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source: palm/trunk/SOURCE/init_3d_model.f90 @ 582

Last change on this file since 582 was 561, checked in by weinreis, 14 years ago
last commit documented
Property svn:keywords set to `Id`
File size: 56.2 KB

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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	!
11	! Former revisions:
12	! -----------------
13	! $Id: init_3d_model.f90 561 2010-09-09 10:08:00Z heinze $
14	!
15	! 560 2010-09-09 10:06:09Z weinreis
16	! bugfix: correction of calculating ngp_3d for 64 bit
17	!
18	! 485 2010-02-05 10:57:51Z raasch
19	! calculation of ngp_3d + ngp_3d_inner changed because they have now 64 bit
20	!
21	! 407 2009-12-01 15:01:15Z maronga
22	! var_ts is replaced by dots_max
23	! Enabled passive scalar/humidity wall fluxes for non-flat topography
24	!
25	! 388 2009-09-23 09:40:33Z raasch
26	! Initialization of prho added.
27	! bugfix: correction of initial volume flow for non-flat topography
28	! bugfix: zero initialization of arrays within buildings for 'cyclic_fill'
29	! bugfix: avoid that ngp_2dh_s_inner becomes zero
30	! initializing_actions='read_data_for_recycling' renamed to 'cyclic_fill', now
31	! independent of turbulent_inflow
32	! Output of messages replaced by message handling routine.
33	! Set the starting level and the vertical smoothing factor used for
34	! the external pressure gradient
35	! +conserve_volume_flow_mode: 'default', 'initial_profiles', 'inflow_profile'
36	! and 'bulk_velocity'
37	! If the inversion height calculated by the prerun is zero,
38	! inflow_damping_height must be explicitly specified.
39	!
40	! 181 2008-07-30 07:07:47Z raasch
41	! bugfix: zero assignments to tendency arrays in case of restarts,
42	! further extensions and modifications in the initialisation of the plant
43	! canopy model,
44	! allocation of hom_sum moved to parin, initialization of spectrum_x\|y directly
45	! after allocating theses arrays,
46	! read data for recycling added as new initialization option,
47	! dummy allocation for diss
48	!
49	! 138 2007-11-28 10:03:58Z letzel
50	! New counter ngp_2dh_s_inner.
51	! Allow new case bc_uv_t = 'dirichlet_0' for channel flow.
52	! Corrected calculation of initial volume flow for 'set_1d-model_profiles' and
53	! 'set_constant_profiles' in case of buildings in the reference cross-sections.
54	!
55	! 108 2007-08-24 15:10:38Z letzel
56	! Flux initialization in case of coupled runs, +momentum fluxes at top boundary,
57	! +arrays for phase speed c_u, c_v, c_w, indices for u\|v\|w_m_l\|r changed
58	! +qswst_remote in case of atmosphere model with humidity coupled to ocean
59	! Rayleigh damping for ocean, optionally calculate km and kh from initial
60	! TKE e_init
61	!
62	! 97 2007-06-21 08:23:15Z raasch
63	! Initialization of salinity, call of init_ocean
64	!
65	! 87 2007-05-22 15:46:47Z raasch
66	! var_hom and var_sum renamed pr_palm
67	!
68	! 75 2007-03-22 09:54:05Z raasch
69	! Arrays for radiation boundary conditions are allocated (u_m_l, u_m_r, etc.),
70	! bugfix for cases with the outflow damping layer extending over more than one
71	! subdomain, moisture renamed humidity,
72	! new initializing action "by_user" calls user_init_3d_model,
73	! precipitation_amount/rate, ts_value are allocated, +module netcdf_control,
74	! initial velocities at nzb+1 are regarded for volume
75	! flow control in case they have been set zero before (to avoid small timesteps)
76	! -uvmean_outflow, uxrp, vynp eliminated
77	!
78	! 19 2007-02-23 04:53:48Z raasch
79	! +handling of top fluxes
80	!
81	! RCS Log replace by Id keyword, revision history cleaned up
82	!
83	! Revision 1.49 2006/08/22 15:59:07 raasch
84	! No optimization of this file on the ibmy (Yonsei Univ.)
85	!
86	! Revision 1.1 1998/03/09 16:22:22 raasch
87	! Initial revision
88	!
89	!
90	! Description:
91	! ------------
92	! Allocation of arrays and initialization of the 3D model via
93	! a) pre-run the 1D model
94	! or
95	! b) pre-set constant linear profiles
96	! or
97	! c) read values of a previous run
98	!------------------------------------------------------------------------------!
99
100	USE arrays_3d
101	USE averaging
102	USE cloud_parameters
103	USE constants
104	USE control_parameters
105	USE cpulog
106	USE indices
107	USE interfaces
108	USE model_1d
109	USE netcdf_control
110	USE particle_attributes
111	USE pegrid
112	USE profil_parameter
113	USE random_function_mod
114	USE statistics
115
116	IMPLICIT NONE
117
118	INTEGER :: i, ind_array(1), j, k, sr
119
120	INTEGER, DIMENSION(:), ALLOCATABLE :: ngp_2dh_l
121
122	INTEGER, DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l, &
123	ngp_2dh_s_inner_l
124
125	REAL :: a, b
126
127	REAL, DIMENSION(1:2) :: volume_flow_area_l, volume_flow_initial_l
128
129	REAL, DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_l, ngp_3d_inner_tmp
130
131
132	!
133	!-- Allocate arrays
134	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
135	ngp_3d(0:statistic_regions), &
136	ngp_3d_inner(0:statistic_regions), &
137	ngp_3d_inner_l(0:statistic_regions), &
138	ngp_3d_inner_tmp(0:statistic_regions), &
139	sums_divnew_l(0:statistic_regions), &
140	sums_divold_l(0:statistic_regions) )
141	ALLOCATE( dp_smooth_factor(nzb:nzt), rdf(nzb+1:nzt) )
142	ALLOCATE( ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
143	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
144	ngp_2dh_s_inner(nzb:nzt+1,0:statistic_regions), &
145	ngp_2dh_s_inner_l(nzb:nzt+1,0:statistic_regions), &
146	rmask(nys-1:nyn+1,nxl-1:nxr+1,0:statistic_regions), &
147	sums(nzb:nzt+1,pr_palm+max_pr_user), &
148	sums_l(nzb:nzt+1,pr_palm+max_pr_user,0:threads_per_task-1), &
149	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
150	sums_up_fraction_l(10,3,0:statistic_regions), &
151	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions), &
152	ts_value(dots_max,0:statistic_regions) )
153	ALLOCATE( km_damp_x(nxl-1:nxr+1), km_damp_y(nys-1:nyn+1) )
154
155	ALLOCATE( rif_1(nys-1:nyn+1,nxl-1:nxr+1), shf_1(nys-1:nyn+1,nxl-1:nxr+1), &
156	ts(nys-1:nyn+1,nxl-1:nxr+1), tswst_1(nys-1:nyn+1,nxl-1:nxr+1), &
157	us(nys-1:nyn+1,nxl-1:nxr+1), usws_1(nys-1:nyn+1,nxl-1:nxr+1), &
158	uswst_1(nys-1:nyn+1,nxl-1:nxr+1), &
159	vsws_1(nys-1:nyn+1,nxl-1:nxr+1), &
160	vswst_1(nys-1:nyn+1,nxl-1:nxr+1), z0(nys-1:nyn+1,nxl-1:nxr+1) )
161
162	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
163	!
