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source: palm/trunk/SOURCE/time_integration.f90 @ 2000

Last change on this file since 2000 was 2000, checked in by knoop, 8 years ago
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1	!> @file time_integration.f90
2	!------------------------------------------------------------------------------!
3	! This file is part of PALM.
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 1997-2016 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	! Forced header and separation lines into 80 columns
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: time_integration.f90 2000 2016-08-20 18:09:15Z knoop $
27	!
28	! 1976 2016-07-27 13:28:04Z maronga
29	! Simplified calls to radiation model
30	!
31	! 1960 2016-07-12 16:34:24Z suehring
32	! Separate humidity and passive scalar
33	!
34	! 1957 2016-07-07 10:43:48Z suehring
35	! flight module added
36	!
37	! 1919 2016-05-27 14:51:23Z raasch
38	! Initial version of purely vertical nesting introduced.
39	!
40	! 1918 2016-05-27 14:35:57Z raasch
41	! determination of time step moved to the end of the time step loop,
42	! the first time step is now always calculated before the time step loop (i.e.
43	! also in case of restart runs)
44	!
45	! 1914 2016-05-26 14:44:07Z witha
46	! Added call for wind turbine model
47	!
48	! 1878 2016-04-19 12:30:36Z hellstea
49	! Synchronization for nested runs rewritten
50	!
51	! 1853 2016-04-11 09:00:35Z maronga
52	! Adjusted for use with radiation_scheme = constant
53	!
54	! 1849 2016-04-08 11:33:18Z hoffmann
55	! Adapted for modularization of microphysics
56	!
57	! 1833 2016-04-07 14:23:03Z raasch
58	! spectrum renamed spectra_mod, spectra related variables moved to spectra_mod
59	!
60	! 1831 2016-04-07 13:15:51Z hoffmann
61	! turbulence renamed collision_turbulence
62	!
63	! 1822 2016-04-07 07:49:42Z hoffmann
64	! icloud_scheme replaced by microphysics_*
65	!
66	! 1808 2016-04-05 19:44:00Z raasch
67	! output message in case unscheduled radiation calls removed
68	!
69	! 1797 2016-03-21 16:50:28Z raasch
70	! introduction of different datatransfer modes
71	!
72	! 1791 2016-03-11 10:41:25Z raasch
73	! call of pmci_update_new removed
74	!
75	! 1786 2016-03-08 05:49:27Z raasch
76	! +module spectrum
77	!
78	! 1783 2016-03-06 18:36:17Z raasch
79	! switch back of netcdf data format for mask output moved to the mask output
80	! routine
81	!
82	! 1781 2016-03-03 15:12:23Z raasch
83	! some pmc calls removed at the beginning (before timeloop),
84	! pmc initialization moved to the main program
85	!
86	! 1764 2016-02-28 12:45:19Z raasch
87	! PMC_ACTIVE flags removed,
88	! bugfix: nest synchronization after first call of timestep
89	!
90	! 1762 2016-02-25 12:31:13Z hellstea
91	! Introduction of nested domain feature
92	!
93	! 1736 2015-12-04 08:56:33Z raasch
94	! no perturbations added to total domain if energy limit has been set zero
95	!
96	! 1691 2015-10-26 16:17:44Z maronga
97	! Added option for spin-ups without land surface and radiation models. Moved calls
98	! for radiation and lan surface schemes.
99	!
100	! 1682 2015-10-07 23:56:08Z knoop
101	! Code annotations made doxygen readable
102	!
103	! 1671 2015-09-25 03:29:37Z raasch
104	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
105	! for particles
106	!
107	! 1585 2015-04-30 07:05:52Z maronga
108	! Moved call of radiation scheme. Added support for RRTM
109	!
110	! 1551 2015-03-03 14:18:16Z maronga
111	! Added interface for different radiation schemes.
112	!
113	! 1496 2014-12-02 17:25:50Z maronga
114	! Added calls for the land surface model and radiation scheme
115	!
116	! 1402 2014-05-09 14:25:13Z raasch
117	! location messages modified
118	!
119	! 1384 2014-05-02 14:31:06Z raasch
120	! location messages added
121	!
122	! 1380 2014-04-28 12:40:45Z heinze
123	! CALL of nudge_ref added
124	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
125	!
126	! 1365 2014-04-22 15:03:56Z boeske
127	! Reset sums_ls_l to zero at each timestep
128	! +sums_ls_l
129	! Calculation of reference state (previously in subroutine calc_mean_profile)
130
131	! 1342 2014-03-26 17:04:47Z kanani
132	! REAL constants defined as wp-kind
133	!
134	! 1320 2014-03-20 08:40:49Z raasch
135	! ONLY-attribute added to USE-statements,
136	! kind-parameters added to all INTEGER and REAL declaration statements,
137	! kinds are defined in new module kinds,
138	! old module precision_kind is removed,
139	! revision history before 2012 removed,
140	! comment fields (!:) to be used for variable explanations added to
141	! all variable declaration statements
142	! 1318 2014-03-17 13:35:16Z raasch
143	! module interfaces removed
144	!
145	! 1308 2014-03-13 14:58:42Z fricke
146	! +netcdf_data_format_save
147	! For masked data, parallel netcdf output is not tested so far, hence
148	! netcdf_data_format is switched back to non-paralell output.
149	!
