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source: palm/trunk/SOURCE/init_3d_model.f90 @ 680

Last change on this file since 680 was 680, checked in by gryschka, 13 years ago
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1	#if defined( __ibmy_special )
2	@PROCESS NOOPTimize
3	#endif
4	SUBROUTINE init_3d_model
5
6	!------------------------------------------------------------------------------!
7	! Current revisions:
8	! -----------------
9	!
10	! gryschka
11	! bugfix: volume_flow_control
12	!
13	! Former revisions:
14	! -----------------
15	! $Id: init_3d_model.f90 680 2011-02-04 23:16:06Z gryschka $
16	!
17	! 673 2011-01-18 16:19:48Z suehring
18	! weight_substep (moved from advec_ws) and weight_pres added.
19	! Allocate p_sub when using Multigrid or SOR solver.
20	! Call of ws_init moved behind the if requests.
21	!
22	! 667 2010-12-23 12:06:00Z suehring/gryschka
23	! nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng in loops and
24	! allocation of arrays. Calls of exchange_horiz are modified.
25	! Call ws_init to initialize arrays needed for statistical evaluation and
26	! optimization when ws-scheme is used.
27	! Initial volume flow is now calculated by using the variable hom_sum.
28	! Therefore the correction of initial volume flow for non-flat topography
29	! removed (removed u_nzb_p1_for_vfc and v_nzb_p1_for_vfc)
30	! Changed surface boundary conditions for u and v in case of ibc_uv_b == 0 from
31	! mirror bc to dirichlet boundary conditions (u=v=0), so that k=nzb is
32	! representative for the height z0
33	! Bugfix: type conversion of '1' to 64bit for the MAX function (ngp_3d_inner)
34	!
35	! 622 2010-12-10 08:08:13Z raasch
36	! optional barriers included in order to speed up collective operations
37	!
38	! 560 2010-09-09 10:06:09Z weinreis
39	! bugfix: correction of calculating ngp_3d for 64 bit
40	!
41	! 485 2010-02-05 10:57:51Z raasch
42	! calculation of ngp_3d + ngp_3d_inner changed because they have now 64 bit
43	!
44	! 407 2009-12-01 15:01:15Z maronga
45	! var_ts is replaced by dots_max
46	! Enabled passive scalar/humidity wall fluxes for non-flat topography
47	!
48	! 388 2009-09-23 09:40:33Z raasch
49	! Initialization of prho added.
50	! bugfix: correction of initial volume flow for non-flat topography
51	! bugfix: zero initialization of arrays within buildings for 'cyclic_fill'
52	! bugfix: avoid that ngp_2dh_s_inner becomes zero
53	! initializing_actions='read_data_for_recycling' renamed to 'cyclic_fill', now
54	! independent of turbulent_inflow
55	! Output of messages replaced by message handling routine.
56	! Set the starting level and the vertical smoothing factor used for
57	! the external pressure gradient
58	! +conserve_volume_flow_mode: 'default', 'initial_profiles', 'inflow_profile'
59	! and 'bulk_velocity'
60	! If the inversion height calculated by the prerun is zero,
61	! inflow_damping_height must be explicitly specified.
62	!
63	! 181 2008-07-30 07:07:47Z raasch
64	! bugfix: zero assignments to tendency arrays in case of restarts,
65	! further extensions and modifications in the initialisation of the plant
66	! canopy model,
67	! allocation of hom_sum moved to parin, initialization of spectrum_x\|y directly
68	! after allocating theses arrays,
69	! read data for recycling added as new initialization option,
70	! dummy allocation for diss
71	!
72	! 138 2007-11-28 10:03:58Z letzel
73	! New counter ngp_2dh_s_inner.
74	! Allow new case bc_uv_t = 'dirichlet_0' for channel flow.
75	! Corrected calculation of initial volume flow for 'set_1d-model_profiles' and
76	! 'set_constant_profiles' in case of buildings in the reference cross-sections.
77	!
78	! 108 2007-08-24 15:10:38Z letzel
79	! Flux initialization in case of coupled runs, +momentum fluxes at top boundary,
80	! +arrays for phase speed c_u, c_v, c_w, indices for u\|v\|w_m_l\|r changed
81	! +qswst_remote in case of atmosphere model with humidity coupled to ocean
82	! Rayleigh damping for ocean, optionally calculate km and kh from initial
83	! TKE e_init
84	!
85	! 97 2007-06-21 08:23:15Z raasch
86	! Initialization of salinity, call of init_ocean
87	!
88	! 87 2007-05-22 15:46:47Z raasch
89	! var_hom and var_sum renamed pr_palm
90	!
91	! 75 2007-03-22 09:54:05Z raasch
92	! Arrays for radiation boundary conditions are allocated (u_m_l, u_m_r, etc.),
93	! bugfix for cases with the outflow damping layer extending over more than one
94	! subdomain, moisture renamed humidity,
95	! new initializing action "by_user" calls user_init_3d_model,
96	! precipitation_amount/rate, ts_value are allocated, +module netcdf_control,
97	! initial velocities at nzb+1 are regarded for volume
98	! flow control in case they have been set zero before (to avoid small timesteps)
99	! -uvmean_outflow, uxrp, vynp eliminated
100	!
101	! 19 2007-02-23 04:53:48Z raasch
102	! +handling of top fluxes
103	!
104	! RCS Log replace by Id keyword, revision history cleaned up
105	!
106	! Revision 1.49 2006/08/22 15:59:07 raasch
107	! No optimization of this file on the ibmy (Yonsei Univ.)
108	!
109	! Revision 1.1 1998/03/09 16:22:22 raasch
110	! Initial revision
111	!
112	!
113	! Description:
114	! ------------
115	! Allocation of arrays and initialization of the 3D model via
116	! a) pre-run the 1D model
117	! or
118	! b) pre-set constant linear profiles
119	! or
120	! c) read values of a previous run
121	!------------------------------------------------------------------------------!
122
123	USE advec_ws
124	USE arrays_3d
125	USE averaging
126	USE cloud_parameters
127	USE constants
128	USE control_parameters
129	USE cpulog
130	USE indices
131	USE interfaces
132	USE model_1d
133	USE netcdf_control
134	USE particle_attributes
135	USE pegrid
136	USE profil_parameter
137	USE random_function_mod
138	USE statistics
139
140	IMPLICIT NONE
141
142	INTEGER :: i, ind_array(1), j, k, sr
143
144	INTEGER, DIMENSION(:), ALLOCATABLE :: ngp_2dh_l
145
146	INTEGER, DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l, &
147	ngp_2dh_s_inner_l
148
149	REAL :: a, b
150
151	REAL, DIMENSION(1:2) :: volume_flow_area_l, volume_flow_initial_l
152
153	REAL, DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_l, ngp_3d_inner_tmp
154
155
156	!