164	!-- Leapfrog scheme needs two timelevels of diffusion quantities
165	ALLOCATE( rif_2(nys-1:nyn+1,nxl-1:nxr+1), &
166	shf_2(nys-1:nyn+1,nxl-1:nxr+1), &
167	tswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
168	usws_2(nys-1:nyn+1,nxl-1:nxr+1), &
169	uswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
170	vswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
171	vsws_2(nys-1:nyn+1,nxl-1:nxr+1) )
172	ENDIF
173
174	ALLOCATE( d(nzb+1:nzta,nys:nyna,nxl:nxra), &
175	e_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
176	e_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
177	e_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
178	kh_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
179	km_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
180	p(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
181	pt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
182	pt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
183	pt_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
184	tend(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
185	u_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
186	u_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
187	u_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
188	v_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
189	v_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
190	v_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
191	w_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
192	w_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
193	w_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
194
195	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
196	ALLOCATE( kh_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
197	km_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
198	ENDIF
199
200	IF ( humidity .OR. passive_scalar ) THEN
201	!
202	!-- 2D-humidity/scalar arrays
203	ALLOCATE ( qs(nys-1:nyn+1,nxl-1:nxr+1), &
204	qsws_1(nys-1:nyn+1,nxl-1:nxr+1), &
205	qswst_1(nys-1:nyn+1,nxl-1:nxr+1) )
206
207	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
208	ALLOCATE( qsws_2(nys-1:nyn+1,nxl-1:nxr+1), &
209	qswst_2(nys-1:nyn+1,nxl-1:nxr+1) )
210	ENDIF
211	!
212	!-- 3D-humidity/scalar arrays
213	ALLOCATE( q_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
214	q_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
215	q_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
216
217	!
218	!-- 3D-arrays needed for humidity only
219	IF ( humidity ) THEN
220	ALLOCATE( vpt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
221
222	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
223	ALLOCATE( vpt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
224	ENDIF
225
226	IF ( cloud_physics ) THEN
227	!
228	!-- Liquid water content
229	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
230	!
231	!-- Precipitation amount and rate (only needed if output is switched)
232	ALLOCATE( precipitation_amount(nys-1:nyn+1,nxl-1:nxr+1), &
233	precipitation_rate(nys-1:nyn+1,nxl-1:nxr+1) )
234	ENDIF
235
236	IF ( cloud_droplets ) THEN
237	!
238	!-- Liquid water content, change in liquid water content,
239	!-- real volume of particles (with weighting), volume of particles
240	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
241	ql_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
242	ql_v(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
243	ql_vp(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
244	ENDIF
245
246	ENDIF
247
248	ENDIF
249
250	IF ( ocean ) THEN
251	ALLOCATE( saswsb_1(nys-1:nyn+1,nxl-1:nxr+1), &
252	saswst_1(nys-1:nyn+1,nxl-1:nxr+1) )
253	ALLOCATE( prho_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
254	rho_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
255	sa_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
256	sa_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
257	sa_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
258	prho => prho_1
259	rho => rho_1 ! routines calc_mean_profile and diffusion_e require
260	! density to be apointer
261	IF ( humidity_remote ) THEN
262	ALLOCATE( qswst_remote(nys-1:nyn+1,nxl-1:nxr+1) )
263	qswst_remote = 0.0
264	ENDIF
265	ENDIF
266
267	!
268	!-- 3D-array for storing the dissipation, needed for calculating the sgs
269	!-- particle velocities
270	IF ( use_sgs_for_particles ) THEN
271	ALLOCATE ( diss(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
272	ELSE
273	ALLOCATE ( diss(2,2,2) ) ! required because diss is used as a
274	! formal parameter
275	ENDIF
276
277	IF ( dt_dosp /= 9999999.9 ) THEN
278	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
279	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
280	spectrum_x = 0.0
281	spectrum_y = 0.0
282	ENDIF
283
284	!
285	!-- 3D-arrays for the leaf area density and the canopy drag coefficient
286	IF ( plant_canopy ) THEN
287	ALLOCATE ( lad_s(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
288	lad_u(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
289	lad_v(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
290	lad_w(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
291	cdc(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
292
293	IF ( passive_scalar ) THEN
294	ALLOCATE ( sls(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
295	sec(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
296	ENDIF
297
298	IF ( cthf /= 0.0 ) THEN
299	ALLOCATE ( lai(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
300	canopy_heat_flux(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
301	ENDIF
302
303	ENDIF
304
305	!
306	!-- 4D-array for storing the Rif-values at vertical walls
307	IF ( topography /= 'flat' ) THEN
308	ALLOCATE( rif_wall(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1,1:4) )
309	rif_wall = 0.0
310	ENDIF
311
312	!
313	!-- Velocities at nzb+1 needed for volume flow control
314	IF ( conserve_volume_flow ) THEN
315	ALLOCATE( u_nzb_p1_for_vfc(nys:nyn), v_nzb_p1_for_vfc(nxl:nxr) )
316	u_nzb_p1_for_vfc = 0.0
317	v_nzb_p1_for_vfc = 0.0
318	ENDIF
319
320	!
321	!-- Arrays to store velocity data from t-dt and the phase speeds which
322	!-- are needed for radiation boundary conditions
323	IF ( outflow_l ) THEN
324	ALLOCATE( u_m_l(nzb:nzt+1,nys-1:nyn+1,1:2), &
325	v_m_l(nzb:nzt+1,nys-1:nyn+1,0:1), &
326	w_m_l(nzb:nzt+1,nys-1:nyn+1,0:1) )
327	ENDIF
328	IF ( outflow_r ) THEN
329	ALLOCATE( u_m_r(nzb:nzt+1,nys-1:nyn+1,nx-1:nx), &
330	v_m_r(nzb:nzt+1,nys-1:nyn+1,nx-1:nx), &
331	w_m_r(nzb:nzt+1,nys-1:nyn+1,nx-1:nx) )
332	ENDIF
333	IF ( outflow_l .OR. outflow_r ) THEN
334	ALLOCATE( c_u(nzb:nzt+1,nys-1:nyn+1), c_v(nzb:nzt+1,nys-1:nyn+1), &
335	c_w(nzb:nzt+1,nys-1:nyn+1) )
336	ENDIF
337	IF ( outflow_s ) THEN
338	ALLOCATE( u_m_s(nzb:nzt+1,0:1,nxl-1:nxr+1), &
339	v_m_s(nzb:nzt+1,1:2,nxl-1:nxr+1), &
340	w_m_s(nzb:nzt+1,0:1,nxl-1:nxr+1) )
341	ENDIF
342	IF ( outflow_n ) THEN
343	ALLOCATE( u_m_n(nzb:nzt+1,ny-1:ny,nxl-1:nxr+1), &
344	v_m_n(nzb:nzt+1,ny-1:ny,nxl-1:nxr+1), &
345	w_m_n(nzb:nzt+1,ny-1:ny,nxl-1:nxr+1) )
346	ENDIF
347	IF ( outflow_s .OR. outflow_n ) THEN
348	ALLOCATE( c_u(nzb:nzt+1,nxl-1:nxr+1), c_v(nzb:nzt+1,nxl-1:nxr+1), &
349	c_w(nzb:nzt+1,nxl-1:nxr+1) )
350	ENDIF
351
352	!