150	! 1276 2014-01-15 13:40:41Z heinze
151	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
152	!
153	! 1257 2013-11-08 15:18:40Z raasch
154	! acc-update-host directive for timestep removed
155	!
156	! 1241 2013-10-30 11:36:58Z heinze
157	! Generalize calc_mean_profile for wider use
158	! Determine shf and qsws in dependence on data from LSF_DATA
159	! Determine ug and vg in dependence on data from LSF_DATA
160	! 1221 2013-09-10 08:59:13Z raasch
161	! host update of arrays before timestep is called
162	!
163	! 1179 2013-06-14 05:57:58Z raasch
164	! mean profiles for reference state are only calculated if required,
165	! small bugfix for background communication
166	!
167	! 1171 2013-05-30 11:27:45Z raasch
168	! split of prognostic_equations deactivated (comment lines), for the time being
169	!
170	! 1128 2013-04-12 06:19:32Z raasch
171	! asynchronous transfer of ghost point data realized for acc-optimized version:
172	! prognostic_equations are first called two times for those points required for
173	! the left-right and north-south exchange, respectively, and then for the
174	! remaining points,
175	! those parts requiring global communication moved from prognostic_equations to
176	! here
177	!
178	! 1115 2013-03-26 18:16:16Z hoffmann
179	! calculation of qr and nr is restricted to precipitation
180	!
181	! 1113 2013-03-10 02:48:14Z raasch
182	! GPU-porting of boundary conditions,
183	! openACC directives updated
184	! formal parameter removed from routine boundary_conds
185	!
186	! 1111 2013-03-08 23:54:10Z raasch
187	! +internal timestep counter for cpu statistics added,
188	! openACC directives updated
189	!
190	! 1092 2013-02-02 11:24:22Z raasch
191	! unused variables removed
192	!
193	! 1065 2012-11-22 17:42:36Z hoffmann
194	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
195	!
196	! 1053 2012-11-13 17:11:03Z hoffmann
197	! exchange of ghost points for nr, qr added
198	!
199	! 1036 2012-10-22 13:43:42Z raasch
200	! code put under GPL (PALM 3.9)
201	!
202	! 1019 2012-09-28 06:46:45Z raasch
203	! non-optimized version of prognostic_equations removed
204	!
205	! 1015 2012-09-27 09:23:24Z raasch
206	! +call of prognostic_equations_acc
207	!
208	! 1001 2012-09-13 14:08:46Z raasch
209	! all actions concerning leapfrog- and upstream-spline-scheme removed
210	!
211	! 849 2012-03-15 10:35:09Z raasch
212	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
213	!
214	! 825 2012-02-19 03:03:44Z raasch
215	! wang_collision_kernel renamed wang_kernel
216	!
217	! Revision 1.1 1997/08/11 06:19:04 raasch
218	! Initial revision
219	!
220	!
221	! Description:
222	! ------------
223	!> Integration in time of the model equations, statistical analysis and graphic
224	!> output
225	!------------------------------------------------------------------------------!
226	SUBROUTINE time_integration
227
228
229	USE advec_ws, &
230	ONLY: ws_statistics
231
232	USE arrays_3d, &
233	ONLY: diss, dzu, e, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, &
234	ql, ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, s, s_p, sa_p, &
235	tend, u, u_p, v, vpt, v_p, w, w_p
236
237	USE calc_mean_profile_mod, &
238	ONLY: calc_mean_profile
239
240	USE control_parameters, &
241	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
242	averaging_interval, averaging_interval_pr, &
243	bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
244	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
245	cloud_physics, constant_flux_layer, constant_heatflux, &
246	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
247	coupling_start_time, current_timestep_number, &
248	disturbance_created, disturbance_energy_limit, dist_range, &
249	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
250	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
251	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
252	dt_dopr_listing, dt_dots, dt_dvrp, dt_run_control, &
253	end_time, first_call_lpm, galilei_transformation, humidity, &
254	intermediate_timestep_count, &
255	intermediate_timestep_count_max, large_scale_forcing, &
256	loop_optimization, lsf_surf, lsf_vert, masks, &
257	microphysics_seifert, mid, nest_domain, &
258	neutral, nr_timesteps_this_run, nudging, &
259	ocean, on_device, passive_scalar, &
260	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
261	run_coupled, simulated_time, simulated_time_chr, &
262	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
263	skip_time_do3d, skip_time_domask, skip_time_dopr, &
264	skip_time_data_output_av, sloping_surface, &
265	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
266	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
267	time_do3d, time_domask, time_dopr, time_dopr_av, &
268	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
269	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
270	time_run_control, time_since_reference_point, &
271	turbulent_inflow, use_initial_profile_as_reference, &
272	use_single_reference_value, u_gtrans, v_gtrans, virtual_flight, &
273	ws_scheme_mom, ws_scheme_sca
274
275	USE cpulog, &
276	ONLY: cpu_log, log_point, log_point_s
277
278	USE flight_mod, &
279	ONLY: flight_measurement
280
281
282	USE indices, &
283	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
284	nxrg, nyn, nyng, nys, nysg, nzb, nzt, nzb_u_inner, nzb_v_inner
