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init_3d_model.f90 @ 4899

Last change on this file since 4899 was 4878, checked in by suehring, 4 years ago

Rename resize_array into add_ghost_layers; remove number of passed indices; replace subroutine calls with interface name

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/palm/branches/chemistry/SOURCE/init_3d_model.f90	2047-3190,3218-3297
/palm/branches/rans/SOURCE/init_3d_model.f90	2078-3128
/palm/branches/resler/SOURCE/init_3d_model.f90	2023-4492
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1	!> @file init_3d_model.f90
2	!--------------------------------------------------------------------------------------------------!
3	! This file is part of the PALM model system.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the terms of the GNU General
6	! Public License as published by the Free Software Foundation, either version 3 of the License, or
7	! (at your option) any later version.
8	!
9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
10	! implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
11	! Public License for more details.
12	!
13	! You should have received a copy of the GNU General Public License along with PALM. If not, see
14	! <http://www.gnu.org/licenses/>.
15	!
16	! Copyright 1997-2021 Leibniz Universitaet Hannover
17	!--------------------------------------------------------------------------------------------------!
18	!
19	! Current revisions:
20	! ------------------
21	!
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: init_3d_model.f90 4878 2021-02-18 09:47:49Z raasch $
26	! Rename resize_array into add_ghost_layers and remove number of passed indices
27	!
28	! 4877 2021-02-17 16:17:35Z suehring
29	! Bugfix in initialization of vertical surfaces with roughness and surface heat fluxes
30	!
31	! 4848 2021-01-21 15:51:51Z gronemeier
32	! replaced use_syn_turb_gen by syn_turb_gen
33	!
34	! 4845 2021-01-18 11:15:37Z raasch
35	! removed allocation and initialization of arrays required for radiation boundary conditions
36	!
37	! 4828 2021-01-05 11:21:41Z Giersch
38	! Add possibility to initialize surface flux of passive scalar via static driver
39	!
40	! 4783 2020-11-13 13:58:45Z raasch
41	! bugfix for reading restart data with MPI-I/O (does not work with blockwise I/O)
42	!
43	! 4680 2020-09-16 10:20:34Z gronemeier
44	! Add option to fix date or time of the simulation
45	!
46	! 4671 2020-09-09 20:27:58Z pavelkrc
47	! Implementation of downward facing USM and LSM surfaces
48	!
49	! 4648 2020-08-25 07:52:08Z raasch
50	! file re-formatted to follow the PALM coding standard
51	!
52	! 4548 2020-05-28 19:36:45Z suehring
53	! Bugfix, move call for lsf_forcing_surf after lsf_init is called
54	!
55	! 4514 2020-04-30 16:29:59Z suehring
56	! Add possibility to initialize surface sensible and latent heat fluxes via a static driver.
57	!
58	! 4493 2020-04-10 09:49:43Z pavelkrc
59	! Overwrite u_init, v_init, pt_init, q_init and s_init with hom for all cyclic_fill-cases, not only
60	! for turbulent_inflow = .TRUE.
61	!
62	! 4360 2020-01-07 11:25:50Z suehring
63	! Introduction of wall_flags_total_0, which currently sets bits based on static topography
64	! information used in wall_flags_static_0
65	!
66	! 4329 2019-12-10 15:46:36Z motisi
67	! Renamed wall_flags_0 to wall_flags_static_0
68	!
69	! 4286 2019-10-30 16:01:14Z resler
70	! implement new palm_date_time_mod
71	!
72	! 4223 2019-09-10 09:20:47Z gronemeier
73	! Deallocate temporary string array since it may be re-used to read different input data in other
74	! modules
75	!
76	! 4186 2019-08-23 16:06:14Z suehring
77	! Design change, use variables defined in netcdf_data_input_mod to read netcd variables rather than
78	! define local ones.
79	!
80	! 4185 2019-08-23 13:49:38Z oliver.maas
81	! For initializing_actions = ' cyclic_fill':
82	! Overwrite u_init, v_init, pt_init, q_init and s_init with the (temporally) and horizontally
83	! averaged vertical profiles from the end of the prerun, because these profiles shall be used as the
84	! basic state for the rayleigh damping and the pt_damping.
85	!
86	! 4182 2019-08-22 15:20:23Z scharf
87	! Corrected "Former revisions" section
88	!
89	! 4168 2019-08-16 13:50:17Z suehring
90	! Replace function get_topography_top_index by topo_top_ind
91	!
92	! 4151 2019-08-09 08:24:30Z suehring
93	! Add netcdf directive around input calls (fix for last commit)
94	!
95	! 4150 2019-08-08 20:00:47Z suehring
96	! Input of additional surface variables independent on land- or urban-surface model
97	!
98	! 4131 2019-08-02 11:06:18Z monakurppa
99	! Allocate sums and sums_l to allow profile output for salsa variables.
100	!
101	! 4130 2019-08-01 13:04:13Z suehring
102	! Effectively reduce 3D initialization to 1D initial profiles. This is because 3D initialization
103	! produces structures in the w-component that are correlated with the processor grid for some
104	! unknown reason
105	!
106	! 4090 2019-07-11 15:06:47Z Giersch
107	! Unused variables removed
108	!
109	! 4088 2019-07-11 13:57:56Z Giersch
110	! Pressure and density profile calculations revised using basic functions
111	!
112	! 4048 2019-06-21 21:00:21Z knoop
113	! Further modularization of particle code components
114	!
115	! 4017 2019-06-06 12:16:46Z schwenkel
116	! Convert most location messages to debug messages to reduce output in job logfile to a minimum
117	!
118	! unused variable removed
119	!
120	! 3937 2019-04-29 15:09:07Z suehring
121	! Move initialization of synthetic turbulence generator behind initialization of offline nesting.
122	! Remove call for stg_adjust, as this is now already done in stg_init.
123	!
124	! 3900 2019-04-16 15:17:43Z suehring
125	! Fix problem with LOD = 2 initialization
126	!
127	! 3885 2019-04-11 11:29:34Z kanani
128	! Changes related to global restructuring of location messages and introduction of additional debug
129	! messages
130	!
131	! 3849 2019-04-01 16:35:16Z knoop
132	! Move initialization of rmask before initializing user_init_arrays
133	!
134	! 3711 2019-01-31 13:44:26Z knoop
135	! Introduced module_interface_init_checks for post-init checks in modules
136	!
137	! 3700 2019-01-26 17:03:42Z knoop
138	! Some interface calls moved to module_interface + cleanup
139	!
140	! 3648 2019-01-02 16:35:46Z suehring
141	! Rename subroutines for surface-data output
142	!
143	! Revision 1.1 1998/03/09 16:22:22 raasch
144	! Initial revision
145	!
146	!
147	! Description:
148	! ------------
149	!> Allocation of arrays and initialization of the 3D model via
150	!> a) pre-run the 1D model
151	!> or
152	!> b) pre-set constant linear profiles
153	!> or
154	!> c) read values of a previous run
155	!--------------------------------------------------------------------------------------------------!
156	SUBROUTINE init_3d_model
157
158
159	USE advec_ws
160
161	USE arrays_3d
162
163	USE basic_constants_and_equations_mod, &
164	ONLY: barometric_formula, c_p, exner_function, exner_function_invers, g, &
165	ideal_gas_law_rho, ideal_gas_law_rho_pt, l_v, pi
166
167	USE bulk_cloud_model_mod, &
168	ONLY: bulk_cloud_model
169
170	USE chem_modules, &
171	ONLY: max_pr_cs ! ToDo: this dependency needs to be removed cause it is ugly #new_dom
172
173	USE control_parameters
174
175	USE exchange_horiz_mod, &
176	ONLY: exchange_horiz_2d
177
178	USE grid_variables, &
179	ONLY: dx, dy, ddx2_mg, ddy2_mg
180
181	USE indices
182
183	USE kinds
184
185	USE lsf_nudging_mod, &
186	ONLY: ls_forcing_surf
187
188	USE model_1d_mod, &
189	ONLY: init_1d_model, l1d, u1d, v1d
190
191	USE module_interface, &
192	ONLY: module_interface_init_arrays, &
193	module_interface_init, &
194	module_interface_init_checks
195
196	USE multi_agent_system_mod, &
197	ONLY: agents_active, mas_init
198
199	USE netcdf_interface, &
200	ONLY: dots_max
201
202	USE netcdf_data_input_mod, &
203	ONLY: add_ghost_layers, &
204	char_fill, &
205	check_existence, &
206	close_input_file, &
207	get_attribute, &
208	get_variable, &
209	init_3d, &
210	input_pids_static, &
211	inquire_num_variables, &
212	inquire_variable_names, &
213	input_file_static, &
214	netcdf_data_input_init_3d, &
215	num_var_pids, &
216	open_read_file, &
217	pids_id, &
218	real_2d, &
219	vars_pids
220
221	USE nesting_offl_mod, &
222	ONLY: nesting_offl_init
223
224	USE palm_date_time_mod, &
225	ONLY: init_date_time
226
227	USE pegrid
228
229	#if defined( __parallel )
230	USE pmc_interface, &
231	ONLY: nested_run
232	#endif
233
234	USE random_function_mod
235
236	USE random_generator_parallel, &
237	ONLY: init_parallel_random_generator
238
239	USE read_restart_data_mod, &
240	ONLY: rrd_local, rrd_read_parts_of_global
241
242	USE statistics, &
243	ONLY: hom, hom_sum, mean_surface_level_height, pr_palm, rmask, statistic_regions, sums, &
244	sums_divnew_l, sums_divold_l, sums_l, sums_l_l, sums_wsts_bc_l, ts_value, &
245	weight_pres, weight_substep
246
247	USE synthetic_turbulence_generator_mod, &
248	ONLY: stg_init
249
250	USE surface_layer_fluxes_mod, &
251	ONLY: init_surface_layer_fluxes
252
253	USE surface_mod, &
254	ONLY : init_single_surface_properties, &
255	init_surface_arrays, &
256	init_surfaces, &
257	surf_def_h, &
258	surf_def_v, &
259	surf_lsm_h, &
260	surf_usm_h
261
262	#if defined( _OPENACC )
263	USE surface_mod, &
264	ONLY : bc_h
265	#endif
266
267	USE surface_data_output_mod, &
268	ONLY: surface_data_output_init
269
270	USE transpose_indices
271
272
273	IMPLICIT NONE
274
275	INTEGER(iwp) :: i !< grid index in x direction
276	INTEGER(iwp) :: ind_array(1) !< dummy used to determine start index for external pressure forcing
277	INTEGER(iwp) :: j !< grid index in y direction
278	INTEGER(iwp) :: k !< grid index in z direction
279	INTEGER(iwp) :: k_surf !< surface level index
280	INTEGER(iwp) :: l !< running index over surface orientation
281	INTEGER(iwp) :: m !< index of surface element in surface data type
282	INTEGER(iwp) :: nz_u_shift !< topography-top index on u-grid, used to vertically shift initial profiles
283	INTEGER(iwp) :: nz_v_shift !< topography-top index on v-grid, used to vertically shift initial profiles
284	INTEGER(iwp) :: nz_w_shift !< topography-top index on w-grid, used to vertically shift initial profiles
285	INTEGER(iwp) :: nz_s_shift !< topography-top index on scalar-grid, used to vertically shift initial profiles
286	INTEGER(iwp) :: nz_u_shift_l !< topography-top index on u-grid, used to vertically shift initial profiles
287	INTEGER(iwp) :: nz_v_shift_l !< topography-top index on v-grid, used to vertically shift initial profiles
288	INTEGER(iwp) :: nz_w_shift_l !< topography-top index on w-grid, used to vertically shift initial profiles
289	INTEGER(iwp) :: nz_s_shift_l !< topography-top index on scalar-grid, used to vertically shift initial profiles
290	INTEGER(iwp) :: nzt_l !< index of top PE boundary for multigrid level
291	INTEGER(iwp) :: sr !< index of statistic region
292
293	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ngp_2dh_l !< toal number of horizontal grid points in statistical region on
294	!< subdomain
295
296	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l !< number of horizontal non-wall bounded grid points on
297	!< subdomain
298	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_s_inner_l !< number of horizontal non-topography grid points on
299	!< subdomain
300
301	REAL(wp) :: dx_l !< grid spacing along x on different multigrid level
302	REAL(wp) :: dy_l !< grid spacing along y on different multigrid level
303
304	REAL(wp), DIMENSION(:), ALLOCATABLE :: init_l !< dummy array used for averaging 3D data to obtain
305	!< inital profiles
306	REAL(wp), DIMENSION(:), ALLOCATABLE :: mean_surface_level_height_l !< mean surface level height on subdomain
307	REAL(wp), DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_l !< total number of non-topography grid points on subdomain
308	REAL(wp), DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_tmp !< total number of non-topography grid points
309	REAL(wp), DIMENSION(:), ALLOCATABLE :: p_hydrostatic !< hydrostatic pressure
310
311	REAL(wp), DIMENSION(1:3) :: volume_flow_area_l !< area of lateral and top model domain surface on local subdomain
312	REAL(wp), DIMENSION(1:3) :: volume_flow_initial_l !< initial volume flow into model domain
313
314	TYPE(real_2d) :: tmp_2d !< temporary variable to input additional surface-data from static file
315
316	CALL location_message( 'model initialization', 'start' )
317	!
