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source: palm/trunk/SOURCE/init_3d_model.f90 @ 46

Last change on this file since 46 was 46, checked in by raasch, 17 years ago
updating parts of Marcus changes
Property svn:keywords set to `Id`
File size: 30.0 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	!
11	! Former revisions:
12	! -----------------
13	! $Id: init_3d_model.f90 46 2007-03-05 06:00:47Z 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	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
425	THEN
426	!
427	!-- Initialization will completely be done by the user
428	CALL user_init_3d_model
429
430	ENDIF
431
432	!
433	!-- Calculate virtual potential temperature
434	IF ( moisture ) vpt = pt * ( 1.0 + 0.61 * q )
435
436	!
437	!-- Store initial profiles for output purposes etc.
438	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
439	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
440	IF ( ibc_uv_b == 0 ) THEN
441	hom(nzb,1,5,:) = -hom(nzb+1,1,5,:) ! due to satisfying the Dirichlet
442	hom(nzb,1,6,:) = -hom(nzb+1,1,6,:) ! condition with an extra layer
443	! below the surface where the u and v component change their sign
444	ENDIF
445	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
446	hom(:,1,23,:) = SPREAD( km(:,nys,nxl), 2, statistic_regions+1 )
447	hom(:,1,24,:) = SPREAD( kh(:,nys,nxl), 2, statistic_regions+1 )
448
449
450	IF ( moisture ) THEN
451	!
452	!-- Store initial profile of total water content, virtual potential
453	!-- temperature
454	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
455	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
456	IF ( cloud_physics .OR. cloud_droplets ) THEN
457	!
458	!-- Store initial profile of specific humidity and potential
459	!-- temperature
460	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
461	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
462	ENDIF
463	ENDIF
464
465	IF ( passive_scalar ) THEN
466	!
467	!-- Store initial scalar profile
468	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
469	ENDIF
470
471	!
472	!-- Initialize fluxes at bottom surface
473	IF ( use_surface_fluxes ) THEN
474
475	IF ( constant_heatflux ) THEN
476	!
477	!-- Heat flux is prescribed
478	IF ( random_heatflux ) THEN
479	CALL disturb_heatflux
480	ELSE
481	shf = surface_heatflux
482	!
483	!-- Over topography surface_heatflux is replaced by wall_heatflux(0)
484	IF ( TRIM( topography ) /= 'flat' ) THEN
485	DO i = nxl-1, nxr+1
486	DO j = nys-1, nyn+1
487	IF ( nzb_s_inner(j,i) /= 0 ) THEN
488	shf(j,i) = wall_heatflux(0)
489	ENDIF
490	ENDDO
491	ENDDO
492	ENDIF
493	ENDIF
494	IF ( ASSOCIATED( shf_m ) ) shf_m = shf
495	ENDIF
496
497	!
498	!-- Determine the near-surface water flux
499	IF ( moisture .OR. passive_scalar ) THEN
500	IF ( constant_waterflux ) THEN
501	qsws = surface_waterflux
502	IF ( ASSOCIATED( qsws_m ) ) qsws_m = qsws
503	ENDIF
504	ENDIF
505
506	ENDIF
507
508	!
509	!-- Initialize fluxes at top surface
510	!-- Currently, only the heatflux can be prescribed. The latent flux is
511	!-- zero in this case!
512	IF ( use_top_fluxes ) THEN
513
514	IF ( constant_top_heatflux ) THEN
515	!
516	!-- Heat flux is prescribed
517	tswst = top_heatflux
518	IF ( ASSOCIATED( tswst_m ) ) tswst_m = tswst
519
520	IF ( moisture .OR. passive_scalar ) THEN
521	qswst = 0.0
522	IF ( ASSOCIATED( qswst_m ) ) qswst_m = qswst
523	ENDIF
524	ENDIF
525
526	ENDIF
527
528	!
529	!-- Initialize Prandtl layer quantities
530	IF ( prandtl_layer ) THEN
531
532	z0 = roughness_length
533
534	IF ( .NOT. constant_heatflux ) THEN
535	!
536	!-- Surface temperature is prescribed. Here the heat flux cannot be
537	!-- simply estimated, because therefore rif, u* and theta* would have
538	!-- to be computed by iteration. This is why the heat flux is assumed
539	!-- to be zero before the first time step. It approaches its correct
540	!-- value in the course of the first few time steps.
