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source: palm/trunk/SOURCE/init_3d_model.f90 @ 278

Last change on this file since 278 was 274, checked in by heinze, 16 years ago
Indentation of the message calls corrected
Property svn:keywords set to `Id`
File size: 50.6 KB

Line
1	#if defined( __ibmy_special )
2	@PROCESS NOOPTimize
3	#endif
4	SUBROUTINE init_3d_model
5
6	!------------------------------------------------------------------------------!
7	! Current revisions:
8	! -----------------
9	! Output of messages replaced by message handling routine.
10	! Set the starting level and the vertical smoothing factor used for
11	! the external pressure gradient
12	! +conserve_volume_flow_mode: 'default', 'initial_profiles', 'inflow_profile'
13	! and 'bulk_velocity'
14	!
15	! Former revisions:
16	! -----------------
17	! $Id: init_3d_model.f90 274 2009-03-26 15:11:21Z raasch $
18	!
19	! 181 2008-07-30 07:07:47Z raasch
20	! bugfix: zero assignments to tendency arrays in case of restarts,
21	! further extensions and modifications in the initialisation of the plant
22	! canopy model,
23	! allocation of hom_sum moved to parin, initialization of spectrum_x\|y directly
24	! after allocating theses arrays,
25	! read data for recycling added as new initialization option,
26	! dummy allocation for diss
27	!
28	! 138 2007-11-28 10:03:58Z letzel
29	! New counter ngp_2dh_s_inner.
30	! Allow new case bc_uv_t = 'dirichlet_0' for channel flow.
31	! Corrected calculation of initial volume flow for 'set_1d-model_profiles' and
32	! 'set_constant_profiles' in case of buildings in the reference cross-sections.
33	!
34	! 108 2007-08-24 15:10:38Z letzel
35	! Flux initialization in case of coupled runs, +momentum fluxes at top boundary,
36	! +arrays for phase speed c_u, c_v, c_w, indices for u\|v\|w_m_l\|r changed
37	! +qswst_remote in case of atmosphere model with humidity coupled to ocean
38	! Rayleigh damping for ocean, optionally calculate km and kh from initial
39	! TKE e_init
40	!
41	! 97 2007-06-21 08:23:15Z raasch
42	! Initialization of salinity, call of init_ocean
43	!
44	! 87 2007-05-22 15:46:47Z raasch
45	! var_hom and var_sum renamed pr_palm
46	!
47	! 75 2007-03-22 09:54:05Z raasch
48	! Arrays for radiation boundary conditions are allocated (u_m_l, u_m_r, etc.),
49	! bugfix for cases with the outflow damping layer extending over more than one
50	! subdomain, moisture renamed humidity,
51	! new initializing action "by_user" calls user_init_3d_model,
52	! precipitation_amount/rate, ts_value are allocated, +module netcdf_control,
53	! initial velocities at nzb+1 are regarded for volume
54	! flow control in case they have been set zero before (to avoid small timesteps)
55	! -uvmean_outflow, uxrp, vynp eliminated
56	!
57	! 19 2007-02-23 04:53:48Z raasch
58	! +handling of top fluxes
59	!
60	! RCS Log replace by Id keyword, revision history cleaned up
61	!
62	! Revision 1.49 2006/08/22 15:59:07 raasch
63	! No optimization of this file on the ibmy (Yonsei Univ.)
64	!
65	! Revision 1.1 1998/03/09 16:22:22 raasch
66	! Initial revision
67	!
68	!
69	! Description:
70	! ------------
71	! Allocation of arrays and initialization of the 3D model via
72	! a) pre-run the 1D model
73	! or
74	! b) pre-set constant linear profiles
75	! or
76	! c) read values of a previous run
77	!------------------------------------------------------------------------------!
78
79	USE arrays_3d
80	USE averaging
81	USE cloud_parameters
82	USE constants
83	USE control_parameters
84	USE cpulog
85	USE indices
86	USE interfaces
87	USE model_1d
88	USE netcdf_control
89	USE particle_attributes
90	USE pegrid
91	USE profil_parameter
92	USE random_function_mod
93	USE statistics
94
95	IMPLICIT NONE
96
97	INTEGER :: i, ind_array(1), j, k, sr
98
99	INTEGER, DIMENSION(:), ALLOCATABLE :: ngp_2dh_l, ngp_3d_inner_l
100
101	INTEGER, DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l, &
102	ngp_2dh_s_inner_l
103
104	REAL :: a, b
105
106	REAL, DIMENSION(1:2) :: volume_flow_area_l, volume_flow_initial_l
107
108
109	!
110	!-- Allocate arrays
111	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
112	ngp_3d(0:statistic_regions), &
113	ngp_3d_inner(0:statistic_regions), &
114	ngp_3d_inner_l(0:statistic_regions), &
115	sums_divnew_l(0:statistic_regions), &
116	sums_divold_l(0:statistic_regions) )
117	ALLOCATE( dp_smooth_factor(nzb:nzt), rdf(nzb+1:nzt) )
118	ALLOCATE( ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
119	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
120	ngp_2dh_s_inner(nzb:nzt+1,0:statistic_regions), &
121	ngp_2dh_s_inner_l(nzb:nzt+1,0:statistic_regions), &
122	rmask(nys-1:nyn+1,nxl-1:nxr+1,0:statistic_regions), &
123	sums(nzb:nzt+1,pr_palm+max_pr_user), &
124	sums_l(nzb:nzt+1,pr_palm+max_pr_user,0:threads_per_task-1), &
125	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
126	sums_up_fraction_l(10,3,0:statistic_regions), &
127	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions), &
128	ts_value(var_ts,0:statistic_regions) )
129	ALLOCATE( km_damp_x(nxl-1:nxr+1), km_damp_y(nys-1:nyn+1) )
130
131	ALLOCATE( rif_1(nys-1:nyn+1,nxl-1:nxr+1), shf_1(nys-1:nyn+1,nxl-1:nxr+1), &
132	ts(nys-1:nyn+1,nxl-1:nxr+1), tswst_1(nys-1:nyn+1,nxl-1:nxr+1), &
133	us(nys-1:nyn+1,nxl-1:nxr+1), usws_1(nys-1:nyn+1,nxl-1:nxr+1), &
134	uswst_1(nys-1:nyn+1,nxl-1:nxr+1), &
135	vsws_1(nys-1:nyn+1,nxl-1:nxr+1), &
136	vswst_1(nys-1:nyn+1,nxl-1:nxr+1), z0(nys-1:nyn+1,nxl-1:nxr+1) )
137
138	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
139	!
