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source: palm/trunk/SOURCE/init_3d_model.f90 @ 88

Last change on this file since 88 was 87, checked in by raasch, 18 years ago
Preliminary update for user defined profiles
Property svn:keywords set to `Id`
File size: 33.5 KB

Line
1	#if defined( __ibmy_special )
2	@PROCESS NOOPTimize
3	#endif
4	SUBROUTINE init_3d_model
5
6	!------------------------------------------------------------------------------!
7	! Actual revisions:
8	! -----------------
9	! var_hom and var_sum renamed pr_palm
10	!
11	! Former revisions:
12	! -----------------
13	! $Id: init_3d_model.f90 87 2007-05-22 15:46:47Z raasch $
14	!
15	! 75 2007-03-22 09:54:05Z raasch
16	! Arrays for radiation boundary conditions are allocated (u_m_l, u_m_r, etc.),
17	! bugfix for cases with the outflow damping layer extending over more than one
18	! subdomain, moisture renamed humidity,
19	! new initializing action "by_user" calls user_init_3d_model,
20	! precipitation_amount/rate, ts_value are allocated, +module netcdf_control,
21	! initial velocities at nzb+1 are regarded for volume
22	! flow control in case they have been set zero before (to avoid small timesteps)
23	! -uvmean_outflow, uxrp, vynp eliminated
24	!
25	! 19 2007-02-23 04:53:48Z raasch
26	! +handling of top fluxes
27	!
28	! RCS Log replace by Id keyword, revision history cleaned up
29	!
30	! Revision 1.49 2006/08/22 15:59:07 raasch
31	! No optimization of this file on the ibmy (Yonsei Univ.)
32	!
33	! Revision 1.1 1998/03/09 16:22:22 raasch
34	! Initial revision
35	!
36	!
37	! Description:
38	! ------------
39	! Allocation of arrays and initialization of the 3D model via
40	! a) pre-run the 1D model
41	! or
42	! b) pre-set constant linear profiles
43	! or
44	! c) read values of a previous run
45	!------------------------------------------------------------------------------!
46
47	USE arrays_3d
48	USE averaging
49	USE cloud_parameters
50	USE constants
51	USE control_parameters
52	USE cpulog
53	USE indices
54	USE interfaces
55	USE model_1d
56	USE netcdf_control
57	USE particle_attributes
58	USE pegrid
59	USE profil_parameter
60	USE random_function_mod
61	USE statistics
62
63	IMPLICIT NONE
64
65	INTEGER :: i, j, k, sr
66
67	INTEGER, DIMENSION(:), ALLOCATABLE :: ngp_2dh_l, ngp_3d_inner_l
68
69	INTEGER, DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l
70
71	REAL, DIMENSION(1:2) :: volume_flow_area_l, volume_flow_initial_l
72
73
74	!
75	!-- Allocate arrays
76	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
77	ngp_3d(0:statistic_regions), &
78	ngp_3d_inner(0:statistic_regions), &
79	ngp_3d_inner_l(0:statistic_regions), &
80	sums_divnew_l(0:statistic_regions), &
81	sums_divold_l(0:statistic_regions) )
82	ALLOCATE( rdf(nzb+1:nzt) )
83	ALLOCATE( hom_sum(nzb:nzt+1,pr_palm+max_pr_user,0:statistic_regions), &
84	ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
85	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
86	rmask(nys-1:nyn+1,nxl-1:nxr+1,0:statistic_regions), &
87	sums(nzb:nzt+1,pr_palm+max_pr_user), &
88	sums_l(nzb:nzt+1,pr_palm+max_pr_user,0:threads_per_task-1), &
89	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
90	sums_up_fraction_l(10,3,0:statistic_regions), &
91	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions), &
92	ts_value(var_ts,0:statistic_regions) )
93	ALLOCATE( km_damp_x(nxl-1:nxr+1), km_damp_y(nys-1:nyn+1) )
94
95	ALLOCATE( rif_1(nys-1:nyn+1,nxl-1:nxr+1), shf_1(nys-1:nyn+1,nxl-1:nxr+1), &
96	ts(nys-1:nyn+1,nxl-1:nxr+1), tswst_1(nys-1:nyn+1,nxl-1:nxr+1), &
97	us(nys-1:nyn+1,nxl-1:nxr+1), usws_1(nys-1:nyn+1,nxl-1:nxr+1), &
98	vsws_1(nys-1:nyn+1,nxl-1:nxr+1), z0(nys-1:nyn+1,nxl-1:nxr+1) )
99
100	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
101	!