541	shf = 0.0
542	IF ( ASSOCIATED( shf_m ) ) shf_m = 0.0
543	ENDIF
544
545	IF ( moisture .OR. passive_scalar ) THEN
546	IF ( .NOT. constant_waterflux ) THEN
547	qsws = 0.0
548	IF ( ASSOCIATED( qsws_m ) ) qsws_m = 0.0
549	ENDIF
550	ENDIF
551
552	ENDIF
553
554	!
555	!-- Calculate the initial volume flow at the right and north boundary
556	IF ( conserve_volume_flow ) THEN
557
558	volume_flow_initial_l = 0.0
559	volume_flow_area_l = 0.0
560
561	IF ( nxr == nx ) THEN
562	DO j = nys, nyn
563	DO k = nzb_2d(j,nx) + 1, nzt
564	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
565	u(k,j,nx) * dzu(k)
566	volume_flow_area_l(1) = volume_flow_area_l(1) + dzu(k)
567	ENDDO
568	ENDDO
569	ENDIF
570
571	IF ( nyn == ny ) THEN
572	DO i = nxl, nxr
573	DO k = nzb_2d(ny,i) + 1, nzt
574	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
575	v(k,ny,i) * dzu(k)
576	volume_flow_area_l(2) = volume_flow_area_l(2) + dzu(k)
577	ENDDO
578	ENDDO
579	ENDIF
580
581	#if defined( __parallel )
582	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
583	2, MPI_REAL, MPI_SUM, comm2d, ierr )
584	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
585	2, MPI_REAL, MPI_SUM, comm2d, ierr )
586	#else
587	volume_flow_initial = volume_flow_initial_l
588	volume_flow_area = volume_flow_area_l
589	#endif
590	ENDIF
591
592	!
593	!-- For the moment, perturbation pressure and vertical velocity are zero
594	p = 0.0; w = 0.0
595
596	!
597	!-- Initialize array sums (must be defined in first call of pres)
598	sums = 0.0
599
600	!
601	!-- Treating cloud physics, liquid water content is zero at beginning of
602	!-- the simulation
603	IF ( cloud_physics ) ql = 0.0
604
605	!
606	!-- Initialize spectra
607	IF ( dt_dosp /= 9999999.9 ) THEN
608	spectrum_x = 0.0
609	spectrum_y = 0.0
610	ENDIF
611
612	!
613	!-- Impose vortex with vertical axis on the initial velocity profile
614	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
615	CALL init_rankine
616	ENDIF
617
618	!
619	!-- Impose temperature anomaly (advection test only)
620	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 ) THEN
621	CALL init_pt_anomaly
622	ENDIF
623
624	!
625	!-- If required, change the surface temperature at the start of the 3D run
626	IF ( pt_surface_initial_change /= 0.0 ) THEN
627	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
628	ENDIF
629
630	!
631	!-- If required, change the surface humidity/scalar at the start of the 3D
632	!-- run
633	IF ( ( moisture .OR. passive_scalar ) .AND. &
634	q_surface_initial_change /= 0.0 ) THEN
635	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
636	ENDIF
637
638	!
639	!-- Initialize the random number generator (from numerical recipes)
640	CALL random_function_ini
641
642	!
643	!-- Impose random perturbation on the horizontal velocity field and then
644	!-- remove the divergences from the velocity field
645	IF ( create_disturbances ) THEN
646	CALL disturb_field( nzb_u_inner, tend, u, uxrp, 0 )
647	CALL disturb_field( nzb_v_inner, tend, v, 0, vynp )
648	n_sor = nsor_ini
649	CALL pres
650	n_sor = nsor
651	ENDIF
652
653	!
654	!-- Once again set the perturbation pressure explicitly to zero in order to
655	!-- assure that it does not generate any divergences in the first time step.
656	!-- At t=0 the velocity field is free of divergence (as constructed above).
657	!-- Divergences being created during a time step are not yet known and thus
658	!-- cannot be corrected during the time step yet.
659	p = 0.0
660
661	!
662	!-- Initialize old and new time levels.
