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source: palm/trunk/SOURCE/init_3d_model.f90 @ 234

Last change on this file since 234 was 198, checked in by raasch, 16 years ago
file headers updated for the next release 3.5
Property svn:keywords set to `Id`
File size: 49.1 KB

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

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