102	!-- Leapfrog scheme needs two timelevels of diffusion quantities
103	ALLOCATE( rif_2(nys-1:nyn+1,nxl-1:nxr+1), &
104	shf_2(nys-1:nyn+1,nxl-1:nxr+1), &
105	tswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
106	usws_2(nys-1:nyn+1,nxl-1:nxr+1), &
107	vsws_2(nys-1:nyn+1,nxl-1:nxr+1) )
108	ENDIF
109
110	ALLOCATE( d(nzb+1:nzta,nys:nyna,nxl:nxra), &
111	e_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
112	e_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
113	e_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
114	kh_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
115	km_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
116	p(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
117	pt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
118	pt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
119	pt_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
120	tend(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
121	u_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
122	u_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
123	u_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
124	v_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
125	v_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
126	v_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
127	w_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
128	w_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
129	w_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
130
131	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
132	ALLOCATE( kh_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
133	km_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
134	ENDIF
135
136	IF ( humidity .OR. passive_scalar ) THEN
137	!
138	!-- 2D-humidity/scalar arrays
139	ALLOCATE ( qs(nys-1:nyn+1,nxl-1:nxr+1), &
140	qsws_1(nys-1:nyn+1,nxl-1:nxr+1), &
141	qswst_1(nys-1:nyn+1,nxl-1:nxr+1) )
142
143	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
144	ALLOCATE( qsws_2(nys-1:nyn+1,nxl-1:nxr+1), &
145	qswst_2(nys-1:nyn+1,nxl-1:nxr+1) )
146	ENDIF
147	!
148	!-- 3D-humidity/scalar arrays
149	ALLOCATE( q_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
150	q_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
151	q_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
152
153	!
154	!-- 3D-arrays needed for humidity only
155	IF ( humidity ) THEN
156	ALLOCATE( vpt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
157
158	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
159	ALLOCATE( vpt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
160	ENDIF
161
162	IF ( cloud_physics ) THEN
163	!
164	!-- Liquid water content
165	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
166	!
167	!-- Precipitation amount and rate (only needed if output is switched)
168	ALLOCATE( precipitation_amount(nys-1:nyn+1,nxl-1:nxr+1), &
169	precipitation_rate(nys-1:nyn+1,nxl-1:nxr+1) )
170	ENDIF
171
172	IF ( cloud_droplets ) THEN
173	!
174	!-- Liquid water content, change in liquid water content,
175	!-- real volume of particles (with weighting), volume of particles
176	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
177	ql_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
178	ql_v(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
179	ql_vp(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
180	ENDIF
181
182	ENDIF
183
184	ENDIF
185
186	!
187	!-- 3D-array for storing the dissipation, needed for calculating the sgs
188	!-- particle velocities
189	IF ( use_sgs_for_particles ) THEN
190	ALLOCATE ( diss(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
191	ENDIF
192
193	IF ( dt_dosp /= 9999999.9 ) THEN
194	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
195	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
196	ENDIF
197
198	!
199	!-- 4D-array for storing the Rif-values at vertical walls
200	IF ( topography /= 'flat' ) THEN
201	ALLOCATE( rif_wall(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1,1:4) )
202	rif_wall = 0.0
203	ENDIF
204
205	!
206	!-- Velocities at nzb+1 needed for volume flow control
207	IF ( conserve_volume_flow ) THEN
208	ALLOCATE( u_nzb_p1_for_vfc(nys:nyn), v_nzb_p1_for_vfc(nxl:nxr) )
209	u_nzb_p1_for_vfc = 0.0
210	v_nzb_p1_for_vfc = 0.0
211	ENDIF
212
213	!
