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source: palm/trunk/SOURCE/init_3d_model.f90 @ 59

Last change on this file since 59 was 51, checked in by raasch, 18 years ago
preliminary version, several changes to be explained later
Property svn:keywords set to `Id`
File size: 31.8 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, +module netcdf_control,
11	! initial velocities at nzb+1 are regarded for volume
12	! flow control in case they have been set zero before (to avoid small timesteps)
13	!
14	! Former revisions:
15	! -----------------
16	! $Id: init_3d_model.f90 51 2007-03-07 08:38:00Z raasch $
17	!
18	! 19 2007-02-23 04:53:48Z raasch
19	! +handling of top fluxes
20	!
21	! RCS Log replace by Id keyword, revision history cleaned up
22	!
23	! Revision 1.49 2006/08/22 15:59:07 raasch
24	! No optimization of this file on the ibmy (Yonsei Univ.)
25	!
26	! Revision 1.1 1998/03/09 16:22:22 raasch
27	! Initial revision
28	!
29	!
30	! Description:
31	! ------------
32	! Allocation of arrays and initialization of the 3D model via
33	! a) pre-run the 1D model
34	! or
35	! b) pre-set constant linear profiles
36	! or
37	! c) read values of a previous run
38	!------------------------------------------------------------------------------!
39
40	USE arrays_3d
41	USE averaging
42	USE constants
43	USE control_parameters
44	USE cpulog
45	USE indices
46	USE interfaces
47	USE model_1d
48	USE netcdf_control
49	USE particle_attributes
50	USE pegrid
51	USE profil_parameter
52	USE random_function_mod
53	USE statistics
54
55	IMPLICIT NONE
56
57	INTEGER :: i, j, k, sr
58
59	INTEGER, DIMENSION(:), ALLOCATABLE :: ngp_2dh_l, ngp_3d_inner_l
60
61	INTEGER, DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l
62
63	REAL, DIMENSION(1:2) :: volume_flow_area_l, volume_flow_initial_l
64
65
66	!
67	!-- Allocate arrays
68	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
69	ngp_3d(0:statistic_regions), &
70	ngp_3d_inner(0:statistic_regions), &
71	ngp_3d_inner_l(0:statistic_regions), &
72	sums_divnew_l(0:statistic_regions), &
73	sums_divold_l(0:statistic_regions) )
74	ALLOCATE( rdf(nzb+1:nzt), uvmean_outflow(nzb:nzt+1), &
75	uvmean_outflow_l(nzb:nzt+1) )
76	ALLOCATE( hom_sum(nzb:nzt+1,var_hom,0:statistic_regions), &
77	ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
78	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
79	rmask(nys-1:nyn+1,nxl-1:nxr+1,0:statistic_regions), &
80	sums(nzb:nzt+1,var_sum), &
81	sums_l(nzb:nzt+1,var_sum,0:threads_per_task-1), &
82	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
83	sums_up_fraction_l(10,3,0:statistic_regions), &
84	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions), &
85	ts_value(var_ts,0:statistic_regions) )
86	ALLOCATE( km_damp_x(nxl-1:nxr+1), km_damp_y(nys-1:nyn+1) )
87
88	ALLOCATE( rif_1(nys-1:nyn+1,nxl-1:nxr+1), shf_1(nys-1:nyn+1,nxl-1:nxr+1), &
89	ts(nys-1:nyn+1,nxl-1:nxr+1), tswst_1(nys-1:nyn+1,nxl-1:nxr+1), &
90	us(nys-1:nyn+1,nxl-1:nxr+1), usws_1(nys-1:nyn+1,nxl-1:nxr+1), &
91	vsws_1(nys-1:nyn+1,nxl-1:nxr+1), z0(nys-1:nyn+1,nxl-1:nxr+1) )
92
93	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
94	!