285
286	USE interaction_droplets_ptq_mod, &
287	ONLY: interaction_droplets_ptq
288
289	USE interfaces
290
291	USE kinds
292
293	USE land_surface_model_mod, &
294	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
295	skip_time_do_lsm
296
297	USE ls_forcing_mod, &
298	ONLY: ls_forcing_surf, ls_forcing_vert
299
300	USE microphysics_mod, &
301	ONLY: collision_turbulence
302
303	USE nudge_mod, &
304	ONLY: calc_tnudge, nudge_ref
305
306	USE particle_attributes, &
307	ONLY: particle_advection, particle_advection_start, &
308	use_sgs_for_particles, wang_kernel
309
310	USE pegrid
311
312	USE pmc_interface, &
313	ONLY: nested_run, nesting_mode, pmci_datatrans, &
314	pmci_ensure_nest_mass_conservation, pmci_synchronize
315
316	USE production_e_mod, &
317	ONLY: production_e_init
318
319	USE progress_bar, &
320	ONLY: finish_progress_bar, output_progress_bar
321
322	USE prognostic_equations_mod, &
323	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
324	prognostic_equations_vector
325
326	USE radiation_model_mod, &
327	ONLY: dt_radiation, force_radiation_call, radiation, radiation_control,&
328	skip_time_do_radiation, time_radiation
329
330	USE spectra_mod, &
331	ONLY: average_count_sp, averaging_interval_sp, calc_spectra, dt_dosp, &
332	skip_time_dosp
333
334	USE statistics, &
335	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l, u_max, &
336	u_max_ijk, v_max, v_max_ijk, w_max, w_max_ijk
337
338	USE surface_layer_fluxes_mod, &
339	ONLY: surface_layer_fluxes
340
341	USE user_actions_mod, &
342	ONLY: user_actions
343
344	USE wind_turbine_model_mod, &
345	ONLY: wind_turbine, wtm_forces
346
347	IMPLICIT NONE
348
349	CHARACTER (LEN=9) :: time_to_string !<
350
351	REAL(wp) :: dt_3d_old !< temporary storage of timestep to be used for
352	!< steering of run control output interval
353
354	!
355	!-- At beginning determine the first time step
356	CALL timestep
357
358	!
359	!-- Synchronize the timestep in case of nested run.
360	IF ( nested_run ) THEN
361	!
362	!-- Synchronization by unifying the time step.
363	!-- Global minimum of all time-steps is used for all.
364	CALL pmci_synchronize
365	ENDIF
366
367	!
368	!-- Determine and print out the run control quantities before the first time
369	!-- step of this run. For the initial run, some statistics (e.g. divergence)
370	!-- need to be determined first.
371	IF ( simulated_time == 0.0_wp ) CALL flow_statistics
372	CALL run_control
373
374	!
375	!-- Data exchange between coupled models in case that a call has been omitted
376	!-- at the end of the previous run of a job chain.
377	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
378	!
379	!-- In case of model termination initiated by the local model the coupler
380	!-- must not be called because this would again cause an MPI hang.
381	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
382	CALL surface_coupler
383	time_coupling = time_coupling - dt_coupling
384	ENDDO
385	IF (time_coupling == 0.0_wp .AND. &
386	time_since_reference_point < dt_coupling ) &
387	THEN
388	time_coupling = time_since_reference_point
389	ENDIF
390	ENDIF
391
392	#if defined( __dvrp_graphics )
393	!
394	!-- Time measurement with dvrp software
395	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
396	#endif
397
398	CALL location_message( 'start with time-stepping', .TRUE. )
399	!
400	!-- Start of the time loop
401	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
402	.NOT. terminate_run )
403
404	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
405
406	!
407	!-- Determine ug, vg and w_subs in dependence on data from external file
408	!-- LSF_DATA
409	IF ( large_scale_forcing .AND. lsf_vert ) THEN
410	CALL ls_forcing_vert ( simulated_time )
411	sums_ls_l = 0.0_wp
412	ENDIF
413
414	!
415	!-- Set pt_init and q_init to the current profiles taken from
416	!-- NUDGING_DATA
417	IF ( nudging ) THEN
418	CALL nudge_ref ( simulated_time )
419	!
420	!-- Store temperature gradient at the top boundary for possible Neumann
421	!-- boundary condition
422	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
423	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
424	ENDIF
425
426	!
427	!-- Execute the user-defined actions
428	CALL user_actions( 'before_timestep' )
429
430	!
431	!-- Calculate forces by wind turbines
432	IF ( wind_turbine ) THEN
433
434	CALL cpu_log( log_point(55), 'wind_turbine', 'start' )
435
436	CALL wtm_forces
437
438	CALL cpu_log( log_point(55), 'wind_turbine', 'stop' )
439
440	ENDIF
441
442	!
443	!-- Start of intermediate step loop
444	intermediate_timestep_count = 0
445	DO WHILE ( intermediate_timestep_count < &
446	intermediate_timestep_count_max )
447
448	intermediate_timestep_count = intermediate_timestep_count + 1
449
450	!
451	!-- Set the steering factors for the prognostic equations which depend
452	!-- on the timestep scheme
453	CALL timestep_scheme_steering
454
455	!
456	!-- Calculate those variables needed in the tendency terms which need
457	!-- global communication
458	IF ( .NOT. use_single_reference_value .AND. &
459	.NOT. use_initial_profile_as_reference ) THEN
460	!
461	!-- Horizontally averaged profiles to be used as reference state in
462	!-- buoyancy terms (WARNING: only the respective last call of
463	!-- calc_mean_profile defines the reference state!)
