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source: palm/trunk/SOURCE/init_3d_model.f90 @ 48

Last change on this file since 48 was 48, checked in by raasch, 17 years ago
preliminary version, several changes to be explained later
Property svn:keywords set to `Id`
File size: 30.1 KB

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1	#if defined( __ibmy_special )
2	@PROCESS NOOPTimize
3	#endif
4	SUBROUTINE init_3d_model
5
6	!------------------------------------------------------------------------------!
7	! Actual revisions:
8	! -----------------
9	! New initializing action "by_user" calls user_init_3d_model,
10	! ts_value is allocated
11	!
12	! Former revisions:
13	! -----------------
14	! $Id: init_3d_model.f90 48 2007-03-06 12:28:36Z raasch $
15	!
16	! 19 2007-02-23 04:53:48Z raasch
17	! +handling of top fluxes
18	!
19	! RCS Log replace by Id keyword, revision history cleaned up
20	!
21	! Revision 1.49 2006/08/22 15:59:07 raasch
22	! No optimization of this file on the ibmy (Yonsei Univ.)
23	!
24	! Revision 1.1 1998/03/09 16:22:22 raasch
25	! Initial revision
26	!
27	!
28	! Description:
29	! ------------
30	! Allocation of arrays and initialization of the 3D model via
31	! a) pre-run the 1D model
32	! or
33	! b) pre-set constant linear profiles
34	! or
35	! c) read values of a previous run
36	!------------------------------------------------------------------------------!
37
38	USE arrays_3d
39	USE averaging
40	USE constants
41	USE control_parameters
42	USE cpulog
43	USE indices
44	USE interfaces
45	USE model_1d
46	USE particle_attributes
47	USE pegrid
48	USE profil_parameter
49	USE random_function_mod
50	USE statistics
51
52	IMPLICIT NONE
53
54	INTEGER :: i, j, k, sr
55
56	INTEGER, DIMENSION(:), ALLOCATABLE :: ngp_2dh_l, ngp_3d_inner_l
57
58	INTEGER, DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l
59
60	REAL, DIMENSION(1:2) :: volume_flow_area_l, volume_flow_initial_l
61
62
63	!
64	!-- Allocate arrays
65	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
66	ngp_3d(0:statistic_regions), &
67	ngp_3d_inner(0:statistic_regions), &
68	ngp_3d_inner_l(0:statistic_regions), &
69	sums_divnew_l(0:statistic_regions), &
70	sums_divold_l(0:statistic_regions) )
71	ALLOCATE( rdf(nzb+1:nzt), uvmean_outflow(nzb:nzt+1), &
72	uvmean_outflow_l(nzb:nzt+1) )
73	ALLOCATE( hom_sum(nzb:nzt+1,var_hom,0:statistic_regions), &
74	ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
75	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
76	rmask(nys-1:nyn+1,nxl-1:nxr+1,0:statistic_regions), &
77	sums(nzb:nzt+1,var_sum), &
78	sums_l(nzb:nzt+1,var_sum,0:threads_per_task-1), &
79	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
80	sums_up_fraction_l(10,3,0:statistic_regions), &
81	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions), &
82	ts_value(var_ts,0:statistic_regions) )
83	ALLOCATE( km_damp_x(nxl-1:nxr+1), km_damp_y(nys-1:nyn+1) )
84
85	ALLOCATE( rif_1(nys-1:nyn+1,nxl-1:nxr+1), shf_1(nys-1:nyn+1,nxl-1:nxr+1), &
86	ts(nys-1:nyn+1,nxl-1:nxr+1), tswst_1(nys-1:nyn+1,nxl-1:nxr+1), &
87	us(nys-1:nyn+1,nxl-1:nxr+1), usws_1(nys-1:nyn+1,nxl-1:nxr+1), &
88	vsws_1(nys-1:nyn+1,nxl-1:nxr+1), z0(nys-1:nyn+1,nxl-1:nxr+1) )
89
90	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
91	!