95	!-- Leapfrog scheme needs two timelevels of diffusion quantities
96	ALLOCATE( rif_2(nys-1:nyn+1,nxl-1:nxr+1), &
97	shf_2(nys-1:nyn+1,nxl-1:nxr+1), &
98	tswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
99	usws_2(nys-1:nyn+1,nxl-1:nxr+1), &
100	vsws_2(nys-1:nyn+1,nxl-1:nxr+1) )
101	ENDIF
102
103	ALLOCATE( d(nzb+1:nzta,nys:nyna,nxl:nxra), &
104	e_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
105	e_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
106	e_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
107	kh_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
108	km_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
109	p(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
110	pt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
111	pt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
112	pt_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
113	tend(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
114	u_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
115	u_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
116	u_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1+uxrp), &
117	v_1(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
118	v_2(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
119	v_3(nzb:nzt+1,nys-1:nyn+1+vynp,nxl-1:nxr+1), &
120	w_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
121	w_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
122	w_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
123
124	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
125	ALLOCATE( kh_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
126	km_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
127	ENDIF
128
129	IF ( moisture .OR. passive_scalar ) THEN
130	!
131	!-- 2D-moisture/scalar arrays
132	ALLOCATE ( qs(nys-1:nyn+1,nxl-1:nxr+1), &
133	qsws_1(nys-1:nyn+1,nxl-1:nxr+1), &
134	qswst_1(nys-1:nyn+1,nxl-1:nxr+1) )
135
136	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
137	ALLOCATE( qsws_2(nys-1:nyn+1,nxl-1:nxr+1), &
138	qswst_2(nys-1:nyn+1,nxl-1:nxr+1) )
139	ENDIF
140	!
141	!-- 3D-moisture/scalar arrays
142	ALLOCATE( q_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
143	q_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
144	q_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
145
146	!
147	!-- 3D-arrays needed for moisture only
148	IF ( moisture ) THEN
149	ALLOCATE( vpt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
150
151	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
152	ALLOCATE( vpt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
153	ENDIF
154
155	IF ( cloud_physics ) THEN
156	!
157	!-- Liquid water content
158	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
159	ENDIF
160
161	IF ( cloud_droplets ) THEN
162	!
163	!-- Liquid water content, change in liquid water content,
164	!-- real volume of particles (with weighting), volume of particles
165	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
166	ql_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
167	ql_v(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
168	ql_vp(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
169	ENDIF
170
171	ENDIF
172
173	ENDIF
174
175	!
176	!-- 3D-array for storing the dissipation, needed for calculating the sgs
177	!-- particle velocities
178	IF ( use_sgs_for_particles ) THEN
179	ALLOCATE ( diss(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
180	ENDIF
181
182	IF ( dt_dosp /= 9999999.9 ) THEN
183	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
184	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
185	ENDIF
186
187	!
188	!-- 4D-array for storing the Rif-values at vertical walls
189	IF ( topography /= 'flat' ) THEN
190	ALLOCATE( rif_wall(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1,1:4) )
191	rif_wall = 0.0
192	ENDIF
193
194	!
195	!-- Velocities at nzb+1 needed for volume flow control
196	IF ( conserve_volume_flow ) THEN
197	ALLOCATE( u_nzb_p1_for_vfc(nys:nyn), v_nzb_p1_for_vfc(nxl:nxr) )
198	u_nzb_p1_for_vfc = 0.0
199	v_nzb_p1_for_vfc = 0.0
200	ENDIF
201
202	!