464	IF ( .NOT. neutral ) THEN
465	CALL calc_mean_profile( pt, 4 )
466	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
467	ENDIF
468	IF ( ocean ) THEN
469	CALL calc_mean_profile( rho, 64 )
470	ref_state(:) = hom(:,1,64,0)
471	ENDIF
472	IF ( humidity ) THEN
473	CALL calc_mean_profile( vpt, 44 )
474	ref_state(:) = hom(:,1,44,0)
475	ENDIF
476
477	ENDIF
478
479	IF ( .NOT. constant_diffusion ) CALL production_e_init
480	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
481	intermediate_timestep_count == 1 ) CALL ws_statistics
482	!
483	!-- In case of nudging calculate current nudging time scale and horizontal
484	!-- means of u, v, pt and q
485	IF ( nudging ) THEN
486	CALL calc_tnudge( simulated_time )
487	CALL calc_mean_profile( u, 1 )
488	CALL calc_mean_profile( v, 2 )
489	CALL calc_mean_profile( pt, 4 )
490	CALL calc_mean_profile( q, 41 )
491	ENDIF
492
493	!
494	!-- Solve the prognostic equations. A fast cache optimized version with
495	!-- only one single loop is used in case of Piascek-Williams advection
496	!-- scheme. NEC vector machines use a different version, because
497	!-- in the other versions a good vectorization is prohibited due to
498	!-- inlining problems.
499	IF ( loop_optimization == 'cache' ) THEN
500	CALL prognostic_equations_cache
501	ELSEIF ( loop_optimization == 'vector' ) THEN
502	CALL prognostic_equations_vector
503	ELSEIF ( loop_optimization == 'acc' ) THEN
504	i_left = nxl; i_right = nxr
505	j_south = nys; j_north = nyn
506	CALL prognostic_equations_acc
507
508	! i_left = nxl; i_right = nxl+nbgp-1
509	! j_south = nys; j_north = nyn
510	! CALL prognostic_equations_acc
511	! i_left = nxr-nbgp+1; i_right = nxr
512	! j_south = nys; j_north = nyn
513	! CALL prognostic_equations_acc
514
515	!
516	!-- Exchange of ghost points (lateral boundary conditions)
517	IF ( background_communication ) THEN
518
519	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
520
521	send_receive = 'lr'
522	sendrecv_in_background = .TRUE.
523	req = 0
524	req_count = 0
525
526	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
527	on_device = .TRUE. ! to be removed after complete porting
528	ELSE ! of ghost point exchange
529	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
530	ENDIF
531
532	CALL exchange_horiz( u_p, nbgp )
533	CALL exchange_horiz( v_p, nbgp )
534	CALL exchange_horiz( w_p, nbgp )
535	CALL exchange_horiz( pt_p, nbgp )
536	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
537	IF ( ocean ) THEN
538	CALL exchange_horiz( sa_p, nbgp )
539	CALL exchange_horiz( rho, nbgp )
540	CALL exchange_horiz( prho, nbgp )
541	ENDIF
542	IF ( humidity ) THEN
543	CALL exchange_horiz( q_p, nbgp )
544	IF ( cloud_physics .AND. microphysics_seifert ) THEN
545	CALL exchange_horiz( qr_p, nbgp )
546	CALL exchange_horiz( nr_p, nbgp )
547	ENDIF
548	ENDIF
549	IF ( cloud_droplets ) THEN
550	CALL exchange_horiz( ql, nbgp )
551	CALL exchange_horiz( ql_c, nbgp )
552	CALL exchange_horiz( ql_v, nbgp )
553	CALL exchange_horiz( ql_vp, nbgp )
554	ENDIF
555	IF ( wang_kernel .OR. collision_turbulence .OR. &
556	use_sgs_for_particles ) THEN
557	CALL exchange_horiz( diss, nbgp )
558	ENDIF
559	IF ( passive_scalar ) CALL exchange_horiz( s_p, nbgp )
560
561	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
562	on_device = .FALSE. ! to be removed after complete porting
563	ELSE ! of ghost point exchange
564	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
565	ENDIF
566
567	sendrecv_in_background = .FALSE.
568
569	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
570
571	ENDIF
572
573	! i_left = nxl+nbgp; i_right = nxr-nbgp
574	! j_south = nys; j_north = nys+nbgp-1
575	! CALL prognostic_equations_acc
576	! i_left = nxl+nbgp; i_right = nxr-nbgp
577	! j_south = nyn-nbgp+1; j_north = nyn
578	! CALL prognostic_equations_acc
579
580	IF ( background_communication ) THEN
581	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
582	#if defined( __parallel )
583	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
584	#endif
585	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
586
587	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
588
589	send_receive = 'ns'
590	sendrecv_in_background = .TRUE.
