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init_3d_model.f90 @ 4210

Last change on this file since 4210 was 4187, checked in by suehring, 5 years ago

radiation: Take external radiation input from root domain dynamic file if no dynamic input file is provided for each nested domain; radiation: Combine MPI_ALLREDUCE calls to reduce latency; land_surface + plant_canopy: Give specific error numbers; land-surface: Adjust error messages for local checks; init_3d_model: Deallocate temporary string array for netcdf-data input since it may be re-used in other modules for different input files

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/palm/branches/chemistry/SOURCE/init_3d_model.f90	2047-3190,3218-3297
/palm/branches/forwind/SOURCE/init_3d_model.f90	1564-1913
/palm/branches/mosaik_M2/init_3d_model.f90	2360-3471
/palm/branches/palm4u/SOURCE/init_3d_model.f90	2540-2692
/palm/branches/rans/SOURCE/init_3d_model.f90	2078-3128
/palm/branches/resler/SOURCE/init_3d_model.f90	2023-3605
/palm/branches/salsa/SOURCE/init_3d_model.f90	2503-3581

File size: 81.0 KB

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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
6	! terms of the GNU General Public License as published by the Free Software
7	! Foundation, either version 3 of the License, or (at your option) any later
8	! version.
9	!
10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
13	!
14	! You should have received a copy of the GNU General Public License along with
15	! PALM. If not, see <http://www.gnu.org/licenses/>.
16	!
17	! Copyright 1997-2019 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: init_3d_model.f90 4187 2019-08-26 12:43:15Z suehring $
27	! Deallocate temporary string array since it may be re-used to read different
28	! input data in other modules
29	!
30	! 4186 2019-08-23 16:06:14Z suehring
31	! Design change, use variables defined in netcdf_data_input_mod to read netcd
32	! variables rather than define local ones.
33	!
34	! 4185 2019-08-23 13:49:38Z oliver.maas
35	! For initializing_actions = ' cyclic_fill':
36	! Overwrite u_init, v_init, pt_init, q_init and s_init with the
37	! (temporally) and horizontally averaged vertical profiles from the end
38	! of the prerun, because these profiles shall be used as the basic state
39	! for the rayleigh damping and the pt_damping.
40	!
41	! 4182 2019-08-22 15:20:23Z scharf
42	! Corrected "Former revisions" section
43	!
44	! 4168 2019-08-16 13:50:17Z suehring
45	! Replace function get_topography_top_index by topo_top_ind
46	!
47	! 4151 2019-08-09 08:24:30Z suehring
48	! Add netcdf directive around input calls (fix for last commit)
49	!
50	! 4150 2019-08-08 20:00:47Z suehring
51	! Input of additional surface variables independent on land- or urban-surface
52	! model
53	!
54	! 4131 2019-08-02 11:06:18Z monakurppa
55	! Allocate sums and sums_l to allow profile output for salsa variables.
56	!
57	! 4130 2019-08-01 13:04:13Z suehring
58	! Effectively reduce 3D initialization to 1D initial profiles. This is because
59	! 3D initialization produces structures in the w-component that are correlated
60	! with the processor grid for some unknown reason
61	!
62	! 4090 2019-07-11 15:06:47Z Giersch
63	! Unused variables removed
64	!
65	! 4088 2019-07-11 13:57:56Z Giersch
66	! Pressure and density profile calculations revised using basic functions
67	!
68	! 4048 2019-06-21 21:00:21Z knoop
69	! Further modularization of particle code components
70	!
71	! 4017 2019-06-06 12:16:46Z schwenkel
72	! Convert most location messages to debug messages to reduce output in
73	! job logfile to a minimum
74	!
75	!
76	! unused variable removed
77	!
78	! 3937 2019-04-29 15:09:07Z suehring
79	! Move initialization of synthetic turbulence generator behind initialization
80	! of offline nesting. Remove call for stg_adjust, as this is now already done
81	! in stg_init.
82	!
83	! 3900 2019-04-16 15:17:43Z suehring
84	! Fix problem with LOD = 2 initialization
85	!
86	! 3885 2019-04-11 11:29:34Z kanani
87	! Changes related to global restructuring of location messages and introduction
88	! of additional debug messages
89	!
90	! 3849 2019-04-01 16:35:16Z knoop
91	! Move initialization of rmask before initializing user_init_arrays
92	!
93	! 3711 2019-01-31 13:44:26Z knoop
94	! Introduced module_interface_init_checks for post-init checks in modules
95	!
96	! 3700 2019-01-26 17:03:42Z knoop
97	! Some interface calls moved to module_interface + cleanup
98	!
99	! 3648 2019-01-02 16:35:46Z suehring
100	! Rename subroutines for surface-data output
101	!
102	! Revision 1.1 1998/03/09 16:22:22 raasch
103	! Initial revision
104	!
105	!
106	! Description:
107	! ------------
108	!> Allocation of arrays and initialization of the 3D model via
109	!> a) pre-run the 1D model
110	!> or
111	!> b) pre-set constant linear profiles
112	!> or
113	!> c) read values of a previous run
114	!------------------------------------------------------------------------------!
115	SUBROUTINE init_3d_model
116
117
118	USE advec_ws
119
120	USE arrays_3d
121
122	USE basic_constants_and_equations_mod, &
123	ONLY: c_p, g, l_v, pi, exner_function, exner_function_invers, &
124	ideal_gas_law_rho, ideal_gas_law_rho_pt, barometric_formula
125
126	USE bulk_cloud_model_mod, &
127	ONLY: bulk_cloud_model
128
129	USE chem_modules, &
130	ONLY: max_pr_cs ! ToDo: this dependency needs to be removed cause it is ugly #new_dom
131
132	USE control_parameters
133
134	USE grid_variables, &
135	ONLY: dx, dy, ddx2_mg, ddy2_mg
136
137	USE indices
138
139	USE kinds
140
141	USE lsf_nudging_mod, &
142	ONLY: ls_forcing_surf
143
144	USE model_1d_mod, &
145	ONLY: init_1d_model, l1d, u1d, v1d
146
147	USE module_interface, &
148	ONLY: module_interface_init_arrays, &
149	module_interface_init, &
150	module_interface_init_checks
151
152	USE multi_agent_system_mod, &
153	ONLY: agents_active, mas_init
154
155	USE netcdf_interface, &
156	ONLY: dots_max
157
158	USE netcdf_data_input_mod, &
159	ONLY: char_fill, &
160	check_existence, &
161	close_input_file, &
162	get_attribute, &
163	get_variable, &
164	init_3d, &
165	input_pids_static, &
166	inquire_num_variables, &
167	inquire_variable_names, &
168	input_file_static, &
169	netcdf_data_input_init_3d, &
170	num_var_pids, &
171	open_read_file, &
172	pids_id, &
173	real_2d, &
174	vars_pids
175
176	USE nesting_offl_mod, &
177	ONLY: nesting_offl_init
178
179	USE pegrid
180
181	#if defined( __parallel )
182	USE pmc_interface, &
183	ONLY: nested_run
184	#endif
185
186	USE random_function_mod
187
188	USE random_generator_parallel, &
189	ONLY: init_parallel_random_generator
190
191	USE read_restart_data_mod, &
192	ONLY: rrd_read_parts_of_global, rrd_local
193
194	USE statistics, &
195	ONLY: hom, hom_sum, mean_surface_level_height, pr_palm, rmask, &
196	statistic_regions, sums, sums_divnew_l, sums_divold_l, sums_l, &
197	sums_l_l, sums_wsts_bc_l, ts_value, &
198	weight_pres, weight_substep
199
200	USE synthetic_turbulence_generator_mod, &
201	ONLY: stg_init, use_syn_turb_gen
202
203	USE surface_layer_fluxes_mod, &
204	ONLY: init_surface_layer_fluxes
205
206	USE surface_mod, &
207	ONLY : init_single_surface_properties, &
208	init_surface_arrays, &
209	init_surfaces, &
210	surf_def_h, &
211	surf_def_v, &
212	surf_lsm_h, &
213	surf_usm_h
214
215	#if defined( _OPENACC )
216	USE surface_mod, &
217	ONLY : bc_h
218	#endif
219
220	USE surface_data_output_mod, &
221	ONLY: surface_data_output_init
222
223	USE transpose_indices
224
225	IMPLICIT NONE
226
227	INTEGER(iwp) :: i !< grid index in x direction
228	INTEGER(iwp) :: ind_array(1) !< dummy used to determine start index for external pressure forcing
229	INTEGER(iwp) :: j !< grid index in y direction
230	INTEGER(iwp) :: k !< grid index in z direction
231	INTEGER(iwp) :: k_surf !< surface level index
232	INTEGER(iwp) :: l !< running index over surface orientation
233	INTEGER(iwp) :: m !< index of surface element in surface data type
234	INTEGER(iwp) :: nz_u_shift !< topography-top index on u-grid, used to vertically shift initial profiles
235	INTEGER(iwp) :: nz_v_shift !< topography-top index on v-grid, used to vertically shift initial profiles
236	INTEGER(iwp) :: nz_w_shift !< topography-top index on w-grid, used to vertically shift initial profiles
237	INTEGER(iwp) :: nz_s_shift !< topography-top index on scalar-grid, used to vertically shift initial profiles
238	INTEGER(iwp) :: nz_u_shift_l !< topography-top index on u-grid, used to vertically shift initial profiles
239	INTEGER(iwp) :: nz_v_shift_l !< topography-top index on v-grid, used to vertically shift initial profiles
240	INTEGER(iwp) :: nz_w_shift_l !< topography-top index on w-grid, used to vertically shift initial profiles
241	INTEGER(iwp) :: nz_s_shift_l !< topography-top index on scalar-grid, used to vertically shift initial profiles
242	INTEGER(iwp) :: nzt_l !< index of top PE boundary for multigrid level
243	INTEGER(iwp) :: sr !< index of statistic region
244
245	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ngp_2dh_l !< toal number of horizontal grid points in statistical region on subdomain
246
247	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_outer_l !< number of horizontal non-wall bounded grid points on subdomain
248	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: ngp_2dh_s_inner_l !< number of horizontal non-topography grid points on subdomain
249
250
251
252	REAL(wp), DIMENSION(:), ALLOCATABLE :: init_l !< dummy array used for averaging 3D data to obtain inital profiles
253	REAL(wp), DIMENSION(:), ALLOCATABLE :: p_hydrostatic !< hydrostatic pressure
254
255	REAL(wp) :: dx_l !< grid spacing along x on different multigrid level
256	REAL(wp) :: dy_l !< grid spacing along y on different multigrid level
257
258	REAL(wp), DIMENSION(1:3) :: volume_flow_area_l !< area of lateral and top model domain surface on local subdomain
259	REAL(wp), DIMENSION(1:3) :: volume_flow_initial_l !< initial volume flow into model domain
260
261	REAL(wp), DIMENSION(:), ALLOCATABLE :: mean_surface_level_height_l !< mean surface level height on subdomain
262	REAL(wp), DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_l !< total number of non-topography grid points on subdomain
263	REAL(wp), DIMENSION(:), ALLOCATABLE :: ngp_3d_inner_tmp !< total number of non-topography grid points
264
265	TYPE(real_2d) :: tmp_2d !< temporary variable to input additional surface-data from static file
266
267	CALL location_message( 'model initialization', 'start' )
268
269	IF ( debug_output ) CALL debug_message( 'allocating arrays', 'start' )
270	!