318	!-- Set reference date-time
319	CALL init_date_time( date_time_str=origin_date_time, &
320	use_fixed_date=use_fixed_date, &
321	use_fixed_time=use_fixed_time )
322
323	IF ( debug_output ) CALL debug_message( 'allocating arrays', 'start' )
324	!
325	!-- Allocate arrays
326	ALLOCATE( mean_surface_level_height(0:statistic_regions), &
327	mean_surface_level_height_l(0:statistic_regions), &
328	ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
329	ngp_3d(0:statistic_regions), &
330	ngp_3d_inner(0:statistic_regions), &
331	ngp_3d_inner_l(0:statistic_regions), &
332	ngp_3d_inner_tmp(0:statistic_regions), &
333	sums_divnew_l(0:statistic_regions), &
334	sums_divold_l(0:statistic_regions) )
335	ALLOCATE( dp_smooth_factor(nzb:nzt), rdf(nzb+1:nzt), rdf_sc(nzb+1:nzt) )
336	ALLOCATE( ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
337	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
338	ngp_2dh_s_inner(nzb:nzt+1,0:statistic_regions), &
339	ngp_2dh_s_inner_l(nzb:nzt+1,0:statistic_regions), &
340	rmask(nysg:nyng,nxlg:nxrg,0:statistic_regions), &
341	sums(nzb:nzt+1,pr_palm+max_pr_user+max_pr_cs+max_pr_salsa), &
342	sums_l(nzb:nzt+1,pr_palm+max_pr_user+max_pr_cs+max_pr_salsa,0:threads_per_task-1), &
343	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
344	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions) )
345	ALLOCATE( ts_value(dots_max,0:statistic_regions) )
346	ALLOCATE( ptdf_x(nxlg:nxrg), ptdf_y(nysg:nyng) )
347
348	ALLOCATE( d(nzb+1:nzt,nys:nyn,nxl:nxr), &
349	p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
350	tend(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
351
352	ALLOCATE( pt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
353	pt_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
354	u_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
355	u_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
356	u_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
357	v_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
358	v_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
359	v_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
360	w_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
361	w_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
362	w_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
363	IF ( .NOT. neutral ) THEN
364	ALLOCATE( pt_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
365	ENDIF
366	!
367	!-- Pre-set masks for regional statistics. Default is the total model domain.
368	!-- Ghost points are excluded because counting values at the ghost boundaries would bias the
369	!-- statistics.
370	rmask = 1.0_wp
371	rmask(:,nxlg:nxl-1,:) = 0.0_wp; rmask(:,nxr+1:nxrg,:) = 0.0_wp
372	rmask(nysg:nys-1,:,:) = 0.0_wp; rmask(nyn+1:nyng,:,:) = 0.0_wp
373	!
374	!-- Following array is required for perturbation pressure within the iterative pressure solvers. For
375	!-- the multistep schemes (Runge-Kutta), array p holds the weighted average of the substeps and
376	!-- cannot be used in the Poisson solver.
377	IF ( psolver == 'sor' ) THEN
378	ALLOCATE( p_loc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
379	ELSEIF ( psolver(1:9) == 'multigrid' ) THEN
380	!
381	!-- For performance reasons, multigrid is using one ghost layer only
382	ALLOCATE( p_loc(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
383	ENDIF
384
385	!
386	!-- Array for storing constant coeffficients of the tridiagonal solver
387	IF ( psolver == 'poisfft' ) THEN
388	ALLOCATE( tri(nxl_z:nxr_z,nys_z:nyn_z,0:nz-1,2) )
389	ALLOCATE( tric(nxl_z:nxr_z,nys_z:nyn_z,0:nz-1) )
390	ENDIF
391
392	IF ( humidity ) THEN
393	!
394	!-- 3D-humidity
395	ALLOCATE( q_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
396	q_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
397	q_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
398	vpt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
399	ENDIF
400
401	IF ( passive_scalar ) THEN
402
403	!
404	!-- 3D scalar arrays
405	ALLOCATE( s_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
406	s_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
407	s_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
408
409	ENDIF
410
411	!
412	!-- Allocate and set 1d-profiles for Stokes drift velocity. It may be set to non-zero values later
413	!-- in ocean_init.
414	ALLOCATE( u_stokes_zu(nzb:nzt+1), u_stokes_zw(nzb:nzt+1), &
415	v_stokes_zu(nzb:nzt+1), v_stokes_zw(nzb:nzt+1) )
416	u_stokes_zu(:) = 0.0_wp
417	u_stokes_zw(:) = 0.0_wp
418	v_stokes_zu(:) = 0.0_wp
419	v_stokes_zw(:) = 0.0_wp
420
421	!
422	!-- Allocation of anelastic and Boussinesq approximation specific arrays
423	ALLOCATE( p_hydrostatic(nzb:nzt+1) )
424	ALLOCATE( rho_air(nzb:nzt+1) )
425	ALLOCATE( rho_air_zw(nzb:nzt+1) )
426	ALLOCATE( drho_air(nzb:nzt+1) )
427	ALLOCATE( drho_air_zw(nzb:nzt+1) )
428	!
429	!-- Density profile calculation for anelastic and Boussinesq approximation.
430	!-- In case of a Boussinesq approximation, a constant density is calculated mainly for output
431	!-- purposes. This density does not need to be considered in the model's system of equations.
432	IF ( TRIM( approximation ) == 'anelastic' ) THEN
433	DO k = nzb, nzt+1
434	p_hydrostatic(k) = barometric_formula(zu(k), pt_surface * &
435	exner_function(surface_pressure * 100.0_wp), &
436	surface_pressure * 100.0_wp)
437
438	rho_air(k) = ideal_gas_law_rho_pt(p_hydrostatic(k), pt_init(k))
439	ENDDO
440
441	DO k = nzb, nzt
442	rho_air_zw(k) = 0.5_wp * ( rho_air(k) + rho_air(k+1) )
443	ENDDO
444
445	rho_air_zw(nzt+1) = rho_air_zw(nzt) + 2.0_wp * ( rho_air(nzt+1) - rho_air_zw(nzt) )
446
447	ELSE
448	DO k = nzb, nzt+1
449	p_hydrostatic(k) = barometric_formula(zu(nzb), pt_surface * &
450	exner_function(surface_pressure * 100.0_wp), &
451	surface_pressure * 100.0_wp)
452
453	rho_air(k) = ideal_gas_law_rho_pt(p_hydrostatic(k), pt_init(nzb))
454	ENDDO
455
456	DO k = nzb, nzt
457	rho_air_zw(k) = 0.5_wp * ( rho_air(k) + rho_air(k+1) )
458	ENDDO
459
460	rho_air_zw(nzt+1) = rho_air_zw(nzt) + 2.0_wp * ( rho_air(nzt+1) - rho_air_zw(nzt) )
461
462	ENDIF
463	!
464	!-- Compute the inverse density array in order to avoid expencive divisions
465	drho_air = 1.0_wp / rho_air
466	drho_air_zw = 1.0_wp / rho_air_zw
467
468	!
469	!-- Allocation of flux conversion arrays
470	ALLOCATE( heatflux_input_conversion(nzb:nzt+1) )
471	ALLOCATE( waterflux_input_conversion(nzb:nzt+1) )
472	ALLOCATE( momentumflux_input_conversion(nzb:nzt+1) )
473	ALLOCATE( heatflux_output_conversion(nzb:nzt+1) )
474	ALLOCATE( waterflux_output_conversion(nzb:nzt+1) )
475	ALLOCATE( momentumflux_output_conversion(nzb:nzt+1) )
476
477	!
478	!-- Calculate flux conversion factors according to approximation and in-/output mode
479	DO k = nzb, nzt+1
480
481	IF ( TRIM( flux_input_mode ) == 'kinematic' ) THEN
482	heatflux_input_conversion(k) = rho_air_zw(k)
483	waterflux_input_conversion(k) = rho_air_zw(k)
484	momentumflux_input_conversion(k) = rho_air_zw(k)
485	ELSEIF ( TRIM( flux_input_mode ) == 'dynamic' ) THEN
486	heatflux_input_conversion(k) = 1.0_wp / c_p
487	waterflux_input_conversion(k) = 1.0_wp / l_v
488	momentumflux_input_conversion(k) = 1.0_wp
489	ENDIF
490
491	IF ( TRIM( flux_output_mode ) == 'kinematic' ) THEN
492	heatflux_output_conversion(k) = drho_air_zw(k)
493	waterflux_output_conversion(k) = drho_air_zw(k)
494	momentumflux_output_conversion(k) = drho_air_zw(k)
495	ELSEIF ( TRIM( flux_output_mode ) == 'dynamic' ) THEN
496	heatflux_output_conversion(k) = c_p
497	waterflux_output_conversion(k) = l_v
498	momentumflux_output_conversion(k) = 1.0_wp
499	ENDIF
500
501	IF ( .NOT. humidity ) THEN
502	waterflux_input_conversion(k) = 1.0_wp
503	waterflux_output_conversion(k) = 1.0_wp
504	ENDIF
505
506	ENDDO
507
508	!
509	!-- In case of multigrid method, compute grid lengths and grid factors for the grid levels with
510	!-- respective density on each grid.
