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source: palm/trunk/SOURCE/init_3d_model.f90 @ 30

Last change on this file since 30 was 19, checked in by raasch, 18 years ago
preliminary version of modified boundary conditions at top
Property svn:keywords set to `Id`
File size: 29.7 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	! +handling of top fluxes
10	!
11	! Former revisions:
12	! -----------------
13	! $Id: init_3d_model.f90 19 2007-02-23 04:53:48Z raasch $
14	! RCS Log replace by Id keyword, revision history cleaned up
15	!
16	! Revision 1.49 2006/08/22 15:59:07 raasch
17	! No optimization of this file on the ibmy (Yonsei Univ.)
18	!
19	! Revision 1.1 1998/03/09 16:22:22 raasch
20	! Initial revision
21	!
22	!
23	! Description:
24	! ------------
25	! Allocation of arrays and initialization of the 3D model via
26	! a) pre-run the 1D model
27	! or
28	! b) pre-set constant linear profiles
29	! or
30	! c) read values of a previous run
31	!------------------------------------------------------------------------------!
32
33	USE arrays_3d
34	USE averaging
35	USE constants
36	USE control_parameters
37	USE cpulog
38	USE indices
39	USE interfaces
40	USE model_1d
41	USE particle_attributes
42	USE pegrid
43	USE profil_parameter
44	USE random_function_mod
45	USE statistics
46
47	IMPLICIT NONE
48
49	INTEGER :: i, j, k, sr
50
51	INTEGER, DIMENSION(:), ALLOCATABLE :: ngp_2dh_l, ngp_3d_inner_l
52
53	INTEGER, DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l
54
55	REAL, DIMENSION(1:2) :: volume_flow_area_l, volume_flow_initial_l
56
57
58	!
59	!-- Allocate arrays
60	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
61	ngp_3d(0:statistic_regions), &
62	ngp_3d_inner(0:statistic_regions), &
63	ngp_3d_inner_l(0:statistic_regions), &
64	sums_divnew_l(0:statistic_regions), &
65	sums_divold_l(0:statistic_regions) )
66	ALLOCATE( rdf(nzb+1:nzt), uvmean_outflow(nzb:nzt+1), &
67	uvmean_outflow_l(nzb:nzt+1) )
68	ALLOCATE( hom_sum(nzb:nzt+1,var_hom,0:statistic_regions), &
69	ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
70	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
71	rmask(nys-1:nyn+1,nxl-1:nxr+1,0:statistic_regions), &
72	sums(nzb:nzt+1,var_sum), &
73	sums_l(nzb:nzt+1,var_sum,0:threads_per_task-1), &
74	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
75	sums_up_fraction_l(10,3,0:statistic_regions), &
76	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions) )
77	ALLOCATE( km_damp_x(nxl-1:nxr+1), km_damp_y(nys-1:nyn+1) )
78
79	ALLOCATE( rif_1(nys-1:nyn+1,nxl-1:nxr+1), shf_1(nys-1:nyn+1,nxl-1:nxr+1), &
80	ts(nys-1:nyn+1,nxl-1:nxr+1), tswst_1(nys-1:nyn+1,nxl-1:nxr+1), &
81	us(nys-1:nyn+1,nxl-1:nxr+1), usws_1(nys-1:nyn+1,nxl-1:nxr+1), &
82	vsws_1(nys-1:nyn+1,nxl-1:nxr+1), z0(nys-1:nyn+1,nxl-1:nxr+1) )
83
84	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
85	!
86	!-- Leapfrog scheme needs two timelevels of diffusion quantities
87	ALLOCATE( rif_2(nys-1:nyn+1,nxl-1:nxr+1), &
88	shf_2(nys-1:nyn+1,nxl-1:nxr+1), &
89	tswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
90	usws_2(nys-1:nyn+1,nxl-1:nxr+1), &
91	vsws_2(nys-1:nyn+1,nxl-1:nxr+1) )
92	ENDIF
93
94	ALLOCATE( d(nzb+1:nzta,nys:nyna,nxl:nxra), &
95	e_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
96	e_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
97	e_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
98	kh_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
99	km_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
100	p(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
101	pt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
102	pt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
103	pt_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
104	tend(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
105	u_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
106	u_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
107	u_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
108	v_1(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
109	v_2(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
110	v_3(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
111	w_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
112	w_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
113	w_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
114
115	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
116	ALLOCATE( kh_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
117	km_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
118	ENDIF
119
120	IF ( moisture .OR. passive_scalar ) THEN
121	!
