required for perturbation pressure within the iterative
364	!-- pressure solvers. For the multistep schemes (Runge-Kutta), array p holds
365	!-- the weighted average of the substeps and cannot be used in the Poisson
366	!-- solver.
367	IF ( psolver == 'sor' ) THEN
368	ALLOCATE( p_loc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
369	ELSEIF ( psolver == 'multigrid' ) THEN
370	!
371	!-- For performance reasons, multigrid is using one ghost layer only
372	ALLOCATE( p_loc(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
373	ENDIF
374
375	!
376	!-- Array for storing constant coeffficients of the tridiagonal solver
377	IF ( psolver == 'poisfft' ) THEN
378	ALLOCATE( tri(nxl_z:nxr_z,nys_z:nyn_z,0:nz-1,2) )
379	ALLOCATE( tric(nxl_z:nxr_z,nys_z:nyn_z,0:nz-1) )
380	ENDIF
381
382	IF ( humidity .OR. passive_scalar ) THEN
383	!
384	!-- 2D-humidity/scalar arrays
385	ALLOCATE ( qs(nysg:nyng,nxlg:nxrg), &
386	qsws(nysg:nyng,nxlg:nxrg), &
387	qswst(nysg:nyng,nxlg:nxrg) )
388
389	!
390	!-- 3D-humidity/scalar arrays
391	#if defined( __nopointer )
392	ALLOCATE( q(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
393	q_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
394	tq_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
395	#else
396	ALLOCATE( q_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
397	q_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
398	q_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
399	#endif
400
401	!
402	!-- 3D-arrays needed for humidity only
403	IF ( humidity ) THEN
404	#if defined( __nopointer )
405	ALLOCATE( vpt(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
406	#else
407	ALLOCATE( vpt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
408	#endif
409
410	IF ( cloud_physics ) THEN
411
412	!
413	!-- Liquid water content
414	#if defined( __nopointer )
415	ALLOCATE ( ql(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
416	#else
417	ALLOCATE ( ql_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
418	#endif
419	!
420	!-- Precipitation amount and rate (only needed if output is switched)
421	ALLOCATE( precipitation_amount(nysg:nyng,nxlg:nxrg), &
422	precipitation_rate(nysg:nyng,nxlg:nxrg) )
423
424	IF ( icloud_scheme == 0 ) THEN
425	!
426	!-- 1D-arrays
427	ALLOCATE ( nc_1d(nzb:nzt+1), pt_1d(nzb:nzt+1), &
428	q_1d(nzb:nzt+1), qc_1d(nzb:nzt+1) )
429	!
430	!-- 3D-cloud water content
431	#if defined( __nopointer )
432	ALLOCATE( qc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
433	#else
434	ALLOCATE( qc_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
435	#endif
436	!
437	!-- 3D-tendency arrays
438	ALLOCATE( tend_pt(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
439	tend_q(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
440
441	IF ( precipitation ) THEN
442	!
443	!-- 1D-arrays
444	ALLOCATE ( nr_1d(nzb:nzt+1), qr_1d(nzb:nzt+1) )
445	!
446	!
447	!-- 3D-tendency arrays
448	ALLOCATE( tend_nr(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
449	tend_qr(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
450	!
451	!-- 2D-rain water content and rain drop concentration arrays
452	ALLOCATE ( qrs(nysg:nyng,nxlg:nxrg), &
453	qrsws(nysg:nyng,nxlg:nxrg), &
454	qrswst(nysg:nyng,nxlg:nxrg), &
455	nrs(nysg:nyng,nxlg:nxrg), &
456	nrsws(nysg:nyng,nxlg:nxrg), &
457	nrswst(nysg:nyng,nxlg:nxrg) )
458	!
459	!-- 3D-rain water content, rain drop concentration arrays
460	#if defined( __nopointer )
461	ALLOCATE( nr(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
462	nr_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
463	qr(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
464	qr_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
465	tnr_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
466	tqr_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
467	#else
468	ALLOCATE( nr_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
469	nr_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
470	nr_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
471	qr_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
472	qr_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
473	qr_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
474	#endif
475	!
476	!-- 3d-precipitation rate
477	ALLOCATE( prr(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
478	ENDIF
479
480	ENDIF
481	ENDIF
482
483	IF ( cloud_droplets ) THEN
484	!
485	!-- Liquid water content, change in liquid water content
486	#if defined( __nopointer )
487	ALLOCATE ( ql(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
488	ql_c(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
489	#else
490	ALLOCATE ( ql_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
491	ql_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
492	#endif
493	!
494	!-- Real volume of particles (with weighting), volume of particles
495	ALLOCATE ( ql_v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
496	ql_vp(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
497	ENDIF
498
499	ENDIF
500
501	ENDIF
502
503	IF ( ocean ) THEN
504	ALLOCATE( saswsb(nysg:nyng,nxlg:nxrg), &
505	saswst(nysg:nyng,nxlg:nxrg) )
506	#if defined( __nopointer )
507	ALLOCATE( prho(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
508	rho(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
509	sa(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
510	sa_p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
511	tsa_m(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
512	#else
513	ALLOCATE( prho_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
514	rho_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
515	sa_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
516	sa_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
517	sa_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
518	prho => prho_1
519	rho => rho_1 ! routines calc_mean_profile and diffusion_e require
520	! density to be apointer
521	#endif
522	IF ( humidity_remote ) THEN
523	ALLOCATE( qswst_remote(nysg:nyng,nxlg:nxrg))
524	qswst_remote = 0.0
525	ENDIF
526	ENDIF
527
528	!
529	!-- 3D-array for storing the dissipation, needed for calculating the sgs
530	!-- particle velocities
531	IF ( use_sgs_for_particles .OR. wang_kernel .OR. turbulence .OR. &
532	num_acc_per_node > 0 ) THEN
533	ALLOCATE( diss(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
534	ENDIF
535
536	IF ( dt_dosp /= 9999999.9 ) THEN
537	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
538	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
539	spectrum_x = 0.0
540	spectrum_y = 0.0
541	ENDIF
542
543	!
544	!-- 3D-arrays for the leaf area density and the canopy drag coefficient
545	IF ( plant_canopy ) THEN
546	ALLOCATE ( lad_s(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
547	lad_u(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
548	lad_v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
549	lad_w(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
550	cdc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
551
552	IF ( passive_scalar ) THEN
553	ALLOCATE ( sls(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
554	sec(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
555	ENDIF
556
557	IF ( cthf /= 0.0 ) THEN
558	ALLOCATE ( lai(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
559	canopy_heat_flux(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
560	ENDIF
561
562	ENDIF
563
564	!
565	!-- 4D-array for storing the Rif-values at vertical walls
566	IF ( topography /= 'flat' ) THEN
567	ALLOCATE( rif_wall(nzb:nzt+1,nysg:nyng,nxlg:nxrg,1:4) )
568	rif_wall = 0.0
569	ENDIF
570
571	!