591	req = 0
592	req_count = 0
593
594	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
595	on_device = .TRUE. ! to be removed after complete porting
596	ELSE ! of ghost point exchange
597	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
598	ENDIF
599
600	CALL exchange_horiz( u_p, nbgp )
601	CALL exchange_horiz( v_p, nbgp )
602	CALL exchange_horiz( w_p, nbgp )
603	CALL exchange_horiz( pt_p, nbgp )
604	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
605	IF ( ocean ) THEN
606	CALL exchange_horiz( sa_p, nbgp )
607	CALL exchange_horiz( rho, nbgp )
608	CALL exchange_horiz( prho, nbgp )
609	ENDIF
610	IF ( humidity ) THEN
611	CALL exchange_horiz( q_p, nbgp )
612	IF ( cloud_physics .AND. microphysics_seifert ) THEN
613	CALL exchange_horiz( qr_p, nbgp )
614	CALL exchange_horiz( nr_p, nbgp )
615	ENDIF
616	ENDIF
617	IF ( cloud_droplets ) THEN
618	CALL exchange_horiz( ql, nbgp )
619	CALL exchange_horiz( ql_c, nbgp )
620	CALL exchange_horiz( ql_v, nbgp )
621	CALL exchange_horiz( ql_vp, nbgp )
622	ENDIF
623	IF ( wang_kernel .OR. collision_turbulence .OR. &
624	use_sgs_for_particles ) THEN
625	CALL exchange_horiz( diss, nbgp )
626	ENDIF
627	IF ( passive_scalar ) CALL exchange_horiz( s_p, nbgp )
628
629	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
630	on_device = .FALSE. ! to be removed after complete porting
631	ELSE ! of ghost point exchange
632	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
633	ENDIF
634
635	sendrecv_in_background = .FALSE.
636
637	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
638
639	ENDIF
640
641	! i_left = nxl+nbgp; i_right = nxr-nbgp
642	! j_south = nys+nbgp; j_north = nyn-nbgp
643	! CALL prognostic_equations_acc
644
645	IF ( background_communication ) THEN
646	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
647	#if defined( __parallel )
648	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
649	#endif
650	send_receive = 'al'
651	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
652	ENDIF
653
654	ENDIF
655
656	!
657	!-- Particle transport/physics with the Lagrangian particle model
658	!-- (only once during intermediate steps, because it uses an Euler-step)
659	!-- ### particle model should be moved before prognostic_equations, in order
660	!-- to regard droplet interactions directly
661	IF ( particle_advection .AND. &
662	simulated_time >= particle_advection_start .AND. &
663	intermediate_timestep_count == 1 ) THEN
664	CALL lpm
665	first_call_lpm = .FALSE.
666	ENDIF
667
668	!
669	!-- Interaction of droplets with temperature and specific humidity.
670	!-- Droplet condensation and evaporation is calculated within
671	!-- advec_particles.
672	IF ( cloud_droplets .AND. &
673	intermediate_timestep_count == intermediate_timestep_count_max )&
674	THEN
675	CALL interaction_droplets_ptq
676	ENDIF
677
678	!
679	!-- Exchange of ghost points (lateral boundary conditions)
680	IF ( .NOT. background_communication ) THEN
681
682	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
683
684	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
685	on_device = .TRUE. ! to be removed after complete porting
686	ELSE ! of ghost point exchange
687	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
688	ENDIF
689
690	CALL exchange_horiz( u_p, nbgp )
691	CALL exchange_horiz( v_p, nbgp )
692	CALL exchange_horiz( w_p, nbgp )
693	CALL exchange_horiz( pt_p, nbgp )
694	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
695	IF ( ocean ) THEN
696	CALL exchange_horiz( sa_p, nbgp )
697	CALL exchange_horiz( rho, nbgp )
698	CALL exchange_horiz( prho, nbgp )
699	ENDIF
700	IF ( humidity ) THEN
701	CALL exchange_horiz( q_p, nbgp )
702	IF ( cloud_physics .AND. microphysics_seifert ) THEN
703	CALL exchange_horiz( qr_p, nbgp )
704	CALL exchange_horiz( nr_p, nbgp )
705	ENDIF
706	ENDIF
707	IF ( cloud_droplets ) THEN
708	CALL exchange_horiz( ql, nbgp )
709	CALL exchange_horiz( ql_c, nbgp )
710	CALL exchange_horiz( ql_v, nbgp )
711	CALL exchange_horiz( ql_vp, nbgp )
712	ENDIF
713	IF ( wang_kernel .OR. collision_turbulence .OR. &
714	use_sgs_for_particles ) THEN
715	CALL exchange_horiz( diss, nbgp )
716	ENDIF
717	IF ( passive_scalar ) CALL exchange_horiz( s_p, nbgp )
718
719	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
720	on_device = .FALSE. ! to be removed after complete porting
721	ELSE ! of ghost point exchange
722	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
723	ENDIF
724
725	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
726
727	ENDIF
728
729	!
730	!-- Boundary conditions for the prognostic quantities (except of the
731	!-- velocities at the outflow in case of a non-cyclic lateral wall)
732	CALL boundary_conds
733
734	!
735	!-- Swap the time levels in preparation for the next time step.
736	CALL swap_timelevel
737
738	IF ( nested_run ) THEN
739
740	CALL cpu_log( log_point(60), 'nesting', 'start' )
741	!
742	!-- Domain nesting. The data transfer subroutines pmci_parent_datatrans
743	!-- and pmci_child_datatrans are called inside the wrapper
744	!-- subroutine pmci_datatrans according to the control parameters
745	!-- nesting_mode and nesting_datatransfer_mode.
746	!-- TO_DO: why is nesting_mode given as a parameter here?
747	CALL pmci_datatrans( nesting_mode )
748
749	IF ( TRIM( nesting_mode ) == 'two-way' .OR. &
750	nesting_mode == 'vertical' ) THEN
751	!