122	!-- 2D-moisture/scalar arrays
123	ALLOCATE ( qs(nys-1:nyn+1,nxl-1:nxr+1), &
124	qsws_1(nys-1:nyn+1,nxl-1:nxr+1), &
125	qswst_1(nys-1:nyn+1,nxl-1:nxr+1) )
126
127	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
128	ALLOCATE( qsws_2(nys-1:nyn+1,nxl-1:nxr+1), &
129	qswst_2(nys-1:nyn+1,nxl-1:nxr+1) )
130	ENDIF
131	!
132	!-- 3D-moisture/scalar arrays
133	ALLOCATE( q_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
134	q_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
135	q_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
136
137	!
138	!-- 3D-arrays needed for moisture only
139	IF ( moisture ) THEN
140	ALLOCATE( vpt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
141
142	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
143	ALLOCATE( vpt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
144	ENDIF
145
146	IF ( cloud_physics ) THEN
147	!
148	!-- Liquid water content
149	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
150	ENDIF
151
152	IF ( cloud_droplets ) THEN
153	!
154	!-- Liquid water content, change in liquid water content,
155	!-- real volume of particles (with weighting), volume of particles
156	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
157	ql_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
158	ql_v(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
159	ql_vp(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
160	ENDIF
161
162	ENDIF
163
164	ENDIF
165
166	!
167	!-- 3D-array for storing the dissipation, needed for calculating the sgs
168	!-- particle velocities
169	IF ( use_sgs_for_particles ) THEN
170	ALLOCATE ( diss(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
171	ENDIF
172
173	IF ( dt_dosp /= 9999999.9 ) THEN
174	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
175	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
176	ENDIF
177
178	!
179	!-- Initial assignment of the pointers
180	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
181
182	rif_m => rif_1; rif => rif_2
183	shf_m => shf_1; shf => shf_2
184	tswst_m => tswst_1; tswst => tswst_2
185	usws_m => usws_1; usws => usws_2
186	vsws_m => vsws_1; vsws => vsws_2
187	e_m => e_1; e => e_2; e_p => e_3; te_m => e_3
188	kh_m => kh_1; kh => kh_2
189	km_m => km_1; km => km_2
190	pt_m => pt_1; pt => pt_2; pt_p => pt_3; tpt_m => pt_3
191	u_m => u_1; u => u_2; u_p => u_3; tu_m => u_3
192	v_m => v_1; v => v_2; v_p => v_3; tv_m => v_3
193	w_m => w_1; w => w_2; w_p => w_3; tw_m => w_3
194
195	IF ( moisture .OR. passive_scalar ) THEN
196	qsws_m => qsws_1; qsws => qsws_2
197	qswst_m => qswst_1; qswst => qswst_2
198	q_m => q_1; q => q_2; q_p => q_3; tq_m => q_3
199	IF ( moisture ) vpt_m => vpt_1; vpt => vpt_2
200	IF ( cloud_physics ) ql => ql_1
201	IF ( cloud_droplets ) THEN
202	ql => ql_1
203	ql_c => ql_2
204	ENDIF
205	ENDIF
206
207	ELSE
208
209	rif => rif_1
210	shf => shf_1
211	tswst => tswst_1
212	usws => usws_1
213	vsws => vsws_1
214	e => e_1; e_p => e_2; te_m => e_3; e_m => e_3
215	kh => kh_1
216	km => km_1
217	pt => pt_1; pt_p => pt_2; tpt_m => pt_3; pt_m => pt_3
218	u => u_1; u_p => u_2; tu_m => u_3; u_m => u_3
219	v => v_1; v_p => v_2; tv_m => v_3; v_m => v_3
220	w => w_1; w_p => w_2; tw_m => w_3; w_m => w_3
221
222	IF ( moisture .OR. passive_scalar ) THEN
223	qsws => qsws_1
224	qswst => qswst_1
225	q => q_1; q_p => q_2; tq_m => q_3; q_m => q_3
226	IF ( moisture ) vpt => vpt_1
227	IF ( cloud_physics ) ql => ql_1
228	IF ( cloud_droplets ) THEN
229	ql => ql_1
230	ql_c => ql_2
231	ENDIF
232	ENDIF
233
234	ENDIF
235
236	!