572	!-- Arrays to store velocity data from t-dt and the phase speeds which
573	!-- are needed for radiation boundary conditions
574	IF ( outflow_l ) THEN
575	ALLOCATE( u_m_l(nzb:nzt+1,nysg:nyng,1:2), &
576	v_m_l(nzb:nzt+1,nysg:nyng,0:1), &
577	w_m_l(nzb:nzt+1,nysg:nyng,0:1) )
578	ENDIF
579	IF ( outflow_r ) THEN
580	ALLOCATE( u_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx), &
581	v_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx), &
582	w_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx) )
583	ENDIF
584	IF ( outflow_l .OR. outflow_r ) THEN
585	ALLOCATE( c_u(nzb:nzt+1,nysg:nyng), c_v(nzb:nzt+1,nysg:nyng), &
586	c_w(nzb:nzt+1,nysg:nyng) )
587	ENDIF
588	IF ( outflow_s ) THEN
589	ALLOCATE( u_m_s(nzb:nzt+1,0:1,nxlg:nxrg), &
590	v_m_s(nzb:nzt+1,1:2,nxlg:nxrg), &
591	w_m_s(nzb:nzt+1,0:1,nxlg:nxrg) )
592	ENDIF
593	IF ( outflow_n ) THEN
594	ALLOCATE( u_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg), &
595	v_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg), &
596	w_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg) )
597	ENDIF
598	IF ( outflow_s .OR. outflow_n ) THEN
599	ALLOCATE( c_u(nzb:nzt+1,nxlg:nxrg), c_v(nzb:nzt+1,nxlg:nxrg), &
600	c_w(nzb:nzt+1,nxlg:nxrg) )
601	ENDIF
602	IF ( outflow_l .OR. outflow_r .OR. outflow_s .OR. outflow_n ) THEN
603	ALLOCATE( c_u_m_l(nzb:nzt+1), c_v_m_l(nzb:nzt+1), c_w_m_l(nzb:nzt+1) )
604	ALLOCATE( c_u_m(nzb:nzt+1), c_v_m(nzb:nzt+1), c_w_m(nzb:nzt+1) )
605	ENDIF
606
607
608	#if ! defined( __nopointer )
609	!
610	!-- Initial assignment of the pointers
611	e => e_1; e_p => e_2; te_m => e_3
612	IF ( .NOT. neutral ) THEN
613	pt => pt_1; pt_p => pt_2; tpt_m => pt_3
614	ELSE
615	pt => pt_1; pt_p => pt_1; tpt_m => pt_3
616	ENDIF
617	u => u_1; u_p => u_2; tu_m => u_3
618	v => v_1; v_p => v_2; tv_m => v_3
619	w => w_1; w_p => w_2; tw_m => w_3
620
621	IF ( humidity .OR. passive_scalar ) THEN
622	q => q_1; q_p => q_2; tq_m => q_3
623	IF ( humidity ) THEN
624	vpt => vpt_1
625	IF ( cloud_physics ) THEN
626	ql => ql_1
627	IF ( icloud_scheme == 0 ) THEN
628	qc => qc_1
629	IF ( precipitation ) THEN
630	qr => qr_1; qr_p => qr_2; tqr_m => qr_3
631	nr => nr_1; nr_p => nr_2; tnr_m => nr_3
632	ENDIF
633	ENDIF
634	ENDIF
635	ENDIF
636	IF ( cloud_droplets ) THEN
637	ql => ql_1
638	ql_c => ql_2
639	ENDIF
640	ENDIF
641
642	IF ( ocean ) THEN
643	sa => sa_1; sa_p => sa_2; tsa_m => sa_3
644	ENDIF
645	#endif
646
647	!
648	!-- Allocate arrays containing the RK coefficient for calculation of
649	!-- perturbation pressure and turbulent fluxes. At this point values are
650	!-- set for pressure calculation during initialization (where no timestep
651	!-- is done). Further below the values needed within the timestep scheme
652	!-- will be set.
653	ALLOCATE( weight_substep(1:intermediate_timestep_count_max), &
654	weight_pres(1:intermediate_timestep_count_max) )
655	weight_substep = 1.0
656	weight_pres = 1.0
657	intermediate_timestep_count = 1 ! needed when simulated_time = 0.0
658
659	!
660	!-- Initialize model variables
661	IF ( TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
662	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
663	!
664	!-- First model run of a possible job queue.
665	!-- Initial profiles of the variables must be computes.
666	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
667	!
668	!-- Use solutions of the 1D model as initial profiles,
669	!-- start 1D model
670	CALL init_1d_model
671	!
672	!-- Transfer initial profiles to the arrays of the 3D model
673	DO i = nxlg, nxrg
674	DO j = nysg, nyng
675	e(:,j,i) = e1d
676	kh(:,j,i) = kh1d
677	km(:,j,i) = km1d
678	pt(:,j,i) = pt_init
679	u(:,j,i) = u1d
680	v(:,j,i) = v1d
681	ENDDO
682	ENDDO
683
684	IF ( humidity .OR. passive_scalar ) THEN
685	DO i = nxlg, nxrg
686	DO j = nysg, nyng
687	q(:,j,i) = q_init
688	ENDDO
689	ENDDO
690	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
691	precipitation ) THEN
692	DO i = nxlg, nxrg
693	DO j = nysg, nyng
694	qr(:,j,i) = 0.0
695	nr(:,j,i) = 0.0
696	ENDDO
697	ENDDO
698	!
699	!-- Initialze nc_1d with default value
700	nc_1d(:) = nc_const
701
702	ENDIF
703	ENDIF
704
705	IF ( .NOT. constant_diffusion ) THEN
706	DO i = nxlg, nxrg
707	DO j = nysg, nyng
708	e(:,j,i) = e1d
709	ENDDO
710	ENDDO
711	!
712	!-- Store initial profiles for output purposes etc.
713	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
714
715	IF ( prandtl_layer ) THEN
716	rif = rif1d(nzb+1)
717	ts = 0.0 ! could actually be computed more accurately in the
718	! 1D model. Update when opportunity arises.
719	us = us1d
720	usws = usws1d
721	vsws = vsws1d
722	ELSE
723	ts = 0.0 ! must be set, because used in
724	rif = 0.0 ! flowste
725	us = 0.0
726	usws = 0.0
727	vsws = 0.0
728	ENDIF
729
730	ELSE
731	e = 0.0 ! must be set, because used in
732	rif = 0.0 ! flowste
733	ts = 0.0
734	us = 0.0
735	usws = 0.0
736	vsws = 0.0
737	ENDIF
738	uswst = top_momentumflux_u
739	vswst = top_momentumflux_v
740
741	!
742	!-- In every case qs = 0.0 (see also pt)
743	!-- This could actually be computed more accurately in the 1D model.
744	!-- Update when opportunity arises!
745	IF ( humidity .OR. passive_scalar ) THEN
746	qs = 0.0
747	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
748	precipitation ) THEN
749	qrs = 0.0
750	nrs = 0.0
751	ENDIF
752	ENDIF
753
754	!
755	!-- inside buildings set velocities back to zero
756	IF ( topography /= 'flat' ) THEN
757	DO i = nxl-1, nxr+1
758	DO j = nys-1, nyn+1
759	u(nzb:nzb_u_inner(j,i),j,i) = 0.0
760	v(nzb:nzb_v_inner(j,i),j,i) = 0.0
761	ENDDO
762	ENDDO
763
764	!