203	!-- Initial assignment of the pointers
204	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
205
206	rif_m => rif_1; rif => rif_2
207	shf_m => shf_1; shf => shf_2
208	tswst_m => tswst_1; tswst => tswst_2
209	usws_m => usws_1; usws => usws_2
210	vsws_m => vsws_1; vsws => vsws_2
211	e_m => e_1; e => e_2; e_p => e_3; te_m => e_3
212	kh_m => kh_1; kh => kh_2
213	km_m => km_1; km => km_2
214	pt_m => pt_1; pt => pt_2; pt_p => pt_3; tpt_m => pt_3
215	u_m => u_1; u => u_2; u_p => u_3; tu_m => u_3
216	v_m => v_1; v => v_2; v_p => v_3; tv_m => v_3
217	w_m => w_1; w => w_2; w_p => w_3; tw_m => w_3
218
219	IF ( moisture .OR. passive_scalar ) THEN
220	qsws_m => qsws_1; qsws => qsws_2
221	qswst_m => qswst_1; qswst => qswst_2
222	q_m => q_1; q => q_2; q_p => q_3; tq_m => q_3
223	IF ( moisture ) vpt_m => vpt_1; vpt => vpt_2
224	IF ( cloud_physics ) ql => ql_1
225	IF ( cloud_droplets ) THEN
226	ql => ql_1
227	ql_c => ql_2
228	ENDIF
229	ENDIF
230
231	ELSE
232
233	rif => rif_1
234	shf => shf_1
235	tswst => tswst_1
236	usws => usws_1
237	vsws => vsws_1
238	e => e_1; e_p => e_2; te_m => e_3; e_m => e_3
239	kh => kh_1
240	km => km_1
241	pt => pt_1; pt_p => pt_2; tpt_m => pt_3; pt_m => pt_3
242	u => u_1; u_p => u_2; tu_m => u_3; u_m => u_3
243	v => v_1; v_p => v_2; tv_m => v_3; v_m => v_3
244	w => w_1; w_p => w_2; tw_m => w_3; w_m => w_3
245
246	IF ( moisture .OR. passive_scalar ) THEN
247	qsws => qsws_1
248	qswst => qswst_1
249	q => q_1; q_p => q_2; tq_m => q_3; q_m => q_3
250	IF ( moisture ) vpt => vpt_1
251	IF ( cloud_physics ) ql => ql_1
252	IF ( cloud_droplets ) THEN
253	ql => ql_1
254	ql_c => ql_2
255	ENDIF
256	ENDIF
257
258	ENDIF
259
260	!
261	!-- Initialize model variables
262	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
263	!
264	!-- First model run of a possible job queue.
265	!-- Initial profiles of the variables must be computes.
266	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
267	!
268	!-- Use solutions of the 1D model as initial profiles,
269	!-- start 1D model
270	CALL init_1d_model
271	!
272	!-- Transfer initial profiles to the arrays of the 3D model
273	DO i = nxl-1, nxr+1
274	DO j = nys-1, nyn+1
275	e(:,j,i) = e1d
276	kh(:,j,i) = kh1d
277	km(:,j,i) = km1d
278	pt(:,j,i) = pt_init
279	ENDDO
280	ENDDO
281	DO i = nxl-1, nxr+uxrp+1
282	DO j = nys-1, nyn+1
283	u(:,j,i) = u1d
284	ENDDO
285	ENDDO
286	DO i = nxl-1, nxr+1
287	DO j = nys-1, nyn+vynp+1
288	v(:,j,i) = v1d
289	ENDDO
290	ENDDO
291
292	IF ( moisture .OR. passive_scalar ) THEN
293	DO i = nxl-1, nxr+1
294	DO j = nys-1, nyn+1
295	q(:,j,i) = q_init
296	ENDDO
297	ENDDO
298	ENDIF
299
300	IF ( .NOT. constant_diffusion ) THEN
301	DO i = nxl-1, nxr+1
302	DO j = nys-1, nyn+1
303	e(:,j,i) = e1d
304	ENDDO
305	ENDDO
306	!
307	!-- Store initial profiles for output purposes etc.
308	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
309
310	IF ( prandtl_layer ) THEN
311	rif = rif1d(nzb+1)
312	ts = 0.0 ! could actually be computed more accurately in the
313	! 1D model. Update when opportunity arises.
314	us = us1d
315	usws = usws1d
316	vsws = vsws1d
317	ELSE
318	ts = 0.0 ! must be set, because used in
319	rif = 0.0 ! flowste
320	us = 0.0
321	usws = 0.0
322	vsws = 0.0
323	ENDIF
324
325	ELSE
326	e = 0.0 ! must be set, because used in
327	rif = 0.0 ! flowste
328	ts = 0.0
329	us = 0.0
330	usws = 0.0
331	vsws = 0.0
332	ENDIF
333
334	!