271	!-- Allocate arrays
272	ALLOCATE( mean_surface_level_height(0:statistic_regions), &
273	mean_surface_level_height_l(0:statistic_regions), &
274	ngp_2dh(0:statistic_regions), ngp_2dh_l(0:statistic_regions), &
275	ngp_3d(0:statistic_regions), &
276	ngp_3d_inner(0:statistic_regions), &
277	ngp_3d_inner_l(0:statistic_regions), &
278	ngp_3d_inner_tmp(0:statistic_regions), &
279	sums_divnew_l(0:statistic_regions), &
280	sums_divold_l(0:statistic_regions) )
281	ALLOCATE( dp_smooth_factor(nzb:nzt), rdf(nzb+1:nzt), rdf_sc(nzb+1:nzt) )
282	ALLOCATE( ngp_2dh_outer(nzb:nzt+1,0:statistic_regions), &
283	ngp_2dh_outer_l(nzb:nzt+1,0:statistic_regions), &
284	ngp_2dh_s_inner(nzb:nzt+1,0:statistic_regions), &
285	ngp_2dh_s_inner_l(nzb:nzt+1,0:statistic_regions), &
286	rmask(nysg:nyng,nxlg:nxrg,0:statistic_regions), &
287	sums(nzb:nzt+1,pr_palm+max_pr_user+max_pr_cs+max_pr_salsa), &
288	sums_l(nzb:nzt+1,pr_palm+max_pr_user+max_pr_cs+max_pr_salsa,0:threads_per_task-1), &
289	sums_l_l(nzb:nzt+1,0:statistic_regions,0:threads_per_task-1), &
290	sums_wsts_bc_l(nzb:nzt+1,0:statistic_regions) )
291	ALLOCATE( ts_value(dots_max,0:statistic_regions) )
292	ALLOCATE( ptdf_x(nxlg:nxrg), ptdf_y(nysg:nyng) )
293
294	ALLOCATE( d(nzb+1:nzt,nys:nyn,nxl:nxr), &
295	p(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
296	tend(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
297
298	ALLOCATE( pt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
299	pt_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
300	u_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
301	u_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
302	u_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
303	v_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
304	v_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
305	v_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
306	w_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
307	w_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
308	w_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
309	IF ( .NOT. neutral ) THEN
310	ALLOCATE( pt_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
311	ENDIF
312	!
313	!-- Pre-set masks for regional statistics. Default is the total model domain.
314	!-- Ghost points are excluded because counting values at the ghost boundaries
315	!-- would bias the statistics
316	rmask = 1.0_wp
317	rmask(:,nxlg:nxl-1,:) = 0.0_wp; rmask(:,nxr+1:nxrg,:) = 0.0_wp
318	rmask(nysg:nys-1,:,:) = 0.0_wp; rmask(nyn+1:nyng,:,:) = 0.0_wp
319	!
320	!-- Following array is required for perturbation pressure within the iterative
321	!-- pressure solvers. For the multistep schemes (Runge-Kutta), array p holds
322	!-- the weighted average of the substeps and cannot be used in the Poisson
323	!-- solver.
324	IF ( psolver == 'sor' ) THEN
325	ALLOCATE( p_loc(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
326	ELSEIF ( psolver(1:9) == 'multigrid' ) THEN
327	!
328	!-- For performance reasons, multigrid is using one ghost layer only
329	ALLOCATE( p_loc(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
330	ENDIF
331
332	!
333	!-- Array for storing constant coeffficients of the tridiagonal solver
334	IF ( psolver == 'poisfft' ) THEN
335	ALLOCATE( tri(nxl_z:nxr_z,nys_z:nyn_z,0:nz-1,2) )
336	ALLOCATE( tric(nxl_z:nxr_z,nys_z:nyn_z,0:nz-1) )
337	ENDIF
338
339	IF ( humidity ) THEN
340	!
341	!-- 3D-humidity
342	ALLOCATE( q_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
343	q_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
344	q_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
345	vpt_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
346	ENDIF
347
348	IF ( passive_scalar ) THEN
349
350	!
351	!-- 3D scalar arrays
352	ALLOCATE( s_1(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
353	s_2(nzb:nzt+1,nysg:nyng,nxlg:nxrg), &
354	s_3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
355
356	ENDIF
357
358	!
359	!-- Allocate and set 1d-profiles for Stokes drift velocity. It may be set to
360	!-- non-zero values later in ocean_init
361	ALLOCATE( u_stokes_zu(nzb:nzt+1), u_stokes_zw(nzb:nzt+1), &
362	v_stokes_zu(nzb:nzt+1), v_stokes_zw(nzb:nzt+1) )
363	u_stokes_zu(:) = 0.0_wp
364	u_stokes_zw(:) = 0.0_wp
365	v_stokes_zu(:) = 0.0_wp
366	v_stokes_zw(:) = 0.0_wp
367
368	!
369	!-- Allocation of anelastic and Boussinesq approximation specific arrays
370	ALLOCATE( p_hydrostatic(nzb:nzt+1) )
371	ALLOCATE( rho_air(nzb:nzt+1) )
372	ALLOCATE( rho_air_zw(nzb:nzt+1) )
373	ALLOCATE( drho_air(nzb:nzt+1) )
374	ALLOCATE( drho_air_zw(nzb:nzt+1) )
375	!
376	!-- Density profile calculation for anelastic and Boussinesq approximation
377	!-- In case of a Boussinesq approximation, a constant density is calculated
378	!-- mainly for output purposes. This density do not need to be considered
379	!-- in the model's system of equations.
380	IF ( TRIM( approximation ) == 'anelastic' ) THEN
381	DO k = nzb, nzt+1
382	p_hydrostatic(k) = barometric_formula(zu(k), pt_surface * &
383	exner_function(surface_pressure * 100.0_wp), &
384	surface_pressure * 100.0_wp)
385
386	rho_air(k) = ideal_gas_law_rho_pt(p_hydrostatic(k), pt_init(k))
387	ENDDO
388
389	DO k = nzb, nzt
390	rho_air_zw(k) = 0.5_wp * ( rho_air(k) + rho_air(k+1) )
391	ENDDO
392
393	rho_air_zw(nzt+1) = rho_air_zw(nzt) &
394	+ 2.0_wp * ( rho_air(nzt+1) - rho_air_zw(nzt) )
395
396	ELSE
397	DO k = nzb, nzt+1
398	p_hydrostatic(k) = barometric_formula(zu(nzb), pt_surface * &
399	exner_function(surface_pressure * 100.0_wp), &
400	surface_pressure * 100.0_wp)
401
402	rho_air(k) = ideal_gas_law_rho_pt(p_hydrostatic(k), pt_init(nzb))
403	ENDDO
404
405	DO k = nzb, nzt
406	rho_air_zw(k) = 0.5_wp * ( rho_air(k) + rho_air(k+1) )
407	ENDDO
408
409	rho_air_zw(nzt+1) = rho_air_zw(nzt) &
410	+ 2.0_wp * ( rho_air(nzt+1) - rho_air_zw(nzt) )
411
412	ENDIF
413	!
414	!-- compute the inverse density array in order to avoid expencive divisions
415	drho_air = 1.0_wp / rho_air
416	drho_air_zw = 1.0_wp / rho_air_zw
417
418	!
419	!-- Allocation of flux conversion arrays
420	ALLOCATE( heatflux_input_conversion(nzb:nzt+1) )
421	ALLOCATE( waterflux_input_conversion(nzb:nzt+1) )
422	ALLOCATE( momentumflux_input_conversion(nzb:nzt+1) )
423	ALLOCATE( heatflux_output_conversion(nzb:nzt+1) )
424	ALLOCATE( waterflux_output_conversion(nzb:nzt+1) )
425	ALLOCATE( momentumflux_output_conversion(nzb:nzt+1) )
426
427	!
428	!-- calculate flux conversion factors according to approximation and in-/output mode
429	DO k = nzb, nzt+1
430
431	IF ( TRIM( flux_input_mode ) == 'kinematic' ) THEN
432	heatflux_input_conversion(k) = rho_air_zw(k)
433	waterflux_input_conversion(k) = rho_air_zw(k)
434	momentumflux_input_conversion(k) = rho_air_zw(k)
435	ELSEIF ( TRIM( flux_input_mode ) == 'dynamic' ) THEN
436	heatflux_input_conversion(k) = 1.0_wp / c_p
437	waterflux_input_conversion(k) = 1.0_wp / l_v
438	momentumflux_input_conversion(k) = 1.0_wp
439	ENDIF
440
441	IF ( TRIM( flux_output_mode ) == 'kinematic' ) THEN
442	heatflux_output_conversion(k) = drho_air_zw(k)
443	waterflux_output_conversion(k) = drho_air_zw(k)
444	momentumflux_output_conversion(k) = drho_air_zw(k)
445	ELSEIF ( TRIM( flux_output_mode ) == 'dynamic' ) THEN
446	heatflux_output_conversion(k) = c_p
447	waterflux_output_conversion(k) = l_v
448	momentumflux_output_conversion(k) = 1.0_wp
449	ENDIF
450
451	IF ( .NOT. humidity ) THEN
452	waterflux_input_conversion(k) = 1.0_wp
453	waterflux_output_conversion(k) = 1.0_wp
454	ENDIF
455
456	ENDDO
457
458	!
459	!-- In case of multigrid method, compute grid lengths and grid factors for the
460	!-- grid levels with respective density on each grid
461	IF ( psolver(1:9) == 'multigrid' ) THEN
462
463	ALLOCATE( ddx2_mg(maximum_grid_level) )
464	ALLOCATE( ddy2_mg(maximum_grid_level) )
465	ALLOCATE( dzu_mg(nzb+1:nzt+1,maximum_grid_level) )
466	ALLOCATE( dzw_mg(nzb+1:nzt+1,maximum_grid_level) )
467	ALLOCATE( f1_mg(nzb+1:nzt,maximum_grid_level) )
468	ALLOCATE( f2_mg(nzb+1:nzt,maximum_grid_level) )
469	ALLOCATE( f3_mg(nzb+1:nzt,maximum_grid_level) )
470	ALLOCATE( rho_air_mg(nzb:nzt+1,maximum_grid_level) )
471	ALLOCATE( rho_air_zw_mg(nzb:nzt+1,maximum_grid_level) )
472
473	dzu_mg(:,maximum_grid_level) = dzu
474	rho_air_mg(:,maximum_grid_level) = rho_air
475	!
476	!-- Next line to ensure an equally spaced grid.
