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source: palm/trunk/SOURCE/init_3d_model.f90 @ 193

Last change on this file since 193 was 181, checked in by raasch, 16 years ago
bugfixes + adjustments for SGI ICE system
Property svn:keywords set to `Id`
File size: 49.1 KB

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

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