140	!-- Leapfrog scheme needs two timelevels of diffusion quantities
141	ALLOCATE( rif_2(nys-1:nyn+1,nxl-1:nxr+1), &
142	shf_2(nys-1:nyn+1,nxl-1:nxr+1), &
143	tswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
144	usws_2(nys-1:nyn+1,nxl-1:nxr+1), &
145	uswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
146	vswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
147	vsws_2(nys-1:nyn+1,nxl-1:nxr+1) )
148	ENDIF
149
150	ALLOCATE( d(nzb+1:nzta,nys:nyna,nxl:nxra), &
151	e_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
152	e_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
153	e_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
154	kh_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
155	km_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
156	p(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
157	pt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
158	pt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
159	pt_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
160	tend(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
161	u_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
162	u_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
163	u_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
164	v_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
165	v_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
166	v_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
167	w_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
168	w_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
169	w_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
170
171	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
172	ALLOCATE( kh_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
173	km_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
174	ENDIF
175
176	IF ( humidity .OR. passive_scalar ) THEN
177	!
178	!-- 2D-humidity/scalar arrays
179	ALLOCATE ( qs(nys-1:nyn+1,nxl-1:nxr+1), &
180	qsws_1(nys-1:nyn+1,nxl-1:nxr+1), &
181	qswst_1(nys-1:nyn+1,nxl-1:nxr+1) )
182
183	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
184	ALLOCATE( qsws_2(nys-1:nyn+1,nxl-1:nxr+1), &
185	qswst_2(nys-1:nyn+1,nxl-1:nxr+1) )
186	ENDIF
187	!
188	!-- 3D-humidity/scalar arrays
189	ALLOCATE( q_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
190	q_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
191	q_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
192
193	!
194	!-- 3D-arrays needed for humidity only
195	IF ( humidity ) THEN
196	ALLOCATE( vpt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
197
198	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
199	ALLOCATE( vpt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
200	ENDIF
201
202	IF ( cloud_physics ) THEN
203	!
204	!-- Liquid water content
205	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
206	!
207	!-- Precipitation amount and rate (only needed if output is switched)
208	ALLOCATE( precipitation_amount(nys-1:nyn+1,nxl-1:nxr+1), &
209	precipitation_rate(nys-1:nyn+1,nxl-1:nxr+1) )
210	ENDIF
211
212	IF ( cloud_droplets ) THEN
213	!
214	!-- Liquid water content, change in liquid water content,
215	!-- real volume of particles (with weighting), volume of particles
216	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
217	ql_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
218	ql_v(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
219	ql_vp(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
220	ENDIF
221
222	ENDIF
223
224	ENDIF
225
226	IF ( ocean ) THEN
227	ALLOCATE( saswsb_1(nys-1:nyn+1,nxl-1:nxr+1), &
228	saswst_1(nys-1:nyn+1,nxl-1:nxr+1) )
229	ALLOCATE( rho_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
230	sa_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
231	sa_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
232	sa_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
233	rho => rho_1 ! routine calc_mean_profile requires density to be a
234	! pointer
235	IF ( humidity_remote ) THEN
236	ALLOCATE( qswst_remote(nys-1:nyn+1,nxl-1:nxr+1) )
237	qswst_remote = 0.0
238	ENDIF
239	ENDIF
240
241	!
242	!-- 3D-array for storing the dissipation, needed for calculating the sgs
243	!-- particle velocities
244	IF ( use_sgs_for_particles ) THEN
245	ALLOCATE ( diss(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
246	ELSE
247	ALLOCATE ( diss(2,2,2) ) ! required because diss is used as a
248	! formal parameter
249	ENDIF
250
251	IF ( dt_dosp /= 9999999.9 ) THEN
252	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
253	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
254	spectrum_x = 0.0
255	spectrum_y = 0.0
256	ENDIF
257
258	!
259	!-- 3D-arrays for the leaf area density and the canopy drag coefficient
260	IF ( plant_canopy ) THEN
261	ALLOCATE ( lad_s(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
262	lad_u(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
263	lad_v(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
264	lad_w(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
265	cdc(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
266
267	IF ( passive_scalar ) THEN
268	ALLOCATE ( sls(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
269	sec(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
270	ENDIF
271
272	IF ( cthf /= 0.0 ) THEN
273	ALLOCATE ( lai(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
274	canopy_heat_flux(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
275	ENDIF
276
277	ENDIF
278
279	!
280	!-- 4D-array for storing the Rif-values at vertical walls
281	IF ( topography /= 'flat' ) THEN
282	ALLOCATE( rif_wall(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1,1:4) )
283	rif_wall = 0.0
284	ENDIF
285
286	!
287	!-- Velocities at nzb+1 needed for volume flow control
288	IF ( conserve_volume_flow ) THEN
289	ALLOCATE( u_nzb_p1_for_vfc(nys:nyn), v_nzb_p1_for_vfc(nxl:nxr) )
290	u_nzb_p1_for_vfc = 0.0
291	v_nzb_p1_for_vfc = 0.0
292	ENDIF
293
294	!
295	!-- Arrays to store velocity data from t-dt and the phase speeds which
296	!-- are needed for radiation boundary conditions
297	IF ( outflow_l ) THEN
298	ALLOCATE( u_m_l(nzb:nzt+1,nys-1:nyn+1,1:2), &
299	v_m_l(nzb:nzt+1,nys-1:nyn+1,0:1), &
300	w_m_l(nzb:nzt+1,nys-1:nyn+1,0:1) )
301	ENDIF
302	IF ( outflow_r ) THEN
303	ALLOCATE( u_m_r(nzb:nzt+1,nys-1:nyn+1,nx-1:nx), &
304	v_m_r(nzb:nzt+1,nys-1:nyn+1,nx-1:nx), &
305	w_m_r(nzb:nzt+1,nys-1:nyn+1,nx-1:nx) )
306	ENDIF
307	IF ( outflow_l .OR. outflow_r ) THEN
308	ALLOCATE( c_u(nzb:nzt+1,nys-1:nyn+1), c_v(nzb:nzt+1,nys-1:nyn+1), &
309	c_w(nzb:nzt+1,nys-1:nyn+1) )
310	ENDIF
311	IF ( outflow_s ) THEN
312	ALLOCATE( u_m_s(nzb:nzt+1,0:1,nxl-1:nxr+1), &
313	v_m_s(nzb:nzt+1,1:2,nxl-1:nxr+1), &
314	w_m_s(nzb:nzt+1,0:1,nxl-1:nxr+1) )
315	ENDIF
316	IF ( outflow_n ) THEN
317	ALLOCATE( u_m_n(nzb:nzt+1,ny-1:ny,nxl-1:nxr+1), &
318	v_m_n(nzb:nzt+1,ny-1:ny,nxl-1:nxr+1), &
319	w_m_n(nzb:nzt+1,ny-1:ny,nxl-1:nxr+1) )
320	ENDIF
321	IF ( outflow_s .OR. outflow_n ) THEN
322	ALLOCATE( c_u(nzb:nzt+1,nxl-1:nxr+1), c_v(nzb:nzt+1,nxl-1:nxr+1), &
323	c_w(nzb:nzt+1,nxl-1:nxr+1) )
324	ENDIF
325
326	!