477	dzu_mg(1,maximum_grid_level) = dzu(2)
478	rho_air_mg(nzb,maximum_grid_level) = rho_air(nzb) + &
479	(rho_air(nzb) - rho_air(nzb+1))
480
481	dzw_mg(:,maximum_grid_level) = dzw
482	rho_air_zw_mg(:,maximum_grid_level) = rho_air_zw
483	nzt_l = nzt
484	DO l = maximum_grid_level-1, 1, -1
485	dzu_mg(nzb+1,l) = 2.0_wp * dzu_mg(nzb+1,l+1)
486	dzw_mg(nzb+1,l) = 2.0_wp * dzw_mg(nzb+1,l+1)
487	rho_air_mg(nzb,l) = rho_air_mg(nzb,l+1) + (rho_air_mg(nzb,l+1) - rho_air_mg(nzb+1,l+1))
488	rho_air_zw_mg(nzb,l) = rho_air_zw_mg(nzb,l+1) + (rho_air_zw_mg(nzb,l+1) - rho_air_zw_mg(nzb+1,l+1))
489	rho_air_mg(nzb+1,l) = rho_air_mg(nzb+1,l+1)
490	rho_air_zw_mg(nzb+1,l) = rho_air_zw_mg(nzb+1,l+1)
491	nzt_l = nzt_l / 2
492	DO k = 2, nzt_l+1
493	dzu_mg(k,l) = dzu_mg(2k-2,l+1) + dzu_mg(2k-1,l+1)
494	dzw_mg(k,l) = dzw_mg(2k-2,l+1) + dzw_mg(2k-1,l+1)
495	rho_air_mg(k,l) = rho_air_mg(2*k-1,l+1)
496	rho_air_zw_mg(k,l) = rho_air_zw_mg(2*k-1,l+1)
497	ENDDO
498	ENDDO
499
500	nzt_l = nzt
501	dx_l = dx
502	dy_l = dy
503	DO l = maximum_grid_level, 1, -1
504	ddx2_mg(l) = 1.0_wp / dx_l**2
505	ddy2_mg(l) = 1.0_wp / dy_l**2
506	DO k = nzb+1, nzt_l
507	f2_mg(k,l) = rho_air_zw_mg(k,l) / ( dzu_mg(k+1,l) * dzw_mg(k,l) )
508	f3_mg(k,l) = rho_air_zw_mg(k-1,l) / ( dzu_mg(k,l) * dzw_mg(k,l) )
509	f1_mg(k,l) = 2.0_wp * ( ddx2_mg(l) + ddy2_mg(l) ) &
510	* rho_air_mg(k,l) + f2_mg(k,l) + f3_mg(k,l)
511	ENDDO
512	nzt_l = nzt_l / 2
513	dx_l = dx_l * 2.0_wp
514	dy_l = dy_l * 2.0_wp
515	ENDDO
516
517	ENDIF
518
519	!
520	!-- 1D-array for large scale subsidence velocity
521	IF ( .NOT. ALLOCATED( w_subs ) ) THEN
522	ALLOCATE ( w_subs(nzb:nzt+1) )
523	w_subs = 0.0_wp
524	ENDIF
525
526	!
527	!-- Arrays to store velocity data from t-dt and the phase speeds which
528	!-- are needed for radiation boundary conditions
529	IF ( bc_radiation_l ) THEN
530	ALLOCATE( u_m_l(nzb:nzt+1,nysg:nyng,1:2), &
531	v_m_l(nzb:nzt+1,nysg:nyng,0:1), &
532	w_m_l(nzb:nzt+1,nysg:nyng,0:1) )
533	ENDIF
534	IF ( bc_radiation_r ) THEN
535	ALLOCATE( u_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx), &
536	v_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx), &
537	w_m_r(nzb:nzt+1,nysg:nyng,nx-1:nx) )
538	ENDIF
539	IF ( bc_radiation_l .OR. bc_radiation_r ) THEN
540	ALLOCATE( c_u(nzb:nzt+1,nysg:nyng), c_v(nzb:nzt+1,nysg:nyng), &
541	c_w(nzb:nzt+1,nysg:nyng) )
542	ENDIF
543	IF ( bc_radiation_s ) THEN
544	ALLOCATE( u_m_s(nzb:nzt+1,0:1,nxlg:nxrg), &
545	v_m_s(nzb:nzt+1,1:2,nxlg:nxrg), &
546	w_m_s(nzb:nzt+1,0:1,nxlg:nxrg) )
547	ENDIF
548	IF ( bc_radiation_n ) THEN
549	ALLOCATE( u_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg), &
550	v_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg), &
551	w_m_n(nzb:nzt+1,ny-1:ny,nxlg:nxrg) )
552	ENDIF
553	IF ( bc_radiation_s .OR. bc_radiation_n ) THEN
554	ALLOCATE( c_u(nzb:nzt+1,nxlg:nxrg), c_v(nzb:nzt+1,nxlg:nxrg), &
555	c_w(nzb:nzt+1,nxlg:nxrg) )
556	ENDIF
557	IF ( bc_radiation_l .OR. bc_radiation_r .OR. bc_radiation_s .OR. &
558	bc_radiation_n ) THEN
559	ALLOCATE( c_u_m_l(nzb:nzt+1), c_v_m_l(nzb:nzt+1), c_w_m_l(nzb:nzt+1) )
560	ALLOCATE( c_u_m(nzb:nzt+1), c_v_m(nzb:nzt+1), c_w_m(nzb:nzt+1) )
561	ENDIF
562
563	!
564	!-- Initial assignment of the pointers
565	IF ( .NOT. neutral ) THEN
566	pt => pt_1; pt_p => pt_2; tpt_m => pt_3
567	ELSE
568	pt => pt_1; pt_p => pt_1; tpt_m => pt_3
569	ENDIF
570	u => u_1; u_p => u_2; tu_m => u_3
571	v => v_1; v_p => v_2; tv_m => v_3
572	w => w_1; w_p => w_2; tw_m => w_3
573
574	IF ( humidity ) THEN
575	q => q_1; q_p => q_2; tq_m => q_3
576	vpt => vpt_1
577	ENDIF
578
579	IF ( passive_scalar ) THEN
580	s => s_1; s_p => s_2; ts_m => s_3
581	ENDIF
582
583	!
584	!-- Initialize surface arrays
585	CALL init_surface_arrays
586	!
587	!-- Allocate arrays for other modules
588	CALL module_interface_init_arrays
589
590
591	!
592	!-- Allocate arrays containing the RK coefficient for calculation of
593	!-- perturbation pressure and turbulent fluxes. At this point values are
594	!-- set for pressure calculation during initialization (where no timestep
595	!-- is done). Further below the values needed within the timestep scheme
596	!-- will be set.
597	ALLOCATE( weight_substep(1:intermediate_timestep_count_max), &
598	weight_pres(1:intermediate_timestep_count_max) )
599	weight_substep = 1.0_wp
600	weight_pres = 1.0_wp
601	intermediate_timestep_count = 0 ! needed when simulated_time = 0.0
602
603	IF ( debug_output ) CALL debug_message( 'allocating arrays', 'end' )
604
605	!
606	!-- Initialize time series
607	ts_value = 0.0_wp
608
609	!
610	!-- Initialize local summation arrays for routine flow_statistics.
611	!-- This is necessary because they may not yet have been initialized when they
612	!-- are called from flow_statistics (or - depending on the chosen model run -
613	!-- are never initialized)
614	sums_divnew_l = 0.0_wp
615	sums_divold_l = 0.0_wp
616	sums_l_l = 0.0_wp
617	sums_wsts_bc_l = 0.0_wp
618
619	!
620	!-- Initialize model variables
621	IF ( TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
622	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
623	!
624	!-- Initialization with provided input data derived from larger-scale model
625	IF ( INDEX( initializing_actions, 'inifor' ) /= 0 ) THEN
626	IF ( debug_output ) CALL debug_message( 'initializing with INIFOR', 'start' )
627	!
628	!-- Read initial 1D profiles or 3D data from NetCDF file, depending
629	!-- on the provided level-of-detail.
630	!-- At the moment, only u, v, w, pt and q are provided.
631	CALL netcdf_data_input_init_3d
632	!
633	!-- Please note, Inifor provides data from nzb+1 to nzt.
634	!-- Bottom and top boundary conditions for Inifor profiles are already
635	!-- set (just after reading), so that this is not necessary here.
636	!-- Depending on the provided level-of-detail, initial Inifor data is
637	!-- either stored on data type (lod=1), or directly on 3D arrays (lod=2).
638	!-- In order to obtain also initial profiles in case of lod=2 (which
639	!-- is required for e.g. damping), average over 3D data.
640	IF( init_3d%lod_u == 1 ) THEN
641	u_init = init_3d%u_init
642	ELSEIF( init_3d%lod_u == 2 ) THEN
643	ALLOCATE( init_l(nzb:nzt+1) )
644	DO k = nzb, nzt+1
645	init_l(k) = SUM( u(k,nys:nyn,nxl:nxr) )
646	ENDDO
647	init_l = init_l / REAL( ( nx + 1 ) * ( ny + 1 ), KIND = wp )
648
649	#if defined( __parallel )
650	CALL MPI_ALLREDUCE( init_l, u_init, nzt+1-nzb+1, &
651	MPI_REAL, MPI_SUM, comm2d, ierr )
652	#else
653	u_init = init_l
654	#endif
655	DEALLOCATE( init_l )
656
657	ENDIF
658
659	IF( init_3d%lod_v == 1 ) THEN
660	v_init = init_3d%v_init
661	ELSEIF( init_3d%lod_v == 2 ) THEN
662	ALLOCATE( init_l(nzb:nzt+1) )
663	DO k = nzb, nzt+1
664	init_l(k) = SUM( v(k,nys:nyn,nxl:nxr) )
665	ENDDO
666	init_l = init_l / REAL( ( nx + 1 ) * ( ny + 1 ), KIND = wp )
667
668	#if defined( __parallel )
669	CALL MPI_ALLREDUCE( init_l, v_init, nzt+1-nzb+1, &
670	MPI_REAL, MPI_SUM, comm2d, ierr )
671	#else
672	v_init = init_l
673	#endif
674	DEALLOCATE( init_l )
675	ENDIF
676	IF( .NOT. neutral ) THEN
677	IF( init_3d%lod_pt == 1 ) THEN
678	pt_init = init_3d%pt_init
679	ELSEIF( init_3d%lod_pt == 2 ) THEN
680	ALLOCATE( init_l(nzb:nzt+1) )
681	DO k = nzb, nzt+1
682	init_l(k) = SUM( pt(k,nys:nyn,nxl:nxr) )
683	ENDDO
684	init_l = init_l / REAL( ( nx + 1 ) * ( ny + 1 ), KIND = wp )
685
686	#if defined( __parallel )
687	CALL MPI_ALLREDUCE( init_l, pt_init, nzt+1-nzb+1, &
688	MPI_REAL, MPI_SUM, comm2d, ierr )
689	#else
690	pt_init = init_l
691	#endif
692	DEALLOCATE( init_l )
693	ENDIF
694	ENDIF
695
696
697	IF( humidity ) THEN
698	IF( init_3d%lod_q == 1 ) THEN
699	q_init = init_3d%q_init
700	ELSEIF( init_3d%lod_q == 2 ) THEN
701	ALLOCATE( init_l(nzb:nzt+1) )
702	DO k = nzb, nzt+1
703	init_l(k) = SUM( q(k,nys:nyn,nxl:nxr) )
704	ENDDO
705	init_l = init_l / REAL( ( nx + 1 ) * ( ny + 1 ), KIND = wp )
706
707	#if defined( __parallel )
708	CALL MPI_ALLREDUCE( init_l, q_init, nzt+1-nzb+1, &
709	MPI_REAL, MPI_SUM, comm2d, ierr )
710	#else
711	q_init = init_l
712	#endif
713	DEALLOCATE( init_l )
714	ENDIF
715	ENDIF
716
717	!
718	!-- Write initial profiles onto 3D arrays.
719	!-- Work-around, 3D initialization of u,v,w creates artificial
720	!-- structures wich correlate with the processor grid. The reason
721	!-- for this is still unknown. To work-around this, 3D initialization
722	!-- will be effectively reduce to a 1D initialization where no such
723	!-- artificial structures appear.