214	!-- Arrays to store velocity data from t-dt needed for radiation boundary
215	!-- conditions
216	IF ( outflow_l ) THEN
217	ALLOCATE( u_m_l(nzb:nzt+1,nys-1:nyn+1,-1:1), &
218	v_m_l(nzb:nzt+1,nys-1:nyn+1,-1:1), &
219	w_m_l(nzb:nzt+1,nys-1:nyn+1,-1:1) )
220	ENDIF
221	IF ( outflow_r ) THEN
222	ALLOCATE( u_m_r(nzb:nzt+1,nys-1:nyn+1,nx-1:nx+1), &
223	v_m_r(nzb:nzt+1,nys-1:nyn+1,nx-1:nx+1), &
224	w_m_r(nzb:nzt+1,nys-1:nyn+1,nx-1:nx+1) )
225	ENDIF
226	IF ( outflow_s ) THEN
227	ALLOCATE( u_m_s(nzb:nzt+1,-1:1,nxl-1:nxr+1), &
228	v_m_s(nzb:nzt+1,-1:1,nxl-1:nxr+1), &
229	w_m_s(nzb:nzt+1,-1:1,nxl-1:nxr+1) )
230	ENDIF
231	IF ( outflow_n ) THEN
232	ALLOCATE( u_m_n(nzb:nzt+1,ny-1:ny+1,nxl-1:nxr+1), &
233	v_m_n(nzb:nzt+1,ny-1:ny+1,nxl-1:nxr+1), &
234	w_m_n(nzb:nzt+1,ny-1:ny+1,nxl-1:nxr+1) )
235	ENDIF
236
237	!
238	!-- Initial assignment of the pointers
239	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
240
241	rif_m => rif_1; rif => rif_2
242	shf_m => shf_1; shf => shf_2
243	tswst_m => tswst_1; tswst => tswst_2
244	usws_m => usws_1; usws => usws_2
245	vsws_m => vsws_1; vsws => vsws_2
246	e_m => e_1; e => e_2; e_p => e_3; te_m => e_3
247	kh_m => kh_1; kh => kh_2
248	km_m => km_1; km => km_2
249	pt_m => pt_1; pt => pt_2; pt_p => pt_3; tpt_m => pt_3
250	u_m => u_1; u => u_2; u_p => u_3; tu_m => u_3
251	v_m => v_1; v => v_2; v_p => v_3; tv_m => v_3
252	w_m => w_1; w => w_2; w_p => w_3; tw_m => w_3
253
254	IF ( humidity .OR. passive_scalar ) THEN
255	qsws_m => qsws_1; qsws => qsws_2
256	qswst_m => qswst_1; qswst => qswst_2
257	q_m => q_1; q => q_2; q_p => q_3; tq_m => q_3
258	IF ( humidity ) vpt_m => vpt_1; vpt => vpt_2
259	IF ( cloud_physics ) ql => ql_1
260	IF ( cloud_droplets ) THEN
261	ql => ql_1
262	ql_c => ql_2
263	ENDIF
264	ENDIF
265
266	ELSE
267
268	rif => rif_1
269	shf => shf_1
270	tswst => tswst_1
271	usws => usws_1
272	vsws => vsws_1
273	e => e_1; e_p => e_2; te_m => e_3; e_m => e_3
274	kh => kh_1
275	km => km_1
276	pt => pt_1; pt_p => pt_2; tpt_m => pt_3; pt_m => pt_3
277	u => u_1; u_p => u_2; tu_m => u_3; u_m => u_3
278	v => v_1; v_p => v_2; tv_m => v_3; v_m => v_3
279	w => w_1; w_p => w_2; tw_m => w_3; w_m => w_3
280
281	IF ( humidity .OR. passive_scalar ) THEN
282	qsws => qsws_1
283	qswst => qswst_1
284	q => q_1; q_p => q_2; tq_m => q_3; q_m => q_3
285	IF ( humidity ) vpt => vpt_1
286	IF ( cloud_physics ) ql => ql_1
287	IF ( cloud_droplets ) THEN
288	ql => ql_1
289	ql_c => ql_2
290	ENDIF
291	ENDIF
292
293	ENDIF
294
295	!
296	!-- Initialize model variables
297	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
298	!
299	!-- First model run of a possible job queue.
300	!-- Initial profiles of the variables must be computes.
301	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
302	!
303	!-- Use solutions of the 1D model as initial profiles,
304	!-- start 1D model
305	CALL init_1d_model
306	!
307	!-- Transfer initial profiles to the arrays of the 3D model
308	DO i = nxl-1, nxr+1
309	DO j = nys-1, nyn+1
310	e(:,j,i) = e1d
311	kh(:,j,i) = kh1d
312	km(:,j,i) = km1d
313	pt(:,j,i) = pt_init
314	u(:,j,i) = u1d
315	v(:,j,i) = v1d
316	ENDDO
317	ENDDO
318
319	IF ( humidity .OR. passive_scalar ) THEN
320	DO i = nxl-1, nxr+1
321	DO j = nys-1, nyn+1
322	q(:,j,i) = q_init
323	ENDDO
324	ENDDO
325	ENDIF
326
327	IF ( .NOT. constant_diffusion ) THEN
328	DO i = nxl-1, nxr+1
329	DO j = nys-1, nyn+1
330	e(:,j,i) = e1d
331	ENDDO
332	ENDDO
333	!