157	!-- Allocate arrays
158	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
159	ngp_3d(0:statistic_regions), &
160	ngp_3d_inner(0:statistic_regions), &
161	ngp_3d_inner_l(0:statistic_regions), &
162	ngp_3d_inner_tmp(0:statistic_regions), &
163	sums_divnew_l(0:statistic_regions), &
164	sums_divold_l(0:statistic_regions) )
165	ALLOCATE( dp_smooth_factor(nzb:nzt), rdf(nzb+1:nzt) )
166	ALLOCATE( ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
167	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
168	ngp_2dh_s_inner(nzb:nzt+1,0:statistic_regions), &
169	ngp_2dh_s_inner_l(nzb:nzt+1,0:statistic_regions), &
170	rmask(nysg:nyng,nxlg:nxrg,0:statistic_regions), &
171	sums(nzb:nzt+1,pr_palm+max_pr_user), &
172	sums_l(nzb:nzt+1,pr_palm+max_pr_user,0:threads_per_task-1), &
173	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
174	sums_up_fraction_l(10,3,0:statistic_regions), &
175	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions), &
176	ts_value(dots_max,0:statistic_regions) )
177	ALLOCATE( km_damp_x(nxlg:nxrg), km_damp_y(nysg:nyng) )
178
179	ALLOCATE( rif_1(nysg:nyng,nxlg:nxrg), shf_1(nysg:nyng,nxlg:nxrg), &
180	ts(nysg:nyng,nxlg:nxrg), tswst_1(nysg:nyng,nxlg:nxrg), &
181	us(nysg:nyng,nxlg:nxrg), usws_1(nysg:nyng,nxlg:nxrg), &
182	uswst_1(nysg:nyng,nxlg:nxrg), &
183	vsws_1(nysg:nyng,nxlg:nxrg), &
184	vswst_1(nysg:nyng,nxlg:nxrg), z0(nysg:nyng,nxlg:nxrg) )
185
186	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
187	!
188	!-- Leapfrog scheme needs two timelevels of diffusion quantities
189	ALLOCATE( rif_2(nysg:nyng,nxlg:nxrg), &
190	shf_2(nysg:nyng,nxlg:nxrg), &
191	tswst_2(nysg:nyng,nxlg:nxrg), &
192	usws_2(nysg:nyng,nxlg:nxrg), &
193	uswst_2(nysg:nyng,nxlg:nxrg), &
194	vswst_2(nysg:nyng,nxlg:nxrg), &
195	vsws_2(nysg:nyng,nxlg:nxrg) )
196	ENDIF
197
198	ALLOCATE( d(nzb+1:nzta,nys:nyna,nxl:nxra), &
199	e_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
200	e_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
201	e_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
202	kh_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
203	km_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
204	p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
205	pt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
206	pt_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
207	pt_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
208	tend(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
209	u_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
210	u_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
211	u_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
212	v_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
213	v_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
214	v_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
215	w_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
216	w_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
217	w_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
218	!
219	!-- Following array is required to buffer the perturbation pressure during
220	!-- Runge-Kutta 3rd order time integration.
221	IF ( psolver == 'multigrid' .OR. psolver == 'sor' ) THEN
222	ALLOCATE( p_sub(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
223	ENDIF
224
225	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
226	ALLOCATE( kh_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
227	km_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
228	ENDIF
229
230	IF ( humidity .OR. passive_scalar ) THEN
231	!
232	!-- 2D-humidity/scalar arrays
233	ALLOCATE ( qs(nysg:nyng,nxlg:nxrg), &
234	qsws_1(nysg:nyng,nxlg:nxrg), &
235	qswst_1(nysg:nyng,nxlg:nxrg) )
236
237	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
238	ALLOCATE( qsws_2(nysg:nyng,nxlg:nxrg), &
239	qswst_2(nysg:nyng,nxlg:nxrg) )
240	ENDIF
241	!
242	!-- 3D-humidity/scalar arrays
243	ALLOCATE( q_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
244	q_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
245	q_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
246
247	!
248	!-- 3D-arrays needed for humidity only
249	IF ( humidity ) THEN
250	ALLOCATE( vpt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
251
252	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
253	ALLOCATE( vpt_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
254	ENDIF
255
256	IF ( cloud_physics ) THEN
257	!
258	!-- Liquid water content
259	ALLOCATE ( ql_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
260	!
261	!-- Precipitation amount and rate (only needed if output is switched)
262	ALLOCATE( precipitation_amount(nysg:nyng,nxlg:nxrg), &
263	precipitation_rate(nysg:nyng,nxlg:nxrg) )
264	ENDIF
265
266	IF ( cloud_droplets ) THEN
267	!
268	!-- Liquid water content, change in liquid water content,
269	!-- real volume of particles (with weighting), volume of particles
270	ALLOCATE ( ql_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
271	ql_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
272	ql_v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
273	ql_vp(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
274	ENDIF
275
276	ENDIF
277
278	ENDIF
279
280	IF ( ocean ) THEN
281	ALLOCATE( saswsb_1(nysg:nyng,nxlg:nxrg), &
282	saswst_1(nysg:nyng,nxlg:nxrg) )
283	ALLOCATE( prho_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
284	rho_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
285	sa_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
286	sa_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
287	sa_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
288	prho => prho_1
289	rho => rho_1 ! routines calc_mean_profile and diffusion_e require
290	! density to be apointer
291	IF ( humidity_remote ) THEN
292	ALLOCATE( qswst_remote(nysg:nyng,nxlg:nxrg))
293	qswst_remote = 0.0
294	ENDIF
295	ENDIF
296
297	!
298	!-- 3D-array for storing the dissipation, needed for calculating the sgs
299	!-- particle velocities
300	IF ( use_sgs_for_particles ) THEN
301	ALLOCATE ( diss(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
302	ELSE
303	ALLOCATE ( diss(2,2,2) ) ! required because diss is used as a
304	! formal parameter
305	ENDIF
306
307	IF ( dt_dosp /= 9999999.9 ) THEN
308	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
309	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
310	spectrum_x = 0.0
311	spectrum_y = 0.0
312	ENDIF
313
314	!
315	!-- 3D-arrays for the leaf area density and the canopy drag coefficient
316	IF ( plant_canopy ) THEN
317	ALLOCATE ( lad_s(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
318	lad_u(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
319	lad_v(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
320	lad_w(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
321	cdc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
322
323	IF ( passive_scalar ) THEN
324	ALLOCATE ( sls(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
325	sec(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
326	ENDIF
327
328	IF ( cthf /= 0.0 ) THEN
329	ALLOCATE ( lai(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
330	canopy_heat_flux(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
331	ENDIF
332
333	ENDIF
334
335	!
336	!-- 4D-array for storing the Rif-values at vertical walls
337	IF ( topography /= 'flat' ) THEN
338	ALLOCATE( rif_wall(nzb:nzt+1,nysg:nyng,nxlg:nxrg,1:4) )
339	rif_wall = 0.0
340	ENDIF
341
342	!
343	!-- Arrays to store velocity data from t-dt and the phase speeds which
344	!-- are needed for radiation boundary conditions
345	IF ( outflow_l ) THEN
346	ALLOCATE( u_m_l(nzb:nzt+1,nysg:nyng,1:2), &
347	v_m_l(nzb:nzt+1,nysg:nyng,0:1), &
348	w_m_l(nzb:nzt+1,nysg:nyng,0:1) )
349	ENDIF
350	IF ( outflow_r ) THEN
351	ALLOCATE( u_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx), &
352	v_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx), &
353	w_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx) )
354	ENDIF
355	IF ( outflow_l .OR. outflow_r ) THEN
356	ALLOCATE( c_u(nzb:nzt+1,nysg:nyng), c_v(nzb:nzt+1,nysg:nyng), &
357	c_w(nzb:nzt+1,nysg:nyng) )
358	ENDIF
359	IF ( outflow_s ) THEN
360	ALLOCATE( u_m_s(nzb:nzt+1,0:1,nxlg:nxrg), &
361	v_m_s(nzb:nzt+1,1:2,nxlg:nxrg), &
362	w_m_s(nzb:nzt+1,0:1,nxlg:nxrg) )
363	ENDIF
364	IF ( outflow_n ) THEN
365	ALLOCATE( u_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg), &
366	v_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg), &
367	w_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg) )
368	ENDIF
369	IF ( outflow_s .OR. outflow_n ) THEN
370	ALLOCATE( c_u(nzb:nzt+1,nxlg:nxrg), c_v(nzb:nzt+1,nxlg:nxrg), &
371	c_w(nzb:nzt+1,nxlg:nxrg) )
372	ENDIF
373
374	!