724	DO i = nxlg, nxrg
725	DO j = nysg, nyng
726	IF( init_3d%lod_u == 1 .OR. init_3d%lod_u == 2 ) &
727	u(:,j,i) = u_init(:)
728	IF( init_3d%lod_v == 1 .OR. init_3d%lod_u == 2 ) &
729	v(:,j,i) = v_init(:)
730	IF( .NOT. neutral .AND. &
731	( init_3d%lod_pt == 1 .OR. init_3d%lod_pt == 2 ) ) &
732	pt(:,j,i) = pt_init(:)
733	IF( humidity .AND. &
734	( init_3d%lod_q == 1 .OR. init_3d%lod_q == 2 ) ) &
735	q(:,j,i) = q_init(:)
736	ENDDO
737	ENDDO
738	!
739	!-- Set geostrophic wind components.
740	IF ( init_3d%from_file_ug ) THEN
741	ug(:) = init_3d%ug_init(:)
742	ENDIF
743	IF ( init_3d%from_file_vg ) THEN
744	vg(:) = init_3d%vg_init(:)
745	ENDIF
746	!
747	!-- Set bottom and top boundary condition for geostrophic wind
748	ug(nzt+1) = ug(nzt)
749	vg(nzt+1) = vg(nzt)
750	ug(nzb) = ug(nzb+1)
751	vg(nzb) = vg(nzb+1)
752	!
753	!-- Set inital w to 0
754	w = 0.0_wp
755
756	IF ( passive_scalar ) THEN
757	DO i = nxlg, nxrg
758	DO j = nysg, nyng
759	s(:,j,i) = s_init
760	ENDDO
761	ENDDO
762	ENDIF
763
764	!
765	!-- Set velocity components at non-atmospheric / oceanic grid points to
766	!-- zero.
767	u = MERGE( u, 0.0_wp, BTEST( wall_flags_0, 1 ) )
768	v = MERGE( v, 0.0_wp, BTEST( wall_flags_0, 2 ) )
769	w = MERGE( w, 0.0_wp, BTEST( wall_flags_0, 3 ) )
770	!
771	!-- Initialize surface variables, e.g. friction velocity, momentum
772	!-- fluxes, etc.
773	CALL init_surfaces
774
775	IF ( debug_output ) CALL debug_message( 'initializing with INIFOR', 'end' )
776	!
777	!-- Initialization via computed 1D-model profiles
778	ELSEIF ( INDEX( initializing_actions, 'set_1d-model_profiles' ) /= 0 ) THEN
779
780	IF ( debug_output ) CALL debug_message( 'initializing with 1D model profiles', 'start' )
781	!
782	!-- Use solutions of the 1D model as initial profiles,
783	!-- start 1D model
784	CALL init_1d_model
785	!
786	!-- Transfer initial profiles to the arrays of the 3D model
787	DO i = nxlg, nxrg
788	DO j = nysg, nyng
789	pt(:,j,i) = pt_init
790	u(:,j,i) = u1d
791	v(:,j,i) = v1d
792	ENDDO
793	ENDDO
794
795	IF ( humidity ) THEN
796	DO i = nxlg, nxrg
797	DO j = nysg, nyng
798	q(:,j,i) = q_init
799	ENDDO
800	ENDDO
801	ENDIF
802
803	IF ( passive_scalar ) THEN
804	DO i = nxlg, nxrg
805	DO j = nysg, nyng
806	s(:,j,i) = s_init
807	ENDDO
808	ENDDO
809	ENDIF
810	!
811	!-- Store initial profiles for output purposes etc.
812	IF ( .NOT. constant_diffusion ) THEN
813	hom(:,1,25,:) = SPREAD( l1d, 2, statistic_regions+1 )
814	ENDIF
815	!
816	!-- Set velocities back to zero
817	u = MERGE( u, 0.0_wp, BTEST( wall_flags_0, 1 ) )
818	v = MERGE( v, 0.0_wp, BTEST( wall_flags_0, 2 ) )
819	!
820	!-- WARNING: The extra boundary conditions set after running the
821	!-- ------- 1D model impose an error on the divergence one layer
822	!-- below the topography; need to correct later
823	!-- ATTENTION: Provisional correction for Piacsek & Williams
824	!-- --------- advection scheme: keep u and v zero one layer below
825	!-- the topography.
826	IF ( ibc_uv_b == 1 ) THEN
827	!
828	!-- Neumann condition
829	DO i = nxl-1, nxr+1
830	DO j = nys-1, nyn+1
831	u(nzb,j,i) = u(nzb+1,j,i)
832	v(nzb,j,i) = v(nzb+1,j,i)
833	ENDDO
834	ENDDO
835
836	ENDIF
837	!
838	!-- Initialize surface variables, e.g. friction velocity, momentum
839	!-- fluxes, etc.
840	CALL init_surfaces
841
842	IF ( debug_output ) CALL debug_message( 'initializing with 1D model profiles', 'end' )
843
844	ELSEIF ( INDEX(initializing_actions, 'set_constant_profiles') /= 0 ) &
845	THEN
846
847	IF ( debug_output ) CALL debug_message( 'initializing with constant profiles', 'start' )
848
849	!
850	!-- Use constructed initial profiles (velocity constant with height,
851	!-- temperature profile with constant gradient)
852	DO i = nxlg, nxrg
853	DO j = nysg, nyng
854	pt(:,j,i) = pt_init
855	u(:,j,i) = u_init
856	v(:,j,i) = v_init
857	ENDDO
858	ENDDO
859	!
860	!-- Mask topography
861	u = MERGE( u, 0.0_wp, BTEST( wall_flags_0, 1 ) )
862	v = MERGE( v, 0.0_wp, BTEST( wall_flags_0, 2 ) )
863	!
864	!-- Set initial horizontal velocities at the lowest computational grid
865	!-- levels to zero in order to avoid too small time steps caused by the
866	!-- diffusion limit in the initial phase of a run (at k=1, dz/2 occurs
867	!-- in the limiting formula!).
868	!-- Please note, in case land- or urban-surface model is used and a
869	!-- spinup is applied, masking the lowest computational level is not
870	!-- possible as MOST as well as energy-balance parametrizations will not
871	!-- work with zero wind velocity.
872	IF ( ibc_uv_b /= 1 .AND. .NOT. spinup ) THEN
873	DO i = nxlg, nxrg
874	DO j = nysg, nyng
875	DO k = nzb, nzt
876	u(k,j,i) = MERGE( u(k,j,i), 0.0_wp, &
877	BTEST( wall_flags_0(k,j,i), 20 ) )
878	v(k,j,i) = MERGE( v(k,j,i), 0.0_wp, &
879	BTEST( wall_flags_0(k,j,i), 21 ) )
880	ENDDO
881	ENDDO
882	ENDDO
883	ENDIF
884
885	IF ( humidity ) THEN
886	DO i = nxlg, nxrg
887	DO j = nysg, nyng
888	q(:,j,i) = q_init
889	ENDDO
890	ENDDO
891	ENDIF
892
893	IF ( passive_scalar ) THEN
894	DO i = nxlg, nxrg
895	DO j = nysg, nyng
896	s(:,j,i) = s_init
897	ENDDO
898	ENDDO
899	ENDIF
900
901	!
902	!-- Compute initial temperature field and other constants used in case
903	!-- of a sloping surface
904	IF ( sloping_surface ) CALL init_slope
905	!
906	!-- Initialize surface variables, e.g. friction velocity, momentum
907	!-- fluxes, etc.
908	CALL init_surfaces
909
910	IF ( debug_output ) CALL debug_message( 'initializing with constant profiles', 'end' )
911
912	ELSEIF ( INDEX(initializing_actions, 'by_user') /= 0 ) &
913	THEN
914
915	IF ( debug_output ) CALL debug_message( 'initializing by user', 'start' )
916	!
917	!-- Pre-initialize surface variables, i.e. setting start- and end-indices
918	!-- at each (j,i)-location. Please note, this does not supersede
919	!-- user-defined initialization of surface quantities.
920	CALL init_surfaces
921	!
922	!-- Initialization will completely be done by the user
923	CALL user_init_3d_model
924
925	IF ( debug_output ) CALL debug_message( 'initializing by user', 'end' )
926
927	ENDIF
928
929	IF ( debug_output ) CALL debug_message( 'initializing statistics, boundary conditions, etc.', 'start' )
930
931	!
932	!-- Bottom boundary
933	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2 ) THEN
934	u(nzb,:,:) = 0.0_wp
935	v(nzb,:,:) = 0.0_wp
936	ENDIF
937
938	!
939	!-- Apply channel flow boundary condition
940	IF ( TRIM( bc_uv_t ) == 'dirichlet_0' ) THEN
941	u(nzt+1,:,:) = 0.0_wp
942	v(nzt+1,:,:) = 0.0_wp
943	ENDIF
944
945	!
946	!-- Calculate virtual potential temperature
947	IF ( humidity ) vpt = pt * ( 1.0_wp + 0.61_wp * q )
948
949	!
950	!-- Store initial profiles for output purposes etc.. Please note, in case of
951	!-- initialization of u, v, w, pt, and q via output data derived from larger
952	!-- scale models, data will not be horizontally homogeneous. Actually, a mean
953	!-- profile should be calculated before.
954	hom(:,1,5,:) = SPREAD( u(:,nys,nxl), 2, statistic_regions+1 )
955	hom(:,1,6,:) = SPREAD( v(:,nys,nxl), 2, statistic_regions+1 )
956	IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2) THEN
957	hom(nzb,1,5,:) = 0.0_wp
958	hom(nzb,1,6,:) = 0.0_wp
959	ENDIF
960	hom(:,1,7,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
961
962	IF ( humidity ) THEN
963	!
964	!-- Store initial profile of total water content, virtual potential
965	!-- temperature
966	hom(:,1,26,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
967	hom(:,1,29,:) = SPREAD( vpt(:,nys,nxl), 2, statistic_regions+1 )
968	!
969	!-- Store initial profile of mixing ratio and potential
970	!-- temperature
971	IF ( bulk_cloud_model .OR. cloud_droplets ) THEN
972	hom(:,1,27,:) = SPREAD( q(:,nys,nxl), 2, statistic_regions+1 )
973	hom(:,1,28,:) = SPREAD( pt(:,nys,nxl), 2, statistic_regions+1 )
974	ENDIF
975	ENDIF
976
977	!
978	!-- Store initial scalar profile
979	IF ( passive_scalar ) THEN
980	hom(:,1,121,:) = SPREAD( s(:,nys,nxl), 2, statistic_regions+1 )
981	ENDIF
982
983	!
984	!-- Initialize the random number generators (from numerical recipes)
985	CALL random_function_ini
986
987	IF ( random_generator == 'random-parallel' ) THEN
988	CALL init_parallel_random_generator( nx, nys, nyn, nxl, nxr )
989	ENDIF
990	!
991	!-- Set the reference state to be used in the buoyancy terms (for ocean runs
992	!-- the reference state will be set (overwritten) in init_ocean)
993	IF ( use_single_reference_value ) THEN
994	IF ( .NOT. humidity ) THEN
995	ref_state(:) = pt_reference
996	ELSE
997	ref_state(:) = vpt_reference
998	ENDIF
999	ELSE
1000	IF ( .NOT. humidity ) THEN
1001	ref_state(:) = pt_init(:)
1002	ELSE
1003	ref_state(:) = vpt(:,nys,nxl)
1004	ENDIF
1005	ENDIF
1006
1007	!
1008	!-- For the moment, vertical velocity is zero
1009	w = 0.0_wp
1010
1011	!
1012	!-- Initialize array sums (must be defined in first call of pres)
1013	sums = 0.0_wp
1014
1015	!