327	!-- Initial assignment of the pointers
328	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
329
330	rif_m => rif_1; rif => rif_2
331	shf_m => shf_1; shf => shf_2
332	tswst_m => tswst_1; tswst => tswst_2
333	usws_m => usws_1; usws => usws_2
334	uswst_m => uswst_1; uswst => uswst_2
335	vsws_m => vsws_1; vsws => vsws_2
336	vswst_m => vswst_1; vswst => vswst_2
337	e_m => e_1; e => e_2; e_p => e_3; te_m => e_3
338	kh_m => kh_1; kh => kh_2
339	km_m => km_1; km => km_2
340	pt_m => pt_1; pt => pt_2; pt_p => pt_3; tpt_m => pt_3
341	u_m => u_1; u => u_2; u_p => u_3; tu_m => u_3
342	v_m => v_1; v => v_2; v_p => v_3; tv_m => v_3
343	w_m => w_1; w => w_2; w_p => w_3; tw_m => w_3
344
345	IF ( humidity .OR. passive_scalar ) THEN
346	qsws_m => qsws_1; qsws => qsws_2
347	qswst_m => qswst_1; qswst => qswst_2
348	q_m => q_1; q => q_2; q_p => q_3; tq_m => q_3
349	IF ( humidity ) vpt_m => vpt_1; vpt => vpt_2
350	IF ( cloud_physics ) ql => ql_1
351	IF ( cloud_droplets ) THEN
352	ql => ql_1
353	ql_c => ql_2
354	ENDIF
355	ENDIF
356
357	ELSE
358
359	rif => rif_1
360	shf => shf_1
361	tswst => tswst_1
362	usws => usws_1
363	uswst => uswst_1
364	vsws => vsws_1
365	vswst => vswst_1
366	e => e_1; e_p => e_2; te_m => e_3; e_m => e_3
367	kh => kh_1
368	km => km_1
369	pt => pt_1; pt_p => pt_2; tpt_m => pt_3; pt_m => pt_3
370	u => u_1; u_p => u_2; tu_m => u_3; u_m => u_3
371	v => v_1; v_p => v_2; tv_m => v_3; v_m => v_3
372	w => w_1; w_p => w_2; tw_m => w_3; w_m => w_3
373
374	IF ( humidity .OR. passive_scalar ) THEN
375	qsws => qsws_1
376	qswst => qswst_1
377	q => q_1; q_p => q_2; tq_m => q_3; q_m => q_3
378	IF ( humidity ) vpt => vpt_1
379	IF ( cloud_physics ) ql => ql_1
380	IF ( cloud_droplets ) THEN
381	ql => ql_1
382	ql_c => ql_2
383	ENDIF
384	ENDIF
385
386	IF ( ocean ) THEN
387	saswsb => saswsb_1
388	saswst => saswst_1
389	sa => sa_1; sa_p => sa_2; tsa_m => sa_3
390	ENDIF
391
392	ENDIF
393
394	!
395	!-- Initialize model variables
396	IF ( TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
397	TRIM( initializing_actions ) /= 'read_data_for_recycling' ) THEN
398	!
399	!-- First model run of a possible job queue.
400	!-- Initial profiles of the variables must be computes.
401	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
402	!
403	!-- Use solutions of the 1D model as initial profiles,
404	!-- start 1D model
405	CALL init_1d_model
406	!
407	!-- Transfer initial profiles to the arrays of the 3D model
408	DO i = nxl-1, nxr+1
409	DO j = nys-1, nyn+1
410	e(:,j,i) = e1d
411	kh(:,j,i) = kh1d
412	km(:,j,i) = km1d
413	pt(:,j,i) = pt_init
414	u(:,j,i) = u1d
415	v(:,j,i) = v1d
416	ENDDO
417	ENDDO
418
419	IF ( humidity .OR. passive_scalar ) THEN
420	DO i = nxl-1, nxr+1
421	DO j = nys-1, nyn+1
422	q(:,j,i) = q_init
423	ENDDO
424	ENDDO
425	ENDIF
426
427	IF ( .NOT. constant_diffusion ) THEN
428	DO i = nxl-1, nxr+1
429	DO j = nys-1, nyn+1
430	e(:,j,i) = e1d
431	ENDDO
432	ENDDO
433	!
434	!-- Store initial profiles for output purposes etc.
435	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
436
437	IF ( prandtl_layer ) THEN
438	rif = rif1d(nzb+1)
439	ts = 0.0 ! could actually be computed more accurately in the
440	! 1D model. Update when opportunity arises.
441	us = us1d
442	usws = usws1d
443	vsws = vsws1d
444	ELSE
445	ts = 0.0 ! must be set, because used in
446	rif = 0.0 ! flowste
447	us = 0.0
448	usws = 0.0
449	vsws = 0.0
450	ENDIF
451
452	ELSE
453	e = 0.0 ! must be set, because used in
454	rif = 0.0 ! flowste
455	ts = 0.0
456	us = 0.0
457	usws = 0.0
458	vsws = 0.0
459	ENDIF
460	uswst = top_momentumflux_u
461	vswst = top_momentumflux_v
462
463	!
464	!-- In every case qs = 0.0 (see also pt)
465	!-- This could actually be computed more accurately in the 1D model.
466	!-- Update when opportunity arises!
467	IF ( humidity .OR. passive_scalar ) qs = 0.0
468
469	!
470	!-- inside buildings set velocities back to zero
471	IF ( topography /= 'flat' ) THEN
472	DO i = nxl-1, nxr+1
473	DO j = nys-1, nyn+1
474	u(nzb:nzb_u_inner(j,i),j,i) = 0.0
475	v(nzb:nzb_v_inner(j,i),j,i) = 0.0
476	ENDDO
477	ENDDO
478	IF ( conserve_volume_flow ) THEN
479	IF ( nxr == nx ) THEN
480	DO j = nys, nyn
481	DO k = nzb + 1, nzb_u_inner(j,nx)
482	u_nzb_p1_for_vfc(j) = u1d(k) * dzu(k)
483	ENDDO
484	ENDDO
485	ENDIF
486	IF ( nyn == ny ) THEN
487	DO i = nxl, nxr
488	DO k = nzb + 1, nzb_v_inner(ny,i)
489	v_nzb_p1_for_vfc(i) = v1d(k) * dzu(k)
490	ENDDO
491	ENDDO
492	ENDIF
493	ENDIF
494	!
495	!-- WARNING: The extra boundary conditions set after running the
496	!-- ------- 1D model impose an error on the divergence one layer
497	!-- below the topography; need to correct later
498	!-- ATTENTION: Provisional correction for Piacsek & Williams
499	!-- --------- advection scheme: keep u and v zero one layer below
500	!-- the topography.
501	IF ( ibc_uv_b == 0 ) THEN
502	!
503	!-- Satisfying the Dirichlet condition with an extra layer below
504	!-- the surface where the u and v component change their sign.
505	DO i = nxl-1, nxr+1
506	DO j = nys-1, nyn+1
507	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = -u(1,j,i)
508	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = -v(1,j,i)
509	ENDDO
510	ENDDO
511
512	ELSE
513	!