92	!-- Leapfrog scheme needs two timelevels of diffusion quantities
93	ALLOCATE( rif_2(nys-1:nyn+1,nxl-1:nxr+1), &
94	shf_2(nys-1:nyn+1,nxl-1:nxr+1), &
95	tswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
96	usws_2(nys-1:nyn+1,nxl-1:nxr+1), &
97	vsws_2(nys-1:nyn+1,nxl-1:nxr+1) )
98	ENDIF
99
100	ALLOCATE( d(nzb+1:nzta,nys:nyna,nxl:nxra), &
101	e_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
102	e_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
103	e_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
104	kh_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
105	km_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
106	p(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
107	pt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
108	pt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
109	pt_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
110	tend(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
111	u_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
112	u_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
113	u_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
114	v_1(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
115	v_2(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
116	v_3(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
117	w_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
118	w_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
119	w_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
120
121	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
122	ALLOCATE( kh_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
123	km_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
124	ENDIF
125
126	IF ( moisture .OR. passive_scalar ) THEN
127	!
128	!-- 2D-moisture/scalar arrays
129	ALLOCATE ( qs(nys-1:nyn+1,nxl-1:nxr+1), &
130	qsws_1(nys-1:nyn+1,nxl-1:nxr+1), &
131	qswst_1(nys-1:nyn+1,nxl-1:nxr+1) )
132
133	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
134	ALLOCATE( qsws_2(nys-1:nyn+1,nxl-1:nxr+1), &
135	qswst_2(nys-1:nyn+1,nxl-1:nxr+1) )
136	ENDIF
137	!
138	!-- 3D-moisture/scalar arrays
139	ALLOCATE( q_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
140	q_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
141	q_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
142
143	!
144	!-- 3D-arrays needed for moisture only
145	IF ( moisture ) THEN
146	ALLOCATE( vpt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
147
148	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
149	ALLOCATE( vpt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
150	ENDIF
151
152	IF ( cloud_physics ) THEN
153	!
154	!-- Liquid water content
155	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
156	ENDIF
157
158	IF ( cloud_droplets ) THEN
159	!
160	!-- Liquid water content, change in liquid water content,
161	!-- real volume of particles (with weighting), volume of particles
162	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
163	ql_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
164	ql_v(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
165	ql_vp(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
166	ENDIF
167
168	ENDIF
169
170	ENDIF
171
172	!
173	!-- 3D-array for storing the dissipation, needed for calculating the sgs
174	!-- particle velocities
175	IF ( use_sgs_for_particles ) THEN
176	ALLOCATE ( diss(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
177	ENDIF
178
179	IF ( dt_dosp /= 9999999.9 ) THEN
180	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
181	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
182	ENDIF
183
184	!
185	!-- Initial assignment of the pointers
186	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
187
188	rif_m => rif_1; rif => rif_2
189	shf_m => shf_1; shf => shf_2
190	tswst_m => tswst_1; tswst => tswst_2
191	usws_m => usws_1; usws => usws_2
192	vsws_m => vsws_1; vsws => vsws_2
193	e_m => e_1; e => e_2; e_p => e_3; te_m => e_3
194	kh_m => kh_1; kh => kh_2
195	km_m => km_1; km => km_2
196	pt_m => pt_1; pt => pt_2; pt_p => pt_3; tpt_m => pt_3
197	u_m => u_1; u => u_2; u_p => u_3; tu_m => u_3
198	v_m => v_1; v => v_2; v_p => v_3; tv_m => v_3
199	w_m => w_1; w => w_2; w_p => w_3; tw_m => w_3
200
201	IF ( moisture .OR. passive_scalar ) THEN
202	qsws_m => qsws_1; qsws => qsws_2
203	qswst_m => qswst_1; qswst => qswst_2
204	q_m => q_1; q => q_2; q_p => q_3; tq_m => q_3
205	IF ( moisture ) vpt_m => vpt_1; vpt => vpt_2
206	IF ( cloud_physics ) ql => ql_1
207	IF ( cloud_droplets ) THEN
208	ql => ql_1
209	ql_c => ql_2
210	ENDIF
211	ENDIF
212
213	ELSE
214
215	rif => rif_1
216	shf => shf_1
217	tswst => tswst_1
218	usws => usws_1
219	vsws => vsws_1
220	e => e_1; e_p => e_2; te_m => e_3; e_m => e_3
221	kh => kh_1
222	km => km_1
223	pt => pt_1; pt_p => pt_2; tpt_m => pt_3; pt_m => pt_3
224	u => u_1; u_p => u_2; tu_m => u_3; u_m => u_3
225	v => v_1; v_p => v_2; tv_m => v_3; v_m => v_3
226	w => w_1; w_p => w_2; tw_m => w_3; w_m => w_3
227
228	IF ( moisture .OR. passive_scalar ) THEN
229	qsws => qsws_1
230	qswst => qswst_1
231	q => q_1; q_p => q_2; tq_m => q_3; q_m => q_3
232	IF ( moisture ) vpt => vpt_1
233	IF ( cloud_physics ) ql => ql_1
234	IF ( cloud_droplets ) THEN
235	ql => ql_1
236	ql_c => ql_2
237	ENDIF
238	ENDIF
239
240	ENDIF
241
242	!