1016	!-- In case of iterative solvers, p must get an initial value
1017	IF ( psolver(1:9) == 'multigrid' .OR. psolver == 'sor' ) p = 0.0_wp
1018	!
1019	!-- Impose vortex with vertical axis on the initial velocity profile
1020	IF ( INDEX( initializing_actions, 'initialize_vortex' ) /= 0 ) THEN
1021	CALL init_rankine
1022	ENDIF
1023
1024	!
1025	!-- Impose temperature anomaly (advection test only) or warm air bubble
1026	!-- close to surface
1027	IF ( INDEX( initializing_actions, 'initialize_ptanom' ) /= 0 .OR. &
1028	INDEX( initializing_actions, 'initialize_bubble' ) /= 0 ) THEN
1029	CALL init_pt_anomaly
1030	ENDIF
1031
1032	!
1033	!-- If required, change the surface temperature at the start of the 3D run
1034	IF ( pt_surface_initial_change /= 0.0_wp ) THEN
1035	pt(nzb,:,:) = pt(nzb,:,:) + pt_surface_initial_change
1036	ENDIF
1037
1038	!
1039	!-- If required, change the surface humidity/scalar at the start of the 3D
1040	!-- run
1041	IF ( humidity .AND. q_surface_initial_change /= 0.0_wp ) &
1042	q(nzb,:,:) = q(nzb,:,:) + q_surface_initial_change
1043
1044	IF ( passive_scalar .AND. s_surface_initial_change /= 0.0_wp ) &
1045	s(nzb,:,:) = s(nzb,:,:) + s_surface_initial_change
1046
1047
1048	!
1049	!-- Initialize old and new time levels.
1050	tpt_m = 0.0_wp; tu_m = 0.0_wp; tv_m = 0.0_wp; tw_m = 0.0_wp
1051	pt_p = pt; u_p = u; v_p = v; w_p = w
1052
1053	IF ( humidity ) THEN
1054	tq_m = 0.0_wp
1055	q_p = q
1056	ENDIF
1057
1058	IF ( passive_scalar ) THEN
1059	ts_m = 0.0_wp
1060	s_p = s
1061	ENDIF
1062
1063	IF ( debug_output ) CALL debug_message( 'initializing statistics, boundary conditions, etc.', 'end' )
1064
1065	ELSEIF ( TRIM( initializing_actions ) == 'read_restart_data' .OR. &
1066	TRIM( initializing_actions ) == 'cyclic_fill' ) &
1067	THEN
1068
1069	IF ( debug_output ) CALL debug_message( 'initializing in case of restart / cyclic_fill', 'start' )
1070	!
1071	!-- Initialize surface elements and its attributes, e.g. heat- and
1072	!-- momentumfluxes, roughness, scaling parameters. As number of surface
1073	!-- elements might be different between runs, e.g. in case of cyclic fill,
1074	!-- and not all surface elements are read, surface elements need to be
1075	!-- initialized before.
1076	!-- Please note, in case of cyclic fill, surfaces should be initialized
1077	!-- after restart data is read, else, individual settings of surface
1078	!-- parameters will be overwritten from data of precursor run, hence,
1079	!-- init_surfaces is called a second time after reading the restart data.
1080	CALL init_surfaces
1081	!
1082	!-- When reading data for cyclic fill of 3D prerun data files, read
1083	!-- some of the global variables from the restart file which are required
1084	!-- for initializing the inflow
1085	IF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1086
1087	DO i = 0, io_blocks-1
1088	IF ( i == io_group ) THEN
1089	CALL rrd_read_parts_of_global
1090	ENDIF
1091	#if defined( __parallel )
1092	CALL MPI_BARRIER( comm2d, ierr )
1093	#endif
1094	ENDDO
1095
1096	ENDIF
1097
1098	!
1099	!-- Read processor specific binary data from restart file
1100	DO i = 0, io_blocks-1
1101	IF ( i == io_group ) THEN
1102	CALL rrd_local
1103	ENDIF
1104	#if defined( __parallel )
1105	CALL MPI_BARRIER( comm2d, ierr )
1106	#endif
1107	ENDDO
1108	!
1109	!-- In case of cyclic fill, call init_surfaces a second time, so that
1110	!-- surface properties such as heat fluxes are initialized as prescribed.
1111	IF ( TRIM( initializing_actions ) == 'cyclic_fill' ) &
1112	CALL init_surfaces
1113
1114	!
1115	!-- In case of complex terrain and cyclic fill method as initialization,
1116	!-- shift initial data in the vertical direction for each point in the
1117	!-- x-y-plane depending on local surface height
1118	IF ( complex_terrain .AND. &
1119	TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1120	DO i = nxlg, nxrg
1121	DO j = nysg, nyng
1122	nz_u_shift = topo_top_ind(j,i,1)
1123	nz_v_shift = topo_top_ind(j,i,2)
1124	nz_w_shift = topo_top_ind(j,i,3)
1125	nz_s_shift = topo_top_ind(j,i,0)
1126
1127	u(nz_u_shift:nzt+1,j,i) = u(0:nzt+1-nz_u_shift,j,i)
1128
1129	v(nz_v_shift:nzt+1,j,i) = v(0:nzt+1-nz_v_shift,j,i)
1130
1131	w(nz_w_shift:nzt+1,j,i) = w(0:nzt+1-nz_w_shift,j,i)
1132
1133	p(nz_s_shift:nzt+1,j,i) = p(0:nzt+1-nz_s_shift,j,i)
1134	pt(nz_s_shift:nzt+1,j,i) = pt(0:nzt+1-nz_s_shift,j,i)
1135	ENDDO
1136	ENDDO
1137	ENDIF
1138	!
1139	!-- Initialization of the turbulence recycling method
1140	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. &
1141	turbulent_inflow ) THEN
1142	!
1143	!-- First store the profiles to be used at the inflow.
1144	!-- These profiles are the (temporally) and horizontally averaged vertical
1145	!-- profiles from the prerun. Alternatively, prescribed profiles
1146	!-- for u,v-components can be used.
1147	!-- Overwrite u_init, v_init, pt_init, q_init and s_init with the
1148	!-- (temporally) and horizontally averaged vertical profiles from the end
1149	!-- of the prerun, because these profiles shall be used as the basic state
1150	!-- for the rayleigh damping and the pt_damping.
1151	ALLOCATE( mean_inflow_profiles(nzb:nzt+1,1:num_mean_inflow_profiles) )
1152
1153	IF ( use_prescribed_profile_data ) THEN
1154	mean_inflow_profiles(:,1) = u_init ! u
1155	mean_inflow_profiles(:,2) = v_init ! v
1156	ELSE
1157	mean_inflow_profiles(:,1) = hom_sum(:,1,0) ! u
1158	u_init(:) = hom_sum(:,1,0)
1159	mean_inflow_profiles(:,2) = hom_sum(:,2,0) ! v
1160	v_init(:) = hom_sum(:,2,0)
1161	ENDIF
1162	mean_inflow_profiles(:,4) = hom_sum(:,4,0) ! pt
1163	pt_init(:) = hom_sum(:,4,0)
1164	IF ( humidity ) &
1165	mean_inflow_profiles(:,6) = hom_sum(:,41,0) ! q
1166	q_init(:) = hom_sum(:,41,0)
1167	IF ( passive_scalar ) &
1168	mean_inflow_profiles(:,7) = hom_sum(:,115,0) ! s
1169	s_init(:) = hom_sum(:,115,0)
1170	!
1171	!-- In case of complex terrain, determine vertical displacement at inflow
1172	!-- boundary and adjust mean inflow profiles
1173	IF ( complex_terrain ) THEN
1174	IF ( nxlg <= 0 .AND. nxrg >= 0 .AND. nysg <= 0 .AND. nyng >= 0 ) THEN
1175	nz_u_shift_l = topo_top_ind(j,i,1)
1176	nz_v_shift_l = topo_top_ind(j,i,2)
1177	nz_w_shift_l = topo_top_ind(j,i,3)
1178	nz_s_shift_l = topo_top_ind(j,i,0)
1179	ELSE
1180	nz_u_shift_l = 0
1181	nz_v_shift_l = 0
1182	nz_w_shift_l = 0
1183	nz_s_shift_l = 0
1184	ENDIF
1185
1186	#if defined( __parallel )
1187	CALL MPI_ALLREDUCE(nz_u_shift_l, nz_u_shift, 1, MPI_INTEGER, &
1188	MPI_MAX, comm2d, ierr)
1189	CALL MPI_ALLREDUCE(nz_v_shift_l, nz_v_shift, 1, MPI_INTEGER, &
1190	MPI_MAX, comm2d, ierr)
1191	CALL MPI_ALLREDUCE(nz_w_shift_l, nz_w_shift, 1, MPI_INTEGER, &
1192	MPI_MAX, comm2d, ierr)
1193	CALL MPI_ALLREDUCE(nz_s_shift_l, nz_s_shift, 1, MPI_INTEGER, &
1194	MPI_MAX, comm2d, ierr)
1195	#else
1196	nz_u_shift = nz_u_shift_l
1197	nz_v_shift = nz_v_shift_l
1198	nz_w_shift = nz_w_shift_l
1199	nz_s_shift = nz_s_shift_l
1200	#endif
1201
1202	mean_inflow_profiles(:,1) = 0.0_wp
1203	mean_inflow_profiles(nz_u_shift:nzt+1,1) = hom_sum(0:nzt+1-nz_u_shift,1,0) ! u
1204
1205	mean_inflow_profiles(:,2) = 0.0_wp
1206	mean_inflow_profiles(nz_v_shift:nzt+1,2) = hom_sum(0:nzt+1-nz_v_shift,2,0) ! v
1207
1208	mean_inflow_profiles(nz_s_shift:nzt+1,4) = hom_sum(0:nzt+1-nz_s_shift,4,0) ! pt
1209
1210	ENDIF
1211
1212	!
1213	!-- If necessary, adjust the horizontal flow field to the prescribed
1214	!-- profiles
1215	IF ( use_prescribed_profile_data ) THEN
1216	DO i = nxlg, nxrg
1217	DO j = nysg, nyng
1218	DO k = nzb, nzt+1
1219	u(k,j,i) = u(k,j,i) - hom_sum(k,1,0) + u_init(k)
1220	v(k,j,i) = v(k,j,i) - hom_sum(k,2,0) + v_init(k)
1221	ENDDO
1222	ENDDO
1223	ENDDO
1224	ENDIF
1225
1226	!
1227	!-- Use these mean profiles at the inflow (provided that Dirichlet
1228	!-- conditions are used)
1229	IF ( bc_dirichlet_l ) THEN
1230	DO j = nysg, nyng
1231	DO k = nzb, nzt+1
1232	u(k,j,nxlg:-1) = mean_inflow_profiles(k,1)
1233	v(k,j,nxlg:-1) = mean_inflow_profiles(k,2)
1234	w(k,j,nxlg:-1) = 0.0_wp
1235	pt(k,j,nxlg:-1) = mean_inflow_profiles(k,4)
1236	IF ( humidity ) &
1237	q(k,j,nxlg:-1) = mean_inflow_profiles(k,6)
1238	IF ( passive_scalar ) &
1239	s(k,j,nxlg:-1) = mean_inflow_profiles(k,7)
1240	ENDDO
1241	ENDDO
1242	ENDIF
1243
1244	!
1245	!-- Calculate the damping factors to be used at the inflow. For a
1246	!-- turbulent inflow the turbulent fluctuations have to be limited
1247	!-- vertically because otherwise the turbulent inflow layer will grow
1248	!-- in time.