514	!-- Neumann condition
515	DO i = nxl-1, nxr+1
516	DO j = nys-1, nyn+1
517	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
518	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
519	ENDDO
520	ENDDO
521
522	ENDIF
523
524	ENDIF
525
526	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
527	THEN
528	!
529	!-- Use constructed initial profiles (velocity constant with height,
530	!-- temperature profile with constant gradient)
531	DO i = nxl-1, nxr+1
532	DO j = nys-1, nyn+1
533	pt(:,j,i) = pt_init
534	u(:,j,i) = u_init
535	v(:,j,i) = v_init
536	ENDDO
537	ENDDO
538
539	!
540	!-- Set initial horizontal velocities at the lowest computational grid levels
541	!-- to zero in order to avoid too small time steps caused by the diffusion
542	!-- limit in the initial phase of a run (at k=1, dz/2 occurs in the
543	!-- limiting formula!). The original values are stored to be later used for
544	!-- volume flow control.
545	DO i = nxl-1, nxr+1
546	DO j = nys-1, nyn+1
547	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0
548	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0
549	ENDDO
550	ENDDO
551	IF ( conserve_volume_flow ) THEN
552	IF ( nxr == nx ) THEN
553	DO j = nys, nyn
554	DO k = nzb + 1, nzb_u_inner(j,nx) + 1
555	u_nzb_p1_for_vfc(j) = u_init(k) * dzu(k)
556	ENDDO
557	ENDDO
558	ENDIF
559	IF ( nyn == ny ) THEN
560	DO i = nxl, nxr
561	DO k = nzb + 1, nzb_v_inner(ny,i) + 1
562	v_nzb_p1_for_vfc(i) = v_init(k) * dzu(k)
563	ENDDO
564	ENDDO
565	ENDIF
566	ENDIF
567
568	IF ( humidity .OR. passive_scalar ) THEN
569	DO i = nxl-1, nxr+1
570	DO j = nys-1, nyn+1
571	q(:,j,i) = q_init
572	ENDDO
573	ENDDO
574	ENDIF
575
576	IF ( ocean ) THEN
577	DO i = nxl-1, nxr+1
578	DO j = nys-1, nyn+1
579	sa(:,j,i) = sa_init
580	ENDDO
581	ENDDO
582	ENDIF
583
584	IF ( constant_diffusion ) THEN
585	km = km_constant
586	kh = km / prandtl_number
587	e = 0.0
588	ELSEIF ( e_init > 0.0 ) THEN
589	DO k = nzb+1, nzt
590	km(k,:,:) = 0.1 * l_grid(k) * SQRT( e_init )
591	ENDDO
592	km(nzb,:,:) = km(nzb+1,:,:)
593	km(nzt+1,:,:) = km(nzt,:,:)
594	kh = km / prandtl_number
595	e = e_init
596	ELSE
597	IF ( .NOT. ocean ) THEN
598	kh = 0.01 ! there must exist an initial diffusion, because
599	km = 0.01 ! otherwise no TKE would be produced by the
600	! production terms, as long as not yet
601	! e = (u/cm)*2 at k=nzb+1
602	ELSE
603	kh = 0.00001
604	km = 0.00001
605	ENDIF
606	e = 0.0
607	ENDIF
608	rif = 0.0
609	ts = 0.0
610	us = 0.0
611	usws = 0.0
612	uswst = top_momentumflux_u
613	vsws = 0.0
614	vswst = top_momentumflux_v
615	IF ( humidity .OR. passive_scalar ) qs = 0.0
616
617	!
618	!-- Compute initial temperature field and other constants used in case
619	!-- of a sloping surface
620	IF ( sloping_surface ) CALL init_slope
621
622	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
623	THEN
624	!
625	!-- Initialization will completely be done by the user
626	CALL user_init_3d_model
627
628	ENDIF
629
630	!
631	!-- Apply channel flow boundary condition
632	IF ( TRIM( bc_uv_t ) == 'dirichlet_0' ) THEN
633
634	u(nzt+1,:,:) = 0.0
635	v(nzt+1,:,:) = 0.0
636
637	!-- For the Dirichlet condition to be correctly applied at the top, set
638	!-- ug and vg to zero there
639	ug(nzt+1) = 0.0
640	vg(nzt+1) = 0.0
641
642	ENDIF
643
644	!
645	!-- Calculate virtual potential temperature
646	IF ( humidity ) vpt = pt * ( 1.0 + 0.61 * q )
647
648	!
649	!-- Store initial profiles for output purposes etc.
650	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
651	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
652	IF ( ibc_uv_b == 0 ) THEN
653	hom(nzb,1,5,:) = -hom(nzb+1,1,5,:) ! due to satisfying the Dirichlet
654	hom(nzb,1,6,:) = -hom(nzb+1,1,6,:) ! condition with an extra layer
655	! below the surface where the u and v component change their sign
656	ENDIF
657	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
658	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
659	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
660
661	IF ( ocean ) THEN
662	!
663	!-- Store initial salinity profile
664	hom(:,1,26,:) = SPREAD( sa(:,nys,nxl), 2, statistic_regions+1 )
665	ENDIF
666
667	IF ( humidity ) THEN
668	!
669	!-- Store initial profile of total water content, virtual potential
670	!-- temperature
671	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
672	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
673	IF ( cloud_physics .OR. cloud_droplets ) THEN
674	!
675	!-- Store initial profile of specific humidity and potential
676	!-- temperature
677	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
678	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
679	ENDIF
680	ENDIF
681
682	IF ( passive_scalar ) THEN
683	!
684	!-- Store initial scalar profile
685	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
686	ENDIF
687
688	!
689	!-- Initialize fluxes at bottom surface
690	IF ( use_surface_fluxes ) THEN
691
692	IF ( constant_heatflux ) THEN
693	!
694	!-- Heat flux is prescribed
695	IF ( random_heatflux ) THEN
696	CALL disturb_heatflux
697	ELSE
698	shf = surface_heatflux
699	!
700	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
701	IF ( TRIM( topography ) /= 'flat' ) THEN
702	DO i = nxl-1, nxr+1
703	DO j = nys-1, nyn+1
704	IF ( nzb_s_inner(j,i) /= 0 ) THEN
705	shf(j,i) = wall_heatflux(0)
706	ENDIF
707	ENDDO
708	ENDDO
709	ENDIF
710	ENDIF
711	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
712	ENDIF
713
714	!
715	!-- Determine the near-surface water flux
716	IF ( humidity .OR. passive_scalar ) THEN
717	IF ( constant_waterflux ) THEN
718	qsws = surface_waterflux
719	IF ( ASSOCIATED( qsws_m ) ) qsws_m = qsws
720	ENDIF
721	ENDIF
722
723	ENDIF
724
725	!
726	!-- Initialize fluxes at top surface
727	!-- Currently, only the heatflux and salinity flux can be prescribed.
728	!-- The latent flux is zero in this case!