243	!-- Initialize model variables
244	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
245	!
246	!-- First model run of a possible job queue.
247	!-- Initial profiles of the variables must be computes.
248	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
249	!
250	!-- Use solutions of the 1D model as initial profiles,
251	!-- start 1D model
252	CALL init_1d_model
253	!
254	!-- Transfer initial profiles to the arrays of the 3D model
255	DO i = nxl-1, nxr+1
256	DO j = nys-1, nyn+1
257	e(:,j,i) = e1d
258	kh(:,j,i) = kh1d
259	km(:,j,i) = km1d
260	pt(:,j,i) = pt_init
261	ENDDO
262	ENDDO
263	DO i = nxl-1, nxr+uxrp+1
264	DO j = nys-1, nyn+1
265	u(:,j,i) = u1d
266	ENDDO
267	ENDDO
268	DO i = nxl-1, nxr+1
269	DO j = nys-1, nyn+vynp+1
270	v(:,j,i) = v1d
271	ENDDO
272	ENDDO
273
274	IF ( moisture .OR. passive_scalar ) THEN
275	DO i = nxl-1, nxr+1
276	DO j = nys-1, nyn+1
277	q(:,j,i) = q_init
278	ENDDO
279	ENDDO
280	ENDIF
281
282	IF ( .NOT. constant_diffusion ) THEN
283	DO i = nxl-1, nxr+1
284	DO j = nys-1, nyn+1
285	e(:,j,i) = e1d
286	ENDDO
287	ENDDO
288	!
289	!-- Store initial profiles for output purposes etc.
290	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
291
292	IF ( prandtl_layer ) THEN
293	rif = rif1d(nzb+1)
294	ts = 0.0 ! could actually be computed more accurately in the
295	! 1D model. Update when opportunity arises.
296	us = us1d
297	usws = usws1d
298	vsws = vsws1d
299	ELSE
300	ts = 0.0 ! must be set, because used in
301	rif = 0.0 ! flowste
302	us = 0.0
303	usws = 0.0
304	vsws = 0.0
305	ENDIF
306
307	ELSE
308	e = 0.0 ! must be set, because used in
309	rif = 0.0 ! flowste
310	ts = 0.0
311	us = 0.0
312	usws = 0.0
313	vsws = 0.0
314	ENDIF
315
316	!
317	!-- In every case qs = 0.0 (see also pt)
318	!-- This could actually be computed more accurately in the 1D model.
319	!-- Update when opportunity arises!
320	IF ( moisture .OR. passive_scalar ) qs = 0.0
321
322	!
323	!-- inside buildings set velocities back to zero
324	IF ( topography /= 'flat' ) THEN
325	DO i = nxl-1, nxr+1
326	DO j = nys-1, nyn+1
327	u(nzb:nzb_u_inner(j,i),j,i) = 0.0
328	v(nzb:nzb_v_inner(j,i),j,i) = 0.0
329	ENDDO
330	ENDDO
331	!
332	!-- WARNING: The extra boundary conditions set after running the
333	!-- ------- 1D model impose an error on the divergence one layer
334	!-- below the topography; need to correct later
335	!-- ATTENTION: Provisional correction for Piacsek & Williams
336	!-- --------- advection scheme: keep u and v zero one layer below
337	!-- the topography.
338	IF ( ibc_uv_b == 0 ) THEN
339	!
340	!-- Satisfying the Dirichlet condition with an extra layer below
341	!-- the surface where the u and v component change their sign.
342	DO i = nxl-1, nxr+1
343	DO j = nys-1, nyn+1
344	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = -u(1,j,i)
345	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = -v(1,j,i)
346	ENDDO
347	ENDDO
348
349	ELSE
350	!
351	!-- Neumann condition
352	DO i = nxl-1, nxr+1
353	DO j = nys-1, nyn+1
354	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
355	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
356	ENDDO
357	ENDDO
358
359	ENDIF
360
361	ENDIF
362
363	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
364	THEN
365	!