237	!-- Initialize model variables
238	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
239	!
240	!-- First model run of a possible job queue.
241	!-- Initial profiles of the variables must be computes.
242	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
243	!
244	!-- Use solutions of the 1D model as initial profiles,
245	!-- start 1D model
246	CALL init_1d_model
247	!
248	!-- Transfer initial profiles to the arrays of the 3D model
249	DO i = nxl-1, nxr+1
250	DO j = nys-1, nyn+1
251	e(:,j,i) = e1d
252	kh(:,j,i) = kh1d
253	km(:,j,i) = km1d
254	pt(:,j,i) = pt_init
255	ENDDO
256	ENDDO
257	DO i = nxl-1, nxr+uxrp+1
258	DO j = nys-1, nyn+1
259	u(:,j,i) = u1d
260	ENDDO
261	ENDDO
262	DO i = nxl-1, nxr+1
263	DO j = nys-1, nyn+vynp+1
264	v(:,j,i) = v1d
265	ENDDO
266	ENDDO
267
268	IF ( moisture .OR. passive_scalar ) THEN
269	DO i = nxl-1, nxr+1
270	DO j = nys-1, nyn+1
271	q(:,j,i) = q_init
272	ENDDO
273	ENDDO
274	ENDIF
275
276	IF ( .NOT. constant_diffusion ) THEN
277	DO i = nxl-1, nxr+1
278	DO j = nys-1, nyn+1
279	e(:,j,i) = e1d
280	ENDDO
281	ENDDO
282	!
283	!-- Store initial profiles for output purposes etc.
284	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
285
286	IF ( prandtl_layer ) THEN
287	rif = rif1d(nzb+1)
288	ts = 0.0 ! could actually be computed more accurately in the
289	! 1D model. Update when opportunity arises.
290	us = us1d
291	usws = usws1d
292	vsws = vsws1d
293	ELSE
294	ts = 0.0 ! must be set, because used in
295	rif = 0.0 ! flowste
296	us = 0.0
297	usws = 0.0
298	vsws = 0.0
299	ENDIF
300
301	ELSE
302	e = 0.0 ! must be set, because used in
303	rif = 0.0 ! flowste
304	ts = 0.0
305	us = 0.0
306	usws = 0.0
307	vsws = 0.0
308	ENDIF
309
310	!
311	!-- In every case qs = 0.0 (see also pt)
312	!-- This could actually be computed more accurately in the 1D model.
313	!-- Update when opportunity arises!
314	IF ( moisture .OR. passive_scalar ) qs = 0.0
315
316	!
317	!-- inside buildings set velocities back to zero
318	IF ( topography /= 'flat' ) THEN
319	DO i = nxl-1, nxr+1
320	DO j = nys-1, nyn+1
321	u(nzb:nzb_u_inner(j,i),j,i) = 0.0
322	v(nzb:nzb_v_inner(j,i),j,i) = 0.0
323	ENDDO
324	ENDDO
325	!
326	!-- WARNING: The extra boundary conditions set after running the
327	!-- ------- 1D model impose an error on the divergence one layer
328	!-- below the topography; need to correct later
329	!-- ATTENTION: Provisional correction for Piacsek & Williams
330	!-- --------- advection scheme: keep u and v zero one layer below
331	!-- the topography.
332	IF ( ibc_uv_b == 0 ) THEN
333	!
334	!-- Satisfying the Dirichlet condition with an extra layer below
335	!-- the surface where the u and v component change their sign.
336	DO i = nxl-1, nxr+1
337	DO j = nys-1, nyn+1
338	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = -u(1,j,i)
339	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = -v(1,j,i)
340	ENDDO
341	ENDDO
342
343	ELSE
344	!
345	!-- Neumann condition
346	DO i = nxl-1, nxr+1
347	DO j = nys-1, nyn+1
348	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
349	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
350	ENDDO
351	ENDDO
352
353	ENDIF
354
355	ENDIF
356
357	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
358	THEN
359	!