511	IF ( psolver(1:9) == 'multigrid' ) THEN
512
513	ALLOCATE( ddx2_mg(maximum_grid_level) )
514	ALLOCATE( ddy2_mg(maximum_grid_level) )
515	ALLOCATE( dzu_mg(nzb+1:nzt+1,maximum_grid_level) )
516	ALLOCATE( dzw_mg(nzb+1:nzt+1,maximum_grid_level) )
517	ALLOCATE( f1_mg(nzb+1:nzt,maximum_grid_level) )
518	ALLOCATE( f2_mg(nzb+1:nzt,maximum_grid_level) )
519	ALLOCATE( f3_mg(nzb+1:nzt,maximum_grid_level) )
520	ALLOCATE( rho_air_mg(nzb:nzt+1,maximum_grid_level) )
521	ALLOCATE( rho_air_zw_mg(nzb:nzt+1,maximum_grid_level) )
522
523	dzu_mg(:,maximum_grid_level) = dzu
524	rho_air_mg(:,maximum_grid_level) = rho_air
525	!
526	!-- Next line to ensure an equally spaced grid.
527	dzu_mg(1,maximum_grid_level) = dzu(2)
528	rho_air_mg(nzb,maximum_grid_level) = rho_air(nzb) + (rho_air(nzb) - rho_air(nzb+1))
529
530	dzw_mg(:,maximum_grid_level) = dzw
531	rho_air_zw_mg(:,maximum_grid_level) = rho_air_zw
532	nzt_l = nzt
533	DO l = maximum_grid_level-1, 1, -1
534	dzu_mg(nzb+1,l) = 2.0_wp * dzu_mg(nzb+1,l+1)
535	dzw_mg(nzb+1,l) = 2.0_wp * dzw_mg(nzb+1,l+1)
536	rho_air_mg(nzb,l) = rho_air_mg(nzb,l+1) + ( rho_air_mg(nzb,l+1) - &
537	rho_air_mg(nzb+1,l+1) )
538	rho_air_zw_mg(nzb,l) = rho_air_zw_mg(nzb,l+1) + ( rho_air_zw_mg(nzb,l+1) - &
539	rho_air_zw_mg(nzb+1,l+1) )
540	rho_air_mg(nzb+1,l) = rho_air_mg(nzb+1,l+1)
541	rho_air_zw_mg(nzb+1,l) = rho_air_zw_mg(nzb+1,l+1)
542	nzt_l = nzt_l / 2
543	DO k = 2, nzt_l+1
544	dzu_mg(k,l) = dzu_mg(2k-2,l+1) + dzu_mg(2k-1,l+1)
545	dzw_mg(k,l) = dzw_mg(2k-2,l+1) + dzw_mg(2k-1,l+1)
546	rho_air_mg(k,l) = rho_air_mg(2*k-1,l+1)
547	rho_air_zw_mg(k,l) = rho_air_zw_mg(2*k-1,l+1)
548	ENDDO
549	ENDDO
550
551	nzt_l = nzt
552	dx_l = dx
553	dy_l = dy
554	DO l = maximum_grid_level, 1, -1
555	ddx2_mg(l) = 1.0_wp / dx_l**2
556	ddy2_mg(l) = 1.0_wp / dy_l**2
557	DO k = nzb+1, nzt_l
558	f2_mg(k,l) = rho_air_zw_mg(k,l) / ( dzu_mg(k+1,l) * dzw_mg(k,l) )
559	f3_mg(k,l) = rho_air_zw_mg(k-1,l) / ( dzu_mg(k,l) * dzw_mg(k,l) )
560	f1_mg(k,l) = 2.0_wp * ( ddx2_mg(l) + ddy2_mg(l) ) &
561	* rho_air_mg(k,l) + f2_mg(k,l) + f3_mg(k,l)
562	ENDDO
563	nzt_l = nzt_l / 2
564	dx_l = dx_l * 2.0_wp
565	dy_l = dy_l * 2.0_wp
566	ENDDO
567
568	ENDIF
569
570	!
571	!-- 1D-array for large scale subsidence velocity
572	IF ( .NOT. ALLOCATED( w_subs ) ) THEN
573	ALLOCATE ( w_subs(nzb:nzt+1) )
574	w_subs = 0.0_wp
575	ENDIF
576
577	!
578	!-- Initial assignment of the pointers
579	IF ( .NOT. neutral ) THEN
580	pt => pt_1; pt_p => pt_2; tpt_m => pt_3
581	ELSE
582	pt => pt_1; pt_p => pt_1; tpt_m => pt_3
583	ENDIF
584	u => u_1; u_p => u_2; tu_m => u_3
585	v => v_1; v_p => v_2; tv_m => v_3
586	w => w_1; w_p => w_2; tw_m => w_3
587
588	IF ( humidity ) THEN
589	q => q_1; q_p => q_2; tq_m => q_3
590	vpt => vpt_1
591	ENDIF
592
593	IF ( passive_scalar ) THEN
594	s => s_1; s_p => s_2; ts_m => s_3
595	ENDIF
596
597	!
598	!-- Initialize surface arrays
599	CALL init_surface_arrays
600	!
601	!-- Allocate arrays for other modules
602	CALL module_interface_init_arrays
603
604
605	!
606	!-- Allocate arrays containing the RK coefficient for calculation of perturbation pressure and
607	!-- turbulent fluxes. At this point values are set for pressure calculation during initialization
608	!-- (where no timestep is done). Further below the values needed within the timestep scheme will be
609	!-- set.
610	ALLOCATE( weight_substep(1:intermediate_timestep_count_max), &
611	weight_pres(1:intermediate_timestep_count_max) )
612	weight_substep = 1.0_wp
613	weight_pres = 1.0_wp
614	intermediate_timestep_count = 0 ! needed when simulated_time = 0.0
615
616	IF ( debug_output ) CALL debug_message( 'allocating arrays', 'end' )
617
618	!
619	!-- Initialize time series
620	ts_value = 0.0_wp
621
622	!
623	!-- Initialize local summation arrays for routine flow_statistics.
624	!-- This is necessary because they may not yet have been initialized when they are called from
625	!-- flow_statistics (or - depending on the chosen model run - are never initialized)
626	sums_divnew_l = 0.0_wp
627	sums_divold_l = 0.0_wp
628	sums_l_l = 0.0_wp
629	sums_wsts_bc_l = 0.0_wp
630
631	!
632	!-- Initialize model variables
633	IF ( TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
634	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
635	!
636	!-- Initialization with provided input data derived from larger-scale model
637	IF ( INDEX( initializing_actions, 'inifor' ) /= 0 ) THEN
638	IF ( debug_output ) CALL debug_message( 'initializing with INIFOR', 'start' )
639	!
640	!-- Read initial 1D profiles or 3D data from NetCDF file, depending on the provided
641	!-- level-of-detail.
642	!-- At the moment, only u, v, w, pt and q are provided.
643	CALL netcdf_data_input_init_3d
644	!
645	!-- Please note, Inifor provides data from nzb+1 to nzt.
646	!-- Bottom and top boundary conditions for Inifor profiles are already set (just after
647	!-- reading), so that this is not necessary here.
648	!-- Depending on the provided level-of-detail, initial Inifor data is either stored on data
649	!-- type (lod=1), or directly on 3D arrays (lod=2).
650	!-- In order to obtain also initial profiles in case of lod=2 (which is required for e.g.
651	!-- damping), average over 3D data.
652	IF( init_3d%lod_u == 1 ) THEN
653	u_init = init_3d%u_init
654	ELSEIF( init_3d%lod_u == 2 ) THEN
655	ALLOCATE( init_l(nzb:nzt+1) )
656	DO k = nzb, nzt+1
657	init_l(k) = SUM( u(k,nys:nyn,nxl:nxr) )
658	ENDDO
659	init_l = init_l / REAL( ( nx + 1 ) * ( ny + 1 ), KIND = wp )
660
661	#if defined( __parallel )
662	CALL MPI_ALLREDUCE( init_l, u_init, nzt+1-nzb+1, MPI_REAL, MPI_SUM, comm2d, ierr )
663	#else
664	u_init = init_l
665	#endif
666	DEALLOCATE( init_l )
667
668	ENDIF
669
670	IF( init_3d%lod_v == 1 ) THEN
671	v_init = init_3d%v_init
672	ELSEIF( init_3d%lod_v == 2 ) THEN
673	ALLOCATE( init_l(nzb:nzt+1) )
674	DO k = nzb, nzt+1
675	init_l(k) = SUM( v(k,nys:nyn,nxl:nxr) )
676	ENDDO
677	init_l = init_l / REAL( ( nx + 1 ) * ( ny + 1 ), KIND = wp )
678
679	#if defined( __parallel )
680	CALL MPI_ALLREDUCE( init_l, v_init, nzt+1-nzb+1, MPI_REAL, MPI_SUM, comm2d, ierr )
681	#else
682	v_init = init_l
683	#endif
684	DEALLOCATE( init_l )
685	ENDIF
686	IF( .NOT. neutral ) THEN
687	IF( init_3d%lod_pt == 1 ) THEN
688	pt_init = init_3d%pt_init
689	ELSEIF( init_3d%lod_pt == 2 ) THEN
690	ALLOCATE( init_l(nzb:nzt+1) )
691	DO k = nzb, nzt+1
692	init_l(k) = SUM( pt(k,nys:nyn,nxl:nxr) )
693	ENDDO
694	init_l = init_l / REAL( ( nx + 1 ) * ( ny + 1 ), KIND = wp )
695
696	#if defined( __parallel )
697	CALL MPI_ALLREDUCE( init_l, pt_init, nzt+1-nzb+1, MPI_REAL, MPI_SUM, comm2d, ierr )
698	#else
699	pt_init = init_l
700	#endif
701	DEALLOCATE( init_l )
702	ENDIF
703	ENDIF
704
705
706	IF( humidity ) THEN
707	IF( init_3d%lod_q == 1 ) THEN
708	q_init = init_3d%q_init
709	ELSEIF( init_3d%lod_q == 2 ) THEN
710	ALLOCATE( init_l(nzb:nzt+1) )
711	DO k = nzb, nzt+1
712	init_l(k) = SUM( q(k,nys:nyn,nxl:nxr) )
713	ENDDO
714	init_l = init_l / REAL( ( nx + 1 ) * ( ny + 1 ), KIND = wp )
715
716	#if defined( __parallel )
717	CALL MPI_ALLREDUCE( init_l, q_init, nzt+1-nzb+1, MPI_REAL, MPI_SUM, comm2d, ierr )
718	#else
719	q_init = init_l
720	#endif
721	DEALLOCATE( init_l )
722	ENDIF
723	ENDIF
724
725	!
726	!-- Write initial profiles onto 3D arrays.
727	!-- Work-around, 3D initialization of u,v,w creates artificial structures which correlate with
728	!-- the processor grid. The reason for this is still unknown. To work-around this, 3D
729	!-- initialization will be effectively reduce to a 1D initialization where no such artificial
730	!-- structures appear.
731	DO i = nxlg, nxrg
732	DO j = nysg, nyng
733	IF( init_3d%lod_u == 1 .OR. init_3d%lod_u == 2 ) u(:,j,i) = u_init(:)
734	IF( init_3d%lod_v == 1 .OR. init_3d%lod_u == 2 ) v(:,j,i) = v_init(:)
735	IF( .NOT. neutral .AND. ( init_3d%lod_pt == 1 .OR. init_3d%lod_pt == 2 ) ) &
736	pt(:,j,i) = pt_init(:)
737	IF( humidity .AND. ( init_3d%lod_q == 1 .OR. init_3d%lod_q == 2 ) ) &
738	q(:,j,i) = q_init(:)
739	ENDDO
740	ENDDO
741	!
742	!-- Set geostrophic wind components.
743	IF ( init_3d%from_file_ug ) THEN
744	ug(:) = init_3d%ug_init(:)
745	ENDIF
746	IF ( init_3d%from_file_vg ) THEN
747	vg(:) = init_3d%vg_init(:)
748	ENDIF
749	!