765	!-- WARNING: The extra boundary conditions set after running the
766	!-- ------- 1D model impose an error on the divergence one layer
767	!-- below the topography; need to correct later
768	!-- ATTENTION: Provisional correction for Piacsek & Williams
769	!-- --------- advection scheme: keep u and v zero one layer below
770	!-- the topography.
771	IF ( ibc_uv_b == 1 ) THEN
772	!
773	!-- Neumann condition
774	DO i = nxl-1, nxr+1
775	DO j = nys-1, nyn+1
776	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
777	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
778	ENDDO
779	ENDDO
780
781	ENDIF
782
783	ENDIF
784
785	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
786	THEN
787
788	!
789	!-- Overwrite initial profiles in case of nudging
790	IF ( nudging ) THEN
791	pt_init = ptnudge(:,1)
792	u_init = unudge(:,1)
793	v_init = vnudge(:,1)
794	IF ( humidity .OR. passive_scalar ) THEN
795	q_init = qnudge(:,1)
796	ENDIF
797
798	WRITE( message_string, * ) 'Initial profiles of u, v and ', &
799	'scalars from NUDGING_DATA are used.'
800	CALL message( 'init_3d_model', 'PA0370', 0, 0, 0, 6, 0 )
801	ENDIF
802
803	!
804	!-- Use constructed initial profiles (velocity constant with height,
805	!-- temperature profile with constant gradient)
806	DO i = nxlg, nxrg
807	DO j = nysg, nyng
808	pt(:,j,i) = pt_init
809	u(:,j,i) = u_init
810	v(:,j,i) = v_init
811	ENDDO
812	ENDDO
813
814	!
815	!-- Set initial horizontal velocities at the lowest computational grid
816	!-- levels to zero in order to avoid too small time steps caused by the
817	!-- diffusion limit in the initial phase of a run (at k=1, dz/2 occurs
818	!-- in the limiting formula!). The original values are stored to be later
819	!-- used for volume flow control.
820	DO i = nxlg, nxrg
821	DO j = nysg, nyng
822	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0
823	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0
824	ENDDO
825	ENDDO
826
827	IF ( humidity .OR. passive_scalar ) THEN
828	DO i = nxlg, nxrg
829	DO j = nysg, nyng
830	q(:,j,i) = q_init
831	ENDDO
832	ENDDO
833	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
834	!
835	!-- Initialze nc_1d with default value
836	nc_1d(:) = nc_const
837
838	IF ( precipitation ) THEN
839	DO i = nxlg, nxrg
840	DO j = nysg, nyng
841	qr(:,j,i) = 0.0
842	nr(:,j,i) = 0.0
843	ENDDO
844	ENDDO
845	ENDIF
846
847	ENDIF
848	ENDIF
849
850	IF ( ocean ) THEN
851	DO i = nxlg, nxrg
852	DO j = nysg, nyng
853	sa(:,j,i) = sa_init
854	ENDDO
855	ENDDO
856	ENDIF
857
858	IF ( constant_diffusion ) THEN
859	km = km_constant
860	kh = km / prandtl_number
861	e = 0.0
862	ELSEIF ( e_init > 0.0 ) THEN
863	DO k = nzb+1, nzt
864	km(k,:,:) = 0.1 * l_grid(k) * SQRT( e_init )
865	ENDDO
866	km(nzb,:,:) = km(nzb+1,:,:)
867	km(nzt+1,:,:) = km(nzt,:,:)
868	kh = km / prandtl_number
869	e = e_init
870	ELSE
871	IF ( .NOT. ocean ) THEN
872	kh = 0.01 ! there must exist an initial diffusion, because
873	km = 0.01 ! otherwise no TKE would be produced by the
874	! production terms, as long as not yet
875	! e = (u/cm)*2 at k=nzb+1
876	ELSE
877	kh = 0.00001
878	km = 0.00001
879	ENDIF
880	e = 0.0
881	ENDIF
882	rif = 0.0
883	ts = 0.0
884	us = 0.0
885	usws = 0.0
886	uswst = top_momentumflux_u
887	vsws = 0.0
888	vswst = top_momentumflux_v
889	IF ( humidity .OR. passive_scalar ) qs = 0.0
890
891	!
892	!-- Compute initial temperature field and other constants used in case
893	!-- of a sloping surface
894	IF ( sloping_surface ) CALL init_slope
895
896	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
897	THEN
898	!
899	!-- Initialization will completely be done by the user
900	CALL user_init_3d_model
901
902	ENDIF
903	!
904	!-- Bottom boundary
905	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2 ) THEN
906	u(nzb,:,:) = 0.0
907	v(nzb,:,:) = 0.0
908	ENDIF
909
910	!
911	!-- Apply channel flow boundary condition
912	IF ( TRIM( bc_uv_t ) == 'dirichlet_0' ) THEN
913	u(nzt+1,:,:) = 0.0
914	v(nzt+1,:,:) = 0.0
915	ENDIF
916
917	!
918	!-- Calculate virtual potential temperature
919	IF ( humidity ) vpt = pt * ( 1.0 + 0.61 * q )
920
921	!
922	!-- Store initial profiles for output purposes etc.
923	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
924	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
925	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2) THEN
926	hom(nzb,1,5,:) = 0.0
927	hom(nzb,1,6,:) = 0.0
928	ENDIF
929	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
930	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
931	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
932
933	IF ( ocean ) THEN
934	!
935	!-- Store initial salinity profile
936	hom(:,1,26,:) = SPREAD( sa(:,nys,nxl), 2, statistic_regions+1 )
937	ENDIF
938
939	IF ( humidity ) THEN
940	!
941	!-- Store initial profile of total water content, virtual potential
942	!-- temperature
943	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
944	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
945	IF ( cloud_physics .OR. cloud_droplets ) THEN
946	!
947	!-- Store initial profile of specific humidity and potential
948	!-- temperature
949	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
950	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
951	ENDIF
952	ENDIF
953
954	IF ( passive_scalar ) THEN
955	!
956	!-- Store initial scalar profile
957	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
958	ENDIF
959
960	!
961	!-- Initialize fluxes at bottom surface
962	IF ( use_surface_fluxes ) THEN
963
964	IF ( constant_heatflux ) THEN
965	!
966	!-- Heat flux is prescribed
967	IF ( random_heatflux ) THEN
968	CALL disturb_heatflux
969	ELSE
970	shf = surface_heatflux
971	!
972	!-- Initialize shf with data from external file LSF_DATA
973	IF ( large_scale_forcing .AND. lsf_surf ) THEN
974	CALL ls_forcing_surf ( simulated_time )
975	ENDIF
976
977	!
978	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
979	IF ( TRIM( topography ) /= 'flat' ) THEN
980	DO i = nxlg, nxrg
981	DO j = nysg, nyng
982	IF ( nzb_s_inner(j,i) /= 0 ) THEN
983	shf(j,i) = wall_heatflux(0)
984	ENDIF
985	ENDDO
986	ENDDO
987	ENDIF
988	ENDIF
989	ENDIF
990
991	!