729	IF ( use_top_fluxes ) THEN
730
731	IF ( constant_top_heatflux ) THEN
732	!
733	!-- Heat flux is prescribed
734	tswst = top_heatflux
735	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
736
737	IF ( humidity .OR. passive_scalar ) THEN
738	qswst = 0.0
739	IF ( ASSOCIATED( qswst_m ) ) qswst_m = qswst
740	ENDIF
741
742	IF ( ocean ) THEN
743	saswsb = bottom_salinityflux
744	saswst = top_salinityflux
745	ENDIF
746	ENDIF
747
748	!
749	!-- Initialization in case of a coupled model run
750	IF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
751	tswst = 0.0
752	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
753	ENDIF
754
755	ENDIF
756
757	!
758	!-- Initialize Prandtl layer quantities
759	IF ( prandtl_layer ) THEN
760
761	z0 = roughness_length
762
763	IF ( .NOT. constant_heatflux ) THEN
764	!
765	!-- Surface temperature is prescribed. Here the heat flux cannot be
766	!-- simply estimated, because therefore rif, u* and theta* would have
767	!-- to be computed by iteration. This is why the heat flux is assumed
768	!-- to be zero before the first time step. It approaches its correct
769	!-- value in the course of the first few time steps.
770	shf = 0.0
771	IF ( ASSOCIATED( shf_m ) ) shf_m = 0.0
772	ENDIF
773
774	IF ( humidity .OR. passive_scalar ) THEN
775	IF ( .NOT. constant_waterflux ) THEN
776	qsws = 0.0
777	IF ( ASSOCIATED( qsws_m ) ) qsws_m = 0.0
778	ENDIF
779	ENDIF
780
781	ENDIF
782
783	!
784	!-- Calculate the initial volume flow at the right and north boundary
785	IF ( conserve_volume_flow ) THEN
786
787	volume_flow_initial_l = 0.0
788	volume_flow_area_l = 0.0
789
790	IF ( nxr == nx ) THEN
791	DO j = nys, nyn
792	DO k = nzb_2d(j,nx) + 1, nzt
793	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
794	u(k,j,nx) * dzu(k)
795	volume_flow_area_l(1) = volume_flow_area_l(1) + dzu(k)
796	ENDDO
797	!
798	!-- Correction if velocity at nzb+1 has been set zero further above
799	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
800	u_nzb_p1_for_vfc(j)
801	ENDDO
802	ENDIF
803
804	IF ( nyn == ny ) THEN
805	DO i = nxl, nxr
806	DO k = nzb_2d(ny,i) + 1, nzt
807	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
808	v(k,ny,i) * dzu(k)
809	volume_flow_area_l(2) = volume_flow_area_l(2) + dzu(k)
810	ENDDO
811	!
812	!-- Correction if velocity at nzb+1 has been set zero further above
813	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
814	v_nzb_p1_for_vfc(i)
815	ENDDO
816	ENDIF
817
818	#if defined( __parallel )
819	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
820	2, MPI_REAL, MPI_SUM, comm2d, ierr )
821	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
822	2, MPI_REAL, MPI_SUM, comm2d, ierr )
823	#else
824	volume_flow_initial = volume_flow_initial_l
825	volume_flow_area = volume_flow_area_l
826	#endif
827	!
828	!-- In case of 'bulk_velocity' mode, volume_flow_initial is overridden
829	!-- and calculated from u\|v_bulk instead.
830	IF ( TRIM( conserve_volume_flow_mode ) == 'bulk_velocity' ) THEN
831	volume_flow_initial(1) = u_bulk * volume_flow_area(1)
832	volume_flow_initial(2) = v_bulk * volume_flow_area(2)
833	ENDIF
834
835	ENDIF
836
837	!
838	!-- For the moment, perturbation pressure and vertical velocity are zero
839	p = 0.0; w = 0.0
840
841	!
842	!-- Initialize array sums (must be defined in first call of pres)
843	sums = 0.0
844
845	!
846	!-- Treating cloud physics, liquid water content and precipitation amount
847	!-- are zero at beginning of the simulation
848	IF ( cloud_physics ) THEN
849	ql = 0.0
850	IF ( precipitation ) precipitation_amount = 0.0
851	ENDIF
852
853	!
854	!-- Impose vortex with vertical axis on the initial velocity profile
855	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
856	CALL init_rankine
857	ENDIF
858
859	!
860	!-- Impose temperature anomaly (advection test only)
861	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
862	CALL init_pt_anomaly
863	ENDIF
864
865	!
866	!-- If required, change the surface temperature at the start of the 3D run
867	IF ( pt_surface_initial_change /= 0.0 ) THEN
868	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
869	ENDIF
870
871	!
872	!-- If required, change the surface humidity/scalar at the start of the 3D
873	!-- run
874	IF ( ( humidity .OR. passive_scalar ) .AND. &
875	q_surface_initial_change /= 0.0 ) THEN
876	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
877	ENDIF
878
879	!
880	!-- Initialize the random number generator (from numerical recipes)
881	CALL random_function_ini
882
883	!
884	!-- Impose random perturbation on the horizontal velocity field and then
885	!-- remove the divergences from the velocity field
886	IF ( create_disturbances ) THEN
887	CALL disturb_field( nzb_u_inner, tend, u )
888	CALL disturb_field( nzb_v_inner, tend, v )
889	n_sor = nsor_ini
890	CALL pres
891	n_sor = nsor
892	ENDIF
893
894	!
895	!-- Once again set the perturbation pressure explicitly to zero in order to
896	!-- assure that it does not generate any divergences in the first time step.
897	!-- At t=0 the velocity field is free of divergence (as constructed above).
898	!-- Divergences being created during a time step are not yet known and thus
899	!-- cannot be corrected during the time step yet.
900	p = 0.0
901
902	!
903	!-- Initialize old and new time levels.
904	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
905	e_m = e; pt_m = pt; u_m = u; v_m = v; w_m = w; kh_m = kh; km_m = km
906	ELSE
907	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
908	ENDIF
909	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
910
911	IF ( humidity .OR. passive_scalar ) THEN
912	IF ( ASSOCIATED( q_m ) ) q_m = q
913	IF ( timestep_scheme(1:5) == 'runge' ) tq_m = 0.0
914	q_p = q
915	IF ( humidity .AND. ASSOCIATED( vpt_m ) ) vpt_m = vpt
916	ENDIF
917
918	IF ( ocean ) THEN
919	tsa_m = 0.0
920	sa_p = sa
921	ENDIF
922
923
924	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' .OR. &
925	TRIM( initializing_actions ) == 'read_data_for_recycling' ) &
926	THEN
927	!
928	!-- When reading data for initializing the recycling method, first read
929	!-- some of the global variables from restart file
930	IF ( TRIM( initializing_actions ) == 'read_data_for_recycling' ) THEN
931
932	WRITE (9,*) 'before read_parts_of_var_list'
933	CALL local_flush( 9 )
934	CALL read_parts_of_var_list
935	WRITE (9,*) 'after read_parts_of_var_list'
936	CALL local_flush( 9 )
937	CALL close_file( 13 )
938	!