752	!-- Exchange_horiz is needed for all parent-domains after the
753	!-- anterpolation
754	CALL exchange_horiz( u, nbgp )
755	CALL exchange_horiz( v, nbgp )
756	CALL exchange_horiz( w, nbgp )
757	IF ( .NOT. neutral ) CALL exchange_horiz( pt, nbgp )
758	IF ( humidity ) CALL exchange_horiz( q, nbgp )
759	IF ( passive_scalar ) CALL exchange_horiz( s, nbgp )
760	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
761	ENDIF
762	!
763	!-- Correct the w top-BC in nest domains to ensure mass conservation.
764	!-- This action must never be done for the root domain. Vertical
765	!-- nesting implies mass conservation.
766	IF ( nest_domain ) THEN
767	CALL pmci_ensure_nest_mass_conservation
768	ENDIF
769
770	CALL cpu_log( log_point(60), 'nesting', 'stop' )
771
772	ENDIF
773
774	!
775	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
776	!-- when a sloping surface is used
777	IF ( sloping_surface ) THEN
778	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
779	pt_slope_offset
780	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
781	pt_slope_offset
782	ENDIF
783
784	!
785	!-- Impose a turbulent inflow using the recycling method
786	IF ( turbulent_inflow ) CALL inflow_turbulence
787
788	!
789	!-- Impose a random perturbation on the horizontal velocity field
790	IF ( create_disturbances .AND. &
791	( call_psolver_at_all_substeps .AND. &
792	intermediate_timestep_count == intermediate_timestep_count_max )&
793	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
794	intermediate_timestep_count == 1 ) ) &
795	THEN
796	time_disturb = time_disturb + dt_3d
797	IF ( time_disturb >= dt_disturb ) THEN
798	!$acc update host( u, v )
799	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
800	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
801	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
802	CALL disturb_field( nzb_u_inner, tend, u )
803	CALL disturb_field( nzb_v_inner, tend, v )
804	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
805	!
806	!-- Runs with a non-cyclic lateral wall need perturbations
807	!-- near the inflow throughout the whole simulation
808	dist_range = 1
809	CALL disturb_field( nzb_u_inner, tend, u )
810	CALL disturb_field( nzb_v_inner, tend, v )
811	dist_range = 0
812	ENDIF
813	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
814	!$acc update device( u, v )
815	time_disturb = time_disturb - dt_disturb
816	ENDIF
817	ENDIF
818
819	!
820	!-- Reduce the velocity divergence via the equation for perturbation
821	!-- pressure.
822	IF ( intermediate_timestep_count == 1 .OR. &
823	call_psolver_at_all_substeps ) THEN
824	CALL pres
825	ENDIF
826
827	!
828	!-- If required, compute liquid water content
829	IF ( cloud_physics ) THEN
830	CALL calc_liquid_water_content
831	!$acc update device( ql )
832	ENDIF
833	!
834	!-- If required, compute virtual potential temperature
835	IF ( humidity ) THEN
836	CALL compute_vpt
837	!$acc update device( vpt )
838	ENDIF
839
840	!
841	!-- Compute the diffusion quantities
842	IF ( .NOT. constant_diffusion ) THEN
843
844	!
845	!-- Determine surface fluxes shf and qsws and surface values
846	!-- pt_surface and q_surface in dependence on data from external
847	!-- file LSF_DATA respectively
848	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
849	intermediate_timestep_count == intermediate_timestep_count_max )&
850	THEN
851	CALL ls_forcing_surf ( simulated_time )
852	ENDIF
853
854	!
855	!-- First the vertical fluxes in the surface (constant flux) layer are computed
856	IF ( constant_flux_layer ) THEN
857	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
858	CALL surface_layer_fluxes
859	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
860	ENDIF
861
862	!
863	!-- If required, solve the energy balance for the surface and run soil
864	!-- model
865	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
866
867	CALL cpu_log( log_point(54), 'land_surface', 'start' )
868	CALL lsm_energy_balance
869	CALL lsm_soil_model
870	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
871	ENDIF
872	!
873	!-- Compute the diffusion coefficients
874	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
875	IF ( .NOT. humidity ) THEN
876	IF ( ocean ) THEN
877	CALL diffusivities( prho, prho_reference )
878	ELSE
879	CALL diffusivities( pt, pt_reference )
880	ENDIF
881	ELSE
882	CALL diffusivities( vpt, pt_reference )
883	ENDIF
884	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
885
886	ENDIF
887
888	!
889	!-- If required, calculate radiative fluxes and heating rates
890	IF ( radiation .AND. intermediate_timestep_count &
891	== intermediate_timestep_count_max .AND. simulated_time > &
892	skip_time_do_radiation ) THEN
893
894	time_radiation = time_radiation + dt_3d
895
896	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
897	THEN
898
899	CALL cpu_log( log_point(50), 'radiation', 'start' )
900
901	IF ( .NOT. force_radiation_call ) THEN
902	time_radiation = time_radiation - dt_radiation
903	ENDIF
904
905	CALL radiation_control
906
907	CALL cpu_log( log_point(50), 'radiation', 'stop' )
908	ENDIF
909	ENDIF
910
911	ENDDO ! Intermediate step loop
912
913	!