334	!-- Store initial profiles for output purposes etc.
335	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
336
337	IF ( prandtl_layer ) THEN
338	rif = rif1d(nzb+1)
339	ts = 0.0 ! could actually be computed more accurately in the
340	! 1D model. Update when opportunity arises.
341	us = us1d
342	usws = usws1d
343	vsws = vsws1d
344	ELSE
345	ts = 0.0 ! must be set, because used in
346	rif = 0.0 ! flowste
347	us = 0.0
348	usws = 0.0
349	vsws = 0.0
350	ENDIF
351
352	ELSE
353	e = 0.0 ! must be set, because used in
354	rif = 0.0 ! flowste
355	ts = 0.0
356	us = 0.0
357	usws = 0.0
358	vsws = 0.0
359	ENDIF
360
361	!
362	!-- In every case qs = 0.0 (see also pt)
363	!-- This could actually be computed more accurately in the 1D model.
364	!-- Update when opportunity arises!
365	IF ( humidity .OR. passive_scalar ) qs = 0.0
366
367	!
368	!-- inside buildings set velocities back to zero
369	IF ( topography /= 'flat' ) THEN
370	DO i = nxl-1, nxr+1
371	DO j = nys-1, nyn+1
372	u(nzb:nzb_u_inner(j,i),j,i) = 0.0
373	v(nzb:nzb_v_inner(j,i),j,i) = 0.0
374	ENDDO
375	ENDDO
376	!
377	!-- WARNING: The extra boundary conditions set after running the
378	!-- ------- 1D model impose an error on the divergence one layer
379	!-- below the topography; need to correct later
380	!-- ATTENTION: Provisional correction for Piacsek & Williams
381	!-- --------- advection scheme: keep u and v zero one layer below
382	!-- the topography.
383	IF ( ibc_uv_b == 0 ) THEN
384	!
385	!-- Satisfying the Dirichlet condition with an extra layer below
386	!-- the surface where the u and v component change their sign.
387	DO i = nxl-1, nxr+1
388	DO j = nys-1, nyn+1
389	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = -u(1,j,i)
390	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = -v(1,j,i)
391	ENDDO
392	ENDDO
393
394	ELSE
395	!
396	!-- Neumann condition
397	DO i = nxl-1, nxr+1
398	DO j = nys-1, nyn+1
399	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
400	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
401	ENDDO
402	ENDDO
403
404	ENDIF
405
406	ENDIF
407
408	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
409	THEN
410	!
411	!-- Use constructed initial profiles (velocity constant with height,
412	!-- temperature profile with constant gradient)
413	DO i = nxl-1, nxr+1
414	DO j = nys-1, nyn+1
415	pt(:,j,i) = pt_init
416	u(:,j,i) = u_init
417	v(:,j,i) = v_init
418	ENDDO
419	ENDDO
420
421	!
422	!-- Set initial horizontal velocities at the lowest computational grid levels
423	!-- to zero in order to avoid too small time steps caused by the diffusion
424	!-- limit in the initial phase of a run (at k=1, dz/2 occurs in the
425	!-- limiting formula!). The original values are stored to be later used for
426	!-- volume flow control.
427	DO i = nxl-1, nxr+1
428	DO j = nys-1, nyn+1
429	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0
430	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0
431	ENDDO
432	ENDDO
433	IF ( conserve_volume_flow ) THEN
434	IF ( nxr == nx ) THEN
435	DO j = nys, nyn
436	k = nzb_u_inner(j,nx) + 1
437	u_nzb_p1_for_vfc(j) = u_init(k) * dzu(k)
438	ENDDO
439	ENDIF
440	IF ( nyn == ny ) THEN
441	DO i = nxl, nxr
442	k = nzb_v_inner(ny,i) + 1
443	v_nzb_p1_for_vfc(i) = v_init(k) * dzu(k)
444	ENDDO
445	ENDIF
446	ENDIF
447
448	IF ( humidity .OR. passive_scalar ) THEN
449	DO i = nxl-1, nxr+1
450	DO j = nys-1, nyn+1
451	q(:,j,i) = q_init
452	ENDDO
453	ENDDO
454	ENDIF
455
456
457	IF ( constant_diffusion ) THEN
458	km = km_constant
459	kh = km / prandtl_number
460	ELSE
461	kh = 0.01 ! there must exist an initial diffusion, because
462	km = 0.01 ! otherwise no TKE would be produced by the
463	! production terms, as long as not yet
464	! e = (u/cm)*2 at k=nzb+1
465	ENDIF
466	e = 0.0
467	rif = 0.0
468	ts = 0.0
469	us = 0.0
470	usws = 0.0
471	vsws = 0.0
472	IF ( humidity .OR. passive_scalar ) qs = 0.0
473
474	!