992	!-- Determine the near-surface water flux
993	IF ( humidity .OR. passive_scalar ) THEN
994	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
995	precipitation ) THEN
996	qrsws = 0.0
997	nrsws = 0.0
998	ENDIF
999	IF ( constant_waterflux ) THEN
1000	qsws = surface_waterflux
1001	!
1002	!-- Over topography surface_waterflux is replaced by
1003	!-- wall_humidityflux(0)
1004	IF ( TRIM( topography ) /= 'flat' ) THEN
1005	wall_qflux = wall_humidityflux
1006	DO i = nxlg, nxrg
1007	DO j = nysg, nyng
1008	IF ( nzb_s_inner(j,i) /= 0 ) THEN
1009	qsws(j,i) = wall_qflux(0)
1010	ENDIF
1011	ENDDO
1012	ENDDO
1013	ENDIF
1014	ENDIF
1015	ENDIF
1016
1017	ENDIF
1018
1019	!
1020	!-- Initialize fluxes at top surface
1021	!-- Currently, only the heatflux and salinity flux can be prescribed.
1022	!-- The latent flux is zero in this case!
1023	IF ( use_top_fluxes ) THEN
1024
1025	IF ( constant_top_heatflux ) THEN
1026	!
1027	!-- Heat flux is prescribed
1028	tswst = top_heatflux
1029
1030	IF ( humidity .OR. passive_scalar ) THEN
1031	qswst = 0.0
1032	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1033	precipitation ) THEN
1034	nrswst = 0.0
1035	qrswst = 0.0
1036	ENDIF
1037	ENDIF
1038
1039	IF ( ocean ) THEN
1040	saswsb = bottom_salinityflux
1041	saswst = top_salinityflux
1042	ENDIF
1043	ENDIF
1044
1045	!
1046	!-- Initialization in case of a coupled model run
1047	IF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
1048	tswst = 0.0
1049	ENDIF
1050
1051	ENDIF
1052
1053	!
1054	!-- Initialize Prandtl layer quantities
1055	IF ( prandtl_layer ) THEN
1056
1057	z0 = roughness_length
1058	z0h = z0h_factor * z0
1059
1060	IF ( .NOT. constant_heatflux ) THEN
1061	!
1062	!-- Surface temperature is prescribed. Here the heat flux cannot be
1063	!-- simply estimated, because therefore rif, u* and theta* would have
1064	!-- to be computed by iteration. This is why the heat flux is assumed
1065	!-- to be zero before the first time step. It approaches its correct
1066	!-- value in the course of the first few time steps.
1067	shf = 0.0
1068	ENDIF
1069
1070	IF ( humidity .OR. passive_scalar ) THEN
1071	IF ( .NOT. constant_waterflux ) qsws = 0.0
1072	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1073	precipitation ) THEN
1074	qrsws = 0.0
1075	nrsws = 0.0
1076	ENDIF
1077	ENDIF
1078
1079	ENDIF
1080
1081	!
1082	!-- Set the reference state to be used in the buoyancy terms (for ocean runs
1083	!-- the reference state will be set (overwritten) in init_ocean)
1084	IF ( use_single_reference_value ) THEN
1085	IF ( .NOT. humidity ) THEN
1086	ref_state(:) = pt_reference
1087	ELSE
1088	ref_state(:) = vpt_reference
1089	ENDIF
1090	ELSE
1091	IF ( .NOT. humidity ) THEN
1092	ref_state(:) = pt_init(:)
1093	ELSE
1094	ref_state(:) = vpt(:,nys,nxl)
1095	ENDIF
1096	ENDIF
1097
1098	!
1099	!-- For the moment, vertical velocity is zero
1100	w = 0.0
1101
1102	!
1103	!-- Initialize array sums (must be defined in first call of pres)
1104	sums = 0.0
1105
1106	!
1107	!-- In case of iterative solvers, p must get an initial value
1108	IF ( psolver == 'multigrid' .OR. psolver == 'sor' ) p = 0.0
1109
1110	!
1111	!-- Treating cloud physics, liquid water content and precipitation amount
1112	!-- are zero at beginning of the simulation
1113	IF ( cloud_physics ) THEN
1114	ql = 0.0
1115	IF ( precipitation ) precipitation_amount = 0.0
1116	IF ( icloud_scheme == 0 ) THEN
1117	qc = 0.0
1118	nc_1d = nc_const
1119	ENDIF
1120	ENDIF
1121	!
1122	!-- Impose vortex with vertical axis on the initial velocity profile
1123	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
1124	CALL init_rankine
1125	ENDIF
1126
1127	!
1128	!-- Impose temperature anomaly (advection test only)
1129	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
1130	CALL init_pt_anomaly
1131	ENDIF
1132
1133	!
1134	!-- If required, change the surface temperature at the start of the 3D run
1135	IF ( pt_surface_initial_change /= 0.0 ) THEN
1136	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
1137	ENDIF
1138
1139	!
1140	!-- If required, change the surface humidity/scalar at the start of the 3D
1141	!-- run
1142	IF ( ( humidity .OR. passive_scalar ) .AND. &
1143	q_surface_initial_change /= 0.0 ) THEN
1144	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
1145	ENDIF
1146	!
1147	!-- Initialize the random number generator (from numerical recipes)
1148	CALL random_function_ini
1149
1150	!
1151	!-- Initialize old and new time levels.
1152	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
1153	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
1154
1155	IF ( humidity .OR. passive_scalar ) THEN
1156	tq_m = 0.0
1157	q_p = q
1158	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1159	precipitation ) THEN
1160	tqr_m = 0.0
1161	qr_p = qr
1162	tnr_m = 0.0
1163	nr_p = nr
1164	ENDIF
1165	ENDIF
1166
1167	IF ( ocean ) THEN
1168	tsa_m = 0.0
1169	sa_p = sa
1170	ENDIF
1171
1172
1173	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' .OR. &
1174	TRIM( initializing_actions ) == 'cyclic_fill' ) &
1175	THEN
1176	!
1177	!-- When reading data for cyclic fill of 3D prerun data files, read
1178	!-- some of the global variables from the restart file which are required
1179	!-- for initializing the inflow
1180	IF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1181
1182	DO i = 0, io_blocks-1
1183	IF ( i == io_group ) THEN
1184	CALL read_parts_of_var_list
1185	CALL close_file( 13 )
1186	ENDIF
1187	#if defined( __parallel )
1188	CALL MPI_BARRIER( comm2d, ierr )
1189	#endif
1190	ENDDO
1191
1192	ENDIF
1193
1194	!
1195	!-- Read binary data from restart file
1196	DO i = 0, io_blocks-1
1197	IF ( i == io_group ) THEN
1198	CALL read_3d_binary
1199	ENDIF
1200	#if defined( __parallel )
1201	CALL MPI_BARRIER( comm2d, ierr )
1202	#endif
1203	ENDDO
1204
1205	!
