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source: palm/trunk/SOURCE/init_3d_model.f90 @ 104

Last change on this file since 104 was 102, checked in by raasch, 17 years ago
preliminary version for coupled runs
Property svn:keywords set to `Id`
File size: 35.8 KB

Line
1	#if defined( __ibmy_special )
2	@PROCESS NOOPTimize
3	#endif
4	SUBROUTINE init_3d_model
5
6	!------------------------------------------------------------------------------!
7	! Actual revisions:
8	! -----------------
9	! Flux initialization in case of coupled runs, +momentum fluxes at top boundary
10	!
11	! Former revisions:
12	! -----------------
13	! $Id: init_3d_model.f90 102 2007-07-27 09:09:17Z raasch $
14	!
15	! 97 2007-06-21 08:23:15Z raasch
16	! Initialization of salinity, call of init_ocean
17	!
18	! 87 2007-05-22 15:46:47Z raasch
19	! var_hom and var_sum renamed pr_palm
20	!
21	! 75 2007-03-22 09:54:05Z raasch
22	! Arrays for radiation boundary conditions are allocated (u_m_l, u_m_r, etc.),
23	! bugfix for cases with the outflow damping layer extending over more than one
24	! subdomain, moisture renamed humidity,
25	! new initializing action "by_user" calls user_init_3d_model,
26	! precipitation_amount/rate, ts_value are allocated, +module netcdf_control,
27	! initial velocities at nzb+1 are regarded for volume
28	! flow control in case they have been set zero before (to avoid small timesteps)
29	! -uvmean_outflow, uxrp, vynp eliminated
30	!
31	! 19 2007-02-23 04:53:48Z raasch
32	! +handling of top fluxes
33	!
34	! RCS Log replace by Id keyword, revision history cleaned up
35	!
36	! Revision 1.49 2006/08/22 15:59:07 raasch
37	! No optimization of this file on the ibmy (Yonsei Univ.)
38	!
39	! Revision 1.1 1998/03/09 16:22:22 raasch
40	! Initial revision
41	!
42	!
43	! Description:
44	! ------------
45	! Allocation of arrays and initialization of the 3D model via
46	! a) pre-run the 1D model
47	! or
48	! b) pre-set constant linear profiles
49	! or
50	! c) read values of a previous run
51	!------------------------------------------------------------------------------!
52
53	USE arrays_3d
54	USE averaging
55	USE cloud_parameters
56	USE constants
57	USE control_parameters
58	USE cpulog
59	USE indices
60	USE interfaces
61	USE model_1d
62	USE netcdf_control
63	USE particle_attributes
64	USE pegrid
65	USE profil_parameter
66	USE random_function_mod
67	USE statistics
68
69	IMPLICIT NONE
70
71	INTEGER :: i, j, k, sr
72
73	INTEGER, DIMENSION(:), ALLOCATABLE :: ngp_2dh_l, ngp_3d_inner_l
74
75	INTEGER, DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l
76
77	REAL, DIMENSION(1:2) :: volume_flow_area_l, volume_flow_initial_l
78
79
80	!
81	!-- Allocate arrays
82	ALLOCATE( ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
83	ngp_3d(0:statistic_regions), &
84	ngp_3d_inner(0:statistic_regions), &
85	ngp_3d_inner_l(0:statistic_regions), &
86	sums_divnew_l(0:statistic_regions), &
87	sums_divold_l(0:statistic_regions) )
88	ALLOCATE( rdf(nzb+1:nzt) )
89	ALLOCATE( hom_sum(nzb:nzt+1,pr_palm+max_pr_user,0:statistic_regions), &
90	ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
91	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
92	rmask(nys-1:nyn+1,nxl-1:nxr+1,0:statistic_regions), &
93	sums(nzb:nzt+1,pr_palm+max_pr_user), &
94	sums_l(nzb:nzt+1,pr_palm+max_pr_user,0:threads_per_task-1), &
95	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
96	sums_up_fraction_l(10,3,0:statistic_regions), &
97	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions), &
98	ts_value(var_ts,0:statistic_regions) )
99	ALLOCATE( km_damp_x(nxl-1:nxr+1), km_damp_y(nys-1:nyn+1) )
100
101	ALLOCATE( rif_1(nys-1:nyn+1,nxl-1:nxr+1), shf_1(nys-1:nyn+1,nxl-1:nxr+1), &
102	ts(nys-1:nyn+1,nxl-1:nxr+1), tswst_1(nys-1:nyn+1,nxl-1:nxr+1), &
103	us(nys-1:nyn+1,nxl-1:nxr+1), usws_1(nys-1:nyn+1,nxl-1:nxr+1), &
104	uswst_1(nys-1:nyn+1,nxl-1:nxr+1), &
105	vsws_1(nys-1:nyn+1,nxl-1:nxr+1), &
106	vswst_1(nys-1:nyn+1,nxl-1:nxr+1), z0(nys-1:nyn+1,nxl-1:nxr+1) )
107
108	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
109	!