663	IF ( timestep_scheme(1:5) /= 'runge' ) THEN
664	e_m = e; pt_m = pt; u_m = u; v_m = v; w_m = w; kh_m = kh; km_m = km
665	ELSE
666	te_m = 0.0; tpt_m = 0.0; tu_m = 0.0; tv_m = 0.0; tw_m = 0.0
667	ENDIF
668	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
669
670	IF ( moisture .OR. passive_scalar ) THEN
671	IF ( ASSOCIATED( q_m ) ) q_m = q
672	IF ( timestep_scheme(1:5) == 'runge' ) tq_m = 0.0
673	q_p = q
674	IF ( moisture .AND. ASSOCIATED( vpt_m ) ) vpt_m = vpt
675	ENDIF
676
677	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' ) &
678	THEN
679	!
680	!-- Read binary data from restart file
681	CALL read_3d_binary
682
683	!
684	!-- Calculate initial temperature field and other constants used in case
685	!-- of a sloping surface
686	IF ( sloping_surface ) CALL init_slope
687
688	!
689	!-- Initialize new time levels (only done in order to set boundary values
690	!-- including ghost points)
691	e_p = e; pt_p = pt; u_p = u; v_p = v; w_p = w
692	IF ( moisture .OR. passive_scalar ) q_p = q
693
694	ELSE
695	!
696	!-- Actually this part of the programm should not be reached
697	IF ( myid == 0 ) PRINT*,'+++ init_3d_model: unknown initializing ', &
698	'problem'
699	CALL local_stop
700	ENDIF
701
702	!
703	!-- If required, initialize dvrp-software
704	! WRITE ( 9, * ) '*** myid=', myid, ' vor init_dvrp'
705	! CALL FLUSH_( 9 )
706	IF ( dt_dvrp /= 9999999.9 ) CALL init_dvrp
707	! WRITE ( 9, * ) '*** myid=', myid, ' nach init_dvrp'
708	! CALL FLUSH_( 9 )
709
710	!
711	!-- If required, initialize quantities for handling cloud physics
712	!-- This routine must be called before init_particles, because
713	!-- otherwise, array pt_d_t, needed in data_output_dvrp (called by
714	!-- init_particles) is not defined.
715	CALL init_cloud_physics
716
717	!
718	!-- If required, initialize particles
719	! WRITE ( 9, * ) '*** myid=', myid, ' vor init_particles'
720	! CALL FLUSH_( 9 )
721	CALL init_particles
722	! WRITE ( 9, * ) '*** myid=', myid, ' nach init_particles'
723	! CALL FLUSH_( 9 )
724
725	!
726	!-- Initialize quantities for special advections schemes
727	CALL init_advec
728
729	!
730	!-- Initialize Rayleigh damping factors
731	rdf = 0.0
732	IF ( rayleigh_damping_factor /= 0.0 ) THEN
733	DO k = nzb+1, nzt
734	IF ( zu(k) >= rayleigh_damping_height ) THEN
735	rdf(k) = rayleigh_damping_factor * &
736	( SIN( pi * 0.5 * ( zu(k) - rayleigh_damping_height ) &
737	/ ( zu(nzt) - rayleigh_damping_height ) )&
738	)**2
739	ENDIF
740	ENDDO
741	ENDIF
742
743	!