335	!-- In every case qs = 0.0 (see also pt)
336	!-- This could actually be computed more accurately in the 1D model.
337	!-- Update when opportunity arises!
338	IF ( moisture .OR. passive_scalar ) qs = 0.0
339
340	!
341	!-- inside buildings set velocities back to zero
342	IF ( topography /= 'flat' ) THEN
343	DO i = nxl-1, nxr+1
344	DO j = nys-1, nyn+1
345	u(nzb:nzb_u_inner(j,i),j,i) = 0.0
346	v(nzb:nzb_v_inner(j,i),j,i) = 0.0
347	ENDDO
348	ENDDO
349	!
350	!-- WARNING: The extra boundary conditions set after running the
351	!-- ------- 1D model impose an error on the divergence one layer
352	!-- below the topography; need to correct later
353	!-- ATTENTION: Provisional correction for Piacsek & Williams
354	!-- --------- advection scheme: keep u and v zero one layer below
355	!-- the topography.
356	IF ( ibc_uv_b == 0 ) THEN
357	!
358	!-- Satisfying the Dirichlet condition with an extra layer below
359	!-- the surface where the u and v component change their sign.
360	DO i = nxl-1, nxr+1
361	DO j = nys-1, nyn+1
362	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = -u(1,j,i)
363	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = -v(1,j,i)
364	ENDDO
365	ENDDO
366
367	ELSE
368	!
369	!-- Neumann condition
370	DO i = nxl-1, nxr+1
371	DO j = nys-1, nyn+1
372	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
373	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
374	ENDDO
375	ENDDO
376
377	ENDIF
378
379	ENDIF
380
381	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
382	THEN
383	!
384	!-- Use constructed initial profiles (velocity constant with height,
385	!-- temperature profile with constant gradient)
386	DO i = nxl-1, nxr+1
387	DO j = nys-1, nyn+1
388	pt(:,j,i) = pt_init
389	ENDDO
390	ENDDO
391	DO i = nxl-1, nxr+uxrp+1
392	DO j = nys-1, nyn+1
393	u(:,j,i) = u_init
394	ENDDO
395	ENDDO
396	DO i = nxl-1, nxr+1
397	DO j = nys-1, nyn+vynp+1
398	v(:,j,i) = v_init
399	ENDDO
400	ENDDO
401	!
402	!-- Set initial horizontal velocities at the lowest computational grid levels
403	!-- to zero in order to avoid too small time steps caused by the diffusion
404	!-- limit in the initial phase of a run (at k=1, dz/2 occurs in the
405	!-- limiting formula!). The original values are stored to be later used for
406	!-- volume flow control.
407	DO i = nxl-1, nxr+1
408	DO j = nys-1, nyn+1
409	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0
410	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0
411	ENDDO
412	ENDDO
413	IF ( conserve_volume_flow ) THEN
414	IF ( nxr == nx ) THEN
415	DO j = nys, nyn
416	k = nzb_u_inner(j,nx) + 1
417	u_nzb_p1_for_vfc(j) = u_init(k) * dzu(k)
418	ENDDO
419	ENDIF
420	IF ( nyn == ny ) THEN
421	DO i = nxl, nxr
422	k = nzb_v_inner(ny,i) + 1
423	v_nzb_p1_for_vfc(i) = v_init(k) * dzu(k)
424	ENDDO
425	ENDIF
426	ENDIF
427
428	IF ( moisture .OR. passive_scalar ) THEN
429	DO i = nxl-1, nxr+1
430	DO j = nys-1, nyn+1
431	q(:,j,i) = q_init
432	ENDDO
433	ENDDO
434	ENDIF
435
436
437	IF ( constant_diffusion ) THEN
438	km = km_constant
439	kh = km / prandtl_number
440	ELSE
441	kh = 0.01 ! there must exist an initial diffusion, because
442	km = 0.01 ! otherwise no TKE would be produced by the
443	! production terms, as long as not yet
444	! e = (u/cm)*2 at k=nzb+1
445	ENDIF
446	e = 0.0
447	rif = 0.0
448	ts = 0.0
449	us = 0.0
450	usws = 0.0
451	vsws = 0.0
452	IF ( moisture .OR. passive_scalar ) qs = 0.0
453
454	!