353	!-- Initial assignment of the pointers
354	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
355
356	rif_m => rif_1; rif => rif_2
357	shf_m => shf_1; shf => shf_2
358	tswst_m => tswst_1; tswst => tswst_2
359	usws_m => usws_1; usws => usws_2
360	uswst_m => uswst_1; uswst => uswst_2
361	vsws_m => vsws_1; vsws => vsws_2
362	vswst_m => vswst_1; vswst => vswst_2
363	e_m => e_1; e => e_2; e_p => e_3; te_m => e_3
364	kh_m => kh_1; kh => kh_2
365	km_m => km_1; km => km_2
366	pt_m => pt_1; pt => pt_2; pt_p => pt_3; tpt_m => pt_3
367	u_m => u_1; u => u_2; u_p => u_3; tu_m => u_3
368	v_m => v_1; v => v_2; v_p => v_3; tv_m => v_3
369	w_m => w_1; w => w_2; w_p => w_3; tw_m => w_3
370
371	IF ( humidity .OR. passive_scalar ) THEN
372	qsws_m => qsws_1; qsws => qsws_2
373	qswst_m => qswst_1; qswst => qswst_2
374	q_m => q_1; q => q_2; q_p => q_3; tq_m => q_3
375	IF ( humidity ) vpt_m => vpt_1; vpt => vpt_2
376	IF ( cloud_physics ) ql => ql_1
377	IF ( cloud_droplets ) THEN
378	ql => ql_1
379	ql_c => ql_2
380	ENDIF
381	ENDIF
382
383	ELSE
384
385	rif => rif_1
386	shf => shf_1
387	tswst => tswst_1
388	usws => usws_1
389	uswst => uswst_1
390	vsws => vsws_1
391	vswst => vswst_1
392	e => e_1; e_p => e_2; te_m => e_3; e_m => e_3
393	kh => kh_1
394	km => km_1
395	pt => pt_1; pt_p => pt_2; tpt_m => pt_3; pt_m => pt_3
396	u => u_1; u_p => u_2; tu_m => u_3; u_m => u_3
397	v => v_1; v_p => v_2; tv_m => v_3; v_m => v_3
398	w => w_1; w_p => w_2; tw_m => w_3; w_m => w_3
399
400	IF ( humidity .OR. passive_scalar ) THEN
401	qsws => qsws_1
402	qswst => qswst_1
403	q => q_1; q_p => q_2; tq_m => q_3; q_m => q_3
404	IF ( humidity ) vpt => vpt_1
405	IF ( cloud_physics ) ql => ql_1
406	IF ( cloud_droplets ) THEN
407	ql => ql_1
408	ql_c => ql_2
409	ENDIF
410	ENDIF
411
412	IF ( ocean ) THEN
413	saswsb => saswsb_1
414	saswst => saswst_1
415	sa => sa_1; sa_p => sa_2; tsa_m => sa_3
416	ENDIF
417
418	ENDIF
419
420	!
421	!-- Initialize model variables
422	IF ( TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
423	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
424	!
425	!-- First model run of a possible job queue.
426	!-- Initial profiles of the variables must be computes.
427	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
428	!
429	!-- Use solutions of the 1D model as initial profiles,
430	!-- start 1D model
431	CALL init_1d_model
432	!
433	!-- Transfer initial profiles to the arrays of the 3D model
434	DO i = nxl-1, nxr+1
435	DO j = nys-1, nyn+1
436	e(:,j,i) = e1d
437	kh(:,j,i) = kh1d
438	km(:,j,i) = km1d
439	pt(:,j,i) = pt_init
440	u(:,j,i) = u1d
441	v(:,j,i) = v1d
442	ENDDO
443	ENDDO
444
445	IF ( humidity .OR. passive_scalar ) THEN
446	DO i = nxl-1, nxr+1
447	DO j = nys-1, nyn+1
448	q(:,j,i) = q_init
449	ENDDO
450	ENDDO
451	ENDIF
452
453	IF ( .NOT. constant_diffusion ) THEN
454	DO i = nxl-1, nxr+1
455	DO j = nys-1, nyn+1
456	e(:,j,i) = e1d
457	ENDDO
458	ENDDO
459	!
460	!-- Store initial profiles for output purposes etc.
461	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
462
463	IF ( prandtl_layer ) THEN
464	rif = rif1d(nzb+1)
465	ts = 0.0 ! could actually be computed more accurately in the
466	! 1D model. Update when opportunity arises.
467	us = us1d
468	usws = usws1d
469	vsws = vsws1d
470	ELSE
471	ts = 0.0 ! must be set, because used in
472	rif = 0.0 ! flowste
473	us = 0.0
474	usws = 0.0
475	vsws = 0.0
476	ENDIF
477
478	ELSE
479	e = 0.0 ! must be set, because used in
480	rif = 0.0 ! flowste
481	ts = 0.0
482	us = 0.0
483	usws = 0.0
484	vsws = 0.0
485	ENDIF
486	uswst = top_momentumflux_u
487	vswst = top_momentumflux_v
488
489	!
490	!-- In every case qs = 0.0 (see also pt)
491	!-- This could actually be computed more accurately in the 1D model.
492	!-- Update when opportunity arises!
493	IF ( humidity .OR. passive_scalar ) qs = 0.0
494
495	!
496	!-- inside buildings set velocities back to zero
497	IF ( topography /= 'flat' ) THEN
498	DO i = nxl-1, nxr+1
499	DO j = nys-1, nyn+1
500	u(nzb:nzb_u_inner(j,i),j,i) = 0.0
501	v(nzb:nzb_v_inner(j,i),j,i) = 0.0
502	ENDDO
503	ENDDO
504	IF ( conserve_volume_flow ) THEN
505	IF ( nxr == nx ) THEN
506	DO j = nys, nyn
507	DO k = nzb + 1, nzb_u_inner(j,nx)
508	u_nzb_p1_for_vfc(j) = u_nzb_p1_for_vfc(j) + &
509	u1d(k) * dzu(k)
510	ENDDO
511	ENDDO
512	ENDIF
513	IF ( nyn == ny ) THEN
514	DO i = nxl, nxr
515	DO k = nzb + 1, nzb_v_inner(ny,i)
516	v_nzb_p1_for_vfc(i) = v_nzb_p1_for_vfc(i) + &
517	v1d(k) * dzu(k)
518	ENDDO
519	ENDDO
520	ENDIF
521	ENDIF
522	!
523	!-- WARNING: The extra boundary conditions set after running the
524	!-- ------- 1D model impose an error on the divergence one layer
525	!-- below the topography; need to correct later
526	!-- ATTENTION: Provisional correction for Piacsek & Williams
527	!-- --------- advection scheme: keep u and v zero one layer below
528	!-- the topography.
529	IF ( ibc_uv_b == 0 ) THEN
530	!
531	!-- Satisfying the Dirichlet condition with an extra layer below
532	!-- the surface where the u and v component change their sign.
533	DO i = nxl-1, nxr+1
534	DO j = nys-1, nyn+1
535	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = -u(1,j,i)
536	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = -v(1,j,i)
537	ENDDO
538	ENDDO
539
540	ELSE
541	!
542	!-- Neumann condition
543	DO i = nxl-1, nxr+1
544	DO j = nys-1, nyn+1
545	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
546	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
547	ENDDO
548	ENDDO
549
550	ENDIF
551
552	ENDIF
553
554	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
555	THEN
556	!
557	!-- Use constructed initial profiles (velocity constant with height,
558	!-- temperature profile with constant gradient)
559	DO i = nxl-1, nxr+1
560	DO j = nys-1, nyn+1
561	pt(:,j,i) = pt_init
562	u(:,j,i) = u_init
563	v(:,j,i) = v_init
564	ENDDO
565	ENDDO
566
567	!
568	!-- Set initial horizontal velocities at the lowest computational grid
569	!-- levels to zero in order to avoid too small time steps caused by the
570	!-- diffusion limit in the initial phase of a run (at k=1, dz/2 occurs
571	!-- in the limiting formula!). The original values are stored to be later
572	!-- used for volume flow control.