110	!-- Leapfrog scheme needs two timelevels of diffusion quantities
111	ALLOCATE( rif_2(nys-1:nyn+1,nxl-1:nxr+1), &
112	shf_2(nys-1:nyn+1,nxl-1:nxr+1), &
113	tswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
114	usws_2(nys-1:nyn+1,nxl-1:nxr+1), &
115	uswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
116	vswst_2(nys-1:nyn+1,nxl-1:nxr+1), &
117	vsws_2(nys-1:nyn+1,nxl-1:nxr+1) )
118	ENDIF
119
120	ALLOCATE( d(nzb+1:nzta,nys:nyna,nxl:nxra), &
121	e_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
122	e_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
123	e_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
124	kh_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
125	km_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
126	p(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
127	pt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
128	pt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
129	pt_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
130	tend(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
131	u_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
132	u_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
133	u_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
134	v_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
135	v_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
136	v_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
137	w_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
138	w_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
139	w_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
140
141	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
142	ALLOCATE( kh_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
143	km_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
144	ENDIF
145
146	IF ( humidity .OR. passive_scalar ) THEN
147	!
148	!-- 2D-humidity/scalar arrays
149	ALLOCATE ( qs(nys-1:nyn+1,nxl-1:nxr+1), &
150	qsws_1(nys-1:nyn+1,nxl-1:nxr+1), &
151	qswst_1(nys-1:nyn+1,nxl-1:nxr+1) )
152
153	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
154	ALLOCATE( qsws_2(nys-1:nyn+1,nxl-1:nxr+1), &
155	qswst_2(nys-1:nyn+1,nxl-1:nxr+1) )
156	ENDIF
157	!
158	!-- 3D-humidity/scalar arrays
159	ALLOCATE( q_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
160	q_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
161	q_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
162
163	!
164	!-- 3D-arrays needed for humidity only
165	IF ( humidity ) THEN
166	ALLOCATE( vpt_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
167
168	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
169	ALLOCATE( vpt_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
170	ENDIF
171
172	IF ( cloud_physics ) THEN
173	!
174	!-- Liquid water content
175	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
176	!
177	!-- Precipitation amount and rate (only needed if output is switched)
178	ALLOCATE( precipitation_amount(nys-1:nyn+1,nxl-1:nxr+1), &
179	precipitation_rate(nys-1:nyn+1,nxl-1:nxr+1) )
180	ENDIF
181
182	IF ( cloud_droplets ) THEN
183	!
184	!-- Liquid water content, change in liquid water content,
185	!-- real volume of particles (with weighting), volume of particles
186	ALLOCATE ( ql_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
187	ql_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
188	ql_v(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
189	ql_vp(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
190	ENDIF
191
192	ENDIF
193
194	ENDIF
195
196	IF ( ocean ) THEN
197	ALLOCATE( saswsb_1(nys-1:nyn+1,nxl-1:nxr+1), &
198	saswst_1(nys-1:nyn+1,nxl-1:nxr+1) )
199	ALLOCATE( rho_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
200	sa_1(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
201	sa_2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1), &
202	sa_3(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
203	rho => rho_1 ! routine calc_mean_profile requires density to be a
204	! pointer
205	ENDIF
206
207	!
208	!-- 3D-array for storing the dissipation, needed for calculating the sgs
209	!-- particle velocities
210	IF ( use_sgs_for_particles ) THEN
211	ALLOCATE ( diss(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
212	ENDIF
213
214	IF ( dt_dosp /= 9999999.9 ) THEN
215	ALLOCATE( spectrum_x( 1:nx/2, 1:10, 1:10 ), &
216	spectrum_y( 1:ny/2, 1:10, 1:10 ) )
217	ENDIF
218
219	!
220	!-- 4D-array for storing the Rif-values at vertical walls
221	IF ( topography /= 'flat' ) THEN
222	ALLOCATE( rif_wall(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1,1:4) )
223	rif_wall = 0.0
224	ENDIF
225
226	!
227	!-- Velocities at nzb+1 needed for volume flow control
228	IF ( conserve_volume_flow ) THEN
229	ALLOCATE( u_nzb_p1_for_vfc(nys:nyn), v_nzb_p1_for_vfc(nxl:nxr) )
230	u_nzb_p1_for_vfc = 0.0
231	v_nzb_p1_for_vfc = 0.0
232	ENDIF
233
234	!