914	!-- Increase simulation time and output times
915	nr_timesteps_this_run = nr_timesteps_this_run + 1
916	current_timestep_number = current_timestep_number + 1
917	simulated_time = simulated_time + dt_3d
918	simulated_time_chr = time_to_string( simulated_time )
919	time_since_reference_point = simulated_time - coupling_start_time
920
921
922
923	IF ( simulated_time >= skip_time_data_output_av ) THEN
924	time_do_av = time_do_av + dt_3d
925	ENDIF
926	IF ( simulated_time >= skip_time_do2d_xy ) THEN
927	time_do2d_xy = time_do2d_xy + dt_3d
928	ENDIF
929	IF ( simulated_time >= skip_time_do2d_xz ) THEN
930	time_do2d_xz = time_do2d_xz + dt_3d
931	ENDIF
932	IF ( simulated_time >= skip_time_do2d_yz ) THEN
933	time_do2d_yz = time_do2d_yz + dt_3d
934	ENDIF
935	IF ( simulated_time >= skip_time_do3d ) THEN
936	time_do3d = time_do3d + dt_3d
937	ENDIF
938	DO mid = 1, masks
939	IF ( simulated_time >= skip_time_domask(mid) ) THEN
940	time_domask(mid)= time_domask(mid) + dt_3d
941	ENDIF
942	ENDDO
943	time_dvrp = time_dvrp + dt_3d
944	IF ( simulated_time >= skip_time_dosp ) THEN
945	time_dosp = time_dosp + dt_3d
946	ENDIF
947	time_dots = time_dots + dt_3d
948	IF ( .NOT. first_call_lpm ) THEN
949	time_dopts = time_dopts + dt_3d
950	ENDIF
951	IF ( simulated_time >= skip_time_dopr ) THEN
952	time_dopr = time_dopr + dt_3d
953	ENDIF
954	time_dopr_listing = time_dopr_listing + dt_3d
955	time_run_control = time_run_control + dt_3d
956
957	!
958	!-- Data exchange between coupled models
959	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
960	time_coupling = time_coupling + dt_3d
961
962	!
963	!-- In case of model termination initiated by the local model
964	!-- (terminate_coupled > 0), the coupler must be skipped because it would
965	!-- cause an MPI intercomminucation hang.
966	!-- If necessary, the coupler will be called at the beginning of the
967	!-- next restart run.
968	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
969	CALL surface_coupler
970	time_coupling = time_coupling - dt_coupling
971	ENDDO
972	ENDIF
973
974	!
975	!-- Execute user-defined actions
976	CALL user_actions( 'after_integration' )
977
978	!
979	!-- If Galilei transformation is used, determine the distance that the
980	!-- model has moved so far
981	IF ( galilei_transformation ) THEN
982	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
983	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
984	ENDIF
985
986	!
987	!-- Check, if restart is necessary (because cpu-time is expiring or
988	!-- because it is forced by user) and set stop flag
989	!-- This call is skipped if the remote model has already initiated a restart.
990	IF ( .NOT. terminate_run ) CALL check_for_restart
991
992	!
993	!-- Carry out statistical analysis and output at the requested output times.
994	!-- The MOD function is used for calculating the output time counters (like
995	!-- time_dopr) in order to regard a possible decrease of the output time
996	!-- interval in case of restart runs
997
998	!
999	!-- Set a flag indicating that so far no statistics have been created
1000	!-- for this time step
1001	flow_statistics_called = .FALSE.
1002
1003	!
1004	!-- If required, call flow_statistics for averaging in time
1005	IF ( averaging_interval_pr /= 0.0_wp .AND. &
1006	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
1007	simulated_time >= skip_time_dopr ) THEN
1008	time_dopr_av = time_dopr_av + dt_3d
1009	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
1010	do_sum = .TRUE.
1011	time_dopr_av = MOD( time_dopr_av, &
1012	MAX( dt_averaging_input_pr, dt_3d ) )
1013	ENDIF
1014	ENDIF
1015	IF ( do_sum ) CALL flow_statistics
1016
1017	!
1018	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
1019	IF ( averaging_interval /= 0.0_wp .AND. &
1020	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
1021	simulated_time >= skip_time_data_output_av ) &
1022	THEN
1023	time_do_sla = time_do_sla + dt_3d
1024	IF ( time_do_sla >= dt_averaging_input ) THEN
1025	CALL sum_up_3d_data
1026	average_count_3d = average_count_3d + 1
1027	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
1028	ENDIF
1029	ENDIF
1030
1031	!
1032	!-- Calculate spectra for time averaging
1033	IF ( averaging_interval_sp /= 0.0_wp .AND. &
1034	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
1035	simulated_time >= skip_time_dosp ) THEN
1036	time_dosp_av = time_dosp_av + dt_3d
1037	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
1038	CALL calc_spectra
1039	time_dosp_av = MOD( time_dosp_av, &
1040	MAX( dt_averaging_input_pr, dt_3d ) )
1041	ENDIF
1042	ENDIF
1043
1044	!
1045	!-- Call flight module and output data
1046	IF ( virtual_flight ) THEN
1047	CALL flight_measurement
1048	CALL data_output_flight
1049	ENDIF
1050
1051	!
1052	!-- Profile output (ASCII) on file
1053	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1054	CALL print_1d
1055	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1056	dt_3d ) )
1057	ENDIF
1058
1059	!