750	!-- Set bottom and top boundary condition for geostrophic wind
751	ug(nzt+1) = ug(nzt)
752	vg(nzt+1) = vg(nzt)
753	ug(nzb) = ug(nzb+1)
754	vg(nzb) = vg(nzb+1)
755	!
756	!-- Set inital w to 0
757	w = 0.0_wp
758
759	IF ( passive_scalar ) THEN
760	DO i = nxlg, nxrg
761	DO j = nysg, nyng
762	s(:,j,i) = s_init
763	ENDDO
764	ENDDO
765	ENDIF
766
767	!
768	!-- Set velocity components at non-atmospheric / oceanic grid points to zero.
769	u = MERGE( u, 0.0_wp, BTEST( wall_flags_total_0, 1 ) )
770	v = MERGE( v, 0.0_wp, BTEST( wall_flags_total_0, 2 ) )
771	w = MERGE( w, 0.0_wp, BTEST( wall_flags_total_0, 3 ) )
772	!
773	!-- Initialize surface variables, e.g. friction velocity, momentum fluxes, etc.
774	CALL init_surfaces
775
776	IF ( debug_output ) CALL debug_message( 'initializing with INIFOR', 'end' )
777	!
778	!-- Initialization via computed 1D-model profiles
779	ELSEIF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
780
781	IF ( debug_output ) CALL debug_message( 'initializing with 1D model profiles', 'start' )
782	!
783	!-- Use solutions of the 1D model as initial profiles,
784	!-- start 1D model
785	CALL init_1d_model
786	!
787	!-- Transfer initial profiles to the arrays of the 3D model
788	DO i = nxlg, nxrg
789	DO j = nysg, nyng
790	pt(:,j,i) = pt_init
791	u(:,j,i) = u1d
792	v(:,j,i) = v1d
793	ENDDO
794	ENDDO
795
796	IF ( humidity ) THEN
797	DO i = nxlg, nxrg
798	DO j = nysg, nyng
799	q(:,j,i) = q_init
800	ENDDO
801	ENDDO
802	ENDIF
803
804	IF ( passive_scalar ) THEN
805	DO i = nxlg, nxrg
806	DO j = nysg, nyng
807	s(:,j,i) = s_init
808	ENDDO
809	ENDDO
810	ENDIF
811	!
812	!-- Store initial profiles for output purposes etc.
813	IF ( .NOT. constant_diffusion ) THEN
814	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
815	ENDIF
816	!
817	!-- Set velocities back to zero
818	u = MERGE( u, 0.0_wp, BTEST( wall_flags_total_0, 1 ) )
819	v = MERGE( v, 0.0_wp, BTEST( wall_flags_total_0, 2 ) )
820	!
821	!-- WARNING: The extra boundary conditions set after running the 1D model impose an error on
822	!-- -------- the divergence one layer below the topography; need to correct later
823	!-- ATTENTION: Provisional correction for Piacsek & Williams advection scheme: keep u and v
824	!-- ---------- zero one layer below the topography.
825	IF ( ibc_uv_b == 1 ) THEN
826	!
827	!-- Neumann condition
828	DO i = nxl-1, nxr+1
829	DO j = nys-1, nyn+1
830	u(nzb,j,i) = u(nzb+1,j,i)
831	v(nzb,j,i) = v(nzb+1,j,i)
832	ENDDO
833	ENDDO
834
835	ENDIF
836	!
837	!-- Initialize surface variables, e.g. friction velocity, momentum fluxes, etc.
838	CALL init_surfaces
839
840	IF ( debug_output ) CALL debug_message( 'initializing with 1D model profiles', 'end' )
841
842	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) THEN
843
844	IF ( debug_output ) CALL debug_message( 'initializing with constant profiles', 'start' )
845
846	!
847	!-- Use constructed initial profiles (velocity constant with height, temperature profile with
848	!-- constant gradient)
849	DO i = nxlg, nxrg
850	DO j = nysg, nyng
851	pt(:,j,i) = pt_init
852	u(:,j,i) = u_init
853	v(:,j,i) = v_init
854	ENDDO
855	ENDDO
856	!
857	!-- Mask topography
858	u = MERGE( u, 0.0_wp, BTEST( wall_flags_total_0, 1 ) )
859	v = MERGE( v, 0.0_wp, BTEST( wall_flags_total_0, 2 ) )
860	!
861	!-- Set initial horizontal velocities at the lowest computational grid levels to zero in order
862	!-- to avoid too small time steps caused by the diffusion limit in the initial phase of a run
863	!-- (at k=1, dz/2 occurs in the limiting formula!).
864	!-- Please note, in case land- or urban-surface model is used and a spinup is applied, masking
865	!-- the lowest computational level is not possible as MOST as well as energy-balance
866	!-- parametrizations will not work with zero wind velocity.
867	IF ( ibc_uv_b /= 1 .AND. .NOT. spinup ) THEN
868	DO i = nxlg, nxrg
869	DO j = nysg, nyng
870	DO k = nzb, nzt
871	u(k,j,i) = MERGE( u(k,j,i), 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 20 ) )
872	v(k,j,i) = MERGE( v(k,j,i), 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 21 ) )
873	ENDDO
874	ENDDO
875	ENDDO
876	ENDIF
877
878	IF ( humidity ) THEN
879	DO i = nxlg, nxrg
880	DO j = nysg, nyng
881	q(:,j,i) = q_init
882	ENDDO
883	ENDDO
884	ENDIF
885
886	IF ( passive_scalar ) THEN
887	DO i = nxlg, nxrg
888	DO j = nysg, nyng
889	s(:,j,i) = s_init
890	ENDDO
891	ENDDO
892	ENDIF
893
894	!
895	!-- Compute initial temperature field and other constants used in case of a sloping surface.
896	IF ( sloping_surface ) CALL init_slope
897	!
898	!-- Initialize surface variables, e.g. friction velocity, momentum fluxes, etc.
899	CALL init_surfaces
900
901	IF ( debug_output ) CALL debug_message( 'initializing with constant profiles', 'end' )
902
903	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) THEN
904
905	IF ( debug_output ) CALL debug_message( 'initializing by user', 'start' )
906	!
907	!-- Pre-initialize surface variables, i.e. setting start- and end-indices at each
908	!-- (j,i)-location. Please note, this does not supersede user-defined initialization of
909	!-- surface quantities.
910	CALL init_surfaces
911	!
912	!-- Initialization will completely be done by the user
913	CALL user_init_3d_model
914
915	IF ( debug_output ) CALL debug_message( 'initializing by user', 'end' )
916
917	ENDIF
918
919	IF ( debug_output ) THEN
920	CALL debug_message( 'initializing statistics, boundary conditions, etc.', 'start' )
921	ENDIF
922
923	!
924	!-- Bottom boundary
925	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2 ) THEN
926	u(nzb,:,:) = 0.0_wp
927	v(nzb,:,:) = 0.0_wp
928	ENDIF
929
930	!
931	!-- Apply channel flow boundary condition
932	IF ( TRIM( bc_uv_t ) == 'dirichlet_0' ) THEN
933	u(nzt+1,:,:) = 0.0_wp
934	v(nzt+1,:,:) = 0.0_wp
935	ENDIF
936
937	!
938	!-- Calculate virtual potential temperature
939	IF ( humidity ) vpt = pt * ( 1.0_wp + 0.61_wp * q )
940
941	!
942	!-- Store initial profiles for output purposes etc.. Please note, in case of initialization of u,
943	!-- v, w, pt, and q via output data derived from larger scale models, data will not be
944	!-- horizontally homogeneous. Actually, a mean profile should be calculated before.
945	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
946	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
947	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2) THEN
948	hom(nzb,1,5,:) = 0.0_wp
949	hom(nzb,1,6,:) = 0.0_wp
950	ENDIF
951	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
952
953	IF ( humidity ) THEN
954	!
955	!-- Store initial profile of total water content, virtual potential temperature
956	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
957	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
958	!
959	!-- Store initial profile of mixing ratio and potential temperature
960	IF ( bulk_cloud_model .OR. cloud_droplets ) THEN
961	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
962	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
963	ENDIF
964	ENDIF
965
966	!
967	!-- Store initial scalar profile
968	IF ( passive_scalar ) THEN
969	hom(:,1,121,:) = SPREAD( s(:,nys,nxl), 2, statistic_regions+1 )
970	ENDIF
971
972	!
973	!-- Initialize the random number generators (from numerical recipes)
974	CALL random_function_ini
975
976	IF ( random_generator == 'random-parallel' ) THEN
977	CALL init_parallel_random_generator( nx, nys, nyn, nxl, nxr )
978	ENDIF
979	!
980	!-- Set the reference state to be used in the buoyancy terms (for ocean runs the reference state
981	!-- will be set (overwritten) in init_ocean).
982	IF ( use_single_reference_value ) THEN
983	IF ( .NOT. humidity ) THEN
984	ref_state(:) = pt_reference
985	ELSE
986	ref_state(:) = vpt_reference
987	ENDIF
988	ELSE
989	IF ( .NOT. humidity ) THEN
990	ref_state(:) = pt_init(:)
991	ELSE
992	ref_state(:) = vpt(:,nys,nxl)
993	ENDIF
994	ENDIF
995
996	!
997	!-- For the moment, vertical velocity is zero
998	w = 0.0_wp
999
1000	!
1001	!-- Initialize array sums (must be defined in first call of pres)
1002	sums = 0.0_wp
1003
1004	!
1005	!-- In case of iterative solvers, p must get an initial value
1006	IF ( psolver(1:9) == 'multigrid' .OR. psolver == 'sor' ) p = 0.0_wp
1007	!
1008	!-- Impose vortex with vertical axis on the initial velocity profile
1009	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
1010	CALL init_rankine
1011	ENDIF
1012
1013	!
1014	!-- Impose temperature anomaly (advection test only) or warm air bubble close to surface.
1015	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 .OR. &
1016	INDEX( initializing_actions, 'initialize_bubble' ) /= 0 ) THEN
1017	CALL init_pt_anomaly
1018	ENDIF
1019
1020	!
1021	!-- If required, change the surface temperature at the start of the 3D run
1022	IF ( pt_surface_initial_change /= 0.0_wp ) THEN
1023	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
1024	ENDIF
1025
1026	!
1027	!-- If required, change the surface humidity/scalar at the start of the 3D
1028	!-- run
1029	IF ( humidity .AND. q_surface_initial_change /= 0.0_wp ) &
1030	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
1031
1032	IF ( passive_scalar .AND. s_surface_initial_change /= 0.0_wp ) &
1033	s(nzb,:,:) = s(nzb,:,:) + s_surface_initial_change
1034
1035
1036	!
1037	!-- Initialize old and new time levels.
1038	tpt_m = 0.0_wp; tu_m = 0.0_wp; tv_m = 0.0_wp; tw_m = 0.0_wp
1039	pt_p = pt; u_p = u; v_p = v; w_p = w
1040
1041	IF ( humidity ) THEN
1042	tq_m = 0.0_wp
1043	q_p = q
1044	ENDIF
1045
1046	IF ( passive_scalar ) THEN
1047	ts_m = 0.0_wp
1048	s_p = s
1049	ENDIF
1050
1051	IF ( debug_output ) THEN
1052	CALL debug_message( 'initializing statistics, boundary conditions, etc.', 'end' )
1053	ENDIF
1054
1055	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' .OR. &
1056	TRIM( initializing_actions ) == 'cyclic_fill' ) &
1057	THEN
1058
1059	IF ( debug_output ) THEN
1060	CALL debug_message( 'initializing in case of restart / cyclic_fill', 'start' )
1061	ENDIF
1062	!