939	!-- Store temporally and horizontally averaged vertical profiles to be
940	!-- used as mean inflow profiles
941	ALLOCATE( mean_inflow_profiles(nzb:nzt+1,5) )
942
943	mean_inflow_profiles(:,1) = hom_sum(:,1,0) ! u
944	mean_inflow_profiles(:,2) = hom_sum(:,2,0) ! v
945	mean_inflow_profiles(:,4) = hom_sum(:,4,0) ! pt
946	mean_inflow_profiles(:,5) = hom_sum(:,8,0) ! e
947
948	!
949	!-- Use these mean profiles for the inflow (provided that Dirichlet
950	!-- conditions are used)
951	IF ( inflow_l ) THEN
952	DO j = nys-1, nyn+1
953	DO k = nzb, nzt+1
954	u(k,j,-1) = mean_inflow_profiles(k,1)
955	v(k,j,-1) = mean_inflow_profiles(k,2)
956	w(k,j,-1) = 0.0
957	pt(k,j,-1) = mean_inflow_profiles(k,4)
958	e(k,j,-1) = mean_inflow_profiles(k,5)
959	ENDDO
960	ENDDO
961	ENDIF
962
963	!
964	!-- Calculate the damping factors to be used at the inflow. For a
965	!-- turbulent inflow the turbulent fluctuations have to be limited
966	!-- vertically because otherwise the turbulent inflow layer will grow
967	!-- in time.
968	IF ( inflow_damping_height == 9999999.9 ) THEN
969	!
970	!-- Default: use the inversion height calculated by the prerun
971	inflow_damping_height = hom_sum(nzb+6,pr_palm,0)
972
973	ENDIF
974
975	IF ( inflow_damping_width == 9999999.9 ) THEN
976	!
977	!-- Default for the transition range: one tenth of the undamped layer
978	inflow_damping_width = 0.1 * inflow_damping_height
979
980	ENDIF
981
982	ALLOCATE( inflow_damping_factor(nzb:nzt+1) )
983
984	DO k = nzb, nzt+1
985
986	IF ( zu(k) <= inflow_damping_height ) THEN
987	inflow_damping_factor(k) = 1.0
988	ELSEIF ( zu(k) <= inflow_damping_height + inflow_damping_width ) &
989	THEN
990	inflow_damping_factor(k) = 1.0 - &
991	( zu(k) - inflow_damping_height ) / &
992	inflow_damping_width
993	ELSE
994	inflow_damping_factor(k) = 0.0
995	ENDIF
996
997	ENDDO
998
999	ENDIF
1000
1001	!
1002	!-- Read binary data from restart file
1003	WRITE (9,*) 'before read_3d_binary'
1004	CALL local_flush( 9 )
1005	CALL read_3d_binary
1006	WRITE (9,*) 'after read_3d_binary'
1007	CALL local_flush( 9 )
1008
1009	!
1010	!-- Calculate the initial volume flow at the right and north boundary
1011	IF ( conserve_volume_flow .AND. &
1012	TRIM( initializing_actions ) == 'read_data_for_recycling' ) THEN
1013
1014	volume_flow_initial_l = 0.0
1015	volume_flow_area_l = 0.0
1016
1017	IF ( nxr == nx ) THEN
1018	DO j = nys, nyn
1019	DO k = nzb_2d(j,nx) + 1, nzt
1020	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1021	u(k,j,nx) * dzu(k)
1022	volume_flow_area_l(1) = volume_flow_area_l(1) + dzu(k)
1023	ENDDO
1024	!
1025	!-- Correction if velocity at nzb+1 has been set zero further above
1026	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1027	u_nzb_p1_for_vfc(j)
1028	ENDDO
1029	ENDIF
1030
1031	IF ( nyn == ny ) THEN
1032	DO i = nxl, nxr
1033	DO k = nzb_2d(ny,i) + 1, nzt
1034	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1035	v(k,ny,i) * dzu(k)
1036	volume_flow_area_l(2) = volume_flow_area_l(2) + dzu(k)
1037	ENDDO
1038	!
1039	!-- Correction if velocity at nzb+1 has been set zero further above
1040	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1041	v_nzb_p1_for_vfc(i)
1042	ENDDO
1043	ENDIF
1044
1045	#if defined( __parallel )
1046	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1047	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1048	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1049	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1050	#else
1051	volume_flow_initial = volume_flow_initial_l
1052	volume_flow_area = volume_flow_area_l
1053	#endif
1054	ENDIF
1055
1056
1057	!
1058	!-- Calculate initial temperature field and other constants used in case
1059	!-- of a sloping surface
1060	IF ( sloping_surface ) CALL init_slope
1061
1062	!
1063	!-- Initialize new time levels (only done in order to set boundary values
1064	!-- including ghost points)
1065	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
1066	IF ( humidity .OR. passive_scalar ) q_p = q
1067	IF ( ocean ) sa_p = sa
1068
1069	!
1070	!-- Allthough tendency arrays are set in prognostic_equations, they have
1071	!-- have to be predefined here because they are used (but multiplied with 0)
1072	!-- there before they are set.
1073	IF ( timestep_scheme(1:5) == 'runge' ) THEN
1074	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
1075	IF ( humidity .OR. passive_scalar ) tq_m = 0.0
1076	IF ( ocean ) tsa_m = 0.0
1077	ENDIF
1078
1079	ELSE
1080	!
1081	!-- Actually this part of the programm should not be reached
1082	message_string = 'unknown initializing problem'
1083	CALL message( 'init_3d_model', 'PA0193', 1, 2, 0, 6, 0 )
1084	ENDIF
1085
1086
1087	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1088	!
1089	!-- Initialize old timelevels needed for radiation boundary conditions
1090	IF ( outflow_l ) THEN
1091	u_m_l(:,:,:) = u(:,:,1:2)
1092	v_m_l(:,:,:) = v(:,:,0:1)
1093	w_m_l(:,:,:) = w(:,:,0:1)
1094	ENDIF
1095	IF ( outflow_r ) THEN
1096	u_m_r(:,:,:) = u(:,:,nx-1:nx)
1097	v_m_r(:,:,:) = v(:,:,nx-1:nx)
1098	w_m_r(:,:,:) = w(:,:,nx-1:nx)
1099	ENDIF
1100	IF ( outflow_s ) THEN
1101	u_m_s(:,:,:) = u(:,0:1,:)
1102	v_m_s(:,:,:) = v(:,1:2,:)
1103	w_m_s(:,:,:) = w(:,0:1,:)
1104	ENDIF
1105	IF ( outflow_n ) THEN
1106	u_m_n(:,:,:) = u(:,ny-1:ny,:)
1107	v_m_n(:,:,:) = v(:,ny-1:ny,:)
1108	w_m_n(:,:,:) = w(:,ny-1:ny,:)
1109	ENDIF
1110
1111	ENDIF
1112
1113	!