360	!-- Use constructed initial profiles (velocity constant with height,
361	!-- temperature profile with constant gradient)
362	DO i = nxl-1, nxr+1
363	DO j = nys-1, nyn+1
364	pt(:,j,i) = pt_init
365	ENDDO
366	ENDDO
367	DO i = nxl-1, nxr+uxrp+1
368	DO j = nys-1, nyn+1
369	u(:,j,i) = u_init
370	ENDDO
371	ENDDO
372	DO i = nxl-1, nxr+1
373	DO j = nys-1, nyn+vynp+1
374	v(:,j,i) = v_init
375	ENDDO
376	ENDDO
377	!
378	!-- Set initial horizontal velocities at the lowest grid levels to zero
379	!-- in order to avoid too small time steps caused by the diffusion
380	!-- limit in the initial phase of a run (at k=1, dz/2 occurs in the
381	!-- limiting formula!)
382	DO i = nxl-1, nxr+1
383	DO j = nys-1, nyn+1
384	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0
385	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0
386	ENDDO
387	ENDDO
388
389	IF ( moisture .OR. passive_scalar ) THEN
390	DO i = nxl-1, nxr+1
391	DO j = nys-1, nyn+1
392	q(:,j,i) = q_init
393	ENDDO
394	ENDDO
395	ENDIF
396
397
398	IF ( constant_diffusion ) THEN
399	km = km_constant
400	kh = km / prandtl_number
401	ELSE
402	kh = 0.01 ! there must exist an initial diffusion, because
403	km = 0.01 ! otherwise no TKE would be produced by the
404	! production terms, as long as not yet
405	! e = (u/cm)*2 at k=nzb+1
406	ENDIF
407	e = 0.0
408	rif = 0.0
409	ts = 0.0
410	us = 0.0
411	usws = 0.0
412	vsws = 0.0
413	IF ( moisture .OR. passive_scalar ) qs = 0.0
414
415	!
416	!-- Compute initial temperature field and other constants used in case
417	!-- of a sloping surface
418	IF ( sloping_surface ) CALL init_slope
419
420	ENDIF
421
422	!
423	!-- Calculate virtual potential temperature
424	IF ( moisture ) vpt = pt * ( 1.0 + 0.61 * q )
425
426	!
427	!-- Store initial profiles for output purposes etc.
428	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
429	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
430	IF ( ibc_uv_b == 0 ) THEN
431	hom(nzb,1,5,:) = -hom(nzb+1,1,5,:) ! due to satisfying the Dirichlet
432	hom(nzb,1,6,:) = -hom(nzb+1,1,6,:) ! condition with an extra layer
433	! below the surface where the u and v component change their sign
434	ENDIF
435	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
436	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
437	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
438
439
440	IF ( moisture ) THEN
441	!
442	!-- Store initial profile of total water content, virtual potential
443	!-- temperature
444	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
445	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
446	IF ( cloud_physics .OR. cloud_droplets ) THEN
447	!
448	!-- Store initial profile of specific humidity and potential
449	!-- temperature
450	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
451	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
452	ENDIF
453	ENDIF
454
455	IF ( passive_scalar ) THEN
456	!
457	!-- Store initial scalar profile
458	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
459	ENDIF
460
461	!
462	!-- Initialize fluxes at bottom surface
463	IF ( use_surface_fluxes ) THEN
464
465	IF ( constant_heatflux ) THEN
466	!
467	!-- Heat flux is prescribed
468	IF ( random_heatflux ) THEN
469	CALL disturb_heatflux
470	ELSE
471	shf = surface_heatflux
472	!
473	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
474	IF ( TRIM( topography ) /= 'flat' ) THEN
475	DO i = nxl-1, nxr+1
476	DO j = nys-1, nyn+1
477	IF ( nzb_s_inner(j,i) /= 0 ) THEN
478	shf(j,i) = wall_heatflux(0)
479	ENDIF
480	ENDDO
481	ENDDO
482	ENDIF
483	ENDIF
484	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
485	ENDIF
486
487	!
488	!-- Determine the near-surface water flux
489	IF ( moisture .OR. passive_scalar ) THEN
490	IF ( constant_waterflux ) THEN
491	qsws = surface_waterflux
492	IF ( ASSOCIATED( qsws_m ) ) qsws_m = qsws
493	ENDIF
494	ENDIF
495
496	ENDIF
497
498	!
499	!-- Initialize fluxes at top surface
500	!-- Currently, only the heatflux can be prescribed. The latent flux is
501	!-- zeri in this case!
502	IF ( use_top_fluxes ) THEN
503
504	IF ( constant_top_heatflux ) THEN
505	!