573	DO i = nxl-1, nxr+1
574	DO j = nys-1, nyn+1
575	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0
576	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0
577	ENDDO
578	ENDDO
579	IF ( conserve_volume_flow ) THEN
580	IF ( nxr == nx ) THEN
581	DO j = nys, nyn
582	DO k = nzb + 1, nzb_u_inner(j,nx) + 1
583	u_nzb_p1_for_vfc(j) = u_nzb_p1_for_vfc(j) + &
584	u_init(k) * dzu(k)
585	ENDDO
586	ENDDO
587	ENDIF
588	IF ( nyn == ny ) THEN
589	DO i = nxl, nxr
590	DO k = nzb + 1, nzb_v_inner(ny,i) + 1
591	v_nzb_p1_for_vfc(i) = v_nzb_p1_for_vfc(i) + &
592	v_init(k) * dzu(k)
593	ENDDO
594	ENDDO
595	ENDIF
596	ENDIF
597
598	IF ( humidity .OR. passive_scalar ) THEN
599	DO i = nxl-1, nxr+1
600	DO j = nys-1, nyn+1
601	q(:,j,i) = q_init
602	ENDDO
603	ENDDO
604	ENDIF
605
606	IF ( ocean ) THEN
607	DO i = nxl-1, nxr+1
608	DO j = nys-1, nyn+1
609	sa(:,j,i) = sa_init
610	ENDDO
611	ENDDO
612	ENDIF
613
614	IF ( constant_diffusion ) THEN
615	km = km_constant
616	kh = km / prandtl_number
617	e = 0.0
618	ELSEIF ( e_init > 0.0 ) THEN
619	DO k = nzb+1, nzt
620	km(k,:,:) = 0.1 * l_grid(k) * SQRT( e_init )
621	ENDDO
622	km(nzb,:,:) = km(nzb+1,:,:)
623	km(nzt+1,:,:) = km(nzt,:,:)
624	kh = km / prandtl_number
625	e = e_init
626	ELSE
627	IF ( .NOT. ocean ) THEN
628	kh = 0.01 ! there must exist an initial diffusion, because
629	km = 0.01 ! otherwise no TKE would be produced by the
630	! production terms, as long as not yet
631	! e = (u/cm)*2 at k=nzb+1
632	ELSE
633	kh = 0.00001
634	km = 0.00001
635	ENDIF
636	e = 0.0
637	ENDIF
638	rif = 0.0
639	ts = 0.0
640	us = 0.0
641	usws = 0.0
642	uswst = top_momentumflux_u
643	vsws = 0.0
644	vswst = top_momentumflux_v
645	IF ( humidity .OR. passive_scalar ) qs = 0.0
646
647	!
648	!-- Compute initial temperature field and other constants used in case
649	!-- of a sloping surface
650	IF ( sloping_surface ) CALL init_slope
651
652	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
653	THEN
654	!
655	!-- Initialization will completely be done by the user
656	CALL user_init_3d_model
657
658	ENDIF
659
660	!
661	!-- Apply channel flow boundary condition
662	IF ( TRIM( bc_uv_t ) == 'dirichlet_0' ) THEN
663
664	u(nzt+1,:,:) = 0.0
665	v(nzt+1,:,:) = 0.0
666
667	!-- For the Dirichlet condition to be correctly applied at the top, set
668	!-- ug and vg to zero there
669	ug(nzt+1) = 0.0
670	vg(nzt+1) = 0.0
671
672	ENDIF
673
674	!
675	!-- Calculate virtual potential temperature
676	IF ( humidity ) vpt = pt * ( 1.0 + 0.61 * q )
677
678	!
679	!-- Store initial profiles for output purposes etc.
680	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
681	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
682	IF ( ibc_uv_b == 0 ) THEN
683	hom(nzb,1,5,:) = -hom(nzb+1,1,5,:) ! due to satisfying the Dirichlet
684	hom(nzb,1,6,:) = -hom(nzb+1,1,6,:) ! condition with an extra layer
685	! below the surface where the u and v component change their sign
686	ENDIF
687	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
688	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
689	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
690
691	IF ( ocean ) THEN
692	!
693	!-- Store initial salinity profile
694	hom(:,1,26,:) = SPREAD( sa(:,nys,nxl), 2, statistic_regions+1 )
695	ENDIF
696
697	IF ( humidity ) THEN
698	!
699	!-- Store initial profile of total water content, virtual potential
700	!-- temperature
701	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
702	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
703	IF ( cloud_physics .OR. cloud_droplets ) THEN
704	!
705	!-- Store initial profile of specific humidity and potential
706	!-- temperature
707	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
708	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
709	ENDIF
710	ENDIF
711
712	IF ( passive_scalar ) THEN
713	!
714	!-- Store initial scalar profile
715	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
716	ENDIF
717
718	!
719	!-- Initialize fluxes at bottom surface
720	IF ( use_surface_fluxes ) THEN
721
722	IF ( constant_heatflux ) THEN
723	!
724	!-- Heat flux is prescribed
725	IF ( random_heatflux ) THEN
726	CALL disturb_heatflux
727	ELSE
728	shf = surface_heatflux
729	!
730	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
731	IF ( TRIM( topography ) /= 'flat' ) THEN
732	DO i = nxl-1, nxr+1
733	DO j = nys-1, nyn+1
734	IF ( nzb_s_inner(j,i) /= 0 ) THEN
735	shf(j,i) = wall_heatflux(0)
736	ENDIF
737	ENDDO
738	ENDDO
739	ENDIF
740	ENDIF
741	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
742	ENDIF
743
744	!
745	!-- Determine the near-surface water flux
746	IF ( humidity .OR. passive_scalar ) THEN
747	IF ( constant_waterflux ) THEN
748	qsws = surface_waterflux
749	!
750	!-- Over topography surface_waterflux is replaced by
751	!-- wall_humidityflux(0)
752	IF ( TRIM( topography ) /= 'flat' ) THEN
753	wall_qflux = wall_humidityflux
754	DO i = nxl-1, nxr+1
755	DO j = nys-1, nyn+1
756	IF ( nzb_s_inner(j,i) /= 0 ) THEN
757	qsws(j,i) = wall_qflux(0)
758	ENDIF
759	ENDDO
760	ENDDO
761	ENDIF
762	IF ( ASSOCIATED( qsws_m ) ) qsws_m = qsws
763	ENDIF
764	ENDIF
765
766	ENDIF
767
768	!
769	!-- Initialize fluxes at top surface
770	!-- Currently, only the heatflux and salinity flux can be prescribed.
771	!-- The latent flux is zero in this case!
772	IF ( use_top_fluxes ) THEN
773
774	IF ( constant_top_heatflux ) THEN
775	!
776	!-- Heat flux is prescribed
777	tswst = top_heatflux
778	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
779
780	IF ( humidity .OR. passive_scalar ) THEN
781	qswst = 0.0
782	IF ( ASSOCIATED( qswst_m ) ) qswst_m = qswst
783	ENDIF
784
785	IF ( ocean ) THEN
786	saswsb = bottom_salinityflux
787	saswst = top_salinityflux
788	ENDIF
789	ENDIF
790
791	!
792	!-- Initialization in case of a coupled model run
793	IF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
794	tswst = 0.0
795	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
796	ENDIF
797
798	ENDIF
799
800	!
801	!-- Initialize Prandtl layer quantities
802	IF ( prandtl_layer ) THEN
803
804	z0 = roughness_length
805
806	IF ( .NOT. constant_heatflux ) THEN
807	!
808	!-- Surface temperature is prescribed. Here the heat flux cannot be
809	!-- simply estimated, because therefore rif, u* and theta* would have
810	!-- to be computed by iteration. This is why the heat flux is assumed
811	!-- to be zero before the first time step. It approaches its correct
812	!-- value in the course of the first few time steps.