1063	!-- Initialize surface elements and its attributes, e.g. heat- and momentumfluxes, roughness,
1064	!-- scaling parameters. As number of surface elements might be different between runs, e.g. in
1065	!-- case of cyclic fill, and not all surface elements are read, surface elements need to be
1066	!-- initialized before.
1067	!-- Please note, in case of cyclic fill, surfaces should be initialized after restart data is
1068	!-- read, else, individual settings of surface parameters will be overwritten from data of
1069	!-- precursor run, hence, init_surfaces is called a second time after reading the restart data.
1070	CALL init_surfaces
1071	!
1072	!-- When reading data for cyclic fill of 3D prerun data files, read some of the global variables
1073	!-- from the restart file which are required for initializing the inflow
1074	IF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1075
1076	!
1077	!-- Blockwise I/O does not work together with MPI-I/O
1078	IF ( restart_data_format_input(1:3) == 'mpi' ) THEN
1079	CALL rrd_read_parts_of_global
1080	ELSE
1081	DO i = 0, io_blocks-1
1082	IF ( i == io_group ) THEN
1083	CALL rrd_read_parts_of_global
1084	ENDIF
1085	#if defined( __parallel )
1086	CALL MPI_BARRIER( comm2d, ierr )
1087	#endif
1088	ENDDO
1089	ENDIF
1090
1091	ENDIF
1092
1093	!
1094	!-- Read processor specific binary data from restart file.
1095	!-- Blockwise I/O does not work together with MPI-I/O
1096	IF ( restart_data_format_input(1:3) == 'mpi' ) THEN
1097	CALL rrd_local
1098	ELSE
1099	DO i = 0, io_blocks-1
1100	IF ( i == io_group ) THEN
1101	CALL rrd_local
1102	ENDIF
1103	#if defined( __parallel )
1104	CALL MPI_BARRIER( comm2d, ierr )
1105	#endif
1106	ENDDO
1107	ENDIF
1108
1109
1110	IF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1111
1112	!
1113	!-- In case of cyclic fill, call init_surfaces a second time, so that surface properties such
1114	!-- as heat fluxes are initialized as prescribed.
1115	CALL init_surfaces
1116
1117	!
1118	!-- Overwrite u_init, v_init, pt_init, q_init and s_init with the horizontally mean (hom)
1119	!-- vertical profiles from the end of the prerun, because these profiles shall be used as the
1120	!-- reference state for the rayleigh damping and the pt_damping. This is especially important
1121	!-- for the use of large_scale_subsidence, because the reference temperature in the free
1122	!-- atmosphere changes in time.
1123	u_init(:) = hom_sum(:,1,0)
1124	v_init(:) = hom_sum(:,2,0)
1125	pt_init(:) = hom_sum(:,4,0)
1126	IF ( humidity ) q_init(:) = hom_sum(:,41,0)
1127	IF ( passive_scalar ) s_init(:) = hom_sum(:,115,0)
1128	ENDIF
1129	!
1130	!-- In case of complex terrain and cyclic fill method as initialization, shift initial data in
1131	!-- the vertical direction for each point in the x-y-plane depending on local surface height.
1132	IF ( complex_terrain .AND. TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1133	DO i = nxlg, nxrg
1134	DO j = nysg, nyng
1135	nz_u_shift = topo_top_ind(j,i,1)
1136	nz_v_shift = topo_top_ind(j,i,2)
1137	nz_w_shift = topo_top_ind(j,i,3)
1138	nz_s_shift = topo_top_ind(j,i,0)
1139
1140	u(nz_u_shift:nzt+1,j,i) = u(0:nzt+1-nz_u_shift,j,i)
1141
1142	v(nz_v_shift:nzt+1,j,i) = v(0:nzt+1-nz_v_shift,j,i)
1143
1144	w(nz_w_shift:nzt+1,j,i) = w(0:nzt+1-nz_w_shift,j,i)
1145
1146	p(nz_s_shift:nzt+1,j,i) = p(0:nzt+1-nz_s_shift,j,i)
1147	pt(nz_s_shift:nzt+1,j,i) = pt(0:nzt+1-nz_s_shift,j,i)
1148	ENDDO
1149	ENDDO
1150	ENDIF
1151	!
1152	!-- Initialization of the turbulence recycling method
1153	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. turbulent_inflow ) THEN
1154	!
1155	!-- First store the profiles to be used at the inflow.
1156	!-- These profiles are the (temporally) and horizontally averaged vertical profiles from the
1157	!-- prerun. Alternatively, prescribed profiles for u,v-components can be used.
1158	ALLOCATE( mean_inflow_profiles(nzb:nzt+1,1:num_mean_inflow_profiles) )
1159
1160	IF ( use_prescribed_profile_data ) THEN
1161	mean_inflow_profiles(:,1) = u_init ! u
1162	mean_inflow_profiles(:,2) = v_init ! v
1163	ELSE
1164	mean_inflow_profiles(:,1) = hom_sum(:,1,0) ! u
1165	mean_inflow_profiles(:,2) = hom_sum(:,2,0) ! v
1166	ENDIF
1167	mean_inflow_profiles(:,4) = hom_sum(:,4,0) ! pt
1168	IF ( humidity ) mean_inflow_profiles(:,6) = hom_sum(:,41,0) ! q
1169	IF ( passive_scalar ) mean_inflow_profiles(:,7) = hom_sum(:,115,0) ! s
1170
1171	!
1172	!-- In case of complex terrain, determine vertical displacement at inflow boundary and adjust
1173	!-- mean inflow profiles
1174	IF ( complex_terrain ) THEN
1175	IF ( nxlg <= 0 .AND. nxrg >= 0 .AND. nysg <= 0 .AND. nyng >= 0 ) THEN
1176	nz_u_shift_l = topo_top_ind(j,i,1)
1177	nz_v_shift_l = topo_top_ind(j,i,2)
1178	nz_w_shift_l = topo_top_ind(j,i,3)
1179	nz_s_shift_l = topo_top_ind(j,i,0)
1180	ELSE
1181	nz_u_shift_l = 0
1182	nz_v_shift_l = 0
1183	nz_w_shift_l = 0
1184	nz_s_shift_l = 0
1185	ENDIF
1186
1187	#if defined( __parallel )
1188	CALL MPI_ALLREDUCE( nz_u_shift_l, nz_u_shift, 1, MPI_INTEGER, MPI_MAX, comm2d, ierr )
1189	CALL MPI_ALLREDUCE( nz_v_shift_l, nz_v_shift, 1, MPI_INTEGER, MPI_MAX, comm2d, ierr )
1190	CALL MPI_ALLREDUCE( nz_w_shift_l, nz_w_shift, 1, MPI_INTEGER, MPI_MAX, comm2d, ierr )
1191	CALL MPI_ALLREDUCE( nz_s_shift_l, nz_s_shift, 1, MPI_INTEGER, MPI_MAX, comm2d, ierr )
1192	#else
1193	nz_u_shift = nz_u_shift_l
1194	nz_v_shift = nz_v_shift_l
1195	nz_w_shift = nz_w_shift_l
1196	nz_s_shift = nz_s_shift_l
1197	#endif
1198
1199	mean_inflow_profiles(:,1) = 0.0_wp
1200	mean_inflow_profiles(nz_u_shift:nzt+1,1) = hom_sum(0:nzt+1-nz_u_shift,1,0) ! u
1201
1202	mean_inflow_profiles(:,2) = 0.0_wp
1203	mean_inflow_profiles(nz_v_shift:nzt+1,2) = hom_sum(0:nzt+1-nz_v_shift,2,0) ! v
1204
1205	mean_inflow_profiles(nz_s_shift:nzt+1,4) = hom_sum(0:nzt+1-nz_s_shift,4,0) ! pt
1206
1207	ENDIF
1208
1209	!
1210	!-- If necessary, adjust the horizontal flow field to the prescribed profiles
1211	IF ( use_prescribed_profile_data ) THEN
1212	DO i = nxlg, nxrg
1213	DO j = nysg, nyng
1214	DO k = nzb, nzt+1
1215	u(k,j,i) = u(k,j,i) - hom_sum(k,1,0) + u_init(k)
1216	v(k,j,i) = v(k,j,i) - hom_sum(k,2,0) + v_init(k)
1217	ENDDO
1218	ENDDO
1219	ENDDO
1220	ENDIF
1221
1222	!
1223	!-- Use these mean profiles at the inflow (provided that Dirichlet conditions are used)
1224	IF ( bc_dirichlet_l ) THEN
1225	DO j = nysg, nyng
1226	DO k = nzb, nzt+1
1227	u(k,j,nxlg:-1) = mean_inflow_profiles(k,1)
1228	v(k,j,nxlg:-1) = mean_inflow_profiles(k,2)
1229	w(k,j,nxlg:-1) = 0.0_wp
1230	pt(k,j,nxlg:-1) = mean_inflow_profiles(k,4)
1231	IF ( humidity ) q(k,j,nxlg:-1) = mean_inflow_profiles(k,6)
1232	IF ( passive_scalar ) s(k,j,nxlg:-1) = mean_inflow_profiles(k,7)
1233	ENDDO
1234	ENDDO
1235	ENDIF
1236
1237	!
1238	!-- Calculate the damping factors to be used at the inflow. For a turbulent inflow the
1239	!-- turbulent fluctuations have to be limited vertically because otherwise the turbulent
1240	!-- inflow layer will grow in time.
1241	IF ( inflow_damping_height == 9999999.9_wp ) THEN
1242	!
1243	!-- Default: use the inversion height calculated by the prerun; if this is zero,
1244	!-- inflow_damping_height must be explicitly specified.
1245	IF ( hom_sum(nzb+6,pr_palm,0) /= 0.0_wp ) THEN
1246	inflow_damping_height = hom_sum(nzb+6,pr_palm,0)
1247	ELSE
1248	WRITE( message_string, * ) 'inflow_damping_height must be ', &
1249	'explicitly specified because&the inversion height ', &
1250	'calculated by the prerun is zero.'
1251	CALL message( 'init_3d_model', 'PA0318', 1, 2, 0, 6, 0 )
1252	ENDIF
1253
1254	ENDIF
1255
1256	IF ( inflow_damping_width == 9999999.9_wp ) THEN
1257	!
1258	!-- Default for the transition range: one tenth of the undamped layer
1259	inflow_damping_width = 0.1_wp * inflow_damping_height
1260
1261	ENDIF
1262
1263	ALLOCATE( inflow_damping_factor(nzb:nzt+1) )
1264
1265	DO k = nzb, nzt+1
1266
1267	IF ( zu(k) <= inflow_damping_height ) THEN
1268	inflow_damping_factor(k) = 1.0_wp
1269	ELSEIF ( zu(k) <= ( inflow_damping_height + inflow_damping_width ) ) THEN
1270	inflow_damping_factor(k) = 1.0_wp - &
1271	( zu(k) - inflow_damping_height ) / inflow_damping_width
1272	ELSE
1273	inflow_damping_factor(k) = 0.0_wp
1274	ENDIF
1275
1276	ENDDO
1277
1278	ENDIF
1279
1280	!
1281	!-- Inside buildings set velocities back to zero
1282	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. topography /= 'flat' ) THEN
1283	!
1284	!-- Inside buildings set velocities back to zero.
1285	!-- Other scalars (pt, q, s, p, sa, ...) are ignored at present,
1286	!-- maybe revise later.