1114	!-- Initialization of the leaf area density
1115	IF ( plant_canopy ) THEN
1116
1117	SELECT CASE ( TRIM( canopy_mode ) )
1118
1119	CASE( 'block' )
1120
1121	DO i = nxl-1, nxr+1
1122	DO j = nys-1, nyn+1
1123	lad_s(:,j,i) = lad(:)
1124	cdc(:,j,i) = drag_coefficient
1125	IF ( passive_scalar ) THEN
1126	sls(:,j,i) = leaf_surface_concentration
1127	sec(:,j,i) = scalar_exchange_coefficient
1128	ENDIF
1129	ENDDO
1130	ENDDO
1131
1132	CASE DEFAULT
1133
1134	!
1135	!-- The DEFAULT case is reached either if the parameter
1136	!-- canopy mode contains a wrong character string or if the
1137	!-- user has coded a special case in the user interface.
1138	!-- There, the subroutine user_init_plant_canopy checks
1139	!-- which of these two conditions applies.
1140	CALL user_init_plant_canopy
1141
1142	END SELECT
1143
1144	CALL exchange_horiz( lad_s )
1145	CALL exchange_horiz( cdc )
1146
1147	IF ( passive_scalar ) THEN
1148	CALL exchange_horiz( sls )
1149	CALL exchange_horiz( sec )
1150	ENDIF
1151
1152	!
1153	!-- Sharp boundaries of the plant canopy in horizontal directions
1154	!-- In vertical direction the interpolation is retained, as the leaf
1155	!-- area density is initialised by prescribing a vertical profile
1156	!-- consisting of piecewise linear segments. The upper boundary
1157	!-- of the plant canopy is now defined by lad_w(pch_index,:,:) = 0.0.
1158
1159	DO i = nxl, nxr
1160	DO j = nys, nyn
1161	DO k = nzb, nzt+1
1162	IF ( lad_s(k,j,i) > 0.0 ) THEN
1163	lad_u(k,j,i) = lad_s(k,j,i)
1164	lad_u(k,j,i+1) = lad_s(k,j,i)
1165	lad_v(k,j,i) = lad_s(k,j,i)
1166	lad_v(k,j+1,i) = lad_s(k,j,i)
1167	ENDIF
1168	ENDDO
1169	DO k = nzb, nzt
1170	lad_w(k,j,i) = 0.5 * ( lad_s(k+1,j,i) + lad_s(k,j,i) )
1171	ENDDO
1172	ENDDO
1173	ENDDO
1174
1175	lad_w(pch_index,:,:) = 0.0
1176	lad_w(nzt+1,:,:) = lad_w(nzt,:,:)
1177
1178	CALL exchange_horiz( lad_u )
1179	CALL exchange_horiz( lad_v )
1180	CALL exchange_horiz( lad_w )
1181
1182	!
1183	!-- Initialisation of the canopy heat source distribution
1184	IF ( cthf /= 0.0 ) THEN
1185	!
1186	!-- Piecewise evaluation of the leaf area index by
1187	!-- integration of the leaf area density
1188	lai(:,:,:) = 0.0
1189	DO i = nxl-1, nxr+1
1190	DO j = nys-1, nyn+1
1191	DO k = pch_index-1, 0, -1
1192	lai(k,j,i) = lai(k+1,j,i) + &
1193	( 0.5 * ( lad_w(k+1,j,i) + &
1194	lad_s(k+1,j,i) ) * &
1195	( zw(k+1) - zu(k+1) ) ) + &
1196	( 0.5 * ( lad_w(k,j,i) + &
1197	lad_s(k+1,j,i) ) * &
1198	( zu(k+1) - zw(k) ) )
1199	ENDDO
1200	ENDDO
1201	ENDDO
1202
1203	!
1204	!-- Evaluation of the upward kinematic vertical heat flux within the
1205	!-- canopy
1206	DO i = nxl-1, nxr+1
1207	DO j = nys-1, nyn+1
1208	DO k = 0, pch_index
1209	canopy_heat_flux(k,j,i) = cthf * &
1210	exp( -0.6 * lai(k,j,i) )
1211	ENDDO
1212	ENDDO
1213	ENDDO
1214
1215	!
1216	!-- The near surface heat flux is derived from the heat flux
1217	!-- distribution within the canopy
1218	shf(:,:) = canopy_heat_flux(0,:,:)
1219
1220	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
1221
1222	ENDIF
1223
1224	ENDIF
1225
1226	!
1227	!-- If required, initialize dvrp-software
1228	IF ( dt_dvrp /= 9999999.9 ) CALL init_dvrp
1229
1230	IF ( ocean ) THEN
1231	!
1232	!-- Initialize quantities needed for the ocean model
1233	CALL init_ocean
1234	ELSE
1235	!
1236	!-- Initialize quantities for handling cloud physics
1237	!-- This routine must be called before init_particles, because
1238	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
1239	!-- init_particles) is not defined.
1240	CALL init_cloud_physics
1241	ENDIF
1242
1243	!
1244	!-- If required, initialize particles
1245	IF ( particle_advection ) CALL init_particles
1246
1247	!
1248	!-- Initialize quantities for special advections schemes
1249	CALL init_advec
1250
1251	!
1252	!-- Initialize Rayleigh damping factors
1253	rdf = 0.0
1254	IF ( rayleigh_damping_factor /= 0.0 ) THEN
1255	IF ( .NOT. ocean ) THEN
1256	DO k = nzb+1, nzt
1257	IF ( zu(k) >= rayleigh_damping_height ) THEN
1258	rdf(k) = rayleigh_damping_factor * &
1259	( SIN( pi * 0.5 * ( zu(k) - rayleigh_damping_height ) &
1260	/ ( zu(nzt) - rayleigh_damping_height ) )&
1261	)**2
1262	ENDIF
1263	ENDDO
1264	ELSE
1265	DO k = nzt, nzb+1, -1
1266	IF ( zu(k) <= rayleigh_damping_height ) THEN
1267	rdf(k) = rayleigh_damping_factor * &
1268	( SIN( pi * 0.5 * ( rayleigh_damping_height - zu(k) ) &
1269	/ ( rayleigh_damping_height - zu(nzb+1)))&
1270	)**2
1271	ENDIF
1272	ENDDO
1273	ENDIF
1274	ENDIF
1275
1276	!
1277	!-- Initialize the starting level and the vertical smoothing factor used for
1278	!-- the external pressure gradient
1279	dp_smooth_factor = 1.0
1280	IF ( dp_external ) THEN
1281	!
1282	!-- Set the starting level dp_level_ind_b only if it has not been set before
1283	!-- (e.g. in init_grid).