235	!-- Arrays to store velocity data from t-dt needed for radiation boundary
236	!-- conditions
237	IF ( outflow_l ) THEN
238	ALLOCATE( u_m_l(nzb:nzt+1,nys-1:nyn+1,-1:1), &
239	v_m_l(nzb:nzt+1,nys-1:nyn+1,-1:1), &
240	w_m_l(nzb:nzt+1,nys-1:nyn+1,-1:1) )
241	ENDIF
242	IF ( outflow_r ) THEN
243	ALLOCATE( u_m_r(nzb:nzt+1,nys-1:nyn+1,nx-1:nx+1), &
244	v_m_r(nzb:nzt+1,nys-1:nyn+1,nx-1:nx+1), &
245	w_m_r(nzb:nzt+1,nys-1:nyn+1,nx-1:nx+1) )
246	ENDIF
247	IF ( outflow_s ) THEN
248	ALLOCATE( u_m_s(nzb:nzt+1,-1:1,nxl-1:nxr+1), &
249	v_m_s(nzb:nzt+1,-1:1,nxl-1:nxr+1), &
250	w_m_s(nzb:nzt+1,-1:1,nxl-1:nxr+1) )
251	ENDIF
252	IF ( outflow_n ) THEN
253	ALLOCATE( u_m_n(nzb:nzt+1,ny-1:ny+1,nxl-1:nxr+1), &
254	v_m_n(nzb:nzt+1,ny-1:ny+1,nxl-1:nxr+1), &
255	w_m_n(nzb:nzt+1,ny-1:ny+1,nxl-1:nxr+1) )
256	ENDIF
257
258	!
259	!-- Initial assignment of the pointers
260	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
261
262	rif_m => rif_1; rif => rif_2
263	shf_m => shf_1; shf => shf_2
264	tswst_m => tswst_1; tswst => tswst_2
265	usws_m => usws_1; usws => usws_2
266	uswst_m => uswst_1; uswst => uswst_2
267	vsws_m => vsws_1; vsws => vsws_2
268	vswst_m => vswst_1; vswst => vswst_2
269	e_m => e_1; e => e_2; e_p => e_3; te_m => e_3
270	kh_m => kh_1; kh => kh_2
271	km_m => km_1; km => km_2
272	pt_m => pt_1; pt => pt_2; pt_p => pt_3; tpt_m => pt_3
273	u_m => u_1; u => u_2; u_p => u_3; tu_m => u_3
274	v_m => v_1; v => v_2; v_p => v_3; tv_m => v_3
275	w_m => w_1; w => w_2; w_p => w_3; tw_m => w_3
276
277	IF ( humidity .OR. passive_scalar ) THEN
278	qsws_m => qsws_1; qsws => qsws_2
279	qswst_m => qswst_1; qswst => qswst_2
280	q_m => q_1; q => q_2; q_p => q_3; tq_m => q_3
281	IF ( humidity ) vpt_m => vpt_1; vpt => vpt_2
282	IF ( cloud_physics ) ql => ql_1
283	IF ( cloud_droplets ) THEN
284	ql => ql_1
285	ql_c => ql_2
286	ENDIF
287	ENDIF
288
289	ELSE
290
291	rif => rif_1
292	shf => shf_1
293	tswst => tswst_1
294	usws => usws_1
295	uswst => uswst_1
296	vsws => vsws_1
297	vswst => vswst_1
298	e => e_1; e_p => e_2; te_m => e_3; e_m => e_3
299	kh => kh_1
300	km => km_1
301	pt => pt_1; pt_p => pt_2; tpt_m => pt_3; pt_m => pt_3
302	u => u_1; u_p => u_2; tu_m => u_3; u_m => u_3
303	v => v_1; v_p => v_2; tv_m => v_3; v_m => v_3
304	w => w_1; w_p => w_2; tw_m => w_3; w_m => w_3
305
306	IF ( humidity .OR. passive_scalar ) THEN
307	qsws => qsws_1
308	qswst => qswst_1
309	q => q_1; q_p => q_2; tq_m => q_3; q_m => q_3
310	IF ( humidity ) vpt => vpt_1
311	IF ( cloud_physics ) ql => ql_1
312	IF ( cloud_droplets ) THEN
313	ql => ql_1
314	ql_c => ql_2
315	ENDIF
316	ENDIF
317
318	IF ( ocean ) THEN
319	saswsb => saswsb_1
320	saswst => saswst_1
321	sa => sa_1; sa_p => sa_2; tsa_m => sa_3
322	ENDIF
323
324	ENDIF
325
326	!
327	!-- Initialize model variables
328	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
329	!
330	!-- First model run of a possible job queue.
331	!-- Initial profiles of the variables must be computes.
332	IF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
333	!
334	!-- Use solutions of the 1D model as initial profiles,
335	!-- start 1D model
336	CALL init_1d_model
337	!