506	!-- Heat flux is prescribed
507	tswst = top_heatflux
508	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
509
510	IF ( moisture .OR. passive_scalar ) THEN
511	qswst = 0.0
512	IF ( ASSOCIATED( qswst_m ) ) qswst_m = qswst
513	ENDIF
514	ENDIF
515
516	ENDIF
517
518	!
519	!-- Initialize Prandtl layer quantities
520	IF ( prandtl_layer ) THEN
521
522	z0 = roughness_length
523
524	IF ( .NOT. constant_heatflux ) THEN
525	!
526	!-- Surface temperature is prescribed. Here the heat flux cannot be
527	!-- simply estimated, because therefore rif, u* and theta* would have
528	!-- to be computed by iteration. This is why the heat flux is assumed
529	!-- to be zero before the first time step. It approaches its correct
530	!-- value in the course of the first few time steps.
531	shf = 0.0
532	IF ( ASSOCIATED( shf_m ) ) shf_m = 0.0
533	ENDIF
534
535	IF ( moisture .OR. passive_scalar ) THEN
536	IF ( .NOT. constant_waterflux ) THEN
537	qsws = 0.0
538	IF ( ASSOCIATED( qsws_m ) ) qsws_m = 0.0
539	ENDIF
540	ENDIF
541
542	ENDIF
543
544	!
545	!-- Calculate the initial volume flow at the right and north boundary
546	IF ( conserve_volume_flow ) THEN
547
548	volume_flow_initial_l = 0.0
549	volume_flow_area_l = 0.0
550
551	IF ( nxr == nx ) THEN
552	DO j = nys, nyn
553	DO k = nzb_2d(j,nx) + 1, nzt
554	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
555	u(k,j,nx) * dzu(k)
556	volume_flow_area_l(1) = volume_flow_area_l(1) + dzu(k)
557	ENDDO
558	ENDDO
559	ENDIF
560
561	IF ( nyn == ny ) THEN
562	DO i = nxl, nxr
563	DO k = nzb_2d(ny,i) + 1, nzt
564	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
565	v(k,ny,i) * dzu(k)
566	volume_flow_area_l(2) = volume_flow_area_l(2) + dzu(k)
567	ENDDO
568	ENDDO
569	ENDIF
570
571	#if defined( __parallel )
572	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
573	2, MPI_REAL, MPI_SUM, comm2d, ierr )
574	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
575	2, MPI_REAL, MPI_SUM, comm2d, ierr )
576	#else
577	volume_flow_initial = volume_flow_initial_l
578	volume_flow_area = volume_flow_area_l
579	#endif
580	ENDIF
581
582	!
583	!-- For the moment, perturbation pressure and vertical velocity are zero
584	p = 0.0; w = 0.0
585
586	!
587	!-- Initialize array sums (must be defined in first call of pres)
588	sums = 0.0
589
590	!
591	!-- Treating cloud physics, liquid water content is zero at beginning of
592	!-- the simulation
593	IF ( cloud_physics ) ql = 0.0
594
595	!
596	!-- Initialize spectra
597	IF ( dt_dosp /= 9999999.9 ) THEN
598	spectrum_x = 0.0
599	spectrum_y = 0.0
600	ENDIF
601
602	!
603	!-- Impose vortex with vertical axis on the initial velocity profile
604	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
605	CALL init_rankine
606	ENDIF
607
608	!
609	!-- Impose temperature anomaly (advection test only)
610	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
611	CALL init_pt_anomaly
612	ENDIF
613
614	!
615	!-- If required, change the surface temperature at the start of the 3D run
616	IF ( pt_surface_initial_change /= 0.0 ) THEN
617	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
618	ENDIF
619
620	!
621	!-- If required, change the surface humidity/scalar at the start of the 3D
622	!-- run
623	IF ( ( moisture .OR. passive_scalar ) .AND. &
624	q_surface_initial_change /= 0.0 ) THEN
625	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
626	ENDIF
627
628	!
629	!-- Initialize the random number generator (from numerical recipes)
630	CALL random_function_ini
631
632	!
633	!-- Impose random perturbation on the horizontal velocity field and then
634	!-- remove the divergences from the velocity field
635	IF ( create_disturbances ) THEN
636	CALL disturb_field( nzb_u_inner, tend, u, uxrp, 0 )
637	CALL disturb_field( nzb_v_inner, tend, v, 0, vynp )
638	n_sor = nsor_ini
639	CALL pres
640	n_sor = nsor
641	ENDIF
642
643	!