1249	IF ( inflow_damping_height == 9999999.9_wp ) THEN
1250	!
1251	!-- Default: use the inversion height calculated by the prerun; if
1252	!-- this is zero, inflow_damping_height must be explicitly
1253	!-- specified.
1254	IF ( hom_sum(nzb+6,pr_palm,0) /= 0.0_wp ) THEN
1255	inflow_damping_height = hom_sum(nzb+6,pr_palm,0)
1256	ELSE
1257	WRITE( message_string, * ) 'inflow_damping_height must be ', &
1258	'explicitly specified because&the inversion height ', &
1259	'calculated by the prerun is zero.'
1260	CALL message( 'init_3d_model', 'PA0318', 1, 2, 0, 6, 0 )
1261	ENDIF
1262
1263	ENDIF
1264
1265	IF ( inflow_damping_width == 9999999.9_wp ) THEN
1266	!
1267	!-- Default for the transition range: one tenth of the undamped
1268	!-- layer
1269	inflow_damping_width = 0.1_wp * inflow_damping_height
1270
1271	ENDIF
1272
1273	ALLOCATE( inflow_damping_factor(nzb:nzt+1) )
1274
1275	DO k = nzb, nzt+1
1276
1277	IF ( zu(k) <= inflow_damping_height ) THEN
1278	inflow_damping_factor(k) = 1.0_wp
1279	ELSEIF ( zu(k) <= ( inflow_damping_height + inflow_damping_width ) ) THEN
1280	inflow_damping_factor(k) = 1.0_wp - &
1281	( zu(k) - inflow_damping_height ) / &
1282	inflow_damping_width
1283	ELSE
1284	inflow_damping_factor(k) = 0.0_wp
1285	ENDIF
1286
1287	ENDDO
1288
1289	ENDIF
1290
1291	!
1292	!-- Inside buildings set velocities back to zero
1293	IF ( TRIM( initializing_actions ) == 'cyclic_fill' .AND. &
1294	topography /= 'flat' ) THEN
1295	!
1296	!-- Inside buildings set velocities back to zero.
1297	!-- Other scalars (pt, q, s, p, sa, ...) are ignored at present,
1298	!-- maybe revise later.
1299	DO i = nxlg, nxrg
1300	DO j = nysg, nyng
1301	DO k = nzb, nzt
1302	u(k,j,i) = MERGE( u(k,j,i), 0.0_wp, &
1303	BTEST( wall_flags_0(k,j,i), 1 ) )
1304	v(k,j,i) = MERGE( v(k,j,i), 0.0_wp, &
1305	BTEST( wall_flags_0(k,j,i), 2 ) )
1306	w(k,j,i) = MERGE( w(k,j,i), 0.0_wp, &
1307	BTEST( wall_flags_0(k,j,i), 3 ) )
1308	ENDDO
1309	ENDDO
1310	ENDDO
1311
1312	ENDIF
1313
1314	!
1315	!-- Calculate initial temperature field and other constants used in case
1316	!-- of a sloping surface
1317	IF ( sloping_surface ) CALL init_slope
1318
1319	!
1320	!-- Initialize new time levels (only done in order to set boundary values
1321	!-- including ghost points)
1322	pt_p = pt; u_p = u; v_p = v; w_p = w
1323	IF ( humidity ) THEN
1324	q_p = q
1325	ENDIF
1326	IF ( passive_scalar ) s_p = s
1327	!
1328	!-- Allthough tendency arrays are set in prognostic_equations, they have
1329	!-- have to be predefined here because they are used (but multiplied with 0)
1330	!-- there before they are set.
1331	tpt_m = 0.0_wp; tu_m = 0.0_wp; tv_m = 0.0_wp; tw_m = 0.0_wp
1332	IF ( humidity ) THEN
1333	tq_m = 0.0_wp
1334	ENDIF
1335	IF ( passive_scalar ) ts_m = 0.0_wp
1336
1337	IF ( debug_output ) CALL debug_message( 'initializing in case of restart / cyclic_fill', 'end' )
1338
1339	ELSE
1340	!
1341	!-- Actually this part of the programm should not be reached
1342	message_string = 'unknown initializing problem'
1343	CALL message( 'init_3d_model', 'PA0193', 1, 2, 0, 6, 0 )
1344	ENDIF
1345
1346
1347	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1348	!
1349	!-- Initialize old timelevels needed for radiation boundary conditions
1350	IF ( bc_radiation_l ) THEN
1351	u_m_l(:,:,:) = u(:,:,1:2)
1352	v_m_l(:,:,:) = v(:,:,0:1)
1353	w_m_l(:,:,:) = w(:,:,0:1)
1354	ENDIF
1355	IF ( bc_radiation_r ) THEN
1356	u_m_r(:,:,:) = u(:,:,nx-1:nx)
1357	v_m_r(:,:,:) = v(:,:,nx-1:nx)
1358	w_m_r(:,:,:) = w(:,:,nx-1:nx)
1359	ENDIF
1360	IF ( bc_radiation_s ) THEN
1361	u_m_s(:,:,:) = u(:,0:1,:)
1362	v_m_s(:,:,:) = v(:,1:2,:)
1363	w_m_s(:,:,:) = w(:,0:1,:)
1364	ENDIF
1365	IF ( bc_radiation_n ) THEN
1366	u_m_n(:,:,:) = u(:,ny-1:ny,:)
1367	v_m_n(:,:,:) = v(:,ny-1:ny,:)
1368	w_m_n(:,:,:) = w(:,ny-1:ny,:)
1369	ENDIF
1370
1371	ENDIF
1372
1373	!
1374	!-- Calculate the initial volume flow at the right and north boundary
1375	IF ( conserve_volume_flow ) THEN
1376
1377	IF ( use_prescribed_profile_data ) THEN
1378
1379	volume_flow_initial_l = 0.0_wp
1380	volume_flow_area_l = 0.0_wp
1381
1382	IF ( nxr == nx ) THEN
1383	DO j = nys, nyn
1384	DO k = nzb+1, nzt
1385	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1386	u_init(k) * dzw(k) &
1387	* MERGE( 1.0_wp, 0.0_wp, &
1388	BTEST( wall_flags_0(k,j,nxr), 1 )&
1389	)
1390
1391	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k) &
1392	* MERGE( 1.0_wp, 0.0_wp, &
1393	BTEST( wall_flags_0(k,j,nxr), 1 )&
1394	)
1395	ENDDO
1396	ENDDO
1397	ENDIF
1398
1399	IF ( nyn == ny ) THEN
1400	DO i = nxl, nxr
1401	DO k = nzb+1, nzt
1402	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1403	v_init(k) * dzw(k) &
1404	* MERGE( 1.0_wp, 0.0_wp, &
1405	BTEST( wall_flags_0(k,nyn,i), 2 )&
1406	)
1407	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k) &
1408	* MERGE( 1.0_wp, 0.0_wp, &
1409	BTEST( wall_flags_0(k,nyn,i), 2 )&
1410	)
1411	ENDDO
1412	ENDDO
1413	ENDIF
1414
1415	#if defined( __parallel )
1416	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1417	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1418	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1419	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1420
1421	#else
1422	volume_flow_initial = volume_flow_initial_l
1423	volume_flow_area = volume_flow_area_l
1424	#endif
1425
1426	ELSEIF ( TRIM( initializing_actions ) == 'cyclic_fill' ) THEN
1427
1428	volume_flow_initial_l = 0.0_wp
1429	volume_flow_area_l = 0.0_wp
1430
1431	IF ( nxr == nx ) THEN
1432	DO j = nys, nyn
1433	DO k = nzb+1, nzt
1434	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1435	hom_sum(k,1,0) * dzw(k) &
1436	* MERGE( 1.0_wp, 0.0_wp, &
1437	BTEST( wall_flags_0(k,j,nx), 1 ) &
1438	)
1439	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k) &
1440	* MERGE( 1.0_wp, 0.0_wp, &
1441	BTEST( wall_flags_0(k,j,nx), 1 ) &
1442	)
1443	ENDDO
1444	ENDDO
1445	ENDIF
1446
1447	IF ( nyn == ny ) THEN
1448	DO i = nxl, nxr
1449	DO k = nzb+1, nzt
1450	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1451	hom_sum(k,2,0) * dzw(k) &
1452	* MERGE( 1.0_wp, 0.0_wp, &
1453	BTEST( wall_flags_0(k,ny,i), 2 ) &
1454	)
1455	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k) &
1456	* MERGE( 1.0_wp, 0.0_wp, &
1457	BTEST( wall_flags_0(k,ny,i), 2 ) &
1458	)
1459	ENDDO
1460	ENDDO
1461	ENDIF
1462
1463	#if defined( __parallel )
1464	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1465	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1466	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1467	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1468
1469	#else
1470	volume_flow_initial = volume_flow_initial_l
1471	volume_flow_area = volume_flow_area_l
1472	#endif
1473
1474	ELSEIF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1475
1476	volume_flow_initial_l = 0.0_wp
1477	volume_flow_area_l = 0.0_wp
1478
1479	IF ( nxr == nx ) THEN
1480	DO j = nys, nyn
1481	DO k = nzb+1, nzt
1482	volume_flow_initial_l(1) = volume_flow_initial_l(1) + &
1483	u(k,j,nx) * dzw(k) &
1484	* MERGE( 1.0_wp, 0.0_wp, &
1485	BTEST( wall_flags_0(k,j,nx), 1 ) &
1486	)
1487	volume_flow_area_l(1) = volume_flow_area_l(1) + dzw(k) &
1488	* MERGE( 1.0_wp, 0.0_wp, &
1489	BTEST( wall_flags_0(k,j,nx), 1 ) &
1490	)
1491	ENDDO
1492	ENDDO
1493	ENDIF
1494
1495	IF ( nyn == ny ) THEN
1496	DO i = nxl, nxr
1497	DO k = nzb+1, nzt
1498	volume_flow_initial_l(2) = volume_flow_initial_l(2) + &
1499	v(k,ny,i) * dzw(k) &
1500	* MERGE( 1.0_wp, 0.0_wp, &
1501	BTEST( wall_flags_0(k,ny,i), 2 ) &
1502	)
1503	volume_flow_area_l(2) = volume_flow_area_l(2) + dzw(k) &
1504	* MERGE( 1.0_wp, 0.0_wp, &
1505	BTEST( wall_flags_0(k,ny,i), 2 ) &
1506	)
1507	ENDDO
1508	ENDDO
1509	ENDIF
1510
1511	#if defined( __parallel )
1512	CALL MPI_ALLREDUCE( volume_flow_initial_l(1), volume_flow_initial(1),&
1513	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1514	CALL MPI_ALLREDUCE( volume_flow_area_l(1), volume_flow_area(1), &
1515	2, MPI_REAL, MPI_SUM, comm2d, ierr )
1516
1517	#else
1518	volume_flow_initial = volume_flow_initial_l
1519	volume_flow_area = volume_flow_area_l
1520	#endif
1521
1522	ENDIF
1523
1524	!
1525	!-- In case of 'bulk_velocity' mode, volume_flow_initial is calculated
1526	!-- from u\|v_bulk instead
1527	IF ( TRIM( conserve_volume_flow_mode ) == 'bulk_velocity' ) THEN
1528	volume_flow_initial(1) = u_bulk * volume_flow_area(1)
1529	volume_flow_initial(2) = v_bulk * volume_flow_area(2)
1530	ENDIF
1531
1532	ENDIF
1533	!
1534	!-- In the following, surface properties can be further initialized with
1535	!-- input from static driver file.