744	!-- Initialize diffusivities used within the outflow damping layer in case of
745	!-- non-cyclic lateral boundaries. A linear increase is assumed over the first
746	!-- half of the width of the damping layer
747	IF ( bc_lr /= 'cyclic' ) THEN
748
749	DO i = nxl-1, nxr+1
750
751	IF ( outflow_r ) THEN
752
753	IF ( i >= nx - outflow_damping_width ) THEN
754	km_damp_x(i) = km_damp_max * MIN( 1.0, &
755	( i - ( nx - outflow_damping_width ) ) / &
756	REAL( outflow_damping_width/2 ) &
757	)
758	ELSE
759	km_damp_x(i) = 0.0
760	ENDIF
761
762	ELSEIF ( outflow_l ) THEN
763
764	IF ( i <= outflow_damping_width ) THEN
765	km_damp_x(i) = km_damp_max * MIN( 1.0, &
766	( outflow_damping_width - i ) / &
767	REAL( outflow_damping_width/2 ) &
768	)
769	ELSE
770	km_damp_x(i) = 0.0
771	ENDIF
772
773	ENDIF
774
775	ENDDO
776	ENDIF
777
778	IF ( bc_ns /= 'cyclic' ) THEN
779
780	DO j = nys-1, nyn+1
781
782	IF ( outflow_n ) THEN
783
784	IF ( j >= ny - outflow_damping_width ) THEN
785	km_damp_y(j) = km_damp_max * MIN( 1.0, &
786	( j - ( ny - outflow_damping_width ) ) / &
787	REAL( outflow_damping_width/2 ) &
788	)
789	ELSE
790	km_damp_y(j) = 0.0
791	ENDIF
792
793	ELSEIF ( outflow_s ) THEN
794
795	IF ( j <= outflow_damping_width ) THEN
796	km_damp_y(j) = km_damp_max * MIN( 1.0, &
797	( outflow_damping_width - j ) / &
798	REAL( outflow_damping_width/2 ) &
799	)
800	ELSE
801	km_damp_y(j) = 0.0
802	ENDIF
803
804	ENDIF
805
806	ENDDO
807	ENDIF
808
809	!
810	!-- Initialize local summation arrays for UP flow_statistics. This is necessary
811	!-- because they may not yet have been initialized when they are called from
812	!-- flow_statistics (or - depending on the chosen model run - are never
813	!-- initialized)
814	sums_divnew_l = 0.0
815	sums_divold_l = 0.0
816	sums_l_l = 0.0
817	sums_up_fraction_l = 0.0
818	sums_wsts_bc_l = 0.0
819
820	!
821	!-- Pre-set masks for regional statistics. Default is the total model domain.
822	rmask = 1.0
823
824	!
825	!-- User-defined initializing actions
826	CALL user_init
827
828	!
829	!-- Input binary data file is not needed anymore. This line must be placed
830	!-- after call of user_init!
831	CALL close_file( 13 )
832
833	!
834	!-- Compute total sum of active mask grid points
835	!-- ngp_2dh: number of grid points of a horizontal cross section through the
836	!-- total domain
837	!-- ngp_3d: number of grid points of the total domain
838	!-- Note: The lower vertical index nzb_s_outer imposes a small error on the 2D
839	!-- ---- averages of staggered variables such as u and v due to the topography
840	!-- arrangement on the staggered grid. Maybe revise later.
841	ngp_2dh_outer_l = 0
842	ngp_2dh_outer = 0
843	ngp_2dh_l = 0
844	ngp_2dh = 0
845	ngp_3d_inner_l = 0
846	ngp_3d_inner = 0
847	ngp_3d = 0
848	ngp_sums = ( nz + 2 ) * var_sum
849
850	DO sr = 0, statistic_regions
851	DO i = nxl, nxr
852	DO j = nys, nyn
853	IF ( rmask(j,i,sr) == 1.0 ) THEN
854	!
855	!-- All xy-grid points
856	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
857	!
858	!-- xy-grid points above topography
859	DO k = nzb_s_outer(j,i), nz + 1
860	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + 1
861	ENDDO
862	!
863	!-- All grid points of the total domain above topography
864	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + &
865	( nz - nzb_s_inner(j,i) + 2 )
866	ENDIF
867	ENDDO
868	ENDDO
869	ENDDO
870
871	sr = statistic_regions + 1
872	#if defined( __parallel )
873	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
874	comm2d, ierr )
875	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
876	MPI_INTEGER, MPI_SUM, comm2d, ierr )
877	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner(0), sr, MPI_INTEGER, &
878	MPI_SUM, comm2d, ierr )
879	#else
880	ngp_2dh = ngp_2dh_l
881	ngp_2dh_outer = ngp_2dh_outer_l
882	ngp_3d_inner = ngp_3d_inner_l
883	#endif
884
885	ngp_3d = ngp_2dh * ( nz + 2 )
886
887	!
888	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
889	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
890	!-- the respective subdomain lie below the surface topography
891	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
892	ngp_3d_inner = MAX( 1, ngp_3d_inner(:) )
893
894	DEALLOCATE( ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l )
895
896
897	END SUBROUTINE init_3d_model

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