375	!-- Initial assignment of the pointers
376	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
377
378	rif_m => rif_1; rif => rif_2
379	shf_m => shf_1; shf => shf_2
380	tswst_m => tswst_1; tswst => tswst_2
381	usws_m => usws_1; usws => usws_2
382	uswst_m => uswst_1; uswst => uswst_2
383	vsws_m => vsws_1; vsws => vsws_2
384	vswst_m => vswst_1; vswst => vswst_2
385	e_m => e_1; e => e_2; e_p => e_3; te_m => e_3
386	kh_m => kh_1; kh => kh_2
387	km_m => km_1; km => km_2
388	pt_m => pt_1; pt => pt_2; pt_p => pt_3; tpt_m => pt_3
389	u_m => u_1; u => u_2; u_p => u_3; tu_m => u_3
390	v_m => v_1; v => v_2; v_p => v_3; tv_m => v_3
391	w_m => w_1; w => w_2; w_p => w_3; tw_m => w_3
392
393	IF ( humidity .OR. passive_scalar ) THEN
394	qsws_m => qsws_1; qsws => qsws_2
395	qswst_m => qswst_1; qswst => qswst_2
396	q_m => q_1; q => q_2; q_p => q_3; tq_m => q_3
397	IF ( humidity ) vpt_m => vpt_1; vpt => vpt_2
398	IF ( cloud_physics ) ql => ql_1
399	IF ( cloud_droplets ) THEN
400	ql => ql_1
401	ql_c => ql_2
402	ENDIF
403	ENDIF
404
405	ELSE
406
407	rif => rif_1
408	shf => shf_1
409	tswst => tswst_1
410	usws => usws_1
411	uswst => uswst_1
412	vsws => vsws_1
413	vswst => vswst_1
414	e => e_1; e_p => e_2; te_m => e_3; e_m => e_3
415	kh => kh_1
416	km => km_1
417	pt => pt_1; pt_p => pt_2; tpt_m => pt_3; pt_m => pt_3
418	u => u_1; u_p => u_2; tu_m => u_3; u_m => u_3
419	v => v_1; v_p => v_2; tv_m => v_3; v_m => v_3
420	w => w_1; w_p => w_2; tw_m => w_3; w_m => w_3
421
422	IF ( humidity .OR. passive_scalar ) THEN
423	qsws => qsws_1
424	qswst => qswst_1
425	q => q_1; q_p => q_2; tq_m => q_3; q_m => q_3
426	IF ( humidity ) vpt => vpt_1
427	IF ( cloud_physics ) ql => ql_1
428	IF ( cloud_droplets ) THEN
429	ql => ql_1
430	ql_c => ql_2
431	ENDIF
432	ENDIF
433
434	IF ( ocean ) THEN
435	saswsb => saswsb_1
436	saswst => saswst_1
437	sa => sa_1; sa_p => sa_2; tsa_m => sa_3
438	ENDIF
439
440	ENDIF
441
442	!
443	!-- Allocate arrays containing the RK coefficient for right evaluation of
444	!-- perturbation pressure and turbulent fluxes. At this point it is needed
445	!-- for right pressure correction during initialization. Further below
446	!-- the real values will be set.
447	ALLOCATE (weight_substep(1:intermediate_timestep_count_max), &
448	weight_pres(1:intermediate_timestep_count_max) )
449	weight_substep = 1.
450	weight_pres = 1.
451	intermediate_timestep_count = 1 ! needed for simulated_time=0
452
453	!
454	!-- Initialize model variables
455	IF ( TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
456	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
457	!
458	!-- First model run of a possible job queue.
459	!-- Initial profiles of the variables must be computes.
460	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
461	!
462	!-- Use solutions of the 1D model as initial profiles,
463	!-- start 1D model
464	CALL init_1d_model
465	!
466	!-- Transfer initial profiles to the arrays of the 3D model
467	DO i = nxlg, nxrg
468	DO j = nysg, nyng
469	e(:,j,i) = e1d
470	kh(:,j,i) = kh1d
471	km(:,j,i) = km1d
472	pt(:,j,i) = pt_init
473	u(:,j,i) = u1d
474	v(:,j,i) = v1d
475	ENDDO
476	ENDDO
477
478	IF ( humidity .OR. passive_scalar ) THEN
479	DO i = nxlg, nxrg
480	DO j = nysg, nyng
481	q(:,j,i) = q_init
482	ENDDO
483	ENDDO
484	ENDIF
485
486	IF ( .NOT. constant_diffusion ) THEN
487	DO i = nxlg, nxrg
488	DO j = nysg, nyng
489	e(:,j,i) = e1d
490	ENDDO
491	ENDDO
492	!
493	!-- Store initial profiles for output purposes etc.
494	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
495
496	IF ( prandtl_layer ) THEN
497	rif = rif1d(nzb+1)
498	ts = 0.0 ! could actually be computed more accurately in the
499	! 1D model. Update when opportunity arises.
500	us = us1d
501	usws = usws1d
502	vsws = vsws1d
503	ELSE
504	ts = 0.0 ! must be set, because used in
505	rif = 0.0 ! flowste
506	us = 0.0
507	usws = 0.0
508	vsws = 0.0
509	ENDIF
510
511	ELSE
512	e = 0.0 ! must be set, because used in
513	rif = 0.0 ! flowste
514	ts = 0.0
515	us = 0.0
516	usws = 0.0
517	vsws = 0.0
518	ENDIF
519	uswst = top_momentumflux_u
520	vswst = top_momentumflux_v
521
522	!
523	!-- In every case qs = 0.0 (see also pt)
524	!-- This could actually be computed more accurately in the 1D model.
525	!-- Update when opportunity arises!
526	IF ( humidity .OR. passive_scalar ) qs = 0.0
527
528	!
529	!-- inside buildings set velocities back to zero
530	IF ( topography /= 'flat' ) THEN
531	DO i = nxl-1, nxr+1
532	DO j = nys-1, nyn+1
533	u(nzb:nzb_u_inner(j,i),j,i) = 0.0
534	v(nzb:nzb_v_inner(j,i),j,i) = 0.0
535	ENDDO
536	ENDDO
537
538	!
539	!-- WARNING: The extra boundary conditions set after running the
540	!-- ------- 1D model impose an error on the divergence one layer
541	!-- below the topography; need to correct later
542	!-- ATTENTION: Provisional correction for Piacsek & Williams
543	!-- --------- advection scheme: keep u and v zero one layer below
544	!-- the topography.
545	!
546	!-- Following was removed, because mirror boundary condition are
547	!-- replaced by dirichlet boundary conditions
548	!
549	! IF ( ibc_uv_b == 0 ) THEN
550	!!
551	!!-- Satisfying the Dirichlet condition with an extra layer below
552	!!-- the surface where the u and v component change their sign.
553	! DO i = nxl-1, nxr+1
554	! DO j = nys-1, nyn+1
555	! IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = -u(1,j,i)
556	! IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = -v(1,j,i)
557	! ENDDO
558	! ENDDO
559	!
560	! ELSE
561	IF ( ibc_uv_b == 1 ) THEN
562	!