366	!-- Use constructed initial profiles (velocity constant with height,
367	!-- temperature profile with constant gradient)
368	DO i = nxl-1, nxr+1
369	DO j = nys-1, nyn+1
370	pt(:,j,i) = pt_init
371	ENDDO
372	ENDDO
373	DO i = nxl-1, nxr+uxrp+1
374	DO j = nys-1, nyn+1
375	u(:,j,i) = u_init
376	ENDDO
377	ENDDO
378	DO i = nxl-1, nxr+1
379	DO j = nys-1, nyn+vynp+1
380	v(:,j,i) = v_init
381	ENDDO
382	ENDDO
383	!
384	!-- Set initial horizontal velocities at the lowest grid levels to zero
385	!-- in order to avoid too small time steps caused by the diffusion
386	!-- limit in the initial phase of a run (at k=1, dz/2 occurs in the
387	!-- limiting formula!)
388	DO i = nxl-1, nxr+1
389	DO j = nys-1, nyn+1
390	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0
391	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0
392	ENDDO
393	ENDDO
394
395	IF ( moisture .OR. passive_scalar ) THEN
396	DO i = nxl-1, nxr+1
397	DO j = nys-1, nyn+1
398	q(:,j,i) = q_init
399	ENDDO
400	ENDDO
401	ENDIF
402
403
404	IF ( constant_diffusion ) THEN
405	km = km_constant
406	kh = km / prandtl_number
407	ELSE
408	kh = 0.01 ! there must exist an initial diffusion, because
409	km = 0.01 ! otherwise no TKE would be produced by the
410	! production terms, as long as not yet
411	! e = (u/cm)*2 at k=nzb+1
412	ENDIF
413	e = 0.0
414	rif = 0.0
415	ts = 0.0
416	us = 0.0
417	usws = 0.0
418	vsws = 0.0
419	IF ( moisture .OR. passive_scalar ) qs = 0.0
420
421	!
422	!-- Compute initial temperature field and other constants used in case
423	!-- of a sloping surface
424	IF ( sloping_surface ) CALL init_slope
425
426	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
427	THEN
428	!
429	!-- Initialization will completely be done by the user
430	CALL user_init_3d_model
431
432	ENDIF
433
434	!
435	!-- Calculate virtual potential temperature
436	IF ( moisture ) vpt = pt * ( 1.0 + 0.61 * q )
437
438	!
439	!-- Store initial profiles for output purposes etc.
440	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
441	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
442	IF ( ibc_uv_b == 0 ) THEN
443	hom(nzb,1,5,:) = -hom(nzb+1,1,5,:) ! due to satisfying the Dirichlet
444	hom(nzb,1,6,:) = -hom(nzb+1,1,6,:) ! condition with an extra layer
445	! below the surface where the u and v component change their sign
446	ENDIF
447	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
448	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
449	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
450
451
452	IF ( moisture ) THEN
453	!
454	!-- Store initial profile of total water content, virtual potential
455	!-- temperature
456	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
457	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
458	IF ( cloud_physics .OR. cloud_droplets ) THEN
459	!
460	!-- Store initial profile of specific humidity and potential
461	!-- temperature
462	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
463	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
464	ENDIF
465	ENDIF
466
467	IF ( passive_scalar ) THEN
468	!
469	!-- Store initial scalar profile
470	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
471	ENDIF
472
473	!
474	!-- Initialize fluxes at bottom surface
475	IF ( use_surface_fluxes ) THEN
476
477	IF ( constant_heatflux ) THEN
478	!
479	!-- Heat flux is prescribed
480	IF ( random_heatflux ) THEN
481	CALL disturb_heatflux
482	ELSE
483	shf = surface_heatflux
484	!
485	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
486	IF ( TRIM( topography ) /= 'flat' ) THEN
487	DO i = nxl-1, nxr+1
488	DO j = nys-1, nyn+1
489	IF ( nzb_s_inner(j,i) /= 0 ) THEN
490	shf(j,i) = wall_heatflux(0)
491	ENDIF
492	ENDDO
493	ENDDO
494	ENDIF
495	ENDIF
496	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
497	ENDIF
498
499	!
500	!-- Determine the near-surface water flux
501	IF ( moisture .OR. passive_scalar ) THEN
502	IF ( constant_waterflux ) THEN
503	qsws = surface_waterflux
504	IF ( ASSOCIATED( qsws_m ) ) qsws_m = qsws
505	ENDIF
506	ENDIF
507
508	ENDIF
509
510	!