1284	IF ( dp_level_ind_b == 0 ) THEN
1285	ind_array = MINLOC( ABS( dp_level_b - zu ) )
1286	dp_level_ind_b = ind_array(1) - 1 + nzb
1287	! MINLOC uses lower array bound 1
1288	ENDIF
1289	IF ( dp_smooth ) THEN
1290	dp_smooth_factor(:dp_level_ind_b) = 0.0
1291	DO k = dp_level_ind_b+1, nzt
1292	dp_smooth_factor(k) = 0.5 * ( 1.0 + SIN( pi * &
1293	( REAL( k - dp_level_ind_b ) / &
1294	REAL( nzt - dp_level_ind_b ) - 0.5 ) ) )
1295	ENDDO
1296	ENDIF
1297	ENDIF
1298
1299	!
1300	!-- Initialize diffusivities used within the outflow damping layer in case of
1301	!-- non-cyclic lateral boundaries. A linear increase is assumed over the first
1302	!-- half of the width of the damping layer
1303	IF ( bc_lr == 'dirichlet/radiation' ) THEN
1304
1305	DO i = nxl-1, nxr+1
1306	IF ( i >= nx - outflow_damping_width ) THEN
1307	km_damp_x(i) = km_damp_max * MIN( 1.0, &
1308	( i - ( nx - outflow_damping_width ) ) / &
1309	REAL( outflow_damping_width/2 ) &
1310	)
1311	ELSE
1312	km_damp_x(i) = 0.0
1313	ENDIF
1314	ENDDO
1315
1316	ELSEIF ( bc_lr == 'radiation/dirichlet' ) THEN
1317
1318	DO i = nxl-1, nxr+1
1319	IF ( i <= outflow_damping_width ) THEN
1320	km_damp_x(i) = km_damp_max * MIN( 1.0, &
1321	( outflow_damping_width - i ) / &
1322	REAL( outflow_damping_width/2 ) &
1323	)
1324	ELSE
1325	km_damp_x(i) = 0.0
1326	ENDIF
1327	ENDDO
1328
1329	ENDIF
1330
1331	IF ( bc_ns == 'dirichlet/radiation' ) THEN
1332
1333	DO j = nys-1, nyn+1
1334	IF ( j >= ny - outflow_damping_width ) THEN
1335	km_damp_y(j) = km_damp_max * MIN( 1.0, &
1336	( j - ( ny - outflow_damping_width ) ) / &
1337	REAL( outflow_damping_width/2 ) &
1338	)
1339	ELSE
1340	km_damp_y(j) = 0.0
1341	ENDIF
1342	ENDDO
1343
1344	ELSEIF ( bc_ns == 'radiation/dirichlet' ) THEN
1345
1346	DO j = nys-1, nyn+1
1347	IF ( j <= outflow_damping_width ) THEN
1348	km_damp_y(j) = km_damp_max * MIN( 1.0, &
1349	( outflow_damping_width - j ) / &
1350	REAL( outflow_damping_width/2 ) &
1351	)
1352	ELSE
1353	km_damp_y(j) = 0.0
1354	ENDIF
1355	ENDDO
1356
1357	ENDIF
1358
1359	!
1360	!-- Initialize local summation arrays for UP flow_statistics. This is necessary
1361	!-- because they may not yet have been initialized when they are called from
1362	!-- flow_statistics (or - depending on the chosen model run - are never
1363	!-- initialized)
1364	sums_divnew_l = 0.0
1365	sums_divold_l = 0.0
1366	sums_l_l = 0.0
1367	sums_up_fraction_l = 0.0
1368	sums_wsts_bc_l = 0.0
1369
1370	!
1371	!-- Pre-set masks for regional statistics. Default is the total model domain.
1372	rmask = 1.0
1373
1374	!
1375	!-- User-defined initializing actions. Check afterwards, if maximum number
1376	!-- of allowed timeseries is not exceeded
1377	CALL user_init
1378
1379	IF ( dots_num > dots_max ) THEN
1380	WRITE( message_string, * ) 'number of time series quantities exceeds', &
1381	' its maximum of dots_max = ', dots_max, &
1382	' &Please increase dots_max in modules.f90.'
1383	CALL message( 'init_3d_model', 'PA0194', 1, 2, 0, 6, 0 )
1384	ENDIF
1385
1386	!
1387	!-- Input binary data file is not needed anymore. This line must be placed
1388	!-- after call of user_init!
1389	CALL close_file( 13 )
1390
1391	!
1392	!-- Compute total sum of active mask grid points
1393	!-- ngp_2dh: number of grid points of a horizontal cross section through the
1394	!-- total domain
1395	!-- ngp_3d: number of grid points of the total domain
1396	ngp_2dh_outer_l = 0
1397	ngp_2dh_outer = 0
1398	ngp_2dh_s_inner_l = 0
1399	ngp_2dh_s_inner = 0
1400	ngp_2dh_l = 0
1401	ngp_2dh = 0
1402	ngp_3d_inner_l = 0
1403	ngp_3d_inner = 0
1404	ngp_3d = 0
1405	ngp_sums = ( nz + 2 ) * ( pr_palm + max_pr_user )
1406
1407	DO sr = 0, statistic_regions
1408	DO i = nxl, nxr
1409	DO j = nys, nyn
1410	IF ( rmask(j,i,sr) == 1.0 ) THEN
1411	!
1412	!-- All xy-grid points
1413	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
1414	!
1415	!-- xy-grid points above topography
1416	DO k = nzb_s_outer(j,i), nz + 1
1417	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
1418	ENDDO
1419	DO k = nzb_s_inner(j,i), nz + 1
1420	ngp_2dh_s_inner_l(k,sr) = ngp_2dh_s_inner_l(k,sr) + 1
1421	ENDDO
1422	!
1423	!-- All grid points of the total domain above topography
1424	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
1425	( nz - nzb_s_inner(j,i) + 2 )
1426	ENDIF
1427	ENDDO
1428	ENDDO
1429	ENDDO
1430
1431	sr = statistic_regions + 1
1432	#if defined( __parallel )
1433	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
1434	comm2d, ierr )
1435	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
1436	MPI_INTEGER, MPI_SUM, comm2d, ierr )
1437	CALL MPI_ALLREDUCE( ngp_2dh_s_inner_l(0,0), ngp_2dh_s_inner(0,0), &
1438	(nz+2)*sr, MPI_INTEGER, MPI_SUM, comm2d, ierr )
1439	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner(0), sr, MPI_INTEGER, &
1440	MPI_SUM, comm2d, ierr )
1441	#else
1442	ngp_2dh = ngp_2dh_l
1443	ngp_2dh_outer = ngp_2dh_outer_l
1444	ngp_2dh_s_inner = ngp_2dh_s_inner_l
1445	ngp_3d_inner = ngp_3d_inner_l
1446	#endif
1447
1448	ngp_3d = ngp_2dh * ( nz + 2 )
1449
1450	!
1451	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
1452	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
1453	!-- the respective subdomain lie below the surface topography
1454	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
1455	ngp_3d_inner = MAX( 1, ngp_3d_inner(:) )
1456
1457	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l )
1458
1459
1460	END SUBROUTINE init_3d_model

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