563	!-- Neumann condition
564	DO i = nxl-1, nxr+1
565	DO j = nys-1, nyn+1
566	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
567	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
568	ENDDO
569	ENDDO
570
571	ENDIF
572
573	ENDIF
574
575	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
576	THEN
577	!
578	!-- Use constructed initial profiles (velocity constant with height,
579	!-- temperature profile with constant gradient)
580	DO i = nxlg, nxrg
581	DO j = nysg, nyng
582	pt(:,j,i) = pt_init
583	u(:,j,i) = u_init
584	v(:,j,i) = v_init
585	ENDDO
586	ENDDO
587
588	!
589	!-- Set initial horizontal velocities at the lowest computational grid
590	!-- levels to zero in order to avoid too small time steps caused by the
591	!-- diffusion limit in the initial phase of a run (at k=1, dz/2 occurs
592	!-- in the limiting formula!). The original values are stored to be later
593	!-- used for volume flow control.
594	DO i = nxlg, nxrg
595	DO j = nysg, nyng
596	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0
597	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0
598	ENDDO
599	ENDDO
600
601	IF ( humidity .OR. passive_scalar ) THEN
602	DO i = nxlg, nxrg
603	DO j = nysg, nyng
604	q(:,j,i) = q_init
605	ENDDO
606	ENDDO
607	ENDIF
608
609	IF ( ocean ) THEN
610	DO i = nxlg, nxrg
611	DO j = nysg, nyng
612	sa(:,j,i) = sa_init
613	ENDDO
614	ENDDO
615	ENDIF
616
617	IF ( constant_diffusion ) THEN
618	km = km_constant
619	kh = km / prandtl_number
620	e = 0.0
621	ELSEIF ( e_init > 0.0 ) THEN
622	DO k = nzb+1, nzt
623	km(k,:,:) = 0.1 * l_grid(k) * SQRT( e_init )
624	ENDDO
625	km(nzb,:,:) = km(nzb+1,:,:)
626	km(nzt+1,:,:) = km(nzt,:,:)
627	kh = km / prandtl_number
628	e = e_init
629	ELSE
630	IF ( .NOT. ocean ) THEN
631	kh = 0.01 ! there must exist an initial diffusion, because
632	km = 0.01 ! otherwise no TKE would be produced by the
633	! production terms, as long as not yet
634	! e = (u/cm)*2 at k=nzb+1
635	ELSE
636	kh = 0.00001
637	km = 0.00001
638	ENDIF
639	e = 0.0
640	ENDIF
641	rif = 0.0
642	ts = 0.0
643	us = 0.0
644	usws = 0.0
645	uswst = top_momentumflux_u
646	vsws = 0.0
647	vswst = top_momentumflux_v
648	IF ( humidity .OR. passive_scalar ) qs = 0.0
649
650	!
651	!-- Compute initial temperature field and other constants used in case
652	!-- of a sloping surface
653	IF ( sloping_surface ) CALL init_slope
654
655	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
656	THEN
657	!
658	!-- Initialization will completely be done by the user
659	CALL user_init_3d_model
660
661	ENDIF
662	!
663	!-- Bottom boundary
664	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2 ) THEN
665	u(nzb,:,:) = 0.0
666	v(nzb,:,:) = 0.0
667	ENDIF
668
669	!
670	!-- Apply channel flow boundary condition
671	IF ( TRIM( bc_uv_t ) == 'dirichlet_0' ) THEN
672
673	u(nzt+1,:,:) = 0.0
674	v(nzt+1,:,:) = 0.0
675
676	!-- For the Dirichlet condition to be correctly applied at the top, set
677	!-- ug and vg to zero there
678	ug(nzt+1) = 0.0
679	vg(nzt+1) = 0.0
680
681	ENDIF
682
683	!
684	!-- Calculate virtual potential temperature
685	IF ( humidity ) vpt = pt * ( 1.0 + 0.61 * q )
686
687	!
688	!-- Store initial profiles for output purposes etc.
689	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
690	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
691	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2) THEN
692	hom(nzb,1,5,:) = 0.0
693	hom(nzb,1,6,:) = 0.0
694	ENDIF
695	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
696	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
697	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
698
699	IF ( ocean ) THEN
700	!
701	!-- Store initial salinity profile
702	hom(:,1,26,:) = SPREAD( sa(:,nys,nxl), 2, statistic_regions+1 )
703	ENDIF
704
705	IF ( humidity ) THEN
706	!
707	!-- Store initial profile of total water content, virtual potential
708	!-- temperature
709	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
710	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
711	IF ( cloud_physics .OR. cloud_droplets ) THEN
712	!
713	!-- Store initial profile of specific humidity and potential
714	!-- temperature
715	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
716	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
717	ENDIF
718	ENDIF
719
720	IF ( passive_scalar ) THEN
721	!
722	!-- Store initial scalar profile
723	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
724	ENDIF
725
726	!
727	!-- Initialize fluxes at bottom surface
728	IF ( use_surface_fluxes ) THEN
729
730	IF ( constant_heatflux ) THEN
731	!
732	!-- Heat flux is prescribed
733	IF ( random_heatflux ) THEN
734	CALL disturb_heatflux
735	ELSE
736	shf = surface_heatflux
737	!
738	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
739	IF ( TRIM( topography ) /= 'flat' ) THEN
740	DO i = nxlg, nxrg
741	DO j = nysg, nyng
742	IF ( nzb_s_inner(j,i) /= 0 ) THEN
743	shf(j,i) = wall_heatflux(0)
744	ENDIF
745	ENDDO
746	ENDDO
747	ENDIF
748	ENDIF
749	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
750	ENDIF
751
752	!
753	!-- Determine the near-surface water flux
754	IF ( humidity .OR. passive_scalar ) THEN
755	IF ( constant_waterflux ) THEN
756	qsws = surface_waterflux
757	!
758	!-- Over topography surface_waterflux is replaced by
759	!-- wall_humidityflux(0)
760	IF ( TRIM( topography ) /= 'flat' ) THEN
761	wall_qflux = wall_humidityflux
762	DO i = nxlg, nxrg
763	DO j = nysg, nyng
764	IF ( nzb_s_inner(j,i) /= 0 ) THEN
765	qsws(j,i) = wall_qflux(0)
766	ENDIF
767	ENDDO
768	ENDDO
769	ENDIF
770	IF ( ASSOCIATED( qsws_m ) ) qsws_m = qsws
771	ENDIF
772	ENDIF
773
774	ENDIF
775
776	!
777	!-- Initialize fluxes at top surface
778	!-- Currently, only the heatflux and salinity flux can be prescribed.
779	!-- The latent flux is zero in this case!
780	IF ( use_top_fluxes ) THEN
781
782	IF ( constant_top_heatflux ) THEN
783	!
784	!-- Heat flux is prescribed
785	tswst = top_heatflux
786	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
787
788	IF ( humidity .OR. passive_scalar ) THEN
789	qswst = 0.0
790	IF ( ASSOCIATED( qswst_m ) ) qswst_m = qswst
791	ENDIF
792
793	IF ( ocean ) THEN
794	saswsb = bottom_salinityflux
795	saswst = top_salinityflux
796	ENDIF
797	ENDIF
798
799	!
800	!-- Initialization in case of a coupled model run
801	IF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
802	tswst = 0.0
803	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
804	ENDIF
805
806	ENDIF
807
808	!
809	!-- Initialize Prandtl layer quantities
810	IF ( prandtl_layer ) THEN
811
812	z0 = roughness_length
813
814	IF ( .NOT. constant_heatflux ) THEN
815	!