455	!-- Compute initial temperature field and other constants used in case
456	!-- of a sloping surface
457	IF ( sloping_surface ) CALL init_slope
458
459	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
460	THEN
461	!
462	!-- Initialization will completely be done by the user
463	CALL user_init_3d_model
464
465	ENDIF
466
467	!
468	!-- Calculate virtual potential temperature
469	IF ( moisture ) vpt = pt * ( 1.0 + 0.61 * q )
470
471	!
472	!-- Store initial profiles for output purposes etc.
473	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
474	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
475	IF ( ibc_uv_b == 0 ) THEN
476	hom(nzb,1,5,:) = -hom(nzb+1,1,5,:) ! due to satisfying the Dirichlet
477	hom(nzb,1,6,:) = -hom(nzb+1,1,6,:) ! condition with an extra layer
478	! below the surface where the u and v component change their sign
479	ENDIF
480	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
481	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
482	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
483
484
485	IF ( moisture ) THEN
486	!
487	!-- Store initial profile of total water content, virtual potential
488	!-- temperature
489	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
490	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
491	IF ( cloud_physics .OR. cloud_droplets ) THEN
492	!
493	!-- Store initial profile of specific humidity and potential
494	!-- temperature
495	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
496	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
497	ENDIF
498	ENDIF
499
500	IF ( passive_scalar ) THEN
501	!
502	!-- Store initial scalar profile
503	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
504	ENDIF
505
506	!
507	!-- Initialize fluxes at bottom surface
508	IF ( use_surface_fluxes ) THEN
509
510	IF ( constant_heatflux ) THEN
511	!
512	!-- Heat flux is prescribed
513	IF ( random_heatflux ) THEN
514	CALL disturb_heatflux
515	ELSE
516	shf = surface_heatflux
517	!
518	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
519	IF ( TRIM( topography ) /= 'flat' ) THEN
520	DO i = nxl-1, nxr+1
521	DO j = nys-1, nyn+1
522	IF ( nzb_s_inner(j,i) /= 0 ) THEN
523	shf(j,i) = wall_heatflux(0)
524	ENDIF
525	ENDDO
526	ENDDO
527	ENDIF
528	ENDIF
529	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
530	ENDIF
531
532	!
533	!-- Determine the near-surface water flux
534	IF ( moisture .OR. passive_scalar ) THEN
535	IF ( constant_waterflux ) THEN
536	qsws = surface_waterflux
537	IF ( ASSOCIATED( qsws_m ) ) qsws_m = qsws
538	ENDIF
539	ENDIF
540
541	ENDIF
542
543	!
544	!-- Initialize fluxes at top surface
545	!-- Currently, only the heatflux can be prescribed. The latent flux is
546	!-- zero in this case!
547	IF ( use_top_fluxes ) THEN
548
549	IF ( constant_top_heatflux ) THEN
550	!
551	!-- Heat flux is prescribed
552	tswst = top_heatflux
553	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
554
555	IF ( moisture .OR. passive_scalar ) THEN
556	qswst = 0.0
557	IF ( ASSOCIATED( qswst_m ) ) qswst_m = qswst
558	ENDIF
559	ENDIF
560
561	ENDIF
562
563	!
564	!-- Initialize Prandtl layer quantities
565	IF ( prandtl_layer ) THEN
566
567	z0 = roughness_length
568
569	IF ( .NOT. constant_heatflux ) THEN
570	!
571	!-- Surface temperature is prescribed. Here the heat flux cannot be
572	!-- simply estimated, because therefore rif, u* and theta* would have
573	!-- to be computed by iteration. This is why the heat flux is assumed
574	!-- to be zero before the first time step. It approaches its correct
575	!-- value in the course of the first few time steps.