338	!-- Transfer initial profiles to the arrays of the 3D model
339	DO i = nxl-1, nxr+1
340	DO j = nys-1, nyn+1
341	e(:,j,i) = e1d
342	kh(:,j,i) = kh1d
343	km(:,j,i) = km1d
344	pt(:,j,i) = pt_init
345	u(:,j,i) = u1d
346	v(:,j,i) = v1d
347	ENDDO
348	ENDDO
349
350	IF ( humidity .OR. passive_scalar ) THEN
351	DO i = nxl-1, nxr+1
352	DO j = nys-1, nyn+1
353	q(:,j,i) = q_init
354	ENDDO
355	ENDDO
356	ENDIF
357
358	IF ( .NOT. constant_diffusion ) THEN
359	DO i = nxl-1, nxr+1
360	DO j = nys-1, nyn+1
361	e(:,j,i) = e1d
362	ENDDO
363	ENDDO
364	!
365	!-- Store initial profiles for output purposes etc.
366	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
367
368	IF ( prandtl_layer ) THEN
369	rif = rif1d(nzb+1)
370	ts = 0.0 ! could actually be computed more accurately in the
371	! 1D model. Update when opportunity arises.
372	us = us1d
373	usws = usws1d
374	vsws = vsws1d
375	ELSE
376	ts = 0.0 ! must be set, because used in
377	rif = 0.0 ! flowste
378	us = 0.0
379	usws = 0.0
380	vsws = 0.0
381	ENDIF
382
383	ELSE
384	e = 0.0 ! must be set, because used in
385	rif = 0.0 ! flowste
386	ts = 0.0
387	us = 0.0
388	usws = 0.0
389	vsws = 0.0
390	ENDIF
391	uswst = top_momentumflux_u
392	vswst = top_momentumflux_v
393
394	!
395	!-- In every case qs = 0.0 (see also pt)
396	!-- This could actually be computed more accurately in the 1D model.
397	!-- Update when opportunity arises!
398	IF ( humidity .OR. passive_scalar ) qs = 0.0
399
400	!
401	!-- inside buildings set velocities back to zero
402	IF ( topography /= 'flat' ) THEN
403	DO i = nxl-1, nxr+1
404	DO j = nys-1, nyn+1
405	u(nzb:nzb_u_inner(j,i),j,i) = 0.0
406	v(nzb:nzb_v_inner(j,i),j,i) = 0.0
407	ENDDO
408	ENDDO
409	!
410	!-- WARNING: The extra boundary conditions set after running the
411	!-- ------- 1D model impose an error on the divergence one layer
412	!-- below the topography; need to correct later
413	!-- ATTENTION: Provisional correction for Piacsek & Williams
414	!-- --------- advection scheme: keep u and v zero one layer below
415	!-- the topography.
416	IF ( ibc_uv_b == 0 ) THEN
417	!
418	!-- Satisfying the Dirichlet condition with an extra layer below
419	!-- the surface where the u and v component change their sign.
420	DO i = nxl-1, nxr+1
421	DO j = nys-1, nyn+1
422	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = -u(1,j,i)
423	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = -v(1,j,i)
424	ENDDO
425	ENDDO
426
427	ELSE
428	!
429	!-- Neumann condition
430	DO i = nxl-1, nxr+1
431	DO j = nys-1, nyn+1
432	IF ( nzb_u_inner(j,i) == 0 ) u(0,j,i) = u(1,j,i)
433	IF ( nzb_v_inner(j,i) == 0 ) v(0,j,i) = v(1,j,i)
434	ENDDO
435	ENDDO
436
437	ENDIF
438
439	ENDIF
440
441	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
442	THEN
443	!
444	!-- Use constructed initial profiles (velocity constant with height,
445	!-- temperature profile with constant gradient)
446	DO i = nxl-1, nxr+1
447	DO j = nys-1, nyn+1
448	pt(:,j,i) = pt_init
449	u(:,j,i) = u_init
450	v(:,j,i) = v_init
451	ENDDO
452	ENDDO
453
454	!
455	!-- Set initial horizontal velocities at the lowest computational grid levels
456	!-- to zero in order to avoid too small time steps caused by the diffusion
457	!-- limit in the initial phase of a run (at k=1, dz/2 occurs in the
458	!-- limiting formula!). The original values are stored to be later used for
459	!-- volume flow control.