816	!-- Surface temperature is prescribed. Here the heat flux cannot be
817	!-- simply estimated, because therefore rif, u* and theta* would have
818	!-- to be computed by iteration. This is why the heat flux is assumed
819	!-- to be zero before the first time step. It approaches its correct
820	!-- value in the course of the first few time steps.
821	shf = 0.0
822	IF ( ASSOCIATED( shf_m ) ) shf_m = 0.0
823	ENDIF
824
825	IF ( humidity .OR. passive_scalar ) THEN
826	IF ( .NOT. constant_waterflux ) THEN
827	qsws = 0.0
828	IF ( ASSOCIATED( qsws_m ) ) qsws_m = 0.0
829	ENDIF
830	ENDIF
831
832	ENDIF
833
834
835	!
836	!-- For the moment, perturbation pressure and vertical velocity are zero
837	p = 0.0; w = 0.0
838
839	!
840	!-- Initialize array sums (must be defined in first call of pres)
841	sums = 0.0
842
843	!
844	!-- Treating cloud physics, liquid water content and precipitation amount
845	!-- are zero at beginning of the simulation
846	IF ( cloud_physics ) THEN
847	ql = 0.0
848	IF ( precipitation ) precipitation_amount = 0.0
849	ENDIF
850
851	!
852	!-- Initialize quantities for special advections schemes
853	CALL init_advec
854
855	!
856	!-- Impose vortex with vertical axis on the initial velocity profile
857	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
858	CALL init_rankine
859	ENDIF
860
861	!
862	!-- Impose temperature anomaly (advection test only)
863	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
864	CALL init_pt_anomaly
865	ENDIF
866
867	!
868	!-- If required, change the surface temperature at the start of the 3D run
869	IF ( pt_surface_initial_change /= 0.0 ) THEN
870	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
871	ENDIF
872
873	!
874	!-- If required, change the surface humidity/scalar at the start of the 3D
875	!-- run
876	IF ( ( humidity .OR. passive_scalar ) .AND. &
877	q_surface_initial_change /= 0.0 ) THEN
878	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
879	ENDIF
880
881	!
882	!-- Initialize the random number generator (from numerical recipes)
883	CALL random_function_ini
884
885	!
886	!-- Once again set the perturbation pressure explicitly to zero in order to
887	!-- assure that it does not generate any divergences in the first time step.
888	!-- At t=0 the velocity field is free of divergence (as constructed above).
889	!-- Divergences being created during a time step are not yet known and thus
890	!-- cannot be corrected during the time step yet.
891	p = 0.0
892
893	!
894	!-- Initialize old and new time levels.
895	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
896	e_m = e; pt_m = pt; u_m = u; v_m = v; w_m = w; kh_m = kh; km_m = km
897	ELSE
898	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
899	ENDIF
900	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
901
902	IF ( humidity .OR. passive_scalar ) THEN
903	IF ( ASSOCIATED( q_m ) ) q_m = q
904	IF ( timestep_scheme(1:5) == 'runge' ) tq_m = 0.0
905	q_p = q
906	IF ( humidity .AND. ASSOCIATED( vpt_m ) ) vpt_m = vpt
907	ENDIF
908
909	IF ( ocean ) THEN
910	tsa_m = 0.0
911	sa_p = sa
912	ENDIF
913
914
915	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' .OR. &
916	TRIM( initializing_actions ) == 'cyclic_fill' ) &
917	THEN
918	!
919	!-- When reading data for cyclic fill of 3D prerun data, first read
920	!-- some of the global variables from restart file
921	IF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
922
923	CALL read_parts_of_var_list
924	CALL close_file( 13 )
925
926	!
927	!-- Initialization of the turbulence recycling method
928	IF ( turbulent_inflow ) THEN
929	!
930	!-- Store temporally and horizontally averaged vertical profiles to be
931	!-- used as mean inflow profiles
932	ALLOCATE( mean_inflow_profiles(nzb:nzt+1,5) )
933
934	mean_inflow_profiles(:,1) = hom_sum(:,1,0) ! u
935	mean_inflow_profiles(:,2) = hom_sum(:,2,0) ! v
936	mean_inflow_profiles(:,4) = hom_sum(:,4,0) ! pt
937	mean_inflow_profiles(:,5) = hom_sum(:,8,0) ! e
938
939	!
940	!-- Use these mean profiles for the inflow (provided that Dirichlet
941	!-- conditions are used)
942	IF ( inflow_l ) THEN
943	DO j = nysg, nyng
944	DO k = nzb, nzt+1
945	u(k,j,nxlg:-1) = mean_inflow_profiles(k,1)
946	v(k,j,nxlg:-1) = mean_inflow_profiles(k,2)
947	w(k,j,nxlg:-1) = 0.0
948	pt(k,j,nxlg:-1) = mean_inflow_profiles(k,4)
949	e(k,j,nxlg:-1) = mean_inflow_profiles(k,5)
950	ENDDO
951	ENDDO
952	ENDIF
953
954	!
955	!-- Calculate the damping factors to be used at the inflow. For a
956	!-- turbulent inflow the turbulent fluctuations have to be limited
957	!-- vertically because otherwise the turbulent inflow layer will grow
958	!-- in time.
959	IF ( inflow_damping_height == 9999999.9 ) THEN
960	!
961	!-- Default: use the inversion height calculated by the prerun; if
962	!-- this is zero, inflow_damping_height must be explicitly
963	!-- specified.
964	IF ( hom_sum(nzb+6,pr_palm,0) /= 0.0 ) THEN
965	inflow_damping_height = hom_sum(nzb+6,pr_palm,0)
966	ELSE
967	WRITE( message_string, * ) 'inflow_damping_height must be ',&
968	'explicitly specified because&the inversion height ', &
969	'calculated by the prerun is zero.'
970	CALL message( 'init_3d_model', 'PA0318', 1, 2, 0, 6, 0 )
971	ENDIF
972
973	ENDIF
974
975	IF ( inflow_damping_width == 9999999.9 ) THEN
976	!
977	!-- Default for the transition range: one tenth of the undamped
978	!-- layer
979	inflow_damping_width = 0.1 * inflow_damping_height
980
981	ENDIF
982
983	ALLOCATE( inflow_damping_factor(nzb:nzt+1) )
984
985	DO k = nzb, nzt+1
986
987	IF ( zu(k) <= inflow_damping_height ) THEN
988	inflow_damping_factor(k) = 1.0
989	ELSEIF ( zu(k) <= inflow_damping_height + &
990	inflow_damping_width ) THEN
991	inflow_damping_factor(k) = 1.0 - &
992	( zu(k) - inflow_damping_height ) / &
993	inflow_damping_width
994	ELSE
995	inflow_damping_factor(k) = 0.0
996	ENDIF
997
998	ENDDO
999	ENDIF
1000
1001	ENDIF
1002
1003	!
1004	!-- Read binary data from restart file
1005
1006	CALL read_3d_binary
1007
1008	!
1009	!-- Inside buildings set velocities and TKE back to zero
1010	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. &
1011	topography /= 'flat' ) THEN
1012	!
1013	!-- Inside buildings set velocities and TKE back to zero.
1014	!-- Other scalars (pt, q, s, km, kh, p, sa, ...) are ignored at present,
1015	!-- maybe revise later.