475	!-- Compute initial temperature field and other constants used in case
476	!-- of a sloping surface
477	IF ( sloping_surface ) CALL init_slope
478
479	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
480	THEN
481	!
482	!-- Initialization will completely be done by the user
483	CALL user_init_3d_model
484
485	ENDIF
486
487	!
488	!-- Calculate virtual potential temperature
489	IF ( humidity ) vpt = pt * ( 1.0 + 0.61 * q )
490
491	!
492	!-- Store initial profiles for output purposes etc.
493	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
494	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
495	IF ( ibc_uv_b == 0 ) THEN
496	hom(nzb,1,5,:) = -hom(nzb+1,1,5,:) ! due to satisfying the Dirichlet
497	hom(nzb,1,6,:) = -hom(nzb+1,1,6,:) ! condition with an extra layer
498	! below the surface where the u and v component change their sign
499	ENDIF
500	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
501	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
502	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
503
504
505	IF ( humidity ) THEN
506	!
507	!-- Store initial profile of total water content, virtual potential
508	!-- temperature
509	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
510	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
511	IF ( cloud_physics .OR. cloud_droplets ) THEN
512	!
513	!-- Store initial profile of specific humidity and potential
514	!-- temperature
515	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
516	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
517	ENDIF
518	ENDIF
519
520	IF ( passive_scalar ) THEN
521	!
522	!-- Store initial scalar profile
523	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
524	ENDIF
525
526	!
527	!-- Initialize fluxes at bottom surface
528	IF ( use_surface_fluxes ) THEN
529
530	IF ( constant_heatflux ) THEN
531	!
532	!-- Heat flux is prescribed
533	IF ( random_heatflux ) THEN
534	CALL disturb_heatflux
535	ELSE
536	shf = surface_heatflux
537	!
538	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
539	IF ( TRIM( topography ) /= 'flat' ) THEN
540	DO i = nxl-1, nxr+1
541	DO j = nys-1, nyn+1
542	IF ( nzb_s_inner(j,i) /= 0 ) THEN
543	shf(j,i) = wall_heatflux(0)
544	ENDIF
545	ENDDO
546	ENDDO
547	ENDIF
548	ENDIF
549	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
550	ENDIF
551
552	!
553	!-- Determine the near-surface water flux
554	IF ( humidity .OR. passive_scalar ) THEN
555	IF ( constant_waterflux ) THEN
556	qsws = surface_waterflux
557	IF ( ASSOCIATED( qsws_m ) ) qsws_m = qsws
558	ENDIF
559	ENDIF
560
561	ENDIF
562
563	!
564	!-- Initialize fluxes at top surface
565	!-- Currently, only the heatflux can be prescribed. The latent flux is
566	!-- zero in this case!
567	IF ( use_top_fluxes ) THEN
568
569	IF ( constant_top_heatflux ) THEN
570	!
571	!-- Heat flux is prescribed
572	tswst = top_heatflux
573	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
574
575	IF ( humidity .OR. passive_scalar ) THEN
576	qswst = 0.0
577	IF ( ASSOCIATED( qswst_m ) ) qswst_m = qswst
578	ENDIF
579	ENDIF
580
581	ENDIF
582
583	!
584	!-- Initialize Prandtl layer quantities
585	IF ( prandtl_layer ) THEN
586
587	z0 = roughness_length
588
589	IF ( .NOT. constant_heatflux ) THEN
590	!
591	!-- Surface temperature is prescribed. Here the heat flux cannot be
592	!-- simply estimated, because therefore rif, u* and theta* would have
593	!-- to be computed by iteration. This is why the heat flux is assumed
594	!-- to be zero before the first time step. It approaches its correct
595	!-- value in the course of the first few time steps.
596	shf = 0.0
597	IF ( ASSOCIATED( shf_m ) ) shf_m = 0.0
598	ENDIF
599
600	IF ( humidity .OR. passive_scalar ) THEN
601	IF ( .NOT. constant_waterflux ) THEN
602	qsws = 0.0
603	IF ( ASSOCIATED( qsws_m ) ) qsws_m = 0.0
604	ENDIF
605	ENDIF
606
607	ENDIF
608
609	!