460	DO i = nxl-1, nxr+1
461	DO j = nys-1, nyn+1
462	u(nzb:nzb_u_inner(j,i)+1,j,i) = 0.0
463	v(nzb:nzb_v_inner(j,i)+1,j,i) = 0.0
464	ENDDO
465	ENDDO
466	IF ( conserve_volume_flow ) THEN
467	IF ( nxr == nx ) THEN
468	DO j = nys, nyn
469	k = nzb_u_inner(j,nx) + 1
470	u_nzb_p1_for_vfc(j) = u_init(k) * dzu(k)
471	ENDDO
472	ENDIF
473	IF ( nyn == ny ) THEN
474	DO i = nxl, nxr
475	k = nzb_v_inner(ny,i) + 1
476	v_nzb_p1_for_vfc(i) = v_init(k) * dzu(k)
477	ENDDO
478	ENDIF
479	ENDIF
480
481	IF ( humidity .OR. passive_scalar ) THEN
482	DO i = nxl-1, nxr+1
483	DO j = nys-1, nyn+1
484	q(:,j,i) = q_init
485	ENDDO
486	ENDDO
487	ENDIF
488
489	IF ( ocean ) THEN
490	DO i = nxl-1, nxr+1
491	DO j = nys-1, nyn+1
492	sa(:,j,i) = sa_init
493	ENDDO
494	ENDDO
495	ENDIF
496
497	IF ( constant_diffusion ) THEN
498	km = km_constant
499	kh = km / prandtl_number
500	ELSE
501	kh = 0.01 ! there must exist an initial diffusion, because
502	km = 0.01 ! otherwise no TKE would be produced by the
503	! production terms, as long as not yet
504	! e = (u/cm)*2 at k=nzb+1
505	ENDIF
506	e = 0.0
507	rif = 0.0
508	ts = 0.0
509	us = 0.0
510	usws = 0.0
511	uswst = top_momentumflux_u
512	vsws = 0.0
513	vswst = top_momentumflux_v
514	IF ( humidity .OR. passive_scalar ) qs = 0.0
515
516	!
517	!-- Compute initial temperature field and other constants used in case
518	!-- of a sloping surface
519	IF ( sloping_surface ) CALL init_slope
520
521	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
522	THEN
523	!
524	!-- Initialization will completely be done by the user
525	CALL user_init_3d_model
526
527	ENDIF
528
529	!
530	!-- Calculate virtual potential temperature
531	IF ( humidity ) vpt = pt * ( 1.0 + 0.61 * q )
532
533	!
534	!-- Store initial profiles for output purposes etc.
535	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
536	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
537	IF ( ibc_uv_b == 0 ) THEN
538	hom(nzb,1,5,:) = -hom(nzb+1,1,5,:) ! due to satisfying the Dirichlet
539	hom(nzb,1,6,:) = -hom(nzb+1,1,6,:) ! condition with an extra layer
540	! below the surface where the u and v component change their sign
541	ENDIF
542	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
543	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
544	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
545
546	IF ( ocean ) THEN
547	!
548	!-- Store initial salinity profile
549	hom(:,1,26,:) = SPREAD( sa(:,nys,nxl), 2, statistic_regions+1 )
550	ENDIF
551
552	IF ( humidity ) THEN
553	!
554	!-- Store initial profile of total water content, virtual potential
555	!-- temperature
556	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
557	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
558	IF ( cloud_physics .OR. cloud_droplets ) THEN
559	!
560	!-- Store initial profile of specific humidity and potential
561	!-- temperature
562	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
563	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
564	ENDIF
565	ENDIF
566
567	IF ( passive_scalar ) THEN
568	!
569	!-- Store initial scalar profile
570	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
571	ENDIF
572
573	!
574	!-- Initialize fluxes at bottom surface
575	IF ( use_surface_fluxes ) THEN
576
577	IF ( constant_heatflux ) THEN
578	!
579	!-- Heat flux is prescribed
580	IF ( random_heatflux ) THEN
581	CALL disturb_heatflux
582	ELSE
583	shf = surface_heatflux
584	!
585	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
586	IF ( TRIM( topography ) /= 'flat' ) THEN
587	DO i = nxl-1, nxr+1
588	DO j = nys-1, nyn+1
589	IF ( nzb_s_inner(j,i) /= 0 ) THEN
590	shf(j,i) = wall_heatflux(0)
591	ENDIF
592	ENDDO
593	ENDDO
594	ENDIF
595	ENDIF
596	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
597	ENDIF
598
599	!
600	!-- Determine the near-surface water flux
601	IF ( humidity .OR. passive_scalar ) THEN
602	IF ( constant_waterflux ) THEN
603	qsws = surface_waterflux
604	IF ( ASSOCIATED( qsws_m ) ) qsws_m = qsws
605	ENDIF
606	ENDIF
607
608	ENDIF
609
610	!
611	!-- Initialize fluxes at top surface
612	!-- Currently, only the heatflux and salinity flux can be prescribed.
613	!-- The latent flux is zero in this case!
614	IF ( use_top_fluxes ) THEN
615
616	IF ( constant_top_heatflux ) THEN
617	!
618	!-- Heat flux is prescribed
619	tswst = top_heatflux
620	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
621
622	IF ( humidity .OR. passive_scalar ) THEN
623	qswst = 0.0
624	IF ( ASSOCIATED( qswst_m ) ) qswst_m = qswst
625	ENDIF
626
627	IF ( ocean ) THEN
628	saswsb = bottom_salinityflux
629	saswst = top_salinityflux
630	ENDIF
631	ENDIF
632
633	!
634	!-- Initialization in case of a coupled model run
635	IF ( coupling_mode == 'ocean_to_atmosphere' ) THEN
636	tswst = 0.0
637	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
638	ENDIF
639
640	ENDIF
641
642	!