1016	IF ( timestep_scheme(1:5) == 'runge' ) THEN
1017	DO i = nxlg, nxrg
1018	DO j = nysg, nyng
1019	u (nzb:nzb_u_inner(j,i),j,i) = 0.0
1020	v (nzb:nzb_v_inner(j,i),j,i) = 0.0
1021	w (nzb:nzb_w_inner(j,i),j,i) = 0.0
1022	e (nzb:nzb_w_inner(j,i),j,i) = 0.0
1023	u_m(nzb:nzb_u_inner(j,i),j,i) = 0.0
1024	v_m(nzb:nzb_v_inner(j,i),j,i) = 0.0
1025	w_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1026	e_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1027	tu_m(nzb:nzb_u_inner(j,i),j,i) = 0.0
1028	tv_m(nzb:nzb_v_inner(j,i),j,i) = 0.0
1029	tw_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1030	te_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1031	tpt_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1032	ENDDO
1033	ENDDO
1034	ELSE
1035	DO i = nxlg, nxrg
1036	DO j = nysg, nyng
1037	u (nzb:nzb_u_inner(j,i),j,i) = 0.0
1038	v (nzb:nzb_v_inner(j,i),j,i) = 0.0
1039	w (nzb:nzb_w_inner(j,i),j,i) = 0.0
1040	e (nzb:nzb_w_inner(j,i),j,i) = 0.0
1041	u_m(nzb:nzb_u_inner(j,i),j,i) = 0.0
1042	v_m(nzb:nzb_v_inner(j,i),j,i) = 0.0
1043	w_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1044	e_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1045	u_p(nzb:nzb_u_inner(j,i),j,i) = 0.0
1046	v_p(nzb:nzb_v_inner(j,i),j,i) = 0.0
1047	w_p(nzb:nzb_w_inner(j,i),j,i) = 0.0
1048	e_p(nzb:nzb_w_inner(j,i),j,i) = 0.0
1049	ENDDO
1050	ENDDO
1051	ENDIF
1052
1053	ENDIF
1054
1055	!
1056	!-- Calculate initial temperature field and other constants used in case
1057	!-- of a sloping surface
1058	IF ( sloping_surface ) CALL init_slope
1059
1060	!
1061	!-- Initialize new time levels (only done in order to set boundary values
1062	!-- including ghost points)
1063	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
1064	IF ( humidity .OR. passive_scalar ) q_p = q
1065	IF ( ocean ) sa_p = sa
1066
1067	!
1068	!-- Allthough tendency arrays are set in prognostic_equations, they have
1069	!-- have to be predefined here because they are used (but multiplied with 0)
1070	!-- there before they are set.
1071	IF ( timestep_scheme(1:5) == 'runge' ) THEN
1072	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
1073	IF ( humidity .OR. passive_scalar ) tq_m = 0.0
1074	IF ( ocean ) tsa_m = 0.0
1075	ENDIF
1076
1077	ELSE
1078	!
1079	!-- Actually this part of the programm should not be reached
1080	message_string = 'unknown initializing problem'
1081	CALL message( 'init_3d_model', 'PA0193', 1, 2, 0, 6, 0 )
1082	ENDIF
1083
1084
1085	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1086	!
1087	!-- Initialize old timelevels needed for radiation boundary conditions
1088	IF ( outflow_l ) THEN
1089	u_m_l(:,:,:) = u(:,:,1:2)
1090	v_m_l(:,:,:) = v(:,:,0:1)
1091	w_m_l(:,:,:) = w(:,:,0:1)
1092	ENDIF
1093	IF ( outflow_r ) THEN
1094	u_m_r(:,:,:) = u(:,:,nx-1:nx)
1095	v_m_r(:,:,:) = v(:,:,nx-1:nx)
1096	w_m_r(:,:,:) = w(:,:,nx-1:nx)
1097	ENDIF
1098	IF ( outflow_s ) THEN
1099	u_m_s(:,:,:) = u(:,0:1,:)
1100	v_m_s(:,:,:) = v(:,1:2,:)
1101	w_m_s(:,:,:) = w(:,0:1,:)
1102	ENDIF
1103	IF ( outflow_n ) THEN
1104	u_m_n(:,:,:) = u(:,ny-1:ny,:)
1105	v_m_n(:,:,:) = v(:,ny-1:ny,:)
1106	w_m_n(:,:,:) = w(:,ny-1:ny,:)
1107	ENDIF
1108
1109	ENDIF
1110
1111	!
1112	!-- Calculate the initial volume flow at the right and north boundary
1113	IF ( conserve_volume_flow ) THEN
1114
1115	volume_flow_initial_l = 0.0
1116	volume_flow_area_l = 0.0
1117
1118	IF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1119
1120	IF ( nxr == nx ) THEN
1121	DO j = nys, nyn
1122	DO k = nzb_2d(j,nx) + 1, nzt
1123	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1124	hom_sum(k,1,0) * dzw(k)
1125	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1126	ENDDO
1127	ENDDO
1128	ENDIF
1129
1130	IF ( nyn == ny ) THEN
1131	DO i = nxl, nxr
1132	DO k = nzb_2d(ny,i) + 1, nzt
1133	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1134	hom_sum(k,2,0) * dzw(k)
1135	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1136	ENDDO
1137	ENDDO
1138	ENDIF
1139
1140	ELSEIF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1141
1142	IF ( nxr == nx ) THEN
1143	DO j = nys, nyn
1144	DO k = nzb_2d(j,nx) + 1, nzt
1145	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1146	u(k,j,nx) * dzw(k)
1147	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k)
1148	ENDDO
1149	ENDDO
1150	ENDIF
1151
1152	IF ( nyn == ny ) THEN
1153	DO i = nxl, nxr
1154	DO k = nzb_2d(ny,i) + 1, nzt
1155	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1156	v(k,ny,i) * dzw(k)
1157	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k)
1158	ENDDO
1159	ENDDO
1160	ENDIF
1161
1162	ENDIF
1163
1164	#if defined( __parallel )
1165	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1166	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1167	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1168	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1169
1170	#else
1171	volume_flow_initial = volume_flow_initial_l
1172	volume_flow_area = volume_flow_area_l
1173	#endif
1174
1175	!
1176	!-- In case of 'bulk_velocity' mode, volume_flow_initial is overridden
1177	!-- and calculated from u\|v_bulk instead.
1178	IF ( TRIM( conserve_volume_flow_mode ) == 'bulk_velocity' ) THEN
1179	volume_flow_initial(1) = u_bulk * volume_flow_area(1)
1180	volume_flow_initial(2) = v_bulk * volume_flow_area(2)
1181	ENDIF
1182
1183	ENDIF
1184
1185
1186	!
1187	!-- Impose random perturbation on the horizontal velocity field and then
1188	!-- remove the divergences from the velocity field at the initial stage
1189	IF ( create_disturbances .AND. &
1190	TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
1191	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
1192
1193	CALL disturb_field( nzb_u_inner, tend, u )
1194	CALL disturb_field( nzb_v_inner, tend, v )
1195	n_sor = nsor_ini
1196	CALL pres
1197	n_sor = nsor
1198	ENDIF
1199
1200	!
1201	!-- Initialization of the leaf area density
1202	IF ( plant_canopy ) THEN
1203
1204	SELECT CASE ( TRIM( canopy_mode ) )
1205
1206	CASE( 'block' )
1207
1208	DO i = nxlg, nxrg
1209	DO j = nysg, nyng
1210	lad_s(:,j,i) = lad(:)
1211	cdc(:,j,i) = drag_coefficient
1212	IF ( passive_scalar ) THEN
1213	sls(:,j,i) = leaf_surface_concentration
1214	sec(:,j,i) = scalar_exchange_coefficient
1215	ENDIF
1216	ENDDO
1217	ENDDO
1218
1219	CASE DEFAULT
1220
1221	!