610	!-- Calculate the initial volume flow at the right and north boundary
611	IF ( conserve_volume_flow ) THEN
612
613	volume_flow_initial_l = 0.0
614	volume_flow_area_l = 0.0
615
616	IF ( nxr == nx ) THEN
617	DO j = nys, nyn
618	DO k = nzb_2d(j,nx) + 1, nzt
619	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
620	u(k,j,nx) * dzu(k)
621	volume_flow_area_l(1) = volume_flow_area_l(1) + dzu(k)
622	ENDDO
623	!
624	!-- Correction if velocity at nzb+1 has been set zero further above
625	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
626	u_nzb_p1_for_vfc(j)
627	ENDDO
628	ENDIF
629
630	IF ( nyn == ny ) THEN
631	DO i = nxl, nxr
632	DO k = nzb_2d(ny,i) + 1, nzt
633	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
634	v(k,ny,i) * dzu(k)
635	volume_flow_area_l(2) = volume_flow_area_l(2) + dzu(k)
636	ENDDO
637	!
638	!-- Correction if velocity at nzb+1 has been set zero further above
639	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
640	v_nzb_p1_for_vfc(i)
641	ENDDO
642	ENDIF
643
644	#if defined( __parallel )
645	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
646	2, MPI_REAL, MPI_SUM, comm2d, ierr )
647	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
648	2, MPI_REAL, MPI_SUM, comm2d, ierr )
649	#else
650	volume_flow_initial = volume_flow_initial_l
651	volume_flow_area = volume_flow_area_l
652	#endif
653	ENDIF
654
655	!
656	!-- For the moment, perturbation pressure and vertical velocity are zero
657	p = 0.0; w = 0.0
658
659	!
660	!-- Initialize array sums (must be defined in first call of pres)
661	sums = 0.0
662
663	!
664	!-- Treating cloud physics, liquid water content and precipitation amount
665	!-- are zero at beginning of the simulation
666	IF ( cloud_physics ) THEN
667	ql = 0.0
668	IF ( precipitation ) precipitation_amount = 0.0
669	ENDIF
670
671	!
672	!-- Initialize spectra
673	IF ( dt_dosp /= 9999999.9 ) THEN
674	spectrum_x = 0.0
675	spectrum_y = 0.0
676	ENDIF
677
678	!
679	!-- Impose vortex with vertical axis on the initial velocity profile
680	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
681	CALL init_rankine
682	ENDIF
683
684	!
685	!-- Impose temperature anomaly (advection test only)
686	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
687	CALL init_pt_anomaly
688	ENDIF
689
690	!
691	!-- If required, change the surface temperature at the start of the 3D run
692	IF ( pt_surface_initial_change /= 0.0 ) THEN
693	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
694	ENDIF
695
696	!
697	!-- If required, change the surface humidity/scalar at the start of the 3D
698	!-- run
699	IF ( ( humidity .OR. passive_scalar ) .AND. &
700	q_surface_initial_change /= 0.0 ) THEN
701	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
702	ENDIF
703
704	!
705	!-- Initialize the random number generator (from numerical recipes)
706	CALL random_function_ini
707
708	!
709	!-- Impose random perturbation on the horizontal velocity field and then
710	!-- remove the divergences from the velocity field
711	IF ( create_disturbances ) THEN
712	CALL disturb_field( nzb_u_inner, tend, u )
713	CALL disturb_field( nzb_v_inner, tend, v )
714	n_sor = nsor_ini
715	CALL pres
716	n_sor = nsor
717	ENDIF
718
719	!
720	!-- Once again set the perturbation pressure explicitly to zero in order to
721	!-- assure that it does not generate any divergences in the first time step.
722	!-- At t=0 the velocity field is free of divergence (as constructed above).
723	!-- Divergences being created during a time step are not yet known and thus
724	!-- cannot be corrected during the time step yet.
725	p = 0.0
726
727	!
728	!-- Initialize old and new time levels.
729	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
730	e_m = e; pt_m = pt; u_m = u; v_m = v; w_m = w; kh_m = kh; km_m = km
731	ELSE
732	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
733	ENDIF
734	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
735
736	IF ( humidity .OR. passive_scalar ) THEN
737	IF ( ASSOCIATED( q_m ) ) q_m = q
738	IF ( timestep_scheme(1:5) == 'runge' ) tq_m = 0.0
739	q_p = q
740	IF ( humidity .AND. ASSOCIATED( vpt_m ) ) vpt_m = vpt
741	ENDIF
742
743	!