1206	!-- Initialization of the turbulence recycling method
1207	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. &
1208	turbulent_inflow ) THEN
1209	!
1210	!-- First store the profiles to be used at the inflow.
1211	!-- These profiles are the (temporally) and horizontally averaged vertical
1212	!-- profiles from the prerun. Alternatively, prescribed profiles
1213	!-- for u,v-components can be used.
1214	ALLOCATE( mean_inflow_profiles(nzb:nzt+1,5) )
1215
1216	IF ( use_prescribed_profile_data ) THEN
1217	mean_inflow_profiles(:,1) = u_init ! u
1218	mean_inflow_profiles(:,2) = v_init ! v
1219	ELSE
1220	mean_inflow_profiles(:,1) = hom_sum(:,1,0) ! u
1221	mean_inflow_profiles(:,2) = hom_sum(:,2,0) ! v
1222	ENDIF
1223	mean_inflow_profiles(:,4) = hom_sum(:,4,0) ! pt
1224	mean_inflow_profiles(:,5) = hom_sum(:,8,0) ! e
1225
1226	!
1227	!-- If necessary, adjust the horizontal flow field to the prescribed
1228	!-- profiles
1229	IF ( use_prescribed_profile_data ) THEN
1230	DO i = nxlg, nxrg
1231	DO j = nysg, nyng
1232	DO k = nzb, nzt+1
1233	u(k,j,i) = u(k,j,i) - hom_sum(k,1,0) + u_init(k)
1234	v(k,j,i) = v(k,j,i) - hom_sum(k,2,0) + v_init(k)
1235	ENDDO
1236	ENDDO
1237	ENDDO
1238	ENDIF
1239
1240	!
1241	!-- Use these mean profiles at the inflow (provided that Dirichlet
1242	!-- conditions are used)
1243	IF ( inflow_l ) THEN
1244	DO j = nysg, nyng
1245	DO k = nzb, nzt+1
1246	u(k,j,nxlg:-1) = mean_inflow_profiles(k,1)
1247	v(k,j,nxlg:-1) = mean_inflow_profiles(k,2)
1248	w(k,j,nxlg:-1) = 0.0
1249	pt(k,j,nxlg:-1) = mean_inflow_profiles(k,4)
1250	e(k,j,nxlg:-1) = mean_inflow_profiles(k,5)
1251	ENDDO
1252	ENDDO
1253	ENDIF
1254
1255	!
1256	!-- Calculate the damping factors to be used at the inflow. For a
1257	!-- turbulent inflow the turbulent fluctuations have to be limited
1258	!-- vertically because otherwise the turbulent inflow layer will grow
1259	!-- in time.
1260	IF ( inflow_damping_height == 9999999.9 ) THEN
1261	!
1262	!-- Default: use the inversion height calculated by the prerun; if
1263	!-- this is zero, inflow_damping_height must be explicitly
1264	!-- specified.
1265	IF ( hom_sum(nzb+6,pr_palm,0) /= 0.0 ) THEN
1266	inflow_damping_height = hom_sum(nzb+6,pr_palm,0)
1267	ELSE
1268	WRITE( message_string, * ) 'inflow_damping_height must be ',&
1269	'explicitly specified because&the inversion height ', &
1270	'calculated by the prerun is zero.'
1271	CALL message( 'init_3d_model', 'PA0318', 1, 2, 0, 6, 0 )
1272	ENDIF
1273
1274	ENDIF
1275
1276	IF ( inflow_damping_width == 9999999.9 ) THEN
1277	!
1278	!-- Default for the transition range: one tenth of the undamped
1279	!-- layer
1280	inflow_damping_width = 0.1 * inflow_damping_height
1281
1282	ENDIF
1283
1284	ALLOCATE( inflow_damping_factor(nzb:nzt+1) )
1285
1286	DO k = nzb, nzt+1
1287
1288	IF ( zu(k) <= inflow_damping_height ) THEN
1289	inflow_damping_factor(k) = 1.0
1290	ELSEIF ( zu(k) <= ( inflow_damping_height + inflow_damping_width ) ) THEN
1291	inflow_damping_factor(k) = 1.0 - &
1292	( zu(k) - inflow_damping_height ) / &
1293	inflow_damping_width
1294	ELSE
1295	inflow_damping_factor(k) = 0.0
1296	ENDIF
1297
1298	ENDDO
1299
1300	ENDIF
1301
1302	!
1303	!-- Inside buildings set velocities and TKE back to zero
1304	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. &
1305	topography /= 'flat' ) THEN
1306	!
1307	!-- Inside buildings set velocities and TKE back to zero.
1308	!-- Other scalars (pt, q, s, km, kh, p, sa, ...) are ignored at present,
1309	!-- maybe revise later.
1310	DO i = nxlg, nxrg
1311	DO j = nysg, nyng
1312	u (nzb:nzb_u_inner(j,i),j,i) = 0.0
1313	v (nzb:nzb_v_inner(j,i),j,i) = 0.0
1314	w (nzb:nzb_w_inner(j,i),j,i) = 0.0
1315	e (nzb:nzb_w_inner(j,i),j,i) = 0.0
1316	tu_m(nzb:nzb_u_inner(j,i),j,i) = 0.0
1317	tv_m(nzb:nzb_v_inner(j,i),j,i) = 0.0
1318	tw_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1319	te_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1320	tpt_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1321	ENDDO
1322	ENDDO
1323
1324	ENDIF
1325
1326	!
1327	!-- Calculate initial temperature field and other constants used in case
1328	!-- of a sloping surface
1329	IF ( sloping_surface ) CALL init_slope
1330
1331	!
1332	!-- Initialize new time levels (only done in order to set boundary values
1333	!-- including ghost points)
1334	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
1335	IF ( humidity .OR. passive_scalar ) THEN
1336	q_p = q
1337	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1338	precipitation ) THEN
1339	qr_p = qr
1340	nr_p = nr
1341	ENDIF
1342	ENDIF
1343	IF ( ocean ) sa_p = sa
1344
1345	!
1346	!-- Allthough tendency arrays are set in prognostic_equations, they have
1347	!-- have to be predefined here because they are used (but multiplied with 0)
1348	!-- there before they are set.
1349	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
1350	IF ( humidity .OR. passive_scalar ) THEN
1351	tq_m = 0.0
1352	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
1353	precipitation ) THEN
1354	tqr_m = 0.0
1355	tnr_m = 0.0
1356	ENDIF
1357	ENDIF
1358	IF ( ocean ) tsa_m = 0.0
1359
1360	ELSE
1361	!
1362	!-- Actually this part of the programm should not be reached
1363	message_string = 'unknown initializing problem'
1364	CALL message( 'init_3d_model', 'PA0193', 1, 2, 0, 6, 0 )
1365	ENDIF
1366
1367
1368	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1369	!