1222	!-- The DEFAULT case is reached either if the parameter
1223	!-- canopy mode contains a wrong character string or if the
1224	!-- user has coded a special case in the user interface.
1225	!-- There, the subroutine user_init_plant_canopy checks
1226	!-- which of these two conditions applies.
1227	CALL user_init_plant_canopy
1228
1229	END SELECT
1230
1231	CALL exchange_horiz( lad_s, nbgp )
1232	CALL exchange_horiz( cdc, nbgp )
1233
1234	IF ( passive_scalar ) THEN
1235	CALL exchange_horiz( sls, nbgp )
1236	CALL exchange_horiz( sec, nbgp )
1237	ENDIF
1238
1239	!
1240	!-- Sharp boundaries of the plant canopy in horizontal directions
1241	!-- In vertical direction the interpolation is retained, as the leaf
1242	!-- area density is initialised by prescribing a vertical profile
1243	!-- consisting of piecewise linear segments. The upper boundary
1244	!-- of the plant canopy is now defined by lad_w(pch_index,:,:) = 0.0.
1245
1246	DO i = nxl, nxr
1247	DO j = nys, nyn
1248	DO k = nzb, nzt+1
1249	IF ( lad_s(k,j,i) > 0.0 ) THEN
1250	lad_u(k,j,i) = lad_s(k,j,i)
1251	lad_u(k,j,i+1) = lad_s(k,j,i)
1252	lad_v(k,j,i) = lad_s(k,j,i)
1253	lad_v(k,j+1,i) = lad_s(k,j,i)
1254	ENDIF
1255	ENDDO
1256	DO k = nzb, nzt
1257	lad_w(k,j,i) = 0.5 * ( lad_s(k+1,j,i) + lad_s(k,j,i) )
1258	ENDDO
1259	ENDDO
1260	ENDDO
1261
1262	lad_w(pch_index,:,:) = 0.0
1263	lad_w(nzt+1,:,:) = lad_w(nzt,:,:)
1264
1265	CALL exchange_horiz( lad_u, nbgp )
1266	CALL exchange_horiz( lad_v, nbgp )
1267	CALL exchange_horiz( lad_w, nbgp )
1268
1269	!
1270	!-- Initialisation of the canopy heat source distribution
1271	IF ( cthf /= 0.0 ) THEN
1272	!
1273	!-- Piecewise evaluation of the leaf area index by
1274	!-- integration of the leaf area density
1275	lai(:,:,:) = 0.0
1276	DO i = nxlg, nxrg
1277	DO j = nysg, nyng
1278	DO k = pch_index-1, 0, -1
1279	lai(k,j,i) = lai(k+1,j,i) + &
1280	( 0.5 * ( lad_w(k+1,j,i) + &
1281	lad_s(k+1,j,i) ) * &
1282	( zw(k+1) - zu(k+1) ) ) + &
1283	( 0.5 * ( lad_w(k,j,i) + &
1284	lad_s(k+1,j,i) ) * &
1285	( zu(k+1) - zw(k) ) )
1286	ENDDO
1287	ENDDO
1288	ENDDO
1289
1290	!
1291	!-- Evaluation of the upward kinematic vertical heat flux within the
1292	!-- canopy
1293	DO i = nxlg, nxrg
1294	DO j = nysg, nyng
1295	DO k = 0, pch_index
1296	canopy_heat_flux(k,j,i) = cthf * &
1297	exp( -0.6 * lai(k,j,i) )
1298	ENDDO
1299	ENDDO
1300	ENDDO
1301
1302	!
1303	!-- The near surface heat flux is derived from the heat flux
1304	!-- distribution within the canopy
1305	shf(:,:) = canopy_heat_flux(0,:,:)
1306
1307	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
1308
1309	ENDIF
1310
1311	ENDIF
1312
1313	!
1314	!-- If required, initialize dvrp-software
1315	IF ( dt_dvrp /= 9999999.9 ) CALL init_dvrp
1316
1317	IF ( ocean ) THEN
1318	!
1319	!-- Initialize quantities needed for the ocean model
1320	CALL init_ocean
1321
1322	ELSE
1323	!
1324	!-- Initialize quantities for handling cloud physics
1325	!-- This routine must be called before init_particles, because
1326	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
1327	!-- init_particles) is not defined.
1328	CALL init_cloud_physics
1329	ENDIF
1330
1331	!
1332	!-- If required, initialize particles
1333	IF ( particle_advection ) CALL init_particles
1334
1335	!
1336	!-- Initialize the ws-scheme.
1337	IF ( ws_scheme_sca .OR. ws_scheme_mom ) CALL ws_init
1338
1339	!
1340	!-- Setting weighting factors for right evaluation of perturbation pressure
1341	!-- and turbulent quantities during the RK substeps.
1342	IF ( TRIM(timestep_scheme) == 'runge-kutta-3' ) THEN ! RK3
1343	weight_substep(1) = 0.166666666666666
1344	weight_substep(2) = 0.3
1345	weight_substep(3) = 0.533333333333333
1346
1347	weight_pres(1) = 0.333333333333333
1348	weight_pres(2) = 0.416666666666666
1349	weight_pres(3) = 0.25
1350	ELSEIF ( TRIM(timestep_scheme) == 'runge-kutta-2' ) THEN ! RK2
1351	weight_substep(1) = 0.5
1352	weight_substep(2) = 0.5
1353
1354	weight_pres(1) = 0.5
1355	weight_pres(2) = 0.5
1356	ELSE ! Euler and Leapfrog
1357	weight_substep(1) = 1.0
1358	weight_pres(1) = 1.0
1359	ENDIF
1360
1361	!
1362	!-- Initialize Rayleigh damping factors
1363	rdf = 0.0
1364	IF ( rayleigh_damping_factor /= 0.0 ) THEN
1365	IF ( .NOT. ocean ) THEN
1366	DO k = nzb+1, nzt
1367	IF ( zu(k) >= rayleigh_damping_height ) THEN
1368	rdf(k) = rayleigh_damping_factor * &
1369	( SIN( pi * 0.5 * ( zu(k) - rayleigh_damping_height ) &
1370	/ ( zu(nzt) - rayleigh_damping_height ) )&
1371	)**2
1372	ENDIF
1373	ENDDO
1374	ELSE
1375	DO k = nzt, nzb+1, -1
1376	IF ( zu(k) <= rayleigh_damping_height ) THEN
1377	rdf(k) = rayleigh_damping_factor * &
1378	( SIN( pi * 0.5 * ( rayleigh_damping_height - zu(k) ) &
1379	/ ( rayleigh_damping_height - zu(nzb+1)))&
1380	)**2
1381	ENDIF
1382	ENDDO
1383	ENDIF
1384	ENDIF
1385
1386	!
1387	!-- Initialize the starting level and the vertical smoothing factor used for
1388	!-- the external pressure gradient
1389	dp_smooth_factor = 1.0
1390	IF ( dp_external ) THEN
1391	!
1392	!-- Set the starting level dp_level_ind_b only if it has not been set before
1393	!-- (e.g. in init_grid).