643	!-- Initialize Prandtl layer quantities
644	IF ( prandtl_layer ) THEN
645
646	z0 = roughness_length
647
648	IF ( .NOT. constant_heatflux ) THEN
649	!
650	!-- Surface temperature is prescribed. Here the heat flux cannot be
651	!-- simply estimated, because therefore rif, u* and theta* would have
652	!-- to be computed by iteration. This is why the heat flux is assumed
653	!-- to be zero before the first time step. It approaches its correct
654	!-- value in the course of the first few time steps.
655	shf = 0.0
656	IF ( ASSOCIATED( shf_m ) ) shf_m = 0.0
657	ENDIF
658
659	IF ( humidity .OR. passive_scalar ) THEN
660	IF ( .NOT. constant_waterflux ) THEN
661	qsws = 0.0
662	IF ( ASSOCIATED( qsws_m ) ) qsws_m = 0.0
663	ENDIF
664	ENDIF
665
666	ENDIF
667
668	!
669	!-- Calculate the initial volume flow at the right and north boundary
670	IF ( conserve_volume_flow ) THEN
671
672	volume_flow_initial_l = 0.0
673	volume_flow_area_l = 0.0
674
675	IF ( nxr == nx ) THEN
676	DO j = nys, nyn
677	DO k = nzb_2d(j,nx) + 1, nzt
678	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
679	u(k,j,nx) * dzu(k)
680	volume_flow_area_l(1) = volume_flow_area_l(1) + dzu(k)
681	ENDDO
682	!
683	!-- Correction if velocity at nzb+1 has been set zero further above
684	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
685	u_nzb_p1_for_vfc(j)
686	ENDDO
687	ENDIF
688
689	IF ( nyn == ny ) THEN
690	DO i = nxl, nxr
691	DO k = nzb_2d(ny,i) + 1, nzt
692	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
693	v(k,ny,i) * dzu(k)
694	volume_flow_area_l(2) = volume_flow_area_l(2) + dzu(k)
695	ENDDO
696	!
697	!-- Correction if velocity at nzb+1 has been set zero further above
698	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
699	v_nzb_p1_for_vfc(i)
700	ENDDO
701	ENDIF
702
703	#if defined( __parallel )
704	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
705	2, MPI_REAL, MPI_SUM, comm2d, ierr )
706	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
707	2, MPI_REAL, MPI_SUM, comm2d, ierr )
708	#else
709	volume_flow_initial = volume_flow_initial_l
710	volume_flow_area = volume_flow_area_l
711	#endif
712	ENDIF
713
714	!
715	!-- For the moment, perturbation pressure and vertical velocity are zero
716	p = 0.0; w = 0.0
717
718	!
719	!-- Initialize array sums (must be defined in first call of pres)
720	sums = 0.0
721
722	!
723	!-- Treating cloud physics, liquid water content and precipitation amount
724	!-- are zero at beginning of the simulation
725	IF ( cloud_physics ) THEN
726	ql = 0.0
727	IF ( precipitation ) precipitation_amount = 0.0
728	ENDIF
729
730	!
731	!-- Initialize spectra
732	IF ( dt_dosp /= 9999999.9 ) THEN
733	spectrum_x = 0.0
734	spectrum_y = 0.0
735	ENDIF
736
737	!
738	!-- Impose vortex with vertical axis on the initial velocity profile
739	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
740	CALL init_rankine
741	ENDIF
742
743	!
744	!-- Impose temperature anomaly (advection test only)
745	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
746	CALL init_pt_anomaly
747	ENDIF
748
749	!
750	!-- If required, change the surface temperature at the start of the 3D run
751	IF ( pt_surface_initial_change /= 0.0 ) THEN
752	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
753	ENDIF
754
755	!
756	!-- If required, change the surface humidity/scalar at the start of the 3D
757	!-- run
758	IF ( ( humidity .OR. passive_scalar ) .AND. &
759	q_surface_initial_change /= 0.0 ) THEN
760	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
761	ENDIF
762
763	!
764	!-- Initialize the random number generator (from numerical recipes)
765	CALL random_function_ini
766
767	!
768	!-- Impose random perturbation on the horizontal velocity field and then
769	!-- remove the divergences from the velocity field
770	IF ( create_disturbances ) THEN
771	CALL disturb_field( nzb_u_inner, tend, u )
772	CALL disturb_field( nzb_v_inner, tend, v )
773	n_sor = nsor_ini
774	CALL pres
775	n_sor = nsor
776	ENDIF
777
778	!
779	!-- Once again set the perturbation pressure explicitly to zero in order to
780	!-- assure that it does not generate any divergences in the first time step.
781	!-- At t=0 the velocity field is free of divergence (as constructed above).
782	!-- Divergences being created during a time step are not yet known and thus
783	!-- cannot be corrected during the time step yet.
784	p = 0.0
785
786	!
787	!-- Initialize old and new time levels.