511	!-- Initialize fluxes at top surface
512	!-- Currently, only the heatflux can be prescribed. The latent flux is
513	!-- zero in this case!
514	IF ( use_top_fluxes ) THEN
515
516	IF ( constant_top_heatflux ) THEN
517	!
518	!-- Heat flux is prescribed
519	tswst = top_heatflux
520	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
521
522	IF ( moisture .OR. passive_scalar ) THEN
523	qswst = 0.0
524	IF ( ASSOCIATED( qswst_m ) ) qswst_m = qswst
525	ENDIF
526	ENDIF
527
528	ENDIF
529
530	!
531	!-- Initialize Prandtl layer quantities
532	IF ( prandtl_layer ) THEN
533
534	z0 = roughness_length
535
536	IF ( .NOT. constant_heatflux ) THEN
537	!
538	!-- Surface temperature is prescribed. Here the heat flux cannot be
539	!-- simply estimated, because therefore rif, u* and theta* would have
540	!-- to be computed by iteration. This is why the heat flux is assumed
541	!-- to be zero before the first time step. It approaches its correct
542	!-- value in the course of the first few time steps.
543	shf = 0.0
544	IF ( ASSOCIATED( shf_m ) ) shf_m = 0.0
545	ENDIF
546
547	IF ( moisture .OR. passive_scalar ) THEN
548	IF ( .NOT. constant_waterflux ) THEN
549	qsws = 0.0
550	IF ( ASSOCIATED( qsws_m ) ) qsws_m = 0.0
551	ENDIF
552	ENDIF
553
554	ENDIF
555
556	!
557	!-- Calculate the initial volume flow at the right and north boundary
558	IF ( conserve_volume_flow ) THEN
559
560	volume_flow_initial_l = 0.0
561	volume_flow_area_l = 0.0
562
563	IF ( nxr == nx ) THEN
564	DO j = nys, nyn
565	DO k = nzb_2d(j,nx) + 1, nzt
566	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
567	u(k,j,nx) * dzu(k)
568	volume_flow_area_l(1) = volume_flow_area_l(1) + dzu(k)
569	ENDDO
570	ENDDO
571	ENDIF
572
573	IF ( nyn == ny ) THEN
574	DO i = nxl, nxr
575	DO k = nzb_2d(ny,i) + 1, nzt
576	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
577	v(k,ny,i) * dzu(k)
578	volume_flow_area_l(2) = volume_flow_area_l(2) + dzu(k)
579	ENDDO
580	ENDDO
581	ENDIF
582
583	#if defined( __parallel )
584	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
585	2, MPI_REAL, MPI_SUM, comm2d, ierr )
586	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
587	2, MPI_REAL, MPI_SUM, comm2d, ierr )
588	#else
589	volume_flow_initial = volume_flow_initial_l
590	volume_flow_area = volume_flow_area_l
591	#endif
592	ENDIF
593
594	!
595	!-- For the moment, perturbation pressure and vertical velocity are zero
596	p = 0.0; w = 0.0
597
598	!
599	!-- Initialize array sums (must be defined in first call of pres)
600	sums = 0.0
601
602	!
603	!-- Treating cloud physics, liquid water content is zero at beginning of
604	!-- the simulation
605	IF ( cloud_physics ) ql = 0.0
606
607	!
608	!-- Initialize spectra
609	IF ( dt_dosp /= 9999999.9 ) THEN
610	spectrum_x = 0.0
611	spectrum_y = 0.0
612	ENDIF
613
614	!
615	!-- Impose vortex with vertical axis on the initial velocity profile
616	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
617	CALL init_rankine
618	ENDIF
619
620	!
621	!-- Impose temperature anomaly (advection test only)
622	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
623	CALL init_pt_anomaly
624	ENDIF
625
626	!
627	!-- If required, change the surface temperature at the start of the 3D run
628	IF ( pt_surface_initial_change /= 0.0 ) THEN
629	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
630	ENDIF
631
632	!
633	!-- If required, change the surface humidity/scalar at the start of the 3D
634	!-- run
635	IF ( ( moisture .OR. passive_scalar ) .AND. &
636	q_surface_initial_change /= 0.0 ) THEN
637	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
638	ENDIF
639
640	!
641	!-- Initialize the random number generator (from numerical recipes)
642	CALL random_function_ini
643
644	!