1060	!-- Graphic output for PROFIL
1061	IF ( time_dopr >= dt_dopr ) THEN
1062	IF ( dopr_n /= 0 ) CALL data_output_profiles
1063	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1064	time_dopr_av = 0.0_wp ! due to averaging (see above)
1065	ENDIF
1066
1067	!
1068	!-- Graphic output for time series
1069	IF ( time_dots >= dt_dots ) THEN
1070	CALL data_output_tseries
1071	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1072	ENDIF
1073
1074	!
1075	!-- Output of spectra (formatted for use with PROFIL), in case of no
1076	!-- time averaging, spectra has to be calculated before
1077	IF ( time_dosp >= dt_dosp ) THEN
1078	IF ( average_count_sp == 0 ) CALL calc_spectra
1079	CALL data_output_spectra
1080	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1081	ENDIF
1082
1083	!
1084	!-- 2d-data output (cross-sections)
1085	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1086	CALL data_output_2d( 'xy', 0 )
1087	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1088	ENDIF
1089	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1090	CALL data_output_2d( 'xz', 0 )
1091	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1092	ENDIF
1093	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1094	CALL data_output_2d( 'yz', 0 )
1095	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1096	ENDIF
1097
1098	!
1099	!-- 3d-data output (volume data)
1100	IF ( time_do3d >= dt_do3d ) THEN
1101	CALL data_output_3d( 0 )
1102	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1103	ENDIF
1104
1105	!
1106	!-- Masked data output
1107	DO mid = 1, masks
1108	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1109	CALL data_output_mask( 0 )
1110	time_domask(mid) = MOD( time_domask(mid), &
1111	MAX( dt_domask(mid), dt_3d ) )
1112	ENDIF
1113	ENDDO
1114
1115	!
1116	!-- Output of time-averaged 2d/3d/masked data
1117	IF ( time_do_av >= dt_data_output_av ) THEN
1118	CALL average_3d_data
1119	CALL data_output_2d( 'xy', 1 )
1120	CALL data_output_2d( 'xz', 1 )
1121	CALL data_output_2d( 'yz', 1 )
1122	CALL data_output_3d( 1 )
1123	DO mid = 1, masks
1124	CALL data_output_mask( 1 )
1125	ENDDO
1126	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1127	ENDIF
1128
1129	!
1130	!-- Output of particle time series
1131	IF ( particle_advection ) THEN
1132	IF ( time_dopts >= dt_dopts .OR. &
1133	( simulated_time >= particle_advection_start .AND. &
1134	first_call_lpm ) ) THEN
1135	CALL data_output_ptseries
1136	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1137	ENDIF
1138	ENDIF
1139
1140	!
1141	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1142	#if defined( __dvrp_graphics )
1143	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1144	#endif
1145	IF ( time_dvrp >= dt_dvrp ) THEN
1146	CALL data_output_dvrp
1147	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1148	ENDIF
1149	#if defined( __dvrp_graphics )
1150	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1151	#endif
1152
1153	!
1154	!-- If required, set the heat flux for the next time step at a random value
1155	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
1156
1157	!
1158	!-- Execute user-defined actions
1159	CALL user_actions( 'after_timestep' )
1160
1161	!
1162	!-- Determine size of next time step. Save timestep dt_3d because it is
1163	!-- newly calculated in routine timestep, but required further below for
1164	!-- steering the run control output interval
1165	dt_3d_old = dt_3d
1166	CALL timestep
1167
1168	!
1169	!-- Synchronize the timestep in case of nested run.
1170	IF ( nested_run ) THEN
1171	!
1172	!-- Synchronize by unifying the time step.
1173	!-- Global minimum of all time-steps is used for all.
1174	CALL pmci_synchronize
1175	ENDIF
1176
1177	!
1178	!-- Computation and output of run control parameters.
1179	!-- This is also done whenever perturbations have been imposed
1180	IF ( time_run_control >= dt_run_control .OR. &
1181	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
1182	THEN
1183	! IF ( current_timestep_number == 1 ) THEN
1184	! IF ( nxl < 7 .AND. nxr > 7 .AND. nys < 7 .AND. nyn > 7 ) THEN
1185	! u(10,7,7) = 0.55
1186	! ENDIF
1187	! PRINT*, 'calculating minmax'
1188	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, u, &
1189	! 'abs', 0.0_wp, u_max, u_max_ijk )
1190	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, v, &
1191	! 'abs', 0.0_wp, v_max, v_max_ijk )
1192	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, w, &
1193	! 'abs', 0.0_wp, w_max, w_max_ijk )
1194	! PRINT*, 'calculated u_max = ', u_max, ' myid = ', myid
1195	! ENDIF
1196	CALL run_control
1197	IF ( time_run_control >= dt_run_control ) THEN
1198	time_run_control = MOD( time_run_control, &
1199	MAX( dt_run_control, dt_3d_old ) )
1200	ENDIF
1201	ENDIF
1202
1203	!
1204	!-- Output elapsed simulated time in form of a progress bar on stdout
1205	IF ( myid == 0 ) CALL output_progress_bar
1206
1207	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1208
1209
1210	ENDDO ! time loop
1211
1212	IF ( myid == 0 ) CALL finish_progress_bar
1213
1214	#if defined( __dvrp_graphics )
1215	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1216	#endif
1217
1218	CALL location_message( 'finished time-stepping', .TRUE. )
1219
1220	END SUBROUTINE time_integration

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