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source: palm/trunk/SOURCE/init_3d_model.f90 @ 40

Last change on this file since 40 was 40, checked in by raasch, 18 years ago
documentation update for the new svn-based version and for 3.1c, update of .mrun.config.default, -u in mbuild only compiles scripts
Property svn:keywords set to `Id`
File size: 29.8 KB

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

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