1370	!-- Initialize old timelevels needed for radiation boundary conditions
1371	IF ( outflow_l ) THEN
1372	u_m_l(:,:,:) = u(:,:,1:2)
1373	v_m_l(:,:,:) = v(:,:,0:1)
1374	w_m_l(:,:,:) = w(:,:,0:1)
1375	ENDIF
1376	IF ( outflow_r ) THEN
1377	u_m_r(:,:,:) = u(:,:,nx-1:nx)
1378	v_m_r(:,:,:) = v(:,:,nx-1:nx)
1379	w_m_r(:,:,:) = w(:,:,nx-1:nx)
1380	ENDIF
1381	IF ( outflow_s ) THEN
1382	u_m_s(:,:,:) = u(:,0:1,:)
1383	v_m_s(:,:,:) = v(:,1:2,:)
1384	w_m_s(:,:,:) = w(:,0:1,:)
1385	ENDIF
1386	IF ( outflow_n ) THEN
1387	u_m_n(:,:,:) = u(:,ny-1:ny,:)
1388	v_m_n(:,:,:) = v(:,ny-1:ny,:)
1389	w_m_n(:,:,:) = w(:,ny-1:ny,:)
1390	ENDIF
1391
1392	ENDIF
1393
1394	!
1395	!-- Calculate the initial volume flow at the right and north boundary
1396	IF ( conserve_volume_flow ) THEN
1397
1398	IF ( use_prescribed_profile_data ) THEN
1399
1400	volume_flow_initial_l = 0.0
1401	volume_flow_area_l = 0.0
1402
1403	IF ( nxr == nx ) THEN
1404	DO j = nys, nyn
1405	DO k = nzb_2d(j,nx)+1, nzt
1406	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1407	u_init(k) * dzw(k)
1408	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1409	ENDDO
1410	ENDDO
1411	ENDIF
1412
1413	IF ( nyn == ny ) THEN
1414	DO i = nxl, nxr
1415	DO k = nzb_2d(ny,i)+1, nzt
1416	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1417	v_init(k) * dzw(k)
1418	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1419	ENDDO
1420	ENDDO
1421	ENDIF
1422
1423	#if defined( __parallel )
1424	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1425	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1426	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1427	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1428
1429	#else
1430	volume_flow_initial = volume_flow_initial_l
1431	volume_flow_area = volume_flow_area_l
1432	#endif
1433
1434	ELSEIF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1435
1436	volume_flow_initial_l = 0.0
1437	volume_flow_area_l = 0.0
1438
1439	IF ( nxr == nx ) THEN
1440	DO j = nys, nyn
1441	DO k = nzb_2d(j,nx)+1, nzt
1442	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1443	hom_sum(k,1,0) * dzw(k)
1444	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1445	ENDDO
1446	ENDDO
1447	ENDIF
1448
1449	IF ( nyn == ny ) THEN
1450	DO i = nxl, nxr
1451	DO k = nzb_2d(ny,i)+1, nzt
1452	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1453	hom_sum(k,2,0) * dzw(k)
1454	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1455	ENDDO
1456	ENDDO
1457	ENDIF
1458
1459	#if defined( __parallel )
1460	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1461	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1462	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1463	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1464
1465	#else
1466	volume_flow_initial = volume_flow_initial_l
1467	volume_flow_area = volume_flow_area_l
1468	#endif
1469
1470	ELSEIF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1471
1472	volume_flow_initial_l = 0.0
1473	volume_flow_area_l = 0.0
1474
1475	IF ( nxr == nx ) THEN
1476	DO j = nys, nyn
1477	DO k = nzb_2d(j,nx)+1, nzt
1478	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1479	u(k,j,nx) * dzw(k)
1480	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1481	ENDDO
1482	ENDDO
1483	ENDIF
1484
1485	IF ( nyn == ny ) THEN
1486	DO i = nxl, nxr
1487	DO k = nzb_2d(ny,i)+1, nzt
1488	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1489	v(k,ny,i) * dzw(k)
1490	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1491	ENDDO
1492	ENDDO
1493	ENDIF
1494
1495	#if defined( __parallel )
1496	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1497	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1498	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1499	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1500
1501	#else
1502	volume_flow_initial = volume_flow_initial_l
1503	volume_flow_area = volume_flow_area_l
1504	#endif
1505
1506	ENDIF
1507
1508	!
1509	!-- In case of 'bulk_velocity' mode, volume_flow_initial is calculated
1510	!-- from u\|v_bulk instead
1511	IF ( TRIM( conserve_volume_flow_mode ) == 'bulk_velocity' ) THEN
1512	volume_flow_initial(1) = u_bulk * volume_flow_area(1)
1513	volume_flow_initial(2) = v_bulk * volume_flow_area(2)
1514	ENDIF
1515
1516	ENDIF
1517
1518	!
1519	!-- Initialize quantities for special advections schemes
1520	CALL init_advec
1521
1522	!
1523	!-- Impose random perturbation on the horizontal velocity field and then
1524	!-- remove the divergences from the velocity field at the initial stage
1525	IF ( create_disturbances .AND. &
1526	TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
1527	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
1528
1529	CALL disturb_field( nzb_u_inner, tend, u )
1530	CALL disturb_field( nzb_v_inner, tend, v )
1531	n_sor = nsor_ini
1532	!$acc data copyin( d, ddzu, ddzw, nzb_s_inner, nzb_u_inner ) &
1533	!$acc copyin( nzb_v_inner, nzb_w_inner, p, rflags_s_inner, tend ) &
1534	!$acc copyin( weight_pres, weight_substep ) &
1535	!$acc copy( tri, tric, u, v, w )
1536	CALL pres
1537	!$acc end data
1538	n_sor = nsor
1539	ENDIF
1540
1541	!
1542	!-- Initialization of the leaf area density
1543	IF ( plant_canopy ) THEN
1544
1545	SELECT CASE ( TRIM( canopy_mode ) )
1546
1547	CASE( 'block' )
1548
1549	DO i = nxlg, nxrg
1550	DO j = nysg, nyng
1551	lad_s(:,j,i) = lad(:)
1552	cdc(:,j,i) = drag_coefficient
1553	IF ( passive_scalar ) THEN
1554	sls(:,j,i) = leaf_surface_concentration
1555	sec(:,j,i) = scalar_exchange_coefficient
1556	ENDIF
1557	ENDDO
1558	ENDDO
1559
1560	CASE DEFAULT
1561
1562	!
1563	!-- The DEFAULT case is reached either if the parameter
1564	!-- canopy mode contains a wrong character string or if the
1565	!-- user has coded a special case in the user interface.
1566	!-- There, the subroutine user_init_plant_canopy checks
1567	!-- which of these two conditions applies.
1568	CALL user_init_plant_canopy
1569
1570	END SELECT
1571
1572	CALL exchange_horiz( lad_s, nbgp )
1573	CALL exchange_horiz( cdc, nbgp )
1574
1575	IF ( passive_scalar ) THEN
1576	CALL exchange_horiz( sls, nbgp )
1577	CALL exchange_horiz( sec, nbgp )
1578	ENDIF
1579
1580	!
1581	!-- Sharp boundaries of the plant canopy in horizontal directions
1582	!-- In vertical direction the interpolation is retained, as the leaf
1583	!-- area density is initialised by prescribing a vertical profile
1584	!-- consisting of piecewise linear segments. The upper boundary
1585	!-- of the plant canopy is now defined by lad_w(pch_index,:,:) = 0.0.