1536	!-- At the moment this affects only default surfaces. For example,
1537	!-- roughness length or sensible / latent heat fluxes can be initialized
1538	!-- heterogeneously for default surfaces. Therefore, a generic routine
1539	!-- from netcdf_data_input_mod is called to read a 2D array.
1540	IF ( input_pids_static ) THEN
1541	!
1542	!-- Allocate memory for possible static input
1543	ALLOCATE( tmp_2d%var(nys:nyn,nxl:nxr) )
1544	tmp_2d%var = 0.0_wp
1545	!
1546	!-- Open the static input file
1547	#if defined( __netcdf )
1548	CALL open_read_file( TRIM( input_file_static ) // &
1549	TRIM( coupling_char ), &
1550	pids_id )
1551
1552	CALL inquire_num_variables( pids_id, num_var_pids )
1553	!
1554	!-- Allocate memory to store variable names and read them
1555	ALLOCATE( vars_pids(1:num_var_pids) )
1556	CALL inquire_variable_names( pids_id, vars_pids )
1557	!
1558	!-- Input roughness length.
1559	IF ( check_existence( vars_pids, 'z0' ) ) THEN
1560	!
1561	!-- Read _FillValue attribute
1562	CALL get_attribute( pids_id, char_fill, tmp_2d%fill, &
1563	.FALSE., 'z0' )
1564	!
1565	!-- Read variable
1566	CALL get_variable( pids_id, 'z0', tmp_2d%var, &
1567	nxl, nxr, nys, nyn )
1568	!
1569	!-- Initialize roughness length. Note, z0 will be only initialized at
1570	!-- default-type surfaces. At natural or urban z0 is implicitly
1571	!-- initialized bythe respective parameter lists.
1572	!-- Initialize horizontal surface elements.
1573	CALL init_single_surface_properties( surf_def_h(0)%z0, &
1574	tmp_2d%var, &
1575	surf_def_h(0)%ns, &
1576	tmp_2d%fill, &
1577	surf_def_h(0)%i, &
1578	surf_def_h(0)%j )
1579	!
1580	!-- Initialize roughness also at vertical surface elements.
1581	!-- Note, the actual 2D input arrays are only defined on the
1582	!-- subdomain. Therefore, pass the index arrays with their respective
1583	!-- offset values.
1584	DO l = 0, 3
1585	CALL init_single_surface_properties( &
1586	surf_def_v(l)%z0, &
1587	tmp_2d%var, &
1588	surf_def_v(l)%ns, &
1589	tmp_2d%fill, &
1590	surf_def_v(l)%i + surf_def_v(l)%ioff, &
1591	surf_def_v(l)%j + surf_def_v(l)%joff )
1592	ENDDO
1593
1594	ENDIF
1595	!
1596	!-- Additional variables, e.g. shf, qsws, etc, can be initialized the
1597	!-- same way.
1598
1599	!
1600	!-- Finally, close the input file and deallocate temporary arrays
1601	DEALLOCATE( vars_pids )
1602
1603	CALL close_input_file( pids_id )
1604	#endif
1605	DEALLOCATE( tmp_2d%var )
1606	ENDIF
1607	!
1608	!-- Finally, if random_heatflux is set, disturb shf at horizontal
1609	!-- surfaces. Actually, this should be done in surface_mod, where all other
1610	!-- initializations of surface quantities are done. However, this
1611	!-- would create a ring dependency, hence, it is done here. Maybe delete
1612	!-- disturb_heatflux and tranfer the respective code directly into the
1613	!-- initialization in surface_mod.
1614	IF ( TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
1615	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
1616
1617	IF ( use_surface_fluxes .AND. constant_heatflux .AND. &
1618	random_heatflux ) THEN
1619	IF ( surf_def_h(0)%ns >= 1 ) CALL disturb_heatflux( surf_def_h(0) )
1620	IF ( surf_lsm_h%ns >= 1 ) CALL disturb_heatflux( surf_lsm_h )
1621	IF ( surf_usm_h%ns >= 1 ) CALL disturb_heatflux( surf_usm_h )
1622	ENDIF
1623	ENDIF
1624
1625	!
1626	!-- Compute total sum of grid points and the mean surface level height for each
1627	!-- statistic region. These are mainly used for horizontal averaging of
1628	!-- turbulence statistics.
1629	!-- ngp_2dh: number of grid points of a horizontal cross section through the
1630	!-- respective statistic region
1631	!-- ngp_3d: number of grid points of the respective statistic region
1632	ngp_2dh_outer_l = 0
1633	ngp_2dh_outer = 0
1634	ngp_2dh_s_inner_l = 0
1635	ngp_2dh_s_inner = 0
1636	ngp_2dh_l = 0
1637	ngp_2dh = 0
1638	ngp_3d_inner_l = 0.0_wp
1639	ngp_3d_inner = 0
1640	ngp_3d = 0
1641	ngp_sums = ( nz + 2 ) * ( pr_palm + max_pr_user )
1642
1643	mean_surface_level_height = 0.0_wp
1644	mean_surface_level_height_l = 0.0_wp
1645	!
1646	!-- To do: New concept for these non-topography grid points!
1647	DO sr = 0, statistic_regions
1648	DO i = nxl, nxr
1649	DO j = nys, nyn
1650	IF ( rmask(j,i,sr) == 1.0_wp ) THEN
1651	!
1652	!-- All xy-grid points
1653	ngp_2dh_l(sr) = ngp_2dh_l(sr) + 1
1654	!
1655	!-- Determine mean surface-level height. In case of downward-
1656	!-- facing walls are present, more than one surface level exist.
1657	!-- In this case, use the lowest surface-level height.
1658	IF ( surf_def_h(0)%start_index(j,i) <= &
1659	surf_def_h(0)%end_index(j,i) ) THEN
1660	m = surf_def_h(0)%start_index(j,i)
1661	k = surf_def_h(0)%k(m)
1662	mean_surface_level_height_l(sr) = &
1663	mean_surface_level_height_l(sr) + zw(k-1)
1664	ENDIF
1665	IF ( surf_lsm_h%start_index(j,i) <= &
1666	surf_lsm_h%end_index(j,i) ) THEN
1667	m = surf_lsm_h%start_index(j,i)
1668	k = surf_lsm_h%k(m)
1669	mean_surface_level_height_l(sr) = &
1670	mean_surface_level_height_l(sr) + zw(k-1)
1671	ENDIF
1672	IF ( surf_usm_h%start_index(j,i) <= &
1673	surf_usm_h%end_index(j,i) ) THEN
1674	m = surf_usm_h%start_index(j,i)
1675	k = surf_usm_h%k(m)
1676	mean_surface_level_height_l(sr) = &
1677	mean_surface_level_height_l(sr) + zw(k-1)
1678	ENDIF
1679
1680	k_surf = k - 1
1681
1682	DO k = nzb, nzt+1
1683	!
1684	!-- xy-grid points above topography
1685	ngp_2dh_outer_l(k,sr) = ngp_2dh_outer_l(k,sr) + &
1686	MERGE( 1, 0, BTEST( wall_flags_0(k,j,i), 24 ) )
1687
1688	ngp_2dh_s_inner_l(k,sr) = ngp_2dh_s_inner_l(k,sr) + &
1689	MERGE( 1, 0, BTEST( wall_flags_0(k,j,i), 22 ) )
1690
1691	ENDDO
1692	!
1693	!-- All grid points of the total domain above topography
1694	ngp_3d_inner_l(sr) = ngp_3d_inner_l(sr) + ( nz - k_surf + 2 )
1695
1696
1697
1698	ENDIF
1699	ENDDO
1700	ENDDO
1701	ENDDO
1702
1703	sr = statistic_regions + 1
1704	#if defined( __parallel )
1705	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1706	CALL MPI_ALLREDUCE( ngp_2dh_l(0), ngp_2dh(0), sr, MPI_INTEGER, MPI_SUM, &
1707	comm2d, ierr )
1708	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1709	CALL MPI_ALLREDUCE( ngp_2dh_outer_l(0,0), ngp_2dh_outer(0,0), (nz+2)*sr, &
1710	MPI_INTEGER, MPI_SUM, comm2d, ierr )
1711	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1712	CALL MPI_ALLREDUCE( ngp_2dh_s_inner_l(0,0), ngp_2dh_s_inner(0,0), &
1713	(nz+2)*sr, MPI_INTEGER, MPI_SUM, comm2d, ierr )
1714	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1715	CALL MPI_ALLREDUCE( ngp_3d_inner_l(0), ngp_3d_inner_tmp(0), sr, MPI_REAL, &
1716	MPI_SUM, comm2d, ierr )
1717	ngp_3d_inner = INT( ngp_3d_inner_tmp, KIND = SELECTED_INT_KIND( 18 ) )
1718	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1719	CALL MPI_ALLREDUCE( mean_surface_level_height_l(0), &
1720	mean_surface_level_height(0), sr, MPI_REAL, &
1721	MPI_SUM, comm2d, ierr )
1722	mean_surface_level_height = mean_surface_level_height / REAL( ngp_2dh )
1723	#else
1724	ngp_2dh = ngp_2dh_l
1725	ngp_2dh_outer = ngp_2dh_outer_l
1726	ngp_2dh_s_inner = ngp_2dh_s_inner_l
1727	ngp_3d_inner = INT( ngp_3d_inner_l, KIND = SELECTED_INT_KIND( 18 ) )
1728	mean_surface_level_height = mean_surface_level_height_l / REAL( ngp_2dh_l )
1729	#endif
1730
1731	ngp_3d = INT ( ngp_2dh, KIND = SELECTED_INT_KIND( 18 ) ) * &
1732	INT ( (nz + 2 ), KIND = SELECTED_INT_KIND( 18 ) )
1733
1734	!
1735	!-- Set a lower limit of 1 in order to avoid zero divisions in flow_statistics,
1736	!-- buoyancy, etc. A zero value will occur for cases where all grid points of
1737	!-- the respective subdomain lie below the surface topography
1738	ngp_2dh_outer = MAX( 1, ngp_2dh_outer(:,:) )
1739	ngp_3d_inner = MAX( INT(1, KIND = SELECTED_INT_KIND( 18 )), &
1740	ngp_3d_inner(:) )
1741	ngp_2dh_s_inner = MAX( 1, ngp_2dh_s_inner(:,:) )
1742
1743	DEALLOCATE( mean_surface_level_height_l, ngp_2dh_l, ngp_2dh_outer_l, &
1744	ngp_3d_inner_l, ngp_3d_inner_tmp )
1745	!
1746	!-- Initialize surface forcing corresponding to large-scale forcing. Therein,
1747	!-- initialize heat-fluxes, etc. via datatype. Revise it later!
1748	IF ( large_scale_forcing .AND. lsf_surf ) THEN
1749	IF ( use_surface_fluxes .AND. constant_heatflux ) THEN
1750	CALL ls_forcing_surf ( simulated_time )
1751	ENDIF
1752	ENDIF
1753	!
1754	!-- Initializae 3D offline nesting in COSMO model and read data from
1755	!-- external NetCDF file.
1756	IF ( nesting_offline ) CALL nesting_offl_init
1757	!
1758	!-- Initialize quantities for special advections schemes
1759	CALL init_advec
1760
1761	!