576	shf = 0.0
577	IF ( ASSOCIATED( shf_m ) ) shf_m = 0.0
578	ENDIF
579
580	IF ( moisture .OR. passive_scalar ) THEN
581	IF ( .NOT. constant_waterflux ) THEN
582	qsws = 0.0
583	IF ( ASSOCIATED( qsws_m ) ) qsws_m = 0.0
584	ENDIF
585	ENDIF
586
587	ENDIF
588
589	!
590	!-- Calculate the initial volume flow at the right and north boundary
591	IF ( conserve_volume_flow ) THEN
592
593	volume_flow_initial_l = 0.0
594	volume_flow_area_l = 0.0
595
596	IF ( nxr == nx ) THEN
597	DO j = nys, nyn
598	DO k = nzb_2d(j,nx) + 1, nzt
599	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
600	u(k,j,nx) * dzu(k)
601	volume_flow_area_l(1) = volume_flow_area_l(1) + dzu(k)
602	ENDDO
603	!
604	!-- Correction if velocity at nzb+1 has been set zero further above
605	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
606	u_nzb_p1_for_vfc(j)
607	ENDDO
608	ENDIF
609
610	IF ( nyn == ny ) THEN
611	DO i = nxl, nxr
612	DO k = nzb_2d(ny,i) + 1, nzt
613	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
614	v(k,ny,i) * dzu(k)
615	volume_flow_area_l(2) = volume_flow_area_l(2) + dzu(k)
616	ENDDO
617	!
618	!-- Correction if velocity at nzb+1 has been set zero further above
619	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
620	v_nzb_p1_for_vfc(i)
621	ENDDO
622	ENDIF
623
624	#if defined( __parallel )
625	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
626	2, MPI_REAL, MPI_SUM, comm2d, ierr )
627	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
628	2, MPI_REAL, MPI_SUM, comm2d, ierr )
629	#else
630	volume_flow_initial = volume_flow_initial_l
631	volume_flow_area = volume_flow_area_l
632	#endif
633	ENDIF
634
635	!
636	!-- For the moment, perturbation pressure and vertical velocity are zero
637	p = 0.0; w = 0.0
638
639	!
640	!-- Initialize array sums (must be defined in first call of pres)
641	sums = 0.0
642
643	!
644	!-- Treating cloud physics, liquid water content is zero at beginning of
645	!-- the simulation
646	IF ( cloud_physics ) ql = 0.0
647
648	!
649	!-- Initialize spectra
650	IF ( dt_dosp /= 9999999.9 ) THEN
651	spectrum_x = 0.0
652	spectrum_y = 0.0
653	ENDIF
654
655	!
656	!-- Impose vortex with vertical axis on the initial velocity profile
657	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
658	CALL init_rankine
659	ENDIF
660
661	!
662	!-- Impose temperature anomaly (advection test only)
663	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
664	CALL init_pt_anomaly
665	ENDIF
666
667	!
668	!-- If required, change the surface temperature at the start of the 3D run
669	IF ( pt_surface_initial_change /= 0.0 ) THEN
670	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
671	ENDIF
672
673	!
674	!-- If required, change the surface humidity/scalar at the start of the 3D
675	!-- run
676	IF ( ( moisture .OR. passive_scalar ) .AND. &
677	q_surface_initial_change /= 0.0 ) THEN
678	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
679	ENDIF
680
681	!
682	!-- Initialize the random number generator (from numerical recipes)
683	CALL random_function_ini
684
685	!
686	!-- Impose random perturbation on the horizontal velocity field and then
687	!-- remove the divergences from the velocity field
688	IF ( create_disturbances ) THEN
689	CALL disturb_field( nzb_u_inner, tend, u, uxrp, 0 )
690	CALL disturb_field( nzb_v_inner, tend, v, 0, vynp )
691	n_sor = nsor_ini
692	CALL pres
693	n_sor = nsor
694	ENDIF
695
696	!
697	!-- Once again set the perturbation pressure explicitly to zero in order to
698	!-- assure that it does not generate any divergences in the first time step.
699	!-- At t=0 the velocity field is free of divergence (as constructed above).
700	!-- Divergences being created during a time step are not yet known and thus
701	!-- cannot be corrected during the time step yet.