1586
1587	DO i = nxl, nxr
1588	DO j = nys, nyn
1589	DO k = nzb, nzt+1
1590	IF ( lad_s(k,j,i) > 0.0 ) THEN
1591	lad_u(k,j,i) = lad_s(k,j,i)
1592	lad_u(k,j,i+1) = lad_s(k,j,i)
1593	lad_v(k,j,i) = lad_s(k,j,i)
1594	lad_v(k,j+1,i) = lad_s(k,j,i)
1595	ENDIF
1596	ENDDO
1597	DO k = nzb, nzt
1598	lad_w(k,j,i) = 0.5 * ( lad_s(k+1,j,i) + lad_s(k,j,i) )
1599	ENDDO
1600	ENDDO
1601	ENDDO
1602
1603	lad_w(pch_index,:,:) = 0.0
1604	lad_w(nzt+1,:,:) = lad_w(nzt,:,:)
1605
1606	CALL exchange_horiz( lad_u, nbgp )
1607	CALL exchange_horiz( lad_v, nbgp )
1608	CALL exchange_horiz( lad_w, nbgp )
1609
1610	!
1611	!-- Initialisation of the canopy heat source distribution
1612	IF ( cthf /= 0.0 ) THEN
1613	!
1614	!-- Piecewise evaluation of the leaf area index by
1615	!-- integration of the leaf area density
1616	lai(:,:,:) = 0.0
1617	DO i = nxlg, nxrg
1618	DO j = nysg, nyng
1619	DO k = pch_index-1, 0, -1
1620	lai(k,j,i) = lai(k+1,j,i) + &
1621	( 0.5 * ( lad_w(k+1,j,i) + &
1622	lad_s(k+1,j,i) ) * &
1623	( zw(k+1) - zu(k+1) ) ) + &
1624	( 0.5 * ( lad_w(k,j,i) + &
1625	lad_s(k+1,j,i) ) * &
1626	( zu(k+1) - zw(k) ) )
1627	ENDDO
1628	ENDDO
1629	ENDDO
1630
1631	!
1632	!-- Evaluation of the upward kinematic vertical heat flux within the
1633	!-- canopy
1634	DO i = nxlg, nxrg
1635	DO j = nysg, nyng
1636	DO k = 0, pch_index
1637	canopy_heat_flux(k,j,i) = cthf * &
1638	exp( -0.6 * lai(k,j,i) )
1639	ENDDO
1640	ENDDO
1641	ENDDO
1642
1643	!
1644	!-- The near surface heat flux is derived from the heat flux
1645	!-- distribution within the canopy
1646	shf(:,:) = canopy_heat_flux(0,:,:)
1647
1648	ENDIF
1649
1650	ENDIF
1651
1652	!
1653	!-- If required, initialize dvrp-software
1654	IF ( dt_dvrp /= 9999999.9 ) CALL init_dvrp
1655
1656	IF ( ocean ) THEN
1657	!
1658	!-- Initialize quantities needed for the ocean model
1659	CALL init_ocean
1660
1661	ELSE
1662	!
1663	!-- Initialize quantities for handling cloud physics
1664	!-- This routine must be called before lpm_init, because
1665	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
1666	!-- lpm_init) is not defined.
1667	CALL init_cloud_physics
1668	ENDIF
1669
1670	!
1671	!-- If required, initialize particles
1672	IF ( particle_advection ) CALL lpm_init
1673
1674	!
1675	!-- Initialize the ws-scheme.
1676	IF ( ws_scheme_sca .OR. ws_scheme_mom ) CALL ws_init
1677
1678	!
1679	!-- Setting weighting factors for calculation of perturbation pressure
1680	!-- and turbulent quantities from the RK substeps
1681	IF ( TRIM(timestep_scheme) == 'runge-kutta-3' ) THEN ! for RK3-method
1682
1683	weight_substep(1) = 1./6.
1684	weight_substep(2) = 3./10.
1685	weight_substep(3) = 8./15.
1686
1687	weight_pres(1) = 1./3.
1688	weight_pres(2) = 5./12.
1689	weight_pres(3) = 1./4.
1690
1691	ELSEIF ( TRIM(timestep_scheme) == 'runge-kutta-2' ) THEN ! for RK2-method
1692
1693	weight_substep(1) = 1./2.
1694	weight_substep(2) = 1./2.
1695
1696	weight_pres(1) = 1./2.
1697	weight_pres(2) = 1./2.
1698
1699	ELSE ! for Euler-method
1700
1701	weight_substep(1) = 1.0
1702	weight_pres(1) = 1.0
1703
1704	ENDIF
1705
1706	!
1707	!-- Initialize Rayleigh damping factors
1708	rdf = 0.0
1709	rdf_sc = 0.0
1710	IF ( rayleigh_damping_factor /= 0.0 ) THEN
1711	IF ( .NOT. ocean ) THEN
1712	DO k = nzb+1, nzt
1713	IF ( zu(k) >= rayleigh_damping_height ) THEN
1714	rdf(k) = rayleigh_damping_factor * &
1715	( SIN( pi * 0.5 * ( zu(k) - rayleigh_damping_height ) &
1716	/ ( zu(nzt) - rayleigh_damping_height ) )&
1717	)**2
1718	ENDIF
1719	ENDDO
1720	ELSE
1721	DO k = nzt, nzb+1, -1
1722	IF ( zu(k) <= rayleigh_damping_height ) THEN
1723	rdf(k) = rayleigh_damping_factor * &
1724	( SIN( pi * 0.5 * ( rayleigh_damping_height - zu(k) ) &
1725	/ ( rayleigh_damping_height - zu(nzb+1)))&
1726	)**2
1727	ENDIF
1728	ENDDO
1729	ENDIF
1730	ENDIF
1731	IF ( scalar_rayleigh_damping ) rdf_sc = rdf
1732
1733	!
1734	!-- Initialize the starting level and the vertical smoothing factor used for
1735	!-- the external pressure gradient
1736	dp_smooth_factor = 1.0
1737	IF ( dp_external ) THEN
1738	!
1739	!-- Set the starting level dp_level_ind_b only if it has not been set before
1740	!-- (e.g. in init_grid).
1741	IF ( dp_level_ind_b == 0 ) THEN
1742	ind_array = MINLOC( ABS( dp_level_b - zu ) )
1743	dp_level_ind_b = ind_array(1) - 1 + nzb
1744	! MINLOC uses lower array bound 1
1745	ENDIF
1746	IF ( dp_smooth ) THEN
1747	dp_smooth_factor(:dp_level_ind_b) = 0.0
1748	DO k = dp_level_ind_b+1, nzt
1749	dp_smooth_factor(k) = 0.5 * ( 1.0 + SIN( pi * &
1750	( REAL( k - dp_level_ind_b ) / &
1751	REAL( nzt - dp_level_ind_b ) - 0.5 ) ) )
1752	ENDDO
1753	ENDIF
1754	ENDIF
1755
1756	!