1287	DO i = nxlg, nxrg
1288	DO j = nysg, nyng
1289	DO k = nzb, nzt
1290	u(k,j,i) = MERGE( u(k,j,i), 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 1 ) )
1291	v(k,j,i) = MERGE( v(k,j,i), 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 2 ) )
1292	w(k,j,i) = MERGE( w(k,j,i), 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 3 ) )
1293	ENDDO
1294	ENDDO
1295	ENDDO
1296
1297	ENDIF
1298
1299	!
1300	!-- Calculate initial temperature field and other constants used in case of a sloping surface
1301	IF ( sloping_surface ) CALL init_slope
1302
1303	!
1304	!-- Initialize new time levels (only done in order to set boundary values including ghost points)
1305	pt_p = pt; u_p = u; v_p = v; w_p = w
1306	IF ( humidity ) THEN
1307	q_p = q
1308	ENDIF
1309	IF ( passive_scalar ) s_p = s
1310	!
1311	!-- Allthough tendency arrays are set in prognostic_equations, they have have to be predefined
1312	!-- here because they are used (but multiplied with 0) there before they are set.
1313	tpt_m = 0.0_wp; tu_m = 0.0_wp; tv_m = 0.0_wp; tw_m = 0.0_wp
1314	IF ( humidity ) THEN
1315	tq_m = 0.0_wp
1316	ENDIF
1317	IF ( passive_scalar ) ts_m = 0.0_wp
1318
1319	IF ( debug_output ) THEN
1320	CALL debug_message( 'initializing in case of restart / cyclic_fill', 'end' )
1321	ENDIF
1322
1323	ELSE
1324	!
1325	!-- Actually this part of the programm should not be reached
1326	message_string = 'unknown initializing problem'
1327	CALL message( 'init_3d_model', 'PA0193', 1, 2, 0, 6, 0 )
1328	ENDIF
1329
1330	!
1331	!-- Calculate the initial volume flow at the right and north boundary
1332	IF ( conserve_volume_flow ) THEN
1333
1334	IF ( use_prescribed_profile_data ) THEN
1335
1336	volume_flow_initial_l = 0.0_wp
1337	volume_flow_area_l = 0.0_wp
1338
1339	IF ( nxr == nx ) THEN
1340	DO j = nys, nyn
1341	DO k = nzb+1, nzt
1342	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1343	u_init(k) * dzw(k) &
1344	* MERGE( 1.0_wp, 0.0_wp, &
1345	BTEST( wall_flags_total_0(k,j,nxr), 1 ) &
1346	)
1347
1348	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k) &
1349	* MERGE( 1.0_wp, 0.0_wp, &
1350	BTEST( wall_flags_total_0(k,j,nxr), 1 ) &
1351	)
1352	ENDDO
1353	ENDDO
1354	ENDIF
1355
1356	IF ( nyn == ny ) THEN
1357	DO i = nxl, nxr
1358	DO k = nzb+1, nzt
1359	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1360	v_init(k) * dzw(k) &
1361	* MERGE( 1.0_wp, 0.0_wp, &
1362	BTEST( wall_flags_total_0(k,nyn,i), 2 ) &
1363	)
1364	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k) &
1365	* MERGE( 1.0_wp, 0.0_wp, &
1366	BTEST( wall_flags_total_0(k,nyn,i), 2 ) &
1367	)
1368	ENDDO
1369	ENDDO
1370	ENDIF
1371
1372	#if defined( __parallel )
1373	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1), 2, MPI_REAL, &
1374	MPI_SUM, comm2d, ierr )
1375	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), 2, MPI_REAL, MPI_SUM, &
1376	comm2d, ierr )
1377
1378	#else
1379	volume_flow_initial = volume_flow_initial_l
1380	volume_flow_area = volume_flow_area_l
1381	#endif
1382
1383	ELSEIF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1384
1385	volume_flow_initial_l = 0.0_wp
1386	volume_flow_area_l = 0.0_wp
1387
1388	IF ( nxr == nx ) THEN
1389	DO j = nys, nyn
1390	DO k = nzb+1, nzt
1391	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1392	hom_sum(k,1,0) * dzw(k) &
1393	* MERGE( 1.0_wp, 0.0_wp, &
1394	BTEST( wall_flags_total_0(k,j,nx), 1 ) &
1395	)
1396	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k) &
1397	* MERGE( 1.0_wp, 0.0_wp, &
1398	BTEST( wall_flags_total_0(k,j,nx), 1 ) &
1399	)
1400	ENDDO
1401	ENDDO
1402	ENDIF
1403
1404	IF ( nyn == ny ) THEN
1405	DO i = nxl, nxr
1406	DO k = nzb+1, nzt
1407	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1408	hom_sum(k,2,0) * dzw(k) &
1409	* MERGE( 1.0_wp, 0.0_wp, &
1410	BTEST( wall_flags_total_0(k,ny,i), 2 ) &
1411	)
1412	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k) &
1413	* MERGE( 1.0_wp, 0.0_wp, &
1414	BTEST( wall_flags_total_0(k,ny,i), 2 ) &
1415	)
1416	ENDDO
1417	ENDDO
1418	ENDIF
1419
1420	#if defined( __parallel )
1421	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1), 2, MPI_REAL, &
1422	MPI_SUM, comm2d, ierr )
1423	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), 2, MPI_REAL, MPI_SUM, &
1424	comm2d, ierr )
1425
1426	#else
1427	volume_flow_initial = volume_flow_initial_l
1428	volume_flow_area = volume_flow_area_l
1429	#endif
1430
1431	ELSEIF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1432
1433	volume_flow_initial_l = 0.0_wp
1434	volume_flow_area_l = 0.0_wp
1435
1436	IF ( nxr == nx ) THEN
1437	DO j = nys, nyn
1438	DO k = nzb+1, nzt
1439	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1440	u(k,j,nx) * dzw(k) &
1441	* MERGE( 1.0_wp, 0.0_wp, &
1442	BTEST( wall_flags_total_0(k,j,nx), 1 ) &
1443	)
1444	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k) &
1445	* MERGE( 1.0_wp, 0.0_wp, &
1446	BTEST( wall_flags_total_0(k,j,nx), 1 ) &
1447	)
1448	ENDDO
1449	ENDDO
1450	ENDIF
1451
1452	IF ( nyn == ny ) THEN
1453	DO i = nxl, nxr
1454	DO k = nzb+1, nzt
1455	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1456	v(k,ny,i) * dzw(k) &
1457	* MERGE( 1.0_wp, 0.0_wp, &
1458	BTEST( wall_flags_total_0(k,ny,i), 2 ) &
1459	)
1460	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k) &
1461	* MERGE( 1.0_wp, 0.0_wp, &
1462	BTEST( wall_flags_total_0(k,ny,i), 2 ) &
1463	)
1464	ENDDO
1465	ENDDO
1466	ENDIF
1467
1468	#if defined( __parallel )
1469	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1), 2, MPI_REAL, &
1470	MPI_SUM, comm2d, ierr )
1471	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), 2, MPI_REAL, MPI_SUM, &
1472	comm2d, ierr )
1473
1474	#else
1475	volume_flow_initial = volume_flow_initial_l
1476	volume_flow_area = volume_flow_area_l
1477	#endif
1478
1479	ENDIF
1480
1481	!
1482	!-- In case of 'bulk_velocity' mode, volume_flow_initial is calculated from u\|v_bulk instead
1483	IF ( TRIM( conserve_volume_flow_mode ) == 'bulk_velocity' ) THEN
1484	volume_flow_initial(1) = u_bulk * volume_flow_area(1)
1485	volume_flow_initial(2) = v_bulk * volume_flow_area(2)
1486	ENDIF
1487
1488	ENDIF
1489	!
1490	!-- In the following, surface properties can be further initialized with input from static driver
1491	!-- file.
1492	!-- At the moment this affects only default surfaces. For example, roughness length or sensible /
1493	!-- latent heat fluxes can be initialized heterogeneously for default surfaces. Therefore, a generic
1494	!-- routine from netcdf_data_input_mod is called to read a 2D array.
1495	IF ( input_pids_static ) THEN
1496	!
1497	!-- Allocate memory for possible static input
1498	ALLOCATE( tmp_2d%var(nys:nyn,nxl:nxr) )
1499	tmp_2d%var = 0.0_wp
1500	!
1501	!-- Open the static input file
1502	#if defined( __netcdf )
1503	CALL open_read_file( TRIM( input_file_static ) // &
1504	TRIM( coupling_char ), pids_id )
1505
1506	CALL inquire_num_variables( pids_id, num_var_pids )
1507	!
1508	!-- Allocate memory to store variable names and read them
1509	ALLOCATE( vars_pids(1:num_var_pids) )
1510	CALL inquire_variable_names( pids_id, vars_pids )
1511	!
1512	!-- Input roughness length.
1513	IF ( check_existence( vars_pids, 'z0' ) ) THEN
1514	!
1515	!-- Read _FillValue attribute
1516	CALL get_attribute( pids_id, char_fill, tmp_2d%fill, .FALSE., 'z0' )
1517	!
1518	!-- Read variable
1519	CALL get_variable( pids_id, 'z0', tmp_2d%var, nxl, nxr, nys, nyn )
1520	CALL add_ghost_layers( tmp_2d%var )
1521	CALL exchange_horiz_2d( tmp_2d%var )
1522	!
1523	!-- Initialize roughness length. Note, z0 will be only initialized at default-type surfaces.
1524	!-- At natural or urban z0 is implicitly initialized by the respective parameter lists.
1525	!-- Initialize horizontal surface elements.
1526	CALL init_single_surface_properties( surf_def_h(0)%z0, tmp_2d%var, surf_def_h(0)%ns, &
1527	tmp_2d%fill, surf_def_h(0)%i, surf_def_h(0)%j )
1528	!
1529	!-- Initialize roughness also at vertical surface elements.
1530	!-- Note, the actual 2D input arrays are only defined on the subdomain. Therefore, pass the
1531	!-- index arrays with their respective offset values.
1532	DO l = 0, 3
1533	CALL init_single_surface_properties( surf_def_v(l)%z0, tmp_2d%var, surf_def_v(l)%ns, &
1534	tmp_2d%fill, surf_def_v(l)%i+surf_def_v(l)%ioff, &
1535	surf_def_v(l)%j+surf_def_v(l)%joff )
1536	ENDDO
1537
1538	ENDIF
1539	!
1540	!-- Input surface sensible heat flux.
1541	IF ( check_existence( vars_pids, 'shf' ) ) THEN
1542	!
1543	!-- Read _FillValue attribute
1544	CALL get_attribute( pids_id, char_fill, tmp_2d%fill, .FALSE., 'shf' )
1545	!
1546	!-- Read variable
1547	CALL get_variable( pids_id, 'shf', tmp_2d%var, nxl, nxr, nys, nyn )
1548	CALL add_ghost_layers( tmp_2d%var )
1549	CALL exchange_horiz_2d( tmp_2d%var )
1550	!
1551	!-- Initialize heat flux. Note, shf will be only initialized at default-type surfaces. At
1552	!-- natural or urban shf is implicitly initialized by the respective parameter lists.
1553	!-- Initialize horizontal surface elements.
1554	CALL init_single_surface_properties( surf_def_h(0)%shf, tmp_2d%var, surf_def_h(0)%ns, &
1555	tmp_2d%fill, surf_def_h(0)%i, surf_def_h(0)%j )
1556	!
1557	!-- Initialize heat flux also at vertical surface elements.