813	shf = 0.0
814	IF ( ASSOCIATED( shf_m ) ) shf_m = 0.0
815	ENDIF
816
817	IF ( humidity .OR. passive_scalar ) THEN
818	IF ( .NOT. constant_waterflux ) THEN
819	qsws = 0.0
820	IF ( ASSOCIATED( qsws_m ) ) qsws_m = 0.0
821	ENDIF
822	ENDIF
823
824	ENDIF
825
826	!
827	!-- Calculate the initial volume flow at the right and north boundary
828	IF ( conserve_volume_flow ) THEN
829
830	volume_flow_initial_l = 0.0
831	volume_flow_area_l = 0.0
832
833	IF ( nxr == nx ) THEN
834	DO j = nys, nyn
835	DO k = nzb_2d(j,nx) + 1, nzt
836	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
837	u(k,j,nx) * dzu(k)
838	volume_flow_area_l(1) = volume_flow_area_l(1) + dzu(k)
839	ENDDO
840	!
841	!-- Correction if velocity at nzb+1 has been set zero further above
842	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
843	u_nzb_p1_for_vfc(j)
844	ENDDO
845	ENDIF
846
847	IF ( nyn == ny ) THEN
848	DO i = nxl, nxr
849	DO k = nzb_2d(ny,i) + 1, nzt
850	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
851	v(k,ny,i) * dzu(k)
852	volume_flow_area_l(2) = volume_flow_area_l(2) + dzu(k)
853	ENDDO
854	!
855	!-- Correction if velocity at nzb+1 has been set zero further above
856	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
857	v_nzb_p1_for_vfc(i)
858	ENDDO
859	ENDIF
860
861	#if defined( __parallel )
862	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
863	2, MPI_REAL, MPI_SUM, comm2d, ierr )
864	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
865	2, MPI_REAL, MPI_SUM, comm2d, ierr )
866	#else
867	volume_flow_initial = volume_flow_initial_l
868	volume_flow_area = volume_flow_area_l
869	#endif
870	!
871	!-- In case of 'bulk_velocity' mode, volume_flow_initial is overridden
872	!-- and calculated from u\|v_bulk instead.
873	IF ( TRIM( conserve_volume_flow_mode ) == 'bulk_velocity' ) THEN
874	volume_flow_initial(1) = u_bulk * volume_flow_area(1)
875	volume_flow_initial(2) = v_bulk * volume_flow_area(2)
876	ENDIF
877
878	ENDIF
879
880	!
881	!-- For the moment, perturbation pressure and vertical velocity are zero
882	p = 0.0; w = 0.0
883
884	!
885	!-- Initialize array sums (must be defined in first call of pres)
886	sums = 0.0
887
888	!
889	!-- Treating cloud physics, liquid water content and precipitation amount
890	!-- are zero at beginning of the simulation
891	IF ( cloud_physics ) THEN
892	ql = 0.0
893	IF ( precipitation ) precipitation_amount = 0.0
894	ENDIF
895
896	!
897	!-- Impose vortex with vertical axis on the initial velocity profile
898	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
899	CALL init_rankine
900	ENDIF
901
902	!
903	!-- Impose temperature anomaly (advection test only)
904	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
905	CALL init_pt_anomaly
906	ENDIF
907
908	!
909	!-- If required, change the surface temperature at the start of the 3D run
910	IF ( pt_surface_initial_change /= 0.0 ) THEN
911	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
912	ENDIF
913
914	!
915	!-- If required, change the surface humidity/scalar at the start of the 3D
916	!-- run
917	IF ( ( humidity .OR. passive_scalar ) .AND. &
918	q_surface_initial_change /= 0.0 ) THEN
919	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
920	ENDIF
921
922	!
923	!-- Initialize the random number generator (from numerical recipes)
924	CALL random_function_ini
925
926	!
927	!-- Impose random perturbation on the horizontal velocity field and then
928	!-- remove the divergences from the velocity field
929	IF ( create_disturbances ) THEN
930	CALL disturb_field( nzb_u_inner, tend, u )
931	CALL disturb_field( nzb_v_inner, tend, v )
932	n_sor = nsor_ini
933	CALL pres
934	n_sor = nsor
935	ENDIF
936
937	!
938	!-- Once again set the perturbation pressure explicitly to zero in order to
939	!-- assure that it does not generate any divergences in the first time step.
940	!-- At t=0 the velocity field is free of divergence (as constructed above).
941	!-- Divergences being created during a time step are not yet known and thus
942	!-- cannot be corrected during the time step yet.
943	p = 0.0
944
945	!
946	!-- Initialize old and new time levels.
947	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
948	e_m = e; pt_m = pt; u_m = u; v_m = v; w_m = w; kh_m = kh; km_m = km
949	ELSE
950	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
951	ENDIF
952	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
953
954	IF ( humidity .OR. passive_scalar ) THEN
955	IF ( ASSOCIATED( q_m ) ) q_m = q
956	IF ( timestep_scheme(1:5) == 'runge' ) tq_m = 0.0
957	q_p = q
958	IF ( humidity .AND. ASSOCIATED( vpt_m ) ) vpt_m = vpt
959	ENDIF
960
961	IF ( ocean ) THEN
962	tsa_m = 0.0
963	sa_p = sa
964	ENDIF
965
966
967	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' .OR. &
968	TRIM( initializing_actions ) == 'cyclic_fill' ) &
969	THEN
970	!
971	!-- When reading data for cyclic fill of 3D prerun data, first read
972	!-- some of the global variables from restart file
973	IF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
974
975	WRITE (9,*) 'before read_parts_of_var_list'
976	CALL local_flush( 9 )
977	CALL read_parts_of_var_list
978	WRITE (9,*) 'after read_parts_of_var_list'
979	CALL local_flush( 9 )
980	CALL close_file( 13 )
981
982	!
983	!-- Initialization of the turbulence recycling method
984	IF ( turbulent_inflow ) THEN
985	!
986	!-- Store temporally and horizontally averaged vertical profiles to be
987	!-- used as mean inflow profiles
988	ALLOCATE( mean_inflow_profiles(nzb:nzt+1,5) )
989
990	mean_inflow_profiles(:,1) = hom_sum(:,1,0) ! u
991	mean_inflow_profiles(:,2) = hom_sum(:,2,0) ! v
992	mean_inflow_profiles(:,4) = hom_sum(:,4,0) ! pt
993	mean_inflow_profiles(:,5) = hom_sum(:,8,0) ! e
994
995	!
996	!-- Use these mean profiles for the inflow (provided that Dirichlet
997	!-- conditions are used)
998	IF ( inflow_l ) THEN
999	DO j = nys-1, nyn+1
1000	DO k = nzb, nzt+1
1001	u(k,j,-1) = mean_inflow_profiles(k,1)
1002	v(k,j,-1) = mean_inflow_profiles(k,2)
1003	w(k,j,-1) = 0.0
1004	pt(k,j,-1) = mean_inflow_profiles(k,4)
1005	e(k,j,-1) = mean_inflow_profiles(k,5)
1006	ENDDO
1007	ENDDO
1008	ENDIF
1009
1010	!
1011	!-- Calculate the damping factors to be used at the inflow. For a
1012	!-- turbulent inflow the turbulent fluctuations have to be limited
1013	!-- vertically because otherwise the turbulent inflow layer will grow
1014	!-- in time.
1015	IF ( inflow_damping_height == 9999999.9 ) THEN
1016	!
1017	!-- Default: use the inversion height calculated by the prerun; if
1018	!-- this is zero, inflow_damping_height must be explicitly
1019	!-- specified.
1020	IF ( hom_sum(nzb+6,pr_palm,0) /= 0.0 ) THEN
1021	inflow_damping_height = hom_sum(nzb+6,pr_palm,0)
1022	ELSE
1023	WRITE( message_string, * ) 'inflow_damping_height must be ',&
1024	'explicitly specified because&the inversion height ', &
1025	'calculated by the prerun is zero.'