788	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
789	e_m = e; pt_m = pt; u_m = u; v_m = v; w_m = w; kh_m = kh; km_m = km
790	ELSE
791	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
792	ENDIF
793	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
794
795	IF ( humidity .OR. passive_scalar ) THEN
796	IF ( ASSOCIATED( q_m ) ) q_m = q
797	IF ( timestep_scheme(1:5) == 'runge' ) tq_m = 0.0
798	q_p = q
799	IF ( humidity .AND. ASSOCIATED( vpt_m ) ) vpt_m = vpt
800	ENDIF
801
802	IF ( ocean ) THEN
803	tsa_m = 0.0
804	sa_p = sa
805	ENDIF
806
807	!
808	!-- Initialize old timelevels needed for radiation boundary conditions
809	IF ( outflow_l ) THEN
810	u_m_l(:,:,:) = u(:,:,-1:1)
811	v_m_l(:,:,:) = v(:,:,-1:1)
812	w_m_l(:,:,:) = w(:,:,-1:1)
813	ENDIF
814	IF ( outflow_r ) THEN
815	u_m_r(:,:,:) = u(:,:,nx-1:nx+1)
816	v_m_r(:,:,:) = v(:,:,nx-1:nx+1)
817	w_m_r(:,:,:) = w(:,:,nx-1:nx+1)
818	ENDIF
819	IF ( outflow_s ) THEN
820	u_m_s(:,:,:) = u(:,-1:1,:)
821	v_m_s(:,:,:) = v(:,-1:1,:)
822	w_m_s(:,:,:) = w(:,-1:1,:)
823	ENDIF
824	IF ( outflow_n ) THEN
825	u_m_n(:,:,:) = u(:,ny-1:ny+1,:)
826	v_m_n(:,:,:) = v(:,ny-1:ny+1,:)
827	w_m_n(:,:,:) = w(:,ny-1:ny+1,:)
828	ENDIF
829
830	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' ) &
831	THEN
832	!
833	!-- Read binary data from restart file
834	CALL read_3d_binary
835
836	!
837	!-- Calculate initial temperature field and other constants used in case
838	!-- of a sloping surface
839	IF ( sloping_surface ) CALL init_slope
840
841	!
842	!-- Initialize new time levels (only done in order to set boundary values
843	!-- including ghost points)
844	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
845	IF ( humidity .OR. passive_scalar ) q_p = q
846	IF ( ocean ) sa_p = sa
847
848	ELSE
849	!
850	!-- Actually this part of the programm should not be reached
851	IF ( myid == 0 ) PRINT*,'+++ init_3d_model: unknown initializing ', &
852	'problem'
853	CALL local_stop
854	ENDIF
855
856	!
857	!-- If required, initialize dvrp-software
858	IF ( dt_dvrp /= 9999999.9 ) CALL init_dvrp
859
860	IF ( ocean ) THEN
861	!
862	!-- Initialize quantities needed for the ocean model
863	CALL init_ocean
864	ELSE
865	!
866	!-- Initialize quantities for handling cloud physics
867	!-- This routine must be called before init_particles, because
868	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
869	!-- init_particles) is not defined.
870	CALL init_cloud_physics
871	ENDIF
872
873	!
874	!-- If required, initialize particles
875	IF ( particle_advection ) CALL init_particles
876
877	!
878	!-- Initialize quantities for special advections schemes
879	CALL init_advec
880
881	!
882	!-- Initialize Rayleigh damping factors
883	rdf = 0.0
884	IF ( rayleigh_damping_factor /= 0.0 ) THEN
885	DO k = nzb+1, nzt
886	IF ( zu(k) >= rayleigh_damping_height ) THEN
887	rdf(k) = rayleigh_damping_factor * &
888	( SIN( pi * 0.5 * ( zu(k) - rayleigh_damping_height ) &
889	/ ( zu(nzt) - rayleigh_damping_height ) )&
890	)**2
891	ENDIF
892	ENDDO
893	ENDIF
894
895	!