644	!-- Once again set the perturbation pressure explicitly to zero in order to
645	!-- assure that it does not generate any divergences in the first time step.
646	!-- At t=0 the velocity field is free of divergence (as constructed above).
647	!-- Divergences being created during a time step are not yet known and thus
648	!-- cannot be corrected during the time step yet.
649	p = 0.0
650
651	!
652	!-- Initialize old and new time levels.
653	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
654	e_m = e; pt_m = pt; u_m = u; v_m = v; w_m = w; kh_m = kh; km_m = km
655	ELSE
656	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
657	ENDIF
658	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
659
660	IF ( moisture .OR. passive_scalar ) THEN
661	IF ( ASSOCIATED( q_m ) ) q_m = q
662	IF ( timestep_scheme(1:5) == 'runge' ) tq_m = 0.0
663	q_p = q
664	IF ( moisture .AND. ASSOCIATED( vpt_m ) ) vpt_m = vpt
665	ENDIF
666
667	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' ) &
668	THEN
669	!
670	!-- Read binary data from restart file
671	CALL read_3d_binary
672
673	!
674	!-- Calculate initial temperature field and other constants used in case
675	!-- of a sloping surface
676	IF ( sloping_surface ) CALL init_slope
677
678	!
679	!-- Initialize new time levels (only done in order to set boundary values
680	!-- including ghost points)
681	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
682	IF ( moisture .OR. passive_scalar ) q_p = q
683
684	ELSE
685	!
686	!-- Actually this part of the programm should not be reached
687	IF ( myid == 0 ) PRINT*,'+++ init_3d_model: unknown initializing ', &
688	'problem'
689	CALL local_stop
690	ENDIF
691
692	!
693	!-- If required, initialize dvrp-software
694	! WRITE ( 9, * ) '*** myid=', myid, ' vor init_dvrp'
695	! CALL FLUSH_( 9 )
696	IF ( dt_dvrp /= 9999999.9 ) CALL init_dvrp
697	! WRITE ( 9, * ) '*** myid=', myid, ' nach init_dvrp'
698	! CALL FLUSH_( 9 )
699
700	!
701	!-- If required, initialize quantities for handling cloud physics
702	!-- This routine must be called before init_particles, because
703	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
704	!-- init_particles) is not defined.
705	CALL init_cloud_physics
706
707	!
708	!-- If required, initialize particles
709	! WRITE ( 9, * ) '*** myid=', myid, ' vor init_particles'
710	! CALL FLUSH_( 9 )
711	CALL init_particles
712	! WRITE ( 9, * ) '*** myid=', myid, ' nach init_particles'
713	! CALL FLUSH_( 9 )
714
715	!
716	!-- Initialize quantities for special advections schemes
717	CALL init_advec
718
719	!
720	!-- Initialize Rayleigh damping factors
721	rdf = 0.0
722	IF ( rayleigh_damping_factor /= 0.0 ) THEN
723	DO k = nzb+1, nzt
724	IF ( zu(k) >= rayleigh_damping_height ) THEN
725	rdf(k) = rayleigh_damping_factor * &
726	( SIN( pi * 0.5 * ( zu(k) - rayleigh_damping_height ) &
727	/ ( zu(nzt) - rayleigh_damping_height ) )&
728	)**2
729	ENDIF
730	ENDDO
731	ENDIF
732
733	!