744	!-- Initialize old timelevels needed for radiation boundary conditions
745	IF ( outflow_l ) THEN
746	u_m_l(:,:,:) = u(:,:,-1:1)
747	v_m_l(:,:,:) = v(:,:,-1:1)
748	w_m_l(:,:,:) = w(:,:,-1:1)
749	ENDIF
750	IF ( outflow_r ) THEN
751	u_m_r(:,:,:) = u(:,:,nx-1:nx+1)
752	v_m_r(:,:,:) = v(:,:,nx-1:nx+1)
753	w_m_r(:,:,:) = w(:,:,nx-1:nx+1)
754	ENDIF
755	IF ( outflow_s ) THEN
756	u_m_s(:,:,:) = u(:,-1:1,:)
757	v_m_s(:,:,:) = v(:,-1:1,:)
758	w_m_s(:,:,:) = w(:,-1:1,:)
759	ENDIF
760	IF ( outflow_n ) THEN
761	u_m_n(:,:,:) = u(:,ny-1:ny+1,:)
762	v_m_n(:,:,:) = v(:,ny-1:ny+1,:)
763	w_m_n(:,:,:) = w(:,ny-1:ny+1,:)
764	ENDIF
765
766	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' ) &
767	THEN
768	!
769	!-- Read binary data from restart file
770	CALL read_3d_binary
771
772	!
773	!-- Calculate initial temperature field and other constants used in case
774	!-- of a sloping surface
775	IF ( sloping_surface ) CALL init_slope
776
777	!
778	!-- Initialize new time levels (only done in order to set boundary values
779	!-- including ghost points)
780	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
781	IF ( humidity .OR. passive_scalar ) q_p = q
782
783	ELSE
784	!
785	!-- Actually this part of the programm should not be reached
786	IF ( myid == 0 ) PRINT*,'+++ init_3d_model: unknown initializing ', &
787	'problem'
788	CALL local_stop
789	ENDIF
790
791	!
792	!-- If required, initialize dvrp-software
793	IF ( dt_dvrp /= 9999999.9 ) CALL init_dvrp
794
795	!
796	!-- If required, initialize quantities for handling cloud physics
797	!-- This routine must be called before init_particles, because
798	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
799	!-- init_particles) is not defined.
800	CALL init_cloud_physics
801
802	!
803	!-- If required, initialize particles
804	IF ( particle_advection ) CALL init_particles
805
806	!
807	!-- Initialize quantities for special advections schemes
808	CALL init_advec
809
810	!
811	!-- Initialize Rayleigh damping factors
812	rdf = 0.0
813	IF ( rayleigh_damping_factor /= 0.0 ) THEN
814	DO k = nzb+1, nzt
815	IF ( zu(k) >= rayleigh_damping_height ) THEN
816	rdf(k) = rayleigh_damping_factor * &
817	( SIN( pi * 0.5 * ( zu(k) - rayleigh_damping_height ) &
818	/ ( zu(nzt) - rayleigh_damping_height ) )&
819	)**2
820	ENDIF
821	ENDDO
822	ENDIF
823
824	!
825	!-- Initialize diffusivities used within the outflow damping layer in case of
826	!-- non-cyclic lateral boundaries. A linear increase is assumed over the first
827	!-- half of the width of the damping layer
828	IF ( bc_lr == 'dirichlet/radiation' ) THEN
829
830	DO i = nxl-1, nxr+1
831	IF ( i >= nx - outflow_damping_width ) THEN
832	km_damp_x(i) = km_damp_max * MIN( 1.0, &
833	( i - ( nx - outflow_damping_width ) ) / &
834	REAL( outflow_damping_width/2 ) &
835	)
836	ELSE
837	km_damp_x(i) = 0.0
838	ENDIF
839	ENDDO
840
841	ELSEIF ( bc_lr == 'radiation/dirichlet' ) THEN
842
843	DO i = nxl-1, nxr+1
844	IF ( i <= outflow_damping_width ) THEN
845	km_damp_x(i) = km_damp_max * MIN( 1.0, &
846	( outflow_damping_width - i ) / &
847	REAL( outflow_damping_width/2 ) &
848	)
849	ELSE
850	km_damp_x(i) = 0.0
851	ENDIF
852	ENDDO
853
854	ENDIF
855
856	IF ( bc_ns == 'dirichlet/radiation' ) THEN
857
858	DO j = nys-1, nyn+1
859	IF ( j >= ny - outflow_damping_width ) THEN
860	km_damp_y(j) = km_damp_max * MIN( 1.0, &
861	( j - ( ny - outflow_damping_width ) ) / &
862	REAL( outflow_damping_width/2 ) &
863	)
864	ELSE
865	km_damp_y(j) = 0.0
866	ENDIF
867	ENDDO
868
869	ELSEIF ( bc_ns == 'radiation/dirichlet' ) THEN
870
871	DO j = nys-1, nyn+1
872	IF ( j <= outflow_damping_width ) THEN
873	km_damp_y(j) = km_damp_max * MIN( 1.0, &
874	( outflow_damping_width - j ) / &
875	REAL( outflow_damping_width/2 ) &
876	)
877	ELSE
878	km_damp_y(j) = 0.0
879	ENDIF
880	ENDDO
881
882	ENDIF
883
884	!