1026	CALL message( 'init_3d_model', 'PA0318', 1, 2, 0, 6, 0 )
1027	ENDIF
1028
1029	ENDIF
1030
1031	IF ( inflow_damping_width == 9999999.9 ) THEN
1032	!
1033	!-- Default for the transition range: one tenth of the undamped
1034	!-- layer
1035	inflow_damping_width = 0.1 * inflow_damping_height
1036
1037	ENDIF
1038
1039	ALLOCATE( inflow_damping_factor(nzb:nzt+1) )
1040
1041	DO k = nzb, nzt+1
1042
1043	IF ( zu(k) <= inflow_damping_height ) THEN
1044	inflow_damping_factor(k) = 1.0
1045	ELSEIF ( zu(k) <= inflow_damping_height + &
1046	inflow_damping_width ) THEN
1047	inflow_damping_factor(k) = 1.0 - &
1048	( zu(k) - inflow_damping_height ) / &
1049	inflow_damping_width
1050	ELSE
1051	inflow_damping_factor(k) = 0.0
1052	ENDIF
1053
1054	ENDDO
1055	ENDIF
1056
1057	ENDIF
1058
1059	!
1060	!-- Read binary data from restart file
1061	WRITE (9,*) 'before read_3d_binary'
1062	CALL local_flush( 9 )
1063	CALL read_3d_binary
1064	WRITE (9,*) 'after read_3d_binary'
1065	CALL local_flush( 9 )
1066
1067	!
1068	!-- Inside buildings set velocities and TKE back to zero
1069	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. &
1070	topography /= 'flat' ) THEN
1071	!
1072	!-- Correction of initial volume flow
1073	IF ( conserve_volume_flow ) THEN
1074	IF ( nxr == nx ) THEN
1075	DO j = nys, nyn
1076	DO k = nzb + 1, nzb_u_inner(j,nx)
1077	u_nzb_p1_for_vfc(j) = u_nzb_p1_for_vfc(j) + &
1078	u(k,j,nx) * dzu(k)
1079	ENDDO
1080	ENDDO
1081	ENDIF
1082	IF ( nyn == ny ) THEN
1083	DO i = nxl, nxr
1084	DO k = nzb + 1, nzb_v_inner(ny,i)
1085	v_nzb_p1_for_vfc(i) = v_nzb_p1_for_vfc(i) + &
1086	v(k,ny,i) * dzu(k)
1087	ENDDO
1088	ENDDO
1089	ENDIF
1090	ENDIF
1091
1092	!
1093	!-- Inside buildings set velocities and TKE back to zero.
1094	!-- Other scalars (pt, q, s, km, kh, p, sa, ...) are ignored at present,
1095	!-- maybe revise later.
1096	IF ( timestep_scheme(1:5) == 'runge' ) THEN
1097	DO i = nxl-1, nxr+1
1098	DO j = nys-1, nyn+1
1099	u (nzb:nzb_u_inner(j,i),j,i) = 0.0
1100	v (nzb:nzb_v_inner(j,i),j,i) = 0.0
1101	w (nzb:nzb_w_inner(j,i),j,i) = 0.0
1102	e (nzb:nzb_w_inner(j,i),j,i) = 0.0
1103	u_m(nzb:nzb_u_inner(j,i),j,i) = 0.0
1104	v_m(nzb:nzb_v_inner(j,i),j,i) = 0.0
1105	w_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1106	e_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1107	tu_m(nzb:nzb_u_inner(j,i),j,i) = 0.0
1108	tv_m(nzb:nzb_v_inner(j,i),j,i) = 0.0
1109	tw_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1110	te_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1111	tpt_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1112	ENDDO
1113	ENDDO
1114	ELSE
1115	DO i = nxl-1, nxr+1
1116	DO j = nys-1, nyn+1
1117	u (nzb:nzb_u_inner(j,i),j,i) = 0.0
1118	v (nzb:nzb_v_inner(j,i),j,i) = 0.0
1119	w (nzb:nzb_w_inner(j,i),j,i) = 0.0
1120	e (nzb:nzb_w_inner(j,i),j,i) = 0.0
1121	u_m(nzb:nzb_u_inner(j,i),j,i) = 0.0
1122	v_m(nzb:nzb_v_inner(j,i),j,i) = 0.0
1123	w_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1124	e_m(nzb:nzb_w_inner(j,i),j,i) = 0.0
1125	u_p(nzb:nzb_u_inner(j,i),j,i) = 0.0
1126	v_p(nzb:nzb_v_inner(j,i),j,i) = 0.0
1127	w_p(nzb:nzb_w_inner(j,i),j,i) = 0.0
1128	e_p(nzb:nzb_w_inner(j,i),j,i) = 0.0
1129	ENDDO
1130	ENDDO
1131	ENDIF
1132
1133	ENDIF
1134
1135	!
1136	!-- Calculate the initial volume flow at the right and north boundary
1137	IF ( conserve_volume_flow .AND. &
1138	TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1139
1140	volume_flow_initial_l = 0.0
1141	volume_flow_area_l = 0.0
1142
1143	IF ( nxr == nx ) THEN
1144	DO j = nys, nyn
1145	DO k = nzb_2d(j,nx) + 1, nzt
1146	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1147	u(k,j,nx) * dzu(k)
1148	volume_flow_area_l(1) = volume_flow_area_l(1) + dzu(k)
1149	ENDDO
1150	!
1151	!-- Correction if velocity inside buildings has been set to zero
1152	!-- further above
1153	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1154	u_nzb_p1_for_vfc(j)
1155	ENDDO
1156	ENDIF
1157
1158	IF ( nyn == ny ) THEN
1159	DO i = nxl, nxr
1160	DO k = nzb_2d(ny,i) + 1, nzt
1161	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1162	v(k,ny,i) * dzu(k)
1163	volume_flow_area_l(2) = volume_flow_area_l(2) + dzu(k)
1164	ENDDO
1165	!
1166	!-- Correction if velocity inside buildings has been set to zero
1167	!-- further above
1168	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1169	v_nzb_p1_for_vfc(i)
1170	ENDDO
1171	ENDIF
1172
1173	#if defined( __parallel )
1174	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1175	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1176	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1177	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1178	#else
1179	volume_flow_initial = volume_flow_initial_l
1180	volume_flow_area = volume_flow_area_l
1181	#endif
1182	ENDIF
1183
1184
1185	!
1186	!-- Calculate initial temperature field and other constants used in case
1187	!-- of a sloping surface
1188	IF ( sloping_surface ) CALL init_slope
1189
1190	!
1191	!-- Initialize new time levels (only done in order to set boundary values
1192	!-- including ghost points)
1193	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
1194	IF ( humidity .OR. passive_scalar ) q_p = q
1195	IF ( ocean ) sa_p = sa
1196
1197	!
1198	!-- Allthough tendency arrays are set in prognostic_equations, they have
1199	!-- have to be predefined here because they are used (but multiplied with 0)
1200	!-- there before they are set.
1201	IF ( timestep_scheme(1:5) == 'runge' ) THEN
1202	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
1203	IF ( humidity .OR. passive_scalar ) tq_m = 0.0
1204	IF ( ocean ) tsa_m = 0.0
1205	ENDIF
1206
1207	ELSE
1208	!
1209	!-- Actually this part of the programm should not be reached
1210	message_string = 'unknown initializing problem'
1211	CALL message( 'init_3d_model', 'PA0193', 1, 2, 0, 6, 0 )
1212	ENDIF
1213
1214
1215	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1216	!