734	!-- Initialize diffusivities used within the outflow damping layer in case of
735	!-- non-cyclic lateral boundaries. A linear increase is assumed over the first
736	!-- half of the width of the damping layer
737	IF ( bc_lr /= 'cyclic' ) THEN
738
739	DO i = nxl-1, nxr+1
740
741	IF ( outflow_r ) THEN
742
743	IF ( i >= nx - outflow_damping_width ) THEN
744	km_damp_x(i) = km_damp_max * MIN( 1.0, &
745	( i - ( nx - outflow_damping_width ) ) / &
746	REAL( outflow_damping_width/2 ) &
747	)
748	ELSE
749	km_damp_x(i) = 0.0
750	ENDIF
751
752	ELSEIF ( outflow_l ) THEN
753
754	IF ( i <= outflow_damping_width ) THEN
755	km_damp_x(i) = km_damp_max * MIN( 1.0, &
756	( outflow_damping_width - i ) / &
757	REAL( outflow_damping_width/2 ) &
758	)
759	ELSE
760	km_damp_x(i) = 0.0
761	ENDIF
762
763	ENDIF
764
765	ENDDO
766	ENDIF
767
768	IF ( bc_ns /= 'cyclic' ) THEN
769
770	DO j = nys-1, nyn+1
771
772	IF ( outflow_n ) THEN
773
774	IF ( j >= ny - outflow_damping_width ) THEN
775	km_damp_y(j) = km_damp_max * MIN( 1.0, &
776	( j - ( ny - outflow_damping_width ) ) / &
777	REAL( outflow_damping_width/2 ) &
778	)
779	ELSE
780	km_damp_y(j) = 0.0
781	ENDIF
782
783	ELSEIF ( outflow_s ) THEN
784
785	IF ( j <= outflow_damping_width ) THEN
786	km_damp_y(j) = km_damp_max * MIN( 1.0, &
787	( outflow_damping_width - j ) / &
788	REAL( outflow_damping_width/2 ) &
789	)
790	ELSE
791	km_damp_y(j) = 0.0
792	ENDIF
793
794	ENDIF
795
796	ENDDO
797	ENDIF
798
799	!
800	!-- Initialize local summation arrays for UP flow_statistics. This is necessary
801	!-- because they may not yet have been initialized when they are called from
802	!-- flow_statistics (or - depending on the chosen model run - are never
803	!-- initialized)
804	sums_divnew_l = 0.0
805	sums_divold_l = 0.0
806	sums_l_l = 0.0
807	sums_up_fraction_l = 0.0
808	sums_wsts_bc_l = 0.0
809
810	!
811	!-- Pre-set masks for regional statistics. Default is the total model domain.
812	rmask = 1.0
813
814	!
815	!-- User-defined initializing actions
816	CALL user_init
817
818	!
819	!-- Input binary data file is not needed anymore. This line must be placed
820	!-- after call of user_init!
821	CALL close_file( 13 )
822
823	!
824	!-- Compute total sum of active mask grid points
825	!-- ngp_2dh: number of grid points of a horizontal cross section through the
826	!-- total domain
827	!-- ngp_3d: number of grid points of the total domain
828	!-- Note: The lower vertical index nzb_s_outer imposes a small error on the 2D
829	!-- ---- averages of staggered variables such as u and v due to the topography
830	!-- arrangement on the staggered grid. Maybe revise later.
831	ngp_2dh_outer_l = 0
832	ngp_2dh_outer = 0
833	ngp_2dh_l = 0
834	ngp_2dh = 0
835	ngp_3d_inner_l = 0
836	ngp_3d_inner = 0
837	ngp_3d = 0
838	ngp_sums = ( nz + 2 ) * var_sum
839
840	DO sr = 0, statistic_regions
841	DO i = nxl, nxr
842	DO j = nys, nyn
843	IF ( rmask(j,i,sr) == 1.0 ) THEN
844	!
845	!-- All xy-grid points
846	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
847	!
848	!-- xy-grid points above topography
849	DO k = nzb_s_outer(j,i), nz + 1
850	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
851	ENDDO
852	!
853	!-- All grid points of the total domain above topography
854	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
855	( nz - nzb_s_inner(j,i) + 2 )
856	ENDIF
857	ENDDO
858	ENDDO
859	ENDDO
860
861	sr = statistic_regions + 1
862	#if defined( __parallel )
863	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
864	comm2d, ierr )
865	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
866	MPI_INTEGER, MPI_SUM, comm2d, ierr )
867	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner(0), sr, MPI_INTEGER, &
868	MPI_SUM, comm2d, ierr )
869	#else
870	ngp_2dh = ngp_2dh_l
871	ngp_2dh_outer = ngp_2dh_outer_l
872	ngp_3d_inner = ngp_3d_inner_l
873	#endif
874
875	ngp_3d = ngp_2dh * ( nz + 2 )
876
877	!
878	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
879	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
880	!-- the respective subdomain lie below the surface topography
881	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
882	ngp_3d_inner = MAX( 1, ngp_3d_inner(:) )
883
884	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l )
885
886
887	END SUBROUTINE init_3d_model

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