702	p = 0.0
703
704	!
705	!-- Initialize old and new time levels.
706	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
707	e_m = e; pt_m = pt; u_m = u; v_m = v; w_m = w; kh_m = kh; km_m = km
708	ELSE
709	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
710	ENDIF
711	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
712
713	IF ( moisture .OR. passive_scalar ) THEN
714	IF ( ASSOCIATED( q_m ) ) q_m = q
715	IF ( timestep_scheme(1:5) == 'runge' ) tq_m = 0.0
716	q_p = q
717	IF ( moisture .AND. ASSOCIATED( vpt_m ) ) vpt_m = vpt
718	ENDIF
719
720	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' ) &
721	THEN
722	!
723	!-- Read binary data from restart file
724	CALL read_3d_binary
725
726	!
727	!-- Calculate initial temperature field and other constants used in case
728	!-- of a sloping surface
729	IF ( sloping_surface ) CALL init_slope
730
731	!
732	!-- Initialize new time levels (only done in order to set boundary values
733	!-- including ghost points)
734	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
735	IF ( moisture .OR. passive_scalar ) q_p = q
736
737	ELSE
738	!
739	!-- Actually this part of the programm should not be reached
740	IF ( myid == 0 ) PRINT*,'+++ init_3d_model: unknown initializing ', &
741	'problem'
742	CALL local_stop
743	ENDIF
744
745	!
746	!-- If required, initialize dvrp-software
747	IF ( dt_dvrp /= 9999999.9 ) CALL init_dvrp
748
749	!
750	!-- If required, initialize quantities for handling cloud physics
751	!-- This routine must be called before init_particles, because
752	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
753	!-- init_particles) is not defined.
754	CALL init_cloud_physics
755
756	!
757	!-- If required, initialize particles
758	CALL init_particles
759
760	!
761	!-- Initialize quantities for special advections schemes
762	CALL init_advec
763
764	!
765	!-- Initialize Rayleigh damping factors
766	rdf = 0.0
767	IF ( rayleigh_damping_factor /= 0.0 ) THEN
768	DO k = nzb+1, nzt
769	IF ( zu(k) >= rayleigh_damping_height ) THEN
770	rdf(k) = rayleigh_damping_factor * &
771	( SIN( pi * 0.5 * ( zu(k) - rayleigh_damping_height ) &
772	/ ( zu(nzt) - rayleigh_damping_height ) )&
773	)**2
774	ENDIF
775	ENDDO
776	ENDIF
777
778	!
779	!-- Initialize diffusivities used within the outflow damping layer in case of
780	!-- non-cyclic lateral boundaries. A linear increase is assumed over the first
781	!-- half of the width of the damping layer
782	IF ( bc_lr /= 'cyclic' ) THEN
783
784	DO i = nxl-1, nxr+1
785
786	IF ( outflow_r ) THEN
787
788	IF ( i >= nx - outflow_damping_width ) THEN
789	km_damp_x(i) = km_damp_max * MIN( 1.0, &
790	( i - ( nx - outflow_damping_width ) ) / &
791	REAL( outflow_damping_width/2 ) &
792	)
793	ELSE
794	km_damp_x(i) = 0.0
795	ENDIF
796
797	ELSEIF ( outflow_l ) THEN
798
799	IF ( i <= outflow_damping_width ) THEN
800	km_damp_x(i) = km_damp_max * MIN( 1.0, &
801	( outflow_damping_width - i ) / &
802	REAL( outflow_damping_width/2 ) &
803	)
804	ELSE
805	km_damp_x(i) = 0.0
806	ENDIF
807
808	ENDIF
809
810	ENDDO
811	ENDIF
812
813	IF ( bc_ns /= 'cyclic' ) THEN
814
815	DO j = nys-1, nyn+1
816
817	IF ( outflow_n ) THEN
818
819	IF ( j >= ny - outflow_damping_width ) THEN
820	km_damp_y(j) = km_damp_max * MIN( 1.0, &
821	( j - ( ny - outflow_damping_width ) ) / &
822	REAL( outflow_damping_width/2 ) &
823	)
824	ELSE
825	km_damp_y(j) = 0.0
826	ENDIF
827
828	ELSEIF ( outflow_s ) THEN
829
830	IF ( j <= outflow_damping_width ) THEN
831	km_damp_y(j) = km_damp_max * MIN( 1.0, &
832	( outflow_damping_width - j ) / &
833	REAL( outflow_damping_width/2 ) &
834	)
835	ELSE
836	km_damp_y(j) = 0.0
837	ENDIF
838
839	ENDIF
840
841	ENDDO
842	ENDIF
843
844	!