645	!-- Impose random perturbation on the horizontal velocity field and then
646	!-- remove the divergences from the velocity field
647	IF ( create_disturbances ) THEN
648	CALL disturb_field( nzb_u_inner, tend, u, uxrp, 0 )
649	CALL disturb_field( nzb_v_inner, tend, v, 0, vynp )
650	n_sor = nsor_ini
651	CALL pres
652	n_sor = nsor
653	ENDIF
654
655	!
656	!-- Once again set the perturbation pressure explicitly to zero in order to
657	!-- assure that it does not generate any divergences in the first time step.
658	!-- At t=0 the velocity field is free of divergence (as constructed above).
659	!-- Divergences being created during a time step are not yet known and thus
660	!-- cannot be corrected during the time step yet.
661	p = 0.0
662
663	!
664	!-- Initialize old and new time levels.
665	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
666	e_m = e; pt_m = pt; u_m = u; v_m = v; w_m = w; kh_m = kh; km_m = km
667	ELSE
668	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
669	ENDIF
670	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
671
672	IF ( moisture .OR. passive_scalar ) THEN
673	IF ( ASSOCIATED( q_m ) ) q_m = q
674	IF ( timestep_scheme(1:5) == 'runge' ) tq_m = 0.0
675	q_p = q
676	IF ( moisture .AND. ASSOCIATED( vpt_m ) ) vpt_m = vpt
677	ENDIF
678
679	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' ) &
680	THEN
681	!
682	!-- Read binary data from restart file
683	CALL read_3d_binary
684
685	!
686	!-- Calculate initial temperature field and other constants used in case
687	!-- of a sloping surface
688	IF ( sloping_surface ) CALL init_slope
689
690	!
691	!-- Initialize new time levels (only done in order to set boundary values
692	!-- including ghost points)
693	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
694	IF ( moisture .OR. passive_scalar ) q_p = q
695
696	ELSE
697	!
698	!-- Actually this part of the programm should not be reached
699	IF ( myid == 0 ) PRINT*,'+++ init_3d_model: unknown initializing ', &
700	'problem'
701	CALL local_stop
702	ENDIF
703
704	!
705	!-- If required, initialize dvrp-software
706	! WRITE ( 9, * ) '*** myid=', myid, ' vor init_dvrp'
707	! CALL FLUSH_( 9 )
708	IF ( dt_dvrp /= 9999999.9 ) CALL init_dvrp
709	! WRITE ( 9, * ) '*** myid=', myid, ' nach init_dvrp'
710	! CALL FLUSH_( 9 )
711
712	!
713	!-- If required, initialize quantities for handling cloud physics
714	!-- This routine must be called before init_particles, because
715	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
716	!-- init_particles) is not defined.
717	CALL init_cloud_physics
718
719	!
720	!-- If required, initialize particles
721	! WRITE ( 9, * ) '*** myid=', myid, ' vor init_particles'
722	! CALL FLUSH_( 9 )
723	CALL init_particles
724	! WRITE ( 9, * ) '*** myid=', myid, ' nach init_particles'
725	! CALL FLUSH_( 9 )
726
727	!
728	!-- Initialize quantities for special advections schemes
729	CALL init_advec
730
731	!
732	!-- Initialize Rayleigh damping factors
733	rdf = 0.0
734	IF ( rayleigh_damping_factor /= 0.0 ) THEN
735	DO k = nzb+1, nzt
736	IF ( zu(k) >= rayleigh_damping_height ) THEN
737	rdf(k) = rayleigh_damping_factor * &
738	( SIN( pi * 0.5 * ( zu(k) - rayleigh_damping_height ) &
739	/ ( zu(nzt) - rayleigh_damping_height ) )&
740	)**2
741	ENDIF
742	ENDDO
743	ENDIF
744
745	!