1394	IF ( dp_level_ind_b == 0 ) THEN
1395	ind_array = MINLOC( ABS( dp_level_b - zu ) )
1396	dp_level_ind_b = ind_array(1) - 1 + nzb
1397	! MINLOC uses lower array bound 1
1398	ENDIF
1399	IF ( dp_smooth ) THEN
1400	dp_smooth_factor(:dp_level_ind_b) = 0.0
1401	DO k = dp_level_ind_b+1, nzt
1402	dp_smooth_factor(k) = 0.5 * ( 1.0 + SIN( pi * &
1403	( REAL( k - dp_level_ind_b ) / &
1404	REAL( nzt - dp_level_ind_b ) - 0.5 ) ) )
1405	ENDDO
1406	ENDIF
1407	ENDIF
1408
1409	!
1410	!-- Initialize diffusivities used within the outflow damping layer in case of
1411	!-- non-cyclic lateral boundaries. A linear increase is assumed over the first
1412	!-- half of the width of the damping layer
1413	IF ( bc_lr == 'dirichlet/radiation' ) THEN
1414
1415	DO i = nxlg, nxrg
1416	IF ( i >= nx - outflow_damping_width ) THEN
1417	km_damp_x(i) = km_damp_max * MIN( 1.0, &
1418	( i - ( nx - outflow_damping_width ) ) / &
1419	REAL( outflow_damping_width/2 ) &
1420	)
1421	ELSE
1422	km_damp_x(i) = 0.0
1423	ENDIF
1424	ENDDO
1425
1426	ELSEIF ( bc_lr == 'radiation/dirichlet' ) THEN
1427
1428	DO i = nxlg, nxrg
1429	IF ( i <= outflow_damping_width ) THEN
1430	km_damp_x(i) = km_damp_max * MIN( 1.0, &
1431	( outflow_damping_width - i ) / &
1432	REAL( outflow_damping_width/2 ) &
1433	)
1434	ELSE
1435	km_damp_x(i) = 0.0
1436	ENDIF
1437	ENDDO
1438
1439	ENDIF
1440
1441	IF ( bc_ns == 'dirichlet/radiation' ) THEN
1442
1443	DO j = nysg, nyng
1444	IF ( j >= ny - outflow_damping_width ) THEN
1445	km_damp_y(j) = km_damp_max * MIN( 1.0, &
1446	( j - ( ny - outflow_damping_width ) ) / &
1447	REAL( outflow_damping_width/2 ) &
1448	)
1449	ELSE
1450	km_damp_y(j) = 0.0
1451	ENDIF
1452	ENDDO
1453
1454	ELSEIF ( bc_ns == 'radiation/dirichlet' ) THEN
1455
1456	DO j = nysg, nyng
1457	IF ( j <= outflow_damping_width ) THEN
1458	km_damp_y(j) = km_damp_max * MIN( 1.0, &
1459	( outflow_damping_width - j ) / &
1460	REAL( outflow_damping_width/2 ) &
1461	)
1462	ELSE
1463	km_damp_y(j) = 0.0
1464	ENDIF
1465	ENDDO
1466
1467	ENDIF
1468
1469	!
1470	!-- Initialize local summation arrays for UP flow_statistics. This is necessary
1471	!-- because they may not yet have been initialized when they are called from
1472	!-- flow_statistics (or - depending on the chosen model run - are never
1473	!-- initialized)
1474	sums_divnew_l = 0.0
1475	sums_divold_l = 0.0
1476	sums_l_l = 0.0
1477	sums_up_fraction_l = 0.0
1478	sums_wsts_bc_l = 0.0
1479
1480	!
1481	!-- Pre-set masks for regional statistics. Default is the total model domain.
1482	rmask = 1.0
1483
1484	!
1485	!-- User-defined initializing actions. Check afterwards, if maximum number
1486	!-- of allowed timeseries is not exceeded
1487	CALL user_init
1488
1489	IF ( dots_num > dots_max ) THEN
1490	WRITE( message_string, * ) 'number of time series quantities exceeds', &
1491	' its maximum of dots_max = ', dots_max, &
1492	' &Please increase dots_max in modules.f90.'
1493	CALL message( 'init_3d_model', 'PA0194', 1, 2, 0, 6, 0 )
1494	ENDIF
1495
1496	!
1497	!-- Input binary data file is not needed anymore. This line must be placed
1498	!-- after call of user_init!
1499	CALL close_file( 13 )
1500
1501	!
1502	!-- Compute total sum of active mask grid points
1503	!-- ngp_2dh: number of grid points of a horizontal cross section through the
1504	!-- total domain
1505	!-- ngp_3d: number of grid points of the total domain
1506	ngp_2dh_outer_l = 0
1507	ngp_2dh_outer = 0
1508	ngp_2dh_s_inner_l = 0
1509	ngp_2dh_s_inner = 0
1510	ngp_2dh_l = 0
1511	ngp_2dh = 0
1512	ngp_3d_inner_l = 0.0
1513	ngp_3d_inner = 0
1514	ngp_3d = 0
1515	ngp_sums = ( nz + 2 ) * ( pr_palm + max_pr_user )
1516
1517	DO sr = 0, statistic_regions
1518	DO i = nxl, nxr
1519	DO j = nys, nyn
1520	IF ( rmask(j,i,sr) == 1.0 ) THEN
1521	!
1522	!-- All xy-grid points
1523	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
1524	!
1525	!-- xy-grid points above topography
1526	DO k = nzb_s_outer(j,i), nz + 1
1527	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
1528	ENDDO
1529	DO k = nzb_s_inner(j,i), nz + 1
1530	ngp_2dh_s_inner_l(k,sr) = ngp_2dh_s_inner_l(k,sr) + 1
1531	ENDDO
1532	!
1533	!-- All grid points of the total domain above topography
1534	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
1535	( nz - nzb_s_inner(j,i) + 2 )
1536	ENDIF
1537	ENDDO
1538	ENDDO
1539	ENDDO
1540
1541	sr = statistic_regions + 1
1542	#if defined( __parallel )
1543	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1544	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
1545	comm2d, ierr )
1546	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1547	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
1548	MPI_INTEGER, MPI_SUM, comm2d, ierr )
1549	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1550	CALL MPI_ALLREDUCE( ngp_2dh_s_inner_l(0,0), ngp_2dh_s_inner(0,0), &
1551	(nz+2)*sr, MPI_INTEGER, MPI_SUM, comm2d, ierr )
1552	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1553	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner_tmp(0), sr, MPI_REAL, &
1554	MPI_SUM, comm2d, ierr )
1555	ngp_3d_inner = INT( ngp_3d_inner_tmp, KIND = SELECTED_INT_KIND( 18 ) )
1556	#else
1557	ngp_2dh = ngp_2dh_l
1558	ngp_2dh_outer = ngp_2dh_outer_l
1559	ngp_2dh_s_inner = ngp_2dh_s_inner_l
1560	ngp_3d_inner = INT( ngp_3d_inner_l, KIND = SELECTED_INT_KIND( 18 ) )
1561	#endif
1562
1563	ngp_3d = INT ( ngp_2dh, KIND = SELECTED_INT_KIND( 18 ) ) * &
1564	INT ( (nz + 2 ), KIND = SELECTED_INT_KIND( 18 ) )
1565
1566	!
1567	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
1568	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
1569	!-- the respective subdomain lie below the surface topography
1570	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
1571	ngp_3d_inner = MAX( INT(1, KIND = SELECTED_INT_KIND( 18 )), &
1572	ngp_3d_inner(:) )
1573	ngp_2dh_s_inner = MAX( 1, ngp_2dh_s_inner(:,:) )
1574
1575	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l, ngp_3d_inner_tmp )
1576
1577
1578	END SUBROUTINE init_3d_model

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