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init_3d_model.f90 @ 4674

Last change on this file since 4674 was 4671, checked in by pavelkrc, 4 years ago

Radiative transfer model RTM version 4.1

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

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source: palm/trunk/SOURCE/init_3d_model.f90 @ 4674

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