746	!-- Initialize diffusivities used within the outflow damping layer in case of
747	!-- non-cyclic lateral boundaries. A linear increase is assumed over the first
748	!-- half of the width of the damping layer
749	IF ( bc_lr /= 'cyclic' ) THEN
750
751	DO i = nxl-1, nxr+1
752
753	IF ( outflow_r ) THEN
754
755	IF ( i >= nx - outflow_damping_width ) THEN
756	km_damp_x(i) = km_damp_max * MIN( 1.0, &
757	( i - ( nx - outflow_damping_width ) ) / &
758	REAL( outflow_damping_width/2 ) &
759	)
760	ELSE
761	km_damp_x(i) = 0.0
762	ENDIF
763
764	ELSEIF ( outflow_l ) THEN
765
766	IF ( i <= outflow_damping_width ) THEN
767	km_damp_x(i) = km_damp_max * MIN( 1.0, &
768	( outflow_damping_width - i ) / &
769	REAL( outflow_damping_width/2 ) &
770	)
771	ELSE
772	km_damp_x(i) = 0.0
773	ENDIF
774
775	ENDIF
776
777	ENDDO
778	ENDIF
779
780	IF ( bc_ns /= 'cyclic' ) THEN
781
782	DO j = nys-1, nyn+1
783
784	IF ( outflow_n ) THEN
785
786	IF ( j >= ny - outflow_damping_width ) THEN
787	km_damp_y(j) = km_damp_max * MIN( 1.0, &
788	( j - ( ny - outflow_damping_width ) ) / &
789	REAL( outflow_damping_width/2 ) &
790	)
791	ELSE
792	km_damp_y(j) = 0.0
793	ENDIF
794
795	ELSEIF ( outflow_s ) THEN
796
797	IF ( j <= outflow_damping_width ) THEN
798	km_damp_y(j) = km_damp_max * MIN( 1.0, &
799	( outflow_damping_width - j ) / &
800	REAL( outflow_damping_width/2 ) &
801	)
802	ELSE
803	km_damp_y(j) = 0.0
804	ENDIF
805
806	ENDIF
807
808	ENDDO
809	ENDIF
810
811	!
812	!-- Initialize local summation arrays for UP flow_statistics. This is necessary
813	!-- because they may not yet have been initialized when they are called from
814	!-- flow_statistics (or - depending on the chosen model run - are never
815	!-- initialized)
816	sums_divnew_l = 0.0
817	sums_divold_l = 0.0
818	sums_l_l = 0.0
819	sums_up_fraction_l = 0.0
820	sums_wsts_bc_l = 0.0
821
822	!
823	!-- Pre-set masks for regional statistics. Default is the total model domain.
824	rmask = 1.0
825
826	!
827	!-- User-defined initializing actions
828	CALL user_init
829
830	!
831	!-- Input binary data file is not needed anymore. This line must be placed
832	!-- after call of user_init!
833	CALL close_file( 13 )
834
835	!
836	!-- Compute total sum of active mask grid points
837	!-- ngp_2dh: number of grid points of a horizontal cross section through the
838	!-- total domain
839	!-- ngp_3d: number of grid points of the total domain
840	!-- Note: The lower vertical index nzb_s_outer imposes a small error on the 2D
841	!-- ---- averages of staggered variables such as u and v due to the topography
842	!-- arrangement on the staggered grid. Maybe revise later.
843	ngp_2dh_outer_l = 0
844	ngp_2dh_outer = 0
845	ngp_2dh_l = 0
846	ngp_2dh = 0
847	ngp_3d_inner_l = 0
848	ngp_3d_inner = 0
849	ngp_3d = 0
850	ngp_sums = ( nz + 2 ) * var_sum
851
852	DO sr = 0, statistic_regions
853	DO i = nxl, nxr
854	DO j = nys, nyn
855	IF ( rmask(j,i,sr) == 1.0 ) THEN
856	!
857	!-- All xy-grid points
858	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
859	!
860	!-- xy-grid points above topography
861	DO k = nzb_s_outer(j,i), nz + 1
862	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
863	ENDDO
864	!
865	!-- All grid points of the total domain above topography
866	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
867	( nz - nzb_s_inner(j,i) + 2 )
868	ENDIF
869	ENDDO
870	ENDDO
871	ENDDO
872
873	sr = statistic_regions + 1
874	#if defined( __parallel )
875	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
876	comm2d, ierr )
877	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
878	MPI_INTEGER, MPI_SUM, comm2d, ierr )
879	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner(0), sr, MPI_INTEGER, &
880	MPI_SUM, comm2d, ierr )
881	#else
882	ngp_2dh = ngp_2dh_l
883	ngp_2dh_outer = ngp_2dh_outer_l
884	ngp_3d_inner = ngp_3d_inner_l
885	#endif
886
887	ngp_3d = ngp_2dh * ( nz + 2 )
888
889	!
890	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
891	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
892	!-- the respective subdomain lie below the surface topography
893	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
894	ngp_3d_inner = MAX( 1, ngp_3d_inner(:) )
895
896	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l )
897
898
899	END SUBROUTINE init_3d_model

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