845	!-- Initialize local summation arrays for UP flow_statistics. This is necessary
846	!-- because they may not yet have been initialized when they are called from
847	!-- flow_statistics (or - depending on the chosen model run - are never
848	!-- initialized)
849	sums_divnew_l = 0.0
850	sums_divold_l = 0.0
851	sums_l_l = 0.0
852	sums_up_fraction_l = 0.0
853	sums_wsts_bc_l = 0.0
854
855	!
856	!-- Pre-set masks for regional statistics. Default is the total model domain.
857	rmask = 1.0
858
859	!
860	!-- User-defined initializing actions. Check afterwards, if maximum number
861	!-- of allowed timeseries is not exceeded
862	CALL user_init
863
864	IF ( dots_num > dots_max ) THEN
865	IF ( myid == 0 ) THEN
866	PRINT*, '+++ user_init: number of time series quantities exceeds', &
867	' its maximum of dots_max = ', dots_max
868	PRINT*, ' Please increase dots_max in modules.f90.'
869	ENDIF
870	CALL local_stop
871	ENDIF
872
873	!
874	!-- Input binary data file is not needed anymore. This line must be placed
875	!-- after call of user_init!
876	CALL close_file( 13 )
877
878	!
879	!-- Compute total sum of active mask grid points
880	!-- ngp_2dh: number of grid points of a horizontal cross section through the
881	!-- total domain
882	!-- ngp_3d: number of grid points of the total domain
883	!-- Note: The lower vertical index nzb_s_outer imposes a small error on the 2D
884	!-- ---- averages of staggered variables such as u and v due to the topography
885	!-- arrangement on the staggered grid. Maybe revise later.
886	ngp_2dh_outer_l = 0
887	ngp_2dh_outer = 0
888	ngp_2dh_l = 0
889	ngp_2dh = 0
890	ngp_3d_inner_l = 0
891	ngp_3d_inner = 0
892	ngp_3d = 0
893	ngp_sums = ( nz + 2 ) * var_sum
894
895	DO sr = 0, statistic_regions
896	DO i = nxl, nxr
897	DO j = nys, nyn
898	IF ( rmask(j,i,sr) == 1.0 ) THEN
899	!
900	!-- All xy-grid points
901	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
902	!
903	!-- xy-grid points above topography
904	DO k = nzb_s_outer(j,i), nz + 1
905	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
906	ENDDO
907	!
908	!-- All grid points of the total domain above topography
909	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
910	( nz - nzb_s_inner(j,i) + 2 )
911	ENDIF
912	ENDDO
913	ENDDO
914	ENDDO
915
916	sr = statistic_regions + 1
917	#if defined( __parallel )
918	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
919	comm2d, ierr )
920	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
921	MPI_INTEGER, MPI_SUM, comm2d, ierr )
922	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner(0), sr, MPI_INTEGER, &
923	MPI_SUM, comm2d, ierr )
924	#else
925	ngp_2dh = ngp_2dh_l
926	ngp_2dh_outer = ngp_2dh_outer_l
927	ngp_3d_inner = ngp_3d_inner_l
928	#endif
929
930	ngp_3d = ngp_2dh * ( nz + 2 )
931
932	!
933	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
934	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
935	!-- the respective subdomain lie below the surface topography
936	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
937	ngp_3d_inner = MAX( 1, ngp_3d_inner(:) )
938
939	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l )
940
941
942	END SUBROUTINE init_3d_model

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