896	!-- Initialize diffusivities used within the outflow damping layer in case of
897	!-- non-cyclic lateral boundaries. A linear increase is assumed over the first
898	!-- half of the width of the damping layer
899	IF ( bc_lr == 'dirichlet/radiation' ) THEN
900
901	DO i = nxl-1, nxr+1
902	IF ( i >= nx - outflow_damping_width ) THEN
903	km_damp_x(i) = km_damp_max * MIN( 1.0, &
904	( i - ( nx - outflow_damping_width ) ) / &
905	REAL( outflow_damping_width/2 ) &
906	)
907	ELSE
908	km_damp_x(i) = 0.0
909	ENDIF
910	ENDDO
911
912	ELSEIF ( bc_lr == 'radiation/dirichlet' ) THEN
913
914	DO i = nxl-1, nxr+1
915	IF ( i <= outflow_damping_width ) THEN
916	km_damp_x(i) = km_damp_max * MIN( 1.0, &
917	( outflow_damping_width - i ) / &
918	REAL( outflow_damping_width/2 ) &
919	)
920	ELSE
921	km_damp_x(i) = 0.0
922	ENDIF
923	ENDDO
924
925	ENDIF
926
927	IF ( bc_ns == 'dirichlet/radiation' ) THEN
928
929	DO j = nys-1, nyn+1
930	IF ( j >= ny - outflow_damping_width ) THEN
931	km_damp_y(j) = km_damp_max * MIN( 1.0, &
932	( j - ( ny - outflow_damping_width ) ) / &
933	REAL( outflow_damping_width/2 ) &
934	)
935	ELSE
936	km_damp_y(j) = 0.0
937	ENDIF
938	ENDDO
939
940	ELSEIF ( bc_ns == 'radiation/dirichlet' ) THEN
941
942	DO j = nys-1, nyn+1
943	IF ( j <= outflow_damping_width ) THEN
944	km_damp_y(j) = km_damp_max * MIN( 1.0, &
945	( outflow_damping_width - j ) / &
946	REAL( outflow_damping_width/2 ) &
947	)
948	ELSE
949	km_damp_y(j) = 0.0
950	ENDIF
951	ENDDO
952
953	ENDIF
954
955	!
956	!-- Initialize local summation arrays for UP flow_statistics. This is necessary
957	!-- because they may not yet have been initialized when they are called from
958	!-- flow_statistics (or - depending on the chosen model run - are never
959	!-- initialized)
960	sums_divnew_l = 0.0
961	sums_divold_l = 0.0
962	sums_l_l = 0.0
963	sums_up_fraction_l = 0.0
964	sums_wsts_bc_l = 0.0
965
966	!
967	!-- Pre-set masks for regional statistics. Default is the total model domain.
968	rmask = 1.0
969
970	!
971	!-- User-defined initializing actions. Check afterwards, if maximum number
972	!-- of allowed timeseries is not exceeded
973	CALL user_init
974
975	IF ( dots_num > dots_max ) THEN
976	IF ( myid == 0 ) THEN
977	PRINT*, '+++ user_init: number of time series quantities exceeds', &
978	' its maximum of dots_max = ', dots_max
979	PRINT*, ' Please increase dots_max in modules.f90.'
980	ENDIF
981	CALL local_stop
982	ENDIF
983
984	!
985	!-- Input binary data file is not needed anymore. This line must be placed
986	!-- after call of user_init!
987	CALL close_file( 13 )
988
989	!
990	!-- Compute total sum of active mask grid points
991	!-- ngp_2dh: number of grid points of a horizontal cross section through the
992	!-- total domain
993	!-- ngp_3d: number of grid points of the total domain
994	!-- Note: The lower vertical index nzb_s_outer imposes a small error on the 2D
995	!-- ---- averages of staggered variables such as u and v due to the topography
996	!-- arrangement on the staggered grid. Maybe revise later.
997	ngp_2dh_outer_l = 0
998	ngp_2dh_outer = 0
999	ngp_2dh_l = 0
1000	ngp_2dh = 0
1001	ngp_3d_inner_l = 0
1002	ngp_3d_inner = 0
1003	ngp_3d = 0
1004	ngp_sums = ( nz + 2 ) * ( pr_palm + max_pr_user )
1005
1006	DO sr = 0, statistic_regions
1007	DO i = nxl, nxr
1008	DO j = nys, nyn
1009	IF ( rmask(j,i,sr) == 1.0 ) THEN
1010	!
1011	!-- All xy-grid points
1012	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
1013	!
1014	!-- xy-grid points above topography
1015	DO k = nzb_s_outer(j,i), nz + 1
1016	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
1017	ENDDO
1018	!
1019	!-- All grid points of the total domain above topography
1020	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
1021	( nz - nzb_s_inner(j,i) + 2 )
1022	ENDIF
1023	ENDDO
1024	ENDDO
1025	ENDDO
1026
1027	sr = statistic_regions + 1
1028	#if defined( __parallel )
1029	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
1030	comm2d, ierr )
1031	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
1032	MPI_INTEGER, MPI_SUM, comm2d, ierr )
1033	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner(0), sr, MPI_INTEGER, &
1034	MPI_SUM, comm2d, ierr )
1035	#else
1036	ngp_2dh = ngp_2dh_l
1037	ngp_2dh_outer = ngp_2dh_outer_l
1038	ngp_3d_inner = ngp_3d_inner_l
1039	#endif
1040
1041	ngp_3d = ngp_2dh * ( nz + 2 )
1042
1043	!
1044	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
1045	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
1046	!-- the respective subdomain lie below the surface topography
1047	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
1048	ngp_3d_inner = MAX( 1, ngp_3d_inner(:) )
1049
1050	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l )
1051
1052
1053	END SUBROUTINE init_3d_model

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