1762	!-- Impose random perturbation on the horizontal velocity field and then
1763	!-- remove the divergences from the velocity field at the initial stage
1764	IF ( create_disturbances .AND. disturbance_energy_limit /= 0.0_wp .AND. &
1765	TRIM( initializing_actions ) /= 'read_restart_data' .AND. &
1766	TRIM( initializing_actions ) /= 'cyclic_fill' ) THEN
1767
1768	IF ( debug_output ) CALL debug_message( 'creating disturbances + applying pressure solver', 'start' )
1769	!
1770	!-- Needed for both disturb_field and pres
1771	!$ACC DATA &
1772	!$ACC CREATE(tend(nzb:nzt+1,nysg:nyng,nxlg:nxrg)) &
1773	!$ACC COPY(u(nzb:nzt+1,nysg:nyng,nxlg:nxrg)) &
1774	!$ACC COPY(v(nzb:nzt+1,nysg:nyng,nxlg:nxrg))
1775
1776	CALL disturb_field( 'u', tend, u )
1777	CALL disturb_field( 'v', tend, v )
1778
1779	!$ACC DATA &
1780	!$ACC CREATE(d(nzb+1:nzt,nys:nyn,nxl:nxr)) &
1781	!$ACC COPY(w(nzb:nzt+1,nysg:nyng,nxlg:nxrg)) &
1782	!$ACC COPY(p(nzb:nzt+1,nysg:nyng,nxlg:nxrg)) &
1783	!$ACC COPYIN(rho_air(nzb:nzt+1), rho_air_zw(nzb:nzt+1)) &
1784	!$ACC COPYIN(ddzu(1:nzt+1), ddzw(1:nzt+1)) &
1785	!$ACC COPYIN(wall_flags_0(nzb:nzt+1,nysg:nyng,nxlg:nxrg)) &
1786	!$ACC COPYIN(bc_h(0:1)) &
1787	!$ACC COPYIN(bc_h(0)%i(1:bc_h(0)%ns)) &
1788	!$ACC COPYIN(bc_h(0)%j(1:bc_h(0)%ns)) &
1789	!$ACC COPYIN(bc_h(0)%k(1:bc_h(0)%ns)) &
1790	!$ACC COPYIN(bc_h(1)%i(1:bc_h(1)%ns)) &
1791	!$ACC COPYIN(bc_h(1)%j(1:bc_h(1)%ns)) &
1792	!$ACC COPYIN(bc_h(1)%k(1:bc_h(1)%ns))
1793
1794	n_sor = nsor_ini
1795	CALL pres
1796	n_sor = nsor
1797
1798	!$ACC END DATA
1799	!$ACC END DATA
1800
1801	IF ( debug_output ) CALL debug_message( 'creating disturbances + applying pressure solver', 'end' )
1802
1803	ENDIF
1804
1805	IF ( .NOT. ocean_mode ) THEN
1806
1807	ALLOCATE( hyp(nzb:nzt+1) )
1808	ALLOCATE( d_exner(nzb:nzt+1) )
1809	ALLOCATE( exner(nzb:nzt+1) )
1810	ALLOCATE( hyrho(nzb:nzt+1) )
1811	!
1812	!-- Check temperature in case of too large domain height
1813	DO k = nzb, nzt+1
1814	IF ( ( pt_surface * exner_function(surface_pressure * 100.0_wp) - g/c_p * zu(k) ) < 0.0_wp ) THEN
1815	WRITE( message_string, * ) 'absolute temperature < 0.0 at zu(', k, &
1816	') = ', zu(k)
1817	CALL message( 'init_3d_model', 'PA0142', 1, 2, 0, 6, 0 )
1818	ENDIF
1819	ENDDO
1820
1821	!
1822	!-- Calculate vertical profile of the hydrostatic pressure (hyp)
1823	hyp = barometric_formula(zu, pt_surface * exner_function(surface_pressure * 100.0_wp), surface_pressure * 100.0_wp)
1824	d_exner = exner_function_invers(hyp)
1825	exner = 1.0_wp / exner_function_invers(hyp)
1826	hyrho = ideal_gas_law_rho_pt(hyp, pt_init)
1827	!
1828	!-- Compute reference density
1829	rho_surface = ideal_gas_law_rho(surface_pressure * 100.0_wp, pt_surface * exner_function(surface_pressure * 100.0_wp))
1830
1831	ENDIF
1832
1833	!
1834	!-- If required, initialize particles
1835	IF ( agents_active ) CALL mas_init
1836	!
1837	!-- Initialization of synthetic turbulence generator
1838	IF ( use_syn_turb_gen ) CALL stg_init
1839	!
1840	!-- Initializing actions for all other modules
1841	CALL module_interface_init
1842	!
1843	!-- Initialize surface layer (done after LSM as roughness length are required
1844	!-- for initialization
1845	IF ( constant_flux_layer ) CALL init_surface_layer_fluxes
1846	!
1847	!-- Initialize surface data output
1848	IF ( surface_output ) CALL surface_data_output_init
1849	!
1850	!-- Initialize the ws-scheme.
1851	IF ( ws_scheme_sca .OR. ws_scheme_mom ) CALL ws_init
1852	!
1853	!-- Perform post-initializing checks for all other modules
1854	CALL module_interface_init_checks
1855
1856	!
1857	!-- Setting weighting factors for calculation of perturbation pressure
1858	!-- and turbulent quantities from the RK substeps
1859	IF ( TRIM(timestep_scheme) == 'runge-kutta-3' ) THEN ! for RK3-method
1860
1861	weight_substep(1) = 1._wp/6._wp
1862	weight_substep(2) = 3._wp/10._wp
1863	weight_substep(3) = 8._wp/15._wp
1864
1865	weight_pres(1) = 1._wp/3._wp
1866	weight_pres(2) = 5._wp/12._wp
1867	weight_pres(3) = 1._wp/4._wp
1868
1869	ELSEIF ( TRIM(timestep_scheme) == 'runge-kutta-2' ) THEN ! for RK2-method
1870
1871	weight_substep(1) = 1._wp/2._wp
1872	weight_substep(2) = 1._wp/2._wp
1873
1874	weight_pres(1) = 1._wp/2._wp
1875	weight_pres(2) = 1._wp/2._wp
1876
1877	ELSE ! for Euler-method
1878
1879	weight_substep(1) = 1.0_wp
1880	weight_pres(1) = 1.0_wp
1881
1882	ENDIF
1883
1884	!
1885	!-- Initialize Rayleigh damping factors
1886	rdf = 0.0_wp
1887	rdf_sc = 0.0_wp
1888	IF ( rayleigh_damping_factor /= 0.0_wp ) THEN
1889
1890	IF ( .NOT. ocean_mode ) THEN
1891	DO k = nzb+1, nzt
1892	IF ( zu(k) >= rayleigh_damping_height ) THEN
1893	rdf(k) = rayleigh_damping_factor * &
1894	( SIN( pi * 0.5_wp * ( zu(k) - rayleigh_damping_height ) &
1895	/ ( zu(nzt) - rayleigh_damping_height ) ) &
1896	)**2
1897	ENDIF
1898	ENDDO
1899	ELSE
1900	!
1901	!-- In ocean mode, rayleigh damping is applied in the lower part of the
1902	!-- model domain
1903	DO k = nzt, nzb+1, -1
1904	IF ( zu(k) <= rayleigh_damping_height ) THEN
1905	rdf(k) = rayleigh_damping_factor * &
1906	( SIN( pi * 0.5_wp * ( rayleigh_damping_height - zu(k) ) &
1907	/ ( rayleigh_damping_height - zu(nzb+1) ) ) &
1908	)**2
1909	ENDIF
1910	ENDDO
1911	ENDIF
1912
1913	ENDIF
1914	IF ( scalar_rayleigh_damping ) rdf_sc = rdf
1915
1916	!
1917	!-- Initialize the starting level and the vertical smoothing factor used for
1918	!-- the external pressure gradient
1919	dp_smooth_factor = 1.0_wp
1920	IF ( dp_external ) THEN
1921	!
1922	!-- Set the starting level dp_level_ind_b only if it has not been set before
1923	!-- (e.g. in init_grid).
1924	IF ( dp_level_ind_b == 0 ) THEN
1925	ind_array = MINLOC( ABS( dp_level_b - zu ) )
1926	dp_level_ind_b = ind_array(1) - 1 + nzb
1927	! MINLOC uses lower array bound 1
1928	ENDIF
1929	IF ( dp_smooth ) THEN
1930	dp_smooth_factor(:dp_level_ind_b) = 0.0_wp
1931	DO k = dp_level_ind_b+1, nzt
1932	dp_smooth_factor(k) = 0.5_wp * ( 1.0_wp + SIN( pi * &
1933	( REAL( k - dp_level_ind_b, KIND=wp ) / &
1934	REAL( nzt - dp_level_ind_b, KIND=wp ) - 0.5_wp ) ) )
1935	ENDDO
1936	ENDIF
1937	ENDIF
1938
1939	!
1940	!-- Initialize damping zone for the potential temperature in case of
1941	!-- non-cyclic lateral boundaries. The damping zone has the maximum value
1942	!-- at the inflow boundary and decreases to zero at pt_damping_width.
1943	ptdf_x = 0.0_wp
1944	ptdf_y = 0.0_wp
1945	IF ( bc_lr_dirrad ) THEN
1946	DO i = nxl, nxr
1947	IF ( ( i * dx ) < pt_damping_width ) THEN
1948	ptdf_x(i) = pt_damping_factor * ( SIN( pi * 0.5_wp * &
1949	REAL( pt_damping_width - i * dx, KIND=wp ) / ( &
1950	REAL( pt_damping_width, KIND=wp ) ) ) )**2
1951	ENDIF
1952	ENDDO
1953	ELSEIF ( bc_lr_raddir ) THEN
1954	DO i = nxl, nxr
1955	IF ( ( i * dx ) > ( nx * dx - pt_damping_width ) ) THEN
1956	ptdf_x(i) = pt_damping_factor * &
1957	SIN( pi * 0.5_wp * &
1958	( ( i - nx ) * dx + pt_damping_width ) / &
1959	REAL( pt_damping_width, KIND=wp ) )**2
1960	ENDIF
1961	ENDDO
1962	ELSEIF ( bc_ns_dirrad ) THEN
1963	DO j = nys, nyn
1964	IF ( ( j * dy ) > ( ny * dy - pt_damping_width ) ) THEN
1965	ptdf_y(j) = pt_damping_factor * &
1966	SIN( pi * 0.5_wp * &
1967	( ( j - ny ) * dy + pt_damping_width ) / &
1968	REAL( pt_damping_width, KIND=wp ) )**2
1969	ENDIF
1970	ENDDO
1971	ELSEIF ( bc_ns_raddir ) THEN
1972	DO j = nys, nyn
1973	IF ( ( j * dy ) < pt_damping_width ) THEN
1974	ptdf_y(j) = pt_damping_factor * &
1975	SIN( pi * 0.5_wp * &
1976	( pt_damping_width - j * dy ) / &
1977	REAL( pt_damping_width, KIND=wp ) )**2
1978	ENDIF
1979	ENDDO
1980	ENDIF
1981
1982	!
1983	!-- Input binary data file is not needed anymore. This line must be placed
1984	!-- after call of user_init!
1985	CALL close_file( 13 )
1986	!
1987	!-- In case of nesting, put an barrier to assure that all parent and child
1988	!-- domains finished initialization.
1989	#if defined( __parallel )
1990	IF ( nested_run ) CALL MPI_BARRIER( MPI_COMM_WORLD, ierr )
1991	#endif
1992
1993
1994	CALL location_message( 'model initialization', 'finished' )
1995
1996	END SUBROUTINE init_3d_model

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