1558	!-- Note, the actual 2D input arrays are only defined on the subdomain. Therefore, pass the
1559	!-- index arrays with their respective offset values.
1560	DO l = 0, 3
1561	CALL init_single_surface_properties( surf_def_v(l)%shf, tmp_2d%var, surf_def_v(l)%ns, &
1562	tmp_2d%fill, surf_def_v(l)%i+surf_def_v(l)%ioff, &
1563	surf_def_v(l)%j+surf_def_v(l)%joff )
1564	ENDDO
1565
1566	ENDIF
1567	!
1568	!-- Input surface latent heat flux.
1569	IF ( humidity ) THEN
1570	IF ( check_existence( vars_pids, 'qsws' ) ) THEN
1571	!
1572	!-- Read _FillValue attribute
1573	CALL get_attribute( pids_id, char_fill, tmp_2d%fill, .FALSE., 'qsws' )
1574	!
1575	!-- Read variable
1576	CALL get_variable( pids_id, 'qsws', tmp_2d%var, nxl, nxr, nys, nyn )
1577	CALL add_ghost_layers( tmp_2d%var )
1578	CALL exchange_horiz_2d( tmp_2d%var )
1579	!
1580	!-- Initialize latent heat flux. Note, qsws will be only initialized at default-type surfaces.
1581	!-- At natural or urban qsws is implicitly initialized by the respective parameter lists.
1582	!-- Initialize horizontal surface elements.
1583	CALL init_single_surface_properties( surf_def_h(0)%qsws, tmp_2d%var, surf_def_h(0)%ns,&
1584	tmp_2d%fill, surf_def_h(0)%i, surf_def_h(0)%j )
1585	!
1586	!-- Initialize latent heat flux also at vertical surface elements.
1587	!-- Note, the actual 2D input arrays are only defined on the subdomain. Therefore, pass the
1588	!-- index arrays with their respective offset values.
1589	DO l = 0, 3
1590	CALL init_single_surface_properties( surf_def_v(l)%qsws, tmp_2d%var, &
1591	surf_def_v(l)%ns, tmp_2d%fill, &
1592	surf_def_v(l)%i+surf_def_v(l)%ioff, &
1593	surf_def_v(l)%j+surf_def_v(l)%joff )
1594	ENDDO
1595
1596	ENDIF
1597	ENDIF
1598	!
1599	!-- Input passive scalar flux.
1600	IF ( passive_scalar ) THEN
1601	IF ( check_existence( vars_pids, 'ssws' ) ) THEN
1602	!
1603	!-- Read _FillValue attribute
1604	CALL get_attribute( pids_id, char_fill, tmp_2d%fill, .FALSE., 'ssws' )
1605	!
1606	!-- Read variable
1607	CALL get_variable( pids_id, 'ssws', tmp_2d%var, nxl, nxr, nys, nyn )
1608	CALL add_ghost_layers( tmp_2d%var )
1609	CALL exchange_horiz_2d( tmp_2d%var )
1610	!
1611	!-- Initialize passive scalar flux. Initialize horizontal surface elements.
1612	CALL init_single_surface_properties( surf_def_h(0)%ssws, tmp_2d%var, surf_def_h(0)%ns,&
1613	tmp_2d%fill, surf_def_h(0)%i, surf_def_h(0)%j )
1614
1615	DO l = 0, 3
1616	CALL init_single_surface_properties( surf_def_v(l)%ssws, tmp_2d%var, &
1617	surf_def_v(l)%ns, tmp_2d%fill, &
1618	surf_def_v(l)%i+surf_def_v(l)%ioff, &
1619	surf_def_v(l)%j+surf_def_v(l)%joff )
1620	ENDDO
1621
1622	ENDIF
1623	ENDIF
1624	!
1625	!-- Additional variables, can be initialized the
1626	!-- same way.
1627
1628	!
1629	!-- Finally, close the input file and deallocate temporary arrays
1630	DEALLOCATE( vars_pids )
1631
1632	CALL close_input_file( pids_id )
1633	#endif
1634	DEALLOCATE( tmp_2d%var )
1635	ENDIF
1636	!
1637	!-- Finally, if random_heatflux is set, disturb shf at horizontal surfaces. Actually, this should be
1638	!-- done in surface_mod, where all other initializations of surface quantities are done. However,
1639	!-- this would create a ring dependency, hence, it is done here. Maybe delete disturb_heatflux and
1640	!-- tranfer the respective code directly into the initialization in surface_mod.
1641	IF ( TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
1642	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
1643
1644	IF ( use_surface_fluxes .AND. constant_heatflux .AND. random_heatflux ) THEN
1645	IF ( surf_def_h(0)%ns >= 1 ) CALL disturb_heatflux( surf_def_h(0) )
1646	IF ( surf_lsm_h(0)%ns >= 1 ) CALL disturb_heatflux( surf_lsm_h(0) )
1647	IF ( surf_usm_h(0)%ns >= 1 ) CALL disturb_heatflux( surf_usm_h(0) )
1648	ENDIF
1649	ENDIF
1650
1651	!
1652	!-- Compute total sum of grid points and the mean surface level height for each statistic region.
1653	!-- These are mainly used for horizontal averaging of turbulence statistics.
1654	!-- ngp_2dh: number of grid points of a horizontal cross section through the respective statistic
1655	!-- region
1656	!-- ngp_3d: number of grid points of the respective statistic region
1657	ngp_2dh_outer_l = 0
1658	ngp_2dh_outer = 0
1659	ngp_2dh_s_inner_l = 0
1660	ngp_2dh_s_inner = 0
1661	ngp_2dh_l = 0
1662	ngp_2dh = 0
1663	ngp_3d_inner_l = 0.0_wp
1664	ngp_3d_inner = 0
1665	ngp_3d = 0
1666	ngp_sums = ( nz + 2 ) * ( pr_palm + max_pr_user )
1667
1668	mean_surface_level_height = 0.0_wp
1669	mean_surface_level_height_l = 0.0_wp
1670	!
1671	!-- To do: New concept for these non-topography grid points!
1672	DO sr = 0, statistic_regions
1673	DO i = nxl, nxr
1674	DO j = nys, nyn
1675	IF ( rmask(j,i,sr) == 1.0_wp ) THEN
1676	!
1677	!-- All xy-grid points
1678	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
1679	!
1680	!-- Determine mean surface-level height. In case of downward-facing walls are present,
1681	!-- more than one surface level exist.
1682	!-- In this case, use the lowest surface-level height.
1683	IF ( surf_def_h(0)%start_index(j,i) <= surf_def_h(0)%end_index(j,i) ) THEN
1684	m = surf_def_h(0)%start_index(j,i)
1685	k = surf_def_h(0)%k(m)
1686	mean_surface_level_height_l(sr) = mean_surface_level_height_l(sr) + zw(k-1)
1687	ENDIF
1688	IF ( surf_lsm_h(0)%start_index(j,i) <= surf_lsm_h(0)%end_index(j,i) ) THEN
1689	m = surf_lsm_h(0)%start_index(j,i)
1690	k = surf_lsm_h(0)%k(m)
1691	mean_surface_level_height_l(sr) = mean_surface_level_height_l(sr) + zw(k-1)
1692	ENDIF
1693	IF ( surf_usm_h(0)%start_index(j,i) <= surf_usm_h(0)%end_index(j,i) ) THEN
1694	m = surf_usm_h(0)%start_index(j,i)
1695	k = surf_usm_h(0)%k(m)
1696	mean_surface_level_height_l(sr) = mean_surface_level_height_l(sr) + zw(k-1)
1697	ENDIF
1698
1699	k_surf = k - 1
1700
1701	DO k = nzb, nzt+1
1702	!
1703	!-- xy-grid points above topography
1704	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + &
1705	MERGE( 1, 0, BTEST( wall_flags_total_0(k,j,i), 24 ) )
1706
1707	ngp_2dh_s_inner_l(k,sr) = ngp_2dh_s_inner_l(k,sr) + &
1708	MERGE( 1, 0, BTEST( wall_flags_total_0(k,j,i), 22 ) )
1709
1710	ENDDO
1711	!
1712	!-- All grid points of the total domain above topography
1713	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + ( nz - k_surf + 2 )
1714
1715
1716
1717	ENDIF
1718	ENDDO
1719	ENDDO
1720	ENDDO
1721
1722	sr = statistic_regions + 1
1723	#if defined( __parallel )
1724	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1725	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, comm2d, ierr )
1726	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1727	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, MPI_INTEGER, MPI_SUM, &
1728	comm2d, ierr )
1729	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1730	CALL MPI_ALLREDUCE( ngp_2dh_s_inner_l(0,0), ngp_2dh_s_inner(0,0), (nz+2)*sr, MPI_INTEGER, &
1731	MPI_SUM, comm2d, ierr )
1732	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1733	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner_tmp(0), sr, MPI_REAL, MPI_SUM, comm2d, &
1734	ierr )
1735	ngp_3d_inner = INT( ngp_3d_inner_tmp, KIND = SELECTED_INT_KIND( 18 ) )
1736	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1737	CALL MPI_ALLREDUCE( mean_surface_level_height_l(0), mean_surface_level_height(0), sr, MPI_REAL,&
1738	MPI_SUM, comm2d, ierr )
1739	mean_surface_level_height = mean_surface_level_height / REAL( ngp_2dh )
1740	#else
1741	ngp_2dh = ngp_2dh_l
1742	ngp_2dh_outer = ngp_2dh_outer_l
1743	ngp_2dh_s_inner = ngp_2dh_s_inner_l
1744	ngp_3d_inner = INT( ngp_3d_inner_l, KIND = SELECTED_INT_KIND( 18 ) )
1745	mean_surface_level_height = mean_surface_level_height_l / REAL( ngp_2dh_l )
1746	#endif
1747
1748	ngp_3d = INT ( ngp_2dh, KIND = SELECTED_INT_KIND( 18 ) ) * &
1749	INT ( (nz + 2 ), KIND = SELECTED_INT_KIND( 18 ) )
1750
1751	!
1752	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics, buoyancy, etc. A
1753	!-- zero value will occur for cases where all grid points of the respective subdomain lie below the
1754	!-- surface topography
1755	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
1756	ngp_3d_inner = MAX( INT(1, KIND = SELECTED_INT_KIND( 18 )), ngp_3d_inner(:) )
1757	ngp_2dh_s_inner = MAX( 1, ngp_2dh_s_inner(:,:) )
1758
1759	DEALLOCATE( mean_surface_level_height_l, ngp_2dh_l, ngp_2dh_outer_l, ngp_3d_inner_l, &
1760	ngp_3d_inner_tmp )
1761
1762	!
1763	!-- Initializae 3D offline nesting in COSMO model and read data from
1764	!-- external NetCDF file.
1765	IF ( nesting_offline ) CALL nesting_offl_init
1766	!
1767	!-- Initialize quantities for special advections schemes
1768	CALL init_advec
1769
1770	!
1771	!-- Impose random perturbation on the horizontal velocity field and then
1772	!-- remove the divergences from the velocity field at the initial stage
1773	IF ( create_disturbances .AND. disturbance_energy_limit /= 0.0_wp .AND. &
1774	TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
1775	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
1776
1777	IF ( debug_output ) THEN
1778	CALL debug_message( 'creating disturbances + applying pressure solver', 'start' )
1779	ENDIF
1780	!