885	!-- Initialize local summation arrays for UP flow_statistics. This is necessary
886	!-- because they may not yet have been initialized when they are called from
887	!-- flow_statistics (or - depending on the chosen model run - are never
888	!-- initialized)
889	sums_divnew_l = 0.0
890	sums_divold_l = 0.0
891	sums_l_l = 0.0
892	sums_up_fraction_l = 0.0
893	sums_wsts_bc_l = 0.0
894
895	!
896	!-- Pre-set masks for regional statistics. Default is the total model domain.
897	rmask = 1.0
898
899	!
900	!-- User-defined initializing actions. Check afterwards, if maximum number
901	!-- of allowed timeseries is not exceeded
902	CALL user_init
903
904	IF ( dots_num > dots_max ) THEN
905	IF ( myid == 0 ) THEN
906	PRINT*, '+++ user_init: number of time series quantities exceeds', &
907	' its maximum of dots_max = ', dots_max
908	PRINT*, ' Please increase dots_max in modules.f90.'
909	ENDIF
910	CALL local_stop
911	ENDIF
912
913	!
914	!-- Input binary data file is not needed anymore. This line must be placed
915	!-- after call of user_init!
916	CALL close_file( 13 )
917
918	!
919	!-- Compute total sum of active mask grid points
920	!-- ngp_2dh: number of grid points of a horizontal cross section through the
921	!-- total domain
922	!-- ngp_3d: number of grid points of the total domain
923	!-- Note: The lower vertical index nzb_s_outer imposes a small error on the 2D
924	!-- ---- averages of staggered variables such as u and v due to the topography
925	!-- arrangement on the staggered grid. Maybe revise later.
926	ngp_2dh_outer_l = 0
927	ngp_2dh_outer = 0
928	ngp_2dh_l = 0
929	ngp_2dh = 0
930	ngp_3d_inner_l = 0
931	ngp_3d_inner = 0
932	ngp_3d = 0
933	ngp_sums = ( nz + 2 ) * ( pr_palm + max_pr_user )
934
935	DO sr = 0, statistic_regions
936	DO i = nxl, nxr
937	DO j = nys, nyn
938	IF ( rmask(j,i,sr) == 1.0 ) THEN
939	!
940	!-- All xy-grid points
941	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
942	!
943	!-- xy-grid points above topography
944	DO k = nzb_s_outer(j,i), nz + 1
945	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
946	ENDDO
947	!
948	!-- All grid points of the total domain above topography
949	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
950	( nz - nzb_s_inner(j,i) + 2 )
951	ENDIF
952	ENDDO
953	ENDDO
954	ENDDO
955
956	sr = statistic_regions + 1
957	#if defined( __parallel )
958	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
959	comm2d, ierr )
960	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
961	MPI_INTEGER, MPI_SUM, comm2d, ierr )
962	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner(0), sr, MPI_INTEGER, &
963	MPI_SUM, comm2d, ierr )
964	#else
965	ngp_2dh = ngp_2dh_l
966	ngp_2dh_outer = ngp_2dh_outer_l
967	ngp_3d_inner = ngp_3d_inner_l
968	#endif
969
970	ngp_3d = ngp_2dh * ( nz + 2 )
971
972	!
973	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
974	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
975	!-- the respective subdomain lie below the surface topography
976	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
977	ngp_3d_inner = MAX( 1, ngp_3d_inner(:) )
978
979	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l )
980
981
982	END SUBROUTINE init_3d_model

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