1217	!-- Initialize old timelevels needed for radiation boundary conditions
1218	IF ( outflow_l ) THEN
1219	u_m_l(:,:,:) = u(:,:,1:2)
1220	v_m_l(:,:,:) = v(:,:,0:1)
1221	w_m_l(:,:,:) = w(:,:,0:1)
1222	ENDIF
1223	IF ( outflow_r ) THEN
1224	u_m_r(:,:,:) = u(:,:,nx-1:nx)
1225	v_m_r(:,:,:) = v(:,:,nx-1:nx)
1226	w_m_r(:,:,:) = w(:,:,nx-1:nx)
1227	ENDIF
1228	IF ( outflow_s ) THEN
1229	u_m_s(:,:,:) = u(:,0:1,:)
1230	v_m_s(:,:,:) = v(:,1:2,:)
1231	w_m_s(:,:,:) = w(:,0:1,:)
1232	ENDIF
1233	IF ( outflow_n ) THEN
1234	u_m_n(:,:,:) = u(:,ny-1:ny,:)
1235	v_m_n(:,:,:) = v(:,ny-1:ny,:)
1236	w_m_n(:,:,:) = w(:,ny-1:ny,:)
1237	ENDIF
1238
1239	ENDIF
1240
1241	!
1242	!-- Initialization of the leaf area density
1243	IF ( plant_canopy ) THEN
1244
1245	SELECT CASE ( TRIM( canopy_mode ) )
1246
1247	CASE( 'block' )
1248
1249	DO i = nxl-1, nxr+1
1250	DO j = nys-1, nyn+1
1251	lad_s(:,j,i) = lad(:)
1252	cdc(:,j,i) = drag_coefficient
1253	IF ( passive_scalar ) THEN
1254	sls(:,j,i) = leaf_surface_concentration
1255	sec(:,j,i) = scalar_exchange_coefficient
1256	ENDIF
1257	ENDDO
1258	ENDDO
1259
1260	CASE DEFAULT
1261
1262	!
1263	!-- The DEFAULT case is reached either if the parameter
1264	!-- canopy mode contains a wrong character string or if the
1265	!-- user has coded a special case in the user interface.
1266	!-- There, the subroutine user_init_plant_canopy checks
1267	!-- which of these two conditions applies.
1268	CALL user_init_plant_canopy
1269
1270	END SELECT
1271
1272	CALL exchange_horiz( lad_s )
1273	CALL exchange_horiz( cdc )
1274
1275	IF ( passive_scalar ) THEN
1276	CALL exchange_horiz( sls )
1277	CALL exchange_horiz( sec )
1278	ENDIF
1279
1280	!
1281	!-- Sharp boundaries of the plant canopy in horizontal directions
1282	!-- In vertical direction the interpolation is retained, as the leaf
1283	!-- area density is initialised by prescribing a vertical profile
1284	!-- consisting of piecewise linear segments. The upper boundary
1285	!-- of the plant canopy is now defined by lad_w(pch_index,:,:) = 0.0.
1286
1287	DO i = nxl, nxr
1288	DO j = nys, nyn
1289	DO k = nzb, nzt+1
1290	IF ( lad_s(k,j,i) > 0.0 ) THEN
1291	lad_u(k,j,i) = lad_s(k,j,i)
1292	lad_u(k,j,i+1) = lad_s(k,j,i)
1293	lad_v(k,j,i) = lad_s(k,j,i)
1294	lad_v(k,j+1,i) = lad_s(k,j,i)
1295	ENDIF
1296	ENDDO
1297	DO k = nzb, nzt
1298	lad_w(k,j,i) = 0.5 * ( lad_s(k+1,j,i) + lad_s(k,j,i) )
1299	ENDDO
1300	ENDDO
1301	ENDDO
1302
1303	lad_w(pch_index,:,:) = 0.0
1304	lad_w(nzt+1,:,:) = lad_w(nzt,:,:)
1305
1306	CALL exchange_horiz( lad_u )
1307	CALL exchange_horiz( lad_v )
1308	CALL exchange_horiz( lad_w )
1309
1310	!
1311	!-- Initialisation of the canopy heat source distribution
1312	IF ( cthf /= 0.0 ) THEN
1313	!
1314	!-- Piecewise evaluation of the leaf area index by
1315	!-- integration of the leaf area density
1316	lai(:,:,:) = 0.0
1317	DO i = nxl-1, nxr+1
1318	DO j = nys-1, nyn+1
1319	DO k = pch_index-1, 0, -1
1320	lai(k,j,i) = lai(k+1,j,i) + &
1321	( 0.5 * ( lad_w(k+1,j,i) + &
1322	lad_s(k+1,j,i) ) * &
1323	( zw(k+1) - zu(k+1) ) ) + &
1324	( 0.5 * ( lad_w(k,j,i) + &
1325	lad_s(k+1,j,i) ) * &
1326	( zu(k+1) - zw(k) ) )
1327	ENDDO
1328	ENDDO
1329	ENDDO
1330
1331	!
1332	!-- Evaluation of the upward kinematic vertical heat flux within the
1333	!-- canopy
1334	DO i = nxl-1, nxr+1
1335	DO j = nys-1, nyn+1
1336	DO k = 0, pch_index
1337	canopy_heat_flux(k,j,i) = cthf * &
1338	exp( -0.6 * lai(k,j,i) )
1339	ENDDO
1340	ENDDO
1341	ENDDO
1342
1343	!
1344	!-- The near surface heat flux is derived from the heat flux
1345	!-- distribution within the canopy
1346	shf(:,:) = canopy_heat_flux(0,:,:)
1347
1348	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
1349
1350	ENDIF
1351
1352	ENDIF
1353
1354	!
1355	!-- If required, initialize dvrp-software
1356	IF ( dt_dvrp /= 9999999.9 ) CALL init_dvrp
1357
1358	IF ( ocean ) THEN
1359	!
1360	!-- Initialize quantities needed for the ocean model
1361	CALL init_ocean
1362
1363	ELSE
1364	!
1365	!-- Initialize quantities for handling cloud physics
1366	!-- This routine must be called before init_particles, because
1367	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
1368	!-- init_particles) is not defined.
1369	CALL init_cloud_physics
1370	ENDIF
1371
1372	!
1373	!-- If required, initialize particles
1374	IF ( particle_advection ) CALL init_particles
1375
1376	!
1377	!-- Initialize quantities for special advections schemes
1378	CALL init_advec
1379
1380	!
1381	!-- Initialize Rayleigh damping factors
1382	rdf = 0.0
1383	IF ( rayleigh_damping_factor /= 0.0 ) THEN
1384	IF ( .NOT. ocean ) THEN
1385	DO k = nzb+1, nzt
1386	IF ( zu(k) >= rayleigh_damping_height ) THEN
1387	rdf(k) = rayleigh_damping_factor * &
1388	( SIN( pi * 0.5 * ( zu(k) - rayleigh_damping_height ) &
1389	/ ( zu(nzt) - rayleigh_damping_height ) )&
1390	)**2
1391	ENDIF
1392	ENDDO
1393	ELSE
1394	DO k = nzt, nzb+1, -1
1395	IF ( zu(k) <= rayleigh_damping_height ) THEN
1396	rdf(k) = rayleigh_damping_factor * &
1397	( SIN( pi * 0.5 * ( rayleigh_damping_height - zu(k) ) &
1398	/ ( rayleigh_damping_height - zu(nzb+1)))&
1399	)**2
1400	ENDIF
1401	ENDDO
1402	ENDIF
1403	ENDIF
1404
1405	!
1406	!-- Initialize the starting level and the vertical smoothing factor used for
1407	!-- the external pressure gradient
1408	dp_smooth_factor = 1.0
1409	IF ( dp_external ) THEN
1410	!
1411	!-- Set the starting level dp_level_ind_b only if it has not been set before
1412	!-- (e.g. in init_grid).