1781	!-- Needed for both disturb_field and pres
1782	!$ACC DATA &
1783	!$ACC CREATE(tend(nzb:nzt+1,nysg:nyng,nxlg:nxrg)) &
1784	!$ACC COPY(u(nzb:nzt+1,nysg:nyng,nxlg:nxrg)) &
1785	!$ACC COPY(v(nzb:nzt+1,nysg:nyng,nxlg:nxrg))
1786
1787	CALL disturb_field( 'u', tend, u )
1788	CALL disturb_field( 'v', tend, v )
1789
1790	!$ACC DATA &
1791	!$ACC CREATE(d(nzb+1:nzt,nys:nyn,nxl:nxr)) &
1792	!$ACC COPY(w(nzb:nzt+1,nysg:nyng,nxlg:nxrg)) &
1793	!$ACC COPY(p(nzb:nzt+1,nysg:nyng,nxlg:nxrg)) &
1794	!$ACC COPYIN(rho_air(nzb:nzt+1), rho_air_zw(nzb:nzt+1)) &
1795	!$ACC COPYIN(ddzu(1:nzt+1), ddzw(1:nzt+1)) &
1796	!$ACC COPYIN(wall_flags_total_0(nzb:nzt+1,nysg:nyng,nxlg:nxrg)) &
1797	!$ACC COPYIN(bc_h(0:1)) &
1798	!$ACC COPYIN(bc_h(0)%i(1:bc_h(0)%ns)) &
1799	!$ACC COPYIN(bc_h(0)%j(1:bc_h(0)%ns)) &
1800	!$ACC COPYIN(bc_h(0)%k(1:bc_h(0)%ns)) &
1801	!$ACC COPYIN(bc_h(1)%i(1:bc_h(1)%ns)) &
1802	!$ACC COPYIN(bc_h(1)%j(1:bc_h(1)%ns)) &
1803	!$ACC COPYIN(bc_h(1)%k(1:bc_h(1)%ns))
1804
1805	n_sor = nsor_ini
1806	CALL pres
1807	n_sor = nsor
1808
1809	!$ACC END DATA
1810	!$ACC END DATA
1811
1812	IF ( debug_output ) THEN
1813	CALL debug_message( 'creating disturbances + applying pressure solver', 'end' )
1814	ENDIF
1815
1816	ENDIF
1817
1818	IF ( .NOT. ocean_mode ) THEN
1819
1820	ALLOCATE( hyp(nzb:nzt+1) )
1821	ALLOCATE( d_exner(nzb:nzt+1) )
1822	ALLOCATE( exner(nzb:nzt+1) )
1823	ALLOCATE( hyrho(nzb:nzt+1) )
1824	!
1825	!-- Check temperature in case of too large domain height
1826	DO k = nzb, nzt+1
1827	IF ( ( pt_surface * exner_function( surface_pressure * 100.0_wp ) - g/c_p * zu(k) ) &
1828	< 0.0_wp ) THEN
1829	WRITE( message_string, * ) 'absolute temperature < 0.0 at zu(', k, ') = ', zu(k)
1830	CALL message( 'init_3d_model', 'PA0142', 1, 2, 0, 6, 0 )
1831	ENDIF
1832	ENDDO
1833
1834	!
1835	!-- Calculate vertical profile of the hydrostatic pressure (hyp)
1836	hyp = barometric_formula( zu, pt_surface * exner_function( surface_pressure * 100.0_wp ),&
1837	surface_pressure * 100.0_wp )
1838	d_exner = exner_function_invers( hyp )
1839	exner = 1.0_wp / exner_function_invers( hyp )
1840	hyrho = ideal_gas_law_rho_pt( hyp, pt_init )
1841	!
1842	!-- Compute reference density
1843	rho_surface = ideal_gas_law_rho( surface_pressure * 100.0_wp, &
1844	pt_surface * exner_function( surface_pressure * 100.0_wp ) )
1845
1846	ENDIF
1847
1848	!
1849	!-- If required, initialize particles
1850	IF ( agents_active ) CALL mas_init
1851	!
1852	!-- Initialization of synthetic turbulence generator
1853	IF ( syn_turb_gen ) CALL stg_init
1854	!
1855	!-- Initializing actions for all other modules
1856	CALL module_interface_init
1857	!
1858	!-- Initialize surface layer (done after LSM as roughness length are required for initialization
1859	IF ( constant_flux_layer ) CALL init_surface_layer_fluxes
1860	!
1861	!-- Initialize surface data output
1862	IF ( surface_output ) CALL surface_data_output_init
1863	!
1864	!-- Initialize the ws-scheme.
1865	IF ( ws_scheme_sca .OR. ws_scheme_mom ) CALL ws_init
1866	!
1867	!-- Perform post-initializing checks for all other modules
1868	CALL module_interface_init_checks
1869
1870	!
1871	!-- Initialize surface forcing corresponding to large-scale forcing. Therein,
1872	!-- initialize heat-fluxes, etc. via datatype. Revise it later!
1873	IF ( large_scale_forcing .AND. lsf_surf ) THEN
1874	IF ( use_surface_fluxes .AND. constant_heatflux ) THEN
1875	CALL ls_forcing_surf( simulated_time )
1876	ENDIF
1877	ENDIF
1878	!
1879	!-- Setting weighting factors for calculation of perturbation pressure and turbulent quantities from
1880	!-- the RK substeps.
1881	IF ( TRIM( timestep_scheme ) == 'runge-kutta-3' ) THEN ! for RK3-method
1882
1883	weight_substep(1) = 1._wp/6._wp
1884	weight_substep(2) = 3._wp/10._wp
1885	weight_substep(3) = 8._wp/15._wp
1886
1887	weight_pres(1) = 1._wp/3._wp
1888	weight_pres(2) = 5._wp/12._wp
1889	weight_pres(3) = 1._wp/4._wp
1890
1891	ELSEIF ( TRIM( timestep_scheme ) == 'runge-kutta-2' ) THEN ! for RK2-method
1892
1893	weight_substep(1) = 1._wp/2._wp
1894	weight_substep(2) = 1._wp/2._wp
1895
1896	weight_pres(1) = 1._wp/2._wp
1897	weight_pres(2) = 1._wp/2._wp
1898
1899	ELSE ! for Euler-method
1900
1901	weight_substep(1) = 1.0_wp
1902	weight_pres(1) = 1.0_wp
1903
1904	ENDIF
1905
1906	!
1907	!-- Initialize Rayleigh damping factors
1908	rdf = 0.0_wp
1909	rdf_sc = 0.0_wp
1910	IF ( rayleigh_damping_factor /= 0.0_wp ) THEN
1911
1912	IF ( .NOT. ocean_mode ) THEN
1913	DO k = nzb+1, nzt
1914	IF ( zu(k) >= rayleigh_damping_height ) THEN
1915	rdf(k) = rayleigh_damping_factor * &
1916	( SIN( pi * 0.5_wp * ( zu(k) - rayleigh_damping_height ) &
1917	/ ( zu(nzt) - rayleigh_damping_height ) ) &
1918	)**2
1919	ENDIF
1920	ENDDO
1921	ELSE
1922	!
1923	!-- In ocean mode, rayleigh damping is applied in the lower part of the model domain
1924	DO k = nzt, nzb+1, -1
1925	IF ( zu(k) <= rayleigh_damping_height ) THEN
1926	rdf(k) = rayleigh_damping_factor * &
1927	( SIN( pi * 0.5_wp * ( rayleigh_damping_height - zu(k) ) &
1928	/ ( rayleigh_damping_height - zu(nzb+1) ) ) &
1929	)**2
1930	ENDIF
1931	ENDDO
1932	ENDIF
1933
1934	ENDIF
1935	IF ( scalar_rayleigh_damping ) rdf_sc = rdf
1936
1937	!
1938	!-- Initialize the starting level and the vertical smoothing factor used for the external pressure
1939	!-- gradient
1940	dp_smooth_factor = 1.0_wp
1941	IF ( dp_external ) THEN
1942	!
1943	!-- Set the starting level dp_level_ind_b only if it has not been set before (e.g. in init_grid).
1944	IF ( dp_level_ind_b == 0 ) THEN
1945	ind_array = MINLOC( ABS( dp_level_b - zu ) )
1946	dp_level_ind_b = ind_array(1) - 1 + nzb
1947	! MINLOC uses lower array bound 1
1948	ENDIF
1949	IF ( dp_smooth ) THEN
1950	dp_smooth_factor(:dp_level_ind_b) = 0.0_wp
1951	DO k = dp_level_ind_b+1, nzt
1952	dp_smooth_factor(k) = 0.5_wp * ( 1.0_wp + SIN( pi * &
1953	( REAL( k - dp_level_ind_b, KIND=wp ) / &
1954	REAL( nzt - dp_level_ind_b, KIND=wp ) - 0.5_wp ) ) )
1955	ENDDO
1956	ENDIF
1957	ENDIF
1958
1959	!
1960	!-- Initialize damping zone for the potential temperature in case of non-cyclic lateral boundaries.
1961	!-- The damping zone has the maximum value at the inflow boundary and decreases to zero at
1962	!-- pt_damping_width.
1963	ptdf_x = 0.0_wp
1964	ptdf_y = 0.0_wp
1965	IF ( bc_lr_dirrad ) THEN
1966	DO i = nxl, nxr
1967	IF ( ( i * dx ) < pt_damping_width ) THEN
1968	ptdf_x(i) = pt_damping_factor * ( SIN( pi * 0.5_wp * &
1969	REAL( pt_damping_width - i * dx, KIND=wp ) / &
1970	REAL( pt_damping_width, KIND=wp ) ) )**2
1971	ENDIF
1972	ENDDO
1973	ELSEIF ( bc_lr_raddir ) THEN
1974	DO i = nxl, nxr
1975	IF ( ( i * dx ) > ( nx * dx - pt_damping_width ) ) THEN
1976	ptdf_x(i) = pt_damping_factor * SIN( pi * 0.5_wp * &
1977	( ( i - nx ) * dx + pt_damping_width ) / &
1978	REAL( pt_damping_width, KIND=wp ) )**2
1979	ENDIF
1980	ENDDO
1981	ELSEIF ( bc_ns_dirrad ) THEN
1982	DO j = nys, nyn
1983	IF ( ( j * dy ) > ( ny * dy - pt_damping_width ) ) THEN
1984	ptdf_y(j) = pt_damping_factor * SIN( pi * 0.5_wp * &
1985	( ( j - ny ) * dy + pt_damping_width ) / &
1986	REAL( pt_damping_width, KIND=wp ) )**2
1987	ENDIF
1988	ENDDO
1989	ELSEIF ( bc_ns_raddir ) THEN
1990	DO j = nys, nyn
1991	IF ( ( j * dy ) < pt_damping_width ) THEN
1992	ptdf_y(j) = pt_damping_factor * SIN( pi * 0.5_wp * &
1993	( pt_damping_width - j * dy ) / &
1994	REAL( pt_damping_width, KIND=wp ) )**2
1995	ENDIF
1996	ENDDO
1997	ENDIF
1998
1999	!
2000	!-- Input binary data file is not needed anymore. This line must be placed after call of user_init!
2001	CALL close_file( 13 )
2002	!
2003	!-- In case of nesting, put an barrier to assure that all parent and child domains finished
2004	!-- initialization.
2005	#if defined( __parallel )
2006	IF ( nested_run ) CALL MPI_BARRIER( MPI_COMM_WORLD, ierr )
2007	#endif
2008
2009
2010	CALL location_message( 'model initialization', 'finished' )
2011
2012	END SUBROUTINE init_3d_model

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source: palm/trunk/SOURCE/init_3d_model.f90 @ 4899

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