1757	!-- Initialize damping zone for the potential temperature in case of
1758	!-- non-cyclic lateral boundaries. The damping zone has the maximum value
1759	!-- at the inflow boundary and decreases to zero at pt_damping_width.
1760	ptdf_x = 0.0
1761	ptdf_y = 0.0
1762	IF ( bc_lr_dirrad ) THEN
1763	DO i = nxl, nxr
1764	IF ( ( i * dx ) < pt_damping_width ) THEN
1765	ptdf_x(i) = pt_damping_factor * ( SIN( pi * 0.5 * &
1766	REAL( pt_damping_width - i * dx ) / ( &
1767	REAL( pt_damping_width ) ) ) )**2
1768	ENDIF
1769	ENDDO
1770	ELSEIF ( bc_lr_raddir ) THEN
1771	DO i = nxl, nxr
1772	IF ( ( i * dx ) > ( nx * dx - pt_damping_width ) ) THEN
1773	ptdf_x(i) = pt_damping_factor * &
1774	SIN( pi * 0.5 * ( ( i - nx ) * dx + pt_damping_width ) / &
1775	REAL( pt_damping_width ) )**2
1776	ENDIF
1777	ENDDO
1778	ELSEIF ( bc_ns_dirrad ) THEN
1779	DO j = nys, nyn
1780	IF ( ( j * dy ) > ( ny * dy - pt_damping_width ) ) THEN
1781	ptdf_y(j) = pt_damping_factor * &
1782	SIN( pi * 0.5 * ( ( j - ny ) * dy + pt_damping_width ) / &
1783	REAL( pt_damping_width ) )**2
1784	ENDIF
1785	ENDDO
1786	ELSEIF ( bc_ns_raddir ) THEN
1787	DO j = nys, nyn
1788	IF ( ( j * dy ) < pt_damping_width ) THEN
1789	ptdf_y(j) = pt_damping_factor * &
1790	SIN( pi * 0.5 * ( pt_damping_width - j * dy ) / &
1791	REAL( pt_damping_width ) )**2
1792	ENDIF
1793	ENDDO
1794	ENDIF
1795
1796	!
1797	!-- Initialize local summation arrays for routine flow_statistics.
1798	!-- This is necessary because they may not yet have been initialized when they
1799	!-- are called from flow_statistics (or - depending on the chosen model run -
1800	!-- are never initialized)
1801	sums_divnew_l = 0.0
1802	sums_divold_l = 0.0
1803	sums_l_l = 0.0
1804	sums_up_fraction_l = 0.0
1805	sums_wsts_bc_l = 0.0
1806
1807	!
1808	!-- Pre-set masks for regional statistics. Default is the total model domain.
1809	!-- Ghost points are excluded because counting values at the ghost boundaries
1810	!-- would bias the statistics
1811	rmask = 1.0
1812	rmask(:,nxlg:nxl-1,:) = 0.0; rmask(:,nxr+1:nxrg,:) = 0.0
1813	rmask(nysg:nys-1,:,:) = 0.0; rmask(nyn+1:nyng,:,:) = 0.0
1814
1815	!
1816	!-- User-defined initializing actions. Check afterwards, if maximum number
1817	!-- of allowed timeseries is exceeded
1818	CALL user_init
1819
1820	IF ( dots_num > dots_max ) THEN
1821	WRITE( message_string, * ) 'number of time series quantities exceeds', &
1822	' its maximum of dots_max = ', dots_max, &
1823	' &Please increase dots_max in modules.f90.'
1824	CALL message( 'init_3d_model', 'PA0194', 1, 2, 0, 6, 0 )
1825	ENDIF
1826
1827	!
1828	!-- Input binary data file is not needed anymore. This line must be placed
1829	!-- after call of user_init!
1830	CALL close_file( 13 )
1831
1832	!
1833	!-- Compute total sum of active mask grid points
1834	!-- ngp_2dh: number of grid points of a horizontal cross section through the
1835	!-- total domain
1836	!-- ngp_3d: number of grid points of the total domain
1837	ngp_2dh_outer_l = 0
1838	ngp_2dh_outer = 0
1839	ngp_2dh_s_inner_l = 0
1840	ngp_2dh_s_inner = 0
1841	ngp_2dh_l = 0
1842	ngp_2dh = 0
1843	ngp_3d_inner_l = 0.0
1844	ngp_3d_inner = 0
1845	ngp_3d = 0
1846	ngp_sums = ( nz + 2 ) * ( pr_palm + max_pr_user )
1847
1848	DO sr = 0, statistic_regions
1849	DO i = nxl, nxr
1850	DO j = nys, nyn
1851	IF ( rmask(j,i,sr) == 1.0 ) THEN
1852	!
1853	!-- All xy-grid points
1854	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
1855	!
1856	!-- xy-grid points above topography
1857	DO k = nzb_s_outer(j,i), nz + 1
1858	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
1859	ENDDO
1860	DO k = nzb_s_inner(j,i), nz + 1
1861	ngp_2dh_s_inner_l(k,sr) = ngp_2dh_s_inner_l(k,sr) + 1
1862	ENDDO
1863	!
1864	!-- All grid points of the total domain above topography
1865	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
1866	( nz - nzb_s_inner(j,i) + 2 )
1867	ENDIF
1868	ENDDO
1869	ENDDO
1870	ENDDO
1871
1872	sr = statistic_regions + 1
1873	#if defined( __parallel )
1874	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1875	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
1876	comm2d, ierr )
1877	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1878	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
1879	MPI_INTEGER, MPI_SUM, comm2d, ierr )
1880	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1881	CALL MPI_ALLREDUCE( ngp_2dh_s_inner_l(0,0), ngp_2dh_s_inner(0,0), &
1882	(nz+2)*sr, MPI_INTEGER, MPI_SUM, comm2d, ierr )
1883	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1884	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner_tmp(0), sr, MPI_REAL, &
1885	MPI_SUM, comm2d, ierr )
1886	ngp_3d_inner = INT( ngp_3d_inner_tmp, KIND = SELECTED_INT_KIND( 18 ) )
1887	#else
1888	ngp_2dh = ngp_2dh_l
1889	ngp_2dh_outer = ngp_2dh_outer_l
1890	ngp_2dh_s_inner = ngp_2dh_s_inner_l
1891	ngp_3d_inner = INT( ngp_3d_inner_l, KIND = SELECTED_INT_KIND( 18 ) )
1892	#endif
1893
1894	ngp_3d = INT ( ngp_2dh, KIND = SELECTED_INT_KIND( 18 ) ) * &
1895	INT ( (nz + 2 ), KIND = SELECTED_INT_KIND( 18 ) )
1896
1897	!
1898	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
1899	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
1900	!-- the respective subdomain lie below the surface topography
1901	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
1902	ngp_3d_inner = MAX( INT(1, KIND = SELECTED_INT_KIND( 18 )), &
1903	ngp_3d_inner(:) )
1904	ngp_2dh_s_inner = MAX( 1, ngp_2dh_s_inner(:,:) )
1905
1906	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l, ngp_3d_inner_tmp )
1907
1908
1909	END SUBROUTINE init_3d_model

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