1413	IF ( dp_level_ind_b == 0 ) THEN
1414	ind_array = MINLOC( ABS( dp_level_b - zu ) )
1415	dp_level_ind_b = ind_array(1) - 1 + nzb
1416	! MINLOC uses lower array bound 1
1417	ENDIF
1418	IF ( dp_smooth ) THEN
1419	dp_smooth_factor(:dp_level_ind_b) = 0.0
1420	DO k = dp_level_ind_b+1, nzt
1421	dp_smooth_factor(k) = 0.5 * ( 1.0 + SIN( pi * &
1422	( REAL( k - dp_level_ind_b ) / &
1423	REAL( nzt - dp_level_ind_b ) - 0.5 ) ) )
1424	ENDDO
1425	ENDIF
1426	ENDIF
1427
1428	!
1429	!-- Initialize diffusivities used within the outflow damping layer in case of
1430	!-- non-cyclic lateral boundaries. A linear increase is assumed over the first
1431	!-- half of the width of the damping layer
1432	IF ( bc_lr == 'dirichlet/radiation' ) THEN
1433
1434	DO i = nxl-1, nxr+1
1435	IF ( i >= nx - outflow_damping_width ) THEN
1436	km_damp_x(i) = km_damp_max * MIN( 1.0, &
1437	( i - ( nx - outflow_damping_width ) ) / &
1438	REAL( outflow_damping_width/2 ) &
1439	)
1440	ELSE
1441	km_damp_x(i) = 0.0
1442	ENDIF
1443	ENDDO
1444
1445	ELSEIF ( bc_lr == 'radiation/dirichlet' ) THEN
1446
1447	DO i = nxl-1, nxr+1
1448	IF ( i <= outflow_damping_width ) THEN
1449	km_damp_x(i) = km_damp_max * MIN( 1.0, &
1450	( outflow_damping_width - i ) / &
1451	REAL( outflow_damping_width/2 ) &
1452	)
1453	ELSE
1454	km_damp_x(i) = 0.0
1455	ENDIF
1456	ENDDO
1457
1458	ENDIF
1459
1460	IF ( bc_ns == 'dirichlet/radiation' ) THEN
1461
1462	DO j = nys-1, nyn+1
1463	IF ( j >= ny - outflow_damping_width ) THEN
1464	km_damp_y(j) = km_damp_max * MIN( 1.0, &
1465	( j - ( ny - outflow_damping_width ) ) / &
1466	REAL( outflow_damping_width/2 ) &
1467	)
1468	ELSE
1469	km_damp_y(j) = 0.0
1470	ENDIF
1471	ENDDO
1472
1473	ELSEIF ( bc_ns == 'radiation/dirichlet' ) THEN
1474
1475	DO j = nys-1, nyn+1
1476	IF ( j <= outflow_damping_width ) THEN
1477	km_damp_y(j) = km_damp_max * MIN( 1.0, &
1478	( outflow_damping_width - j ) / &
1479	REAL( outflow_damping_width/2 ) &
1480	)
1481	ELSE
1482	km_damp_y(j) = 0.0
1483	ENDIF
1484	ENDDO
1485
1486	ENDIF
1487
1488	!
1489	!-- Initialize local summation arrays for UP flow_statistics. This is necessary
1490	!-- because they may not yet have been initialized when they are called from
1491	!-- flow_statistics (or - depending on the chosen model run - are never
1492	!-- initialized)
1493	sums_divnew_l = 0.0
1494	sums_divold_l = 0.0
1495	sums_l_l = 0.0
1496	sums_up_fraction_l = 0.0
1497	sums_wsts_bc_l = 0.0
1498
1499	!
1500	!-- Pre-set masks for regional statistics. Default is the total model domain.
1501	rmask = 1.0
1502
1503	!
1504	!-- User-defined initializing actions. Check afterwards, if maximum number
1505	!-- of allowed timeseries is not exceeded
1506	CALL user_init
1507
1508	IF ( dots_num > dots_max ) THEN
1509	WRITE( message_string, * ) 'number of time series quantities exceeds', &
1510	' its maximum of dots_max = ', dots_max, &
1511	' &Please increase dots_max in modules.f90.'
1512	CALL message( 'init_3d_model', 'PA0194', 1, 2, 0, 6, 0 )
1513	ENDIF
1514
1515	!
1516	!-- Input binary data file is not needed anymore. This line must be placed
1517	!-- after call of user_init!
1518	CALL close_file( 13 )
1519
1520	!
1521	!-- Compute total sum of active mask grid points
1522	!-- ngp_2dh: number of grid points of a horizontal cross section through the
1523	!-- total domain
1524	!-- ngp_3d: number of grid points of the total domain
1525	ngp_2dh_outer_l = 0
1526	ngp_2dh_outer = 0
1527	ngp_2dh_s_inner_l = 0
1528	ngp_2dh_s_inner = 0
1529	ngp_2dh_l = 0
1530	ngp_2dh = 0
1531	ngp_3d_inner_l = 0.0
1532	ngp_3d_inner = 0
1533	ngp_3d = 0
1534	ngp_sums = ( nz + 2 ) * ( pr_palm + max_pr_user )
1535
1536	DO sr = 0, statistic_regions
1537	DO i = nxl, nxr
1538	DO j = nys, nyn
1539	IF ( rmask(j,i,sr) == 1.0 ) THEN
1540	!
1541	!-- All xy-grid points
1542	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
1543	!
1544	!-- xy-grid points above topography
1545	DO k = nzb_s_outer(j,i), nz + 1
1546	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
1547	ENDDO
1548	DO k = nzb_s_inner(j,i), nz + 1
1549	ngp_2dh_s_inner_l(k,sr) = ngp_2dh_s_inner_l(k,sr) + 1
1550	ENDDO
1551	!
1552	!-- All grid points of the total domain above topography
1553	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
1554	( nz - nzb_s_inner(j,i) + 2 )
1555	ENDIF
1556	ENDDO
1557	ENDDO
1558	ENDDO
1559
1560	sr = statistic_regions + 1
1561	#if defined( __parallel )
1562	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
1563	comm2d, ierr )
1564	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
1565	MPI_INTEGER, MPI_SUM, comm2d, ierr )
1566	CALL MPI_ALLREDUCE( ngp_2dh_s_inner_l(0,0), ngp_2dh_s_inner(0,0), &
1567	(nz+2)*sr, MPI_INTEGER, MPI_SUM, comm2d, ierr )
1568	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner_tmp(0), sr, MPI_REAL, &
1569	MPI_SUM, comm2d, ierr )
1570	ngp_3d_inner = INT( ngp_3d_inner_tmp, KIND = SELECTED_INT_KIND( 18 ) )
1571	#else
1572	ngp_2dh = ngp_2dh_l
1573	ngp_2dh_outer = ngp_2dh_outer_l
1574	ngp_2dh_s_inner = ngp_2dh_s_inner_l
1575	ngp_3d_inner = INT( ngp_3d_inner_l, KIND = SELECTED_INT_KIND( 18 ) )
1576	#endif
1577
1578	ngp_3d = INT ( ngp_2dh, KIND = SELECTED_INT_KIND( 18 ) ) * &
1579	INT ( (nz + 2 ), KIND = SELECTED_INT_KIND( 18 ) )
1580
1581	!
1582	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
1583	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
1584	!-- the respective subdomain lie below the surface topography
1585	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
1586	ngp_3d_inner = MAX( 1, ngp_3d_inner(:) )
1587	ngp_2dh_s_inner = MAX( 1, ngp_2dh_s_inner(:,:) )
1588
1589	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l, ngp_3d_inner_tmp )
1590
1591
1592	END SUBROUTINE init_3d_model

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