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source: palm/trunk/SOURCE/time_integration.f90 @ 1961

Last change on this file since 1961 was 1961, checked in by suehring, 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 terms
6	! of the GNU General Public License as published by the Free Software Foundation,
7	! either version 3 of the License, or (at your option) any later version.
8	!
9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12	!
13	! You should have received a copy of the GNU General Public License along with
14	! PALM. If not, see <http://www.gnu.org/licenses/>.
15	!
16	! Copyright 1997-2016 Leibniz Universitaet Hannover
17	!--------------------------------------------------------------------------------!
18	!
19	! Current revisions:
20	! ------------------
21	!
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: time_integration.f90 1961 2016-07-12 16:37:58Z suehring $
26	!
27	! 1960 2016-07-12 16:34:24Z suehring
28	! Separate humidity and passive scalar
29	!
30	! 1957 2016-07-07 10:43:48Z suehring
31	! flight module added
32	!
33	! 1919 2016-05-27 14:51:23Z raasch
34	! Initial version of purely vertical nesting introduced.
35	!
36	! 1918 2016-05-27 14:35:57Z raasch
37	! determination of time step moved to the end of the time step loop,
38	! the first time step is now always calculated before the time step loop (i.e.
39	! also in case of restart runs)
40	!
41	! 1914 2016-05-26 14:44:07Z witha
42	! Added call for wind turbine model
43	!
44	! 1878 2016-04-19 12:30:36Z hellstea
45	! Synchronization for nested runs rewritten
46	!
47	! 1853 2016-04-11 09:00:35Z maronga
48	! Adjusted for use with radiation_scheme = constant
49	!
50	! 1849 2016-04-08 11:33:18Z hoffmann
51	! Adapted for modularization of microphysics
52	!
53	! 1833 2016-04-07 14:23:03Z raasch
54	! spectrum renamed spectra_mod, spectra related variables moved to spectra_mod
55	!
56	! 1831 2016-04-07 13:15:51Z hoffmann
57	! turbulence renamed collision_turbulence
58	!
59	! 1822 2016-04-07 07:49:42Z hoffmann
60	! icloud_scheme replaced by microphysics_*
61	!
62	! 1808 2016-04-05 19:44:00Z raasch
63	! output message in case unscheduled radiation calls removed
64	!
65	! 1797 2016-03-21 16:50:28Z raasch
66	! introduction of different datatransfer modes
67	!
68	! 1791 2016-03-11 10:41:25Z raasch
69	! call of pmci_update_new removed
70	!
71	! 1786 2016-03-08 05:49:27Z raasch
72	! +module spectrum
73	!
74	! 1783 2016-03-06 18:36:17Z raasch
75	! switch back of netcdf data format for mask output moved to the mask output
76	! routine
77	!
78	! 1781 2016-03-03 15:12:23Z raasch
79	! some pmc calls removed at the beginning (before timeloop),
80	! pmc initialization moved to the main program
81	!
82	! 1764 2016-02-28 12:45:19Z raasch
83	! PMC_ACTIVE flags removed,
84	! bugfix: nest synchronization after first call of timestep
85	!
86	! 1762 2016-02-25 12:31:13Z hellstea
87	! Introduction of nested domain feature
88	!
89	! 1736 2015-12-04 08:56:33Z raasch
90	! no perturbations added to total domain if energy limit has been set zero
91	!
92	! 1691 2015-10-26 16:17:44Z maronga
93	! Added option for spin-ups without land surface and radiation models. Moved calls
94	! for radiation and lan surface schemes.
95	!
96	! 1682 2015-10-07 23:56:08Z knoop
97	! Code annotations made doxygen readable
98	!
99	! 1671 2015-09-25 03:29:37Z raasch
100	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
101	! for particles
102	!
103	! 1585 2015-04-30 07:05:52Z maronga
104	! Moved call of radiation scheme. Added support for RRTM
105	!
106	! 1551 2015-03-03 14:18:16Z maronga
107	! Added interface for different radiation schemes.
108	!
109	! 1496 2014-12-02 17:25:50Z maronga
110	! Added calls for the land surface model and radiation scheme
111	!
112	! 1402 2014-05-09 14:25:13Z raasch
113	! location messages modified
114	!
115	! 1384 2014-05-02 14:31:06Z raasch
116	! location messages added
117	!
118	! 1380 2014-04-28 12:40:45Z heinze
119	! CALL of nudge_ref added
120	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
121	!
122	! 1365 2014-04-22 15:03:56Z boeske
123	! Reset sums_ls_l to zero at each timestep
124	! +sums_ls_l
125	! Calculation of reference state (previously in subroutine calc_mean_profile)
126
127	! 1342 2014-03-26 17:04:47Z kanani
128	! REAL constants defined as wp-kind
129	!
130	! 1320 2014-03-20 08:40:49Z raasch
131	! ONLY-attribute added to USE-statements,
132	! kind-parameters added to all INTEGER and REAL declaration statements,
133	! kinds are defined in new module kinds,
134	! old module precision_kind is removed,
135	! revision history before 2012 removed,
136	! comment fields (!:) to be used for variable explanations added to
137	! all variable declaration statements
138	! 1318 2014-03-17 13:35:16Z raasch
139	! module interfaces removed
140	!
141	! 1308 2014-03-13 14:58:42Z fricke
142	! +netcdf_data_format_save
143	! For masked data, parallel netcdf output is not tested so far, hence
144	! netcdf_data_format is switched back to non-paralell output.
145	!
146	! 1276 2014-01-15 13:40:41Z heinze
147	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
148	!
149	! 1257 2013-11-08 15:18:40Z raasch
150	! acc-update-host directive for timestep removed
151	!
152	! 1241 2013-10-30 11:36:58Z heinze
153	! Generalize calc_mean_profile for wider use
154	! Determine shf and qsws in dependence on data from LSF_DATA
155	! Determine ug and vg in dependence on data from LSF_DATA
156	! 1221 2013-09-10 08:59:13Z raasch
157	! host update of arrays before timestep is called
158	!
159	! 1179 2013-06-14 05:57:58Z raasch
160	! mean profiles for reference state are only calculated if required,
161	! small bugfix for background communication
162	!
163	! 1171 2013-05-30 11:27:45Z raasch
164	! split of prognostic_equations deactivated (comment lines), for the time being
165	!
166	! 1128 2013-04-12 06:19:32Z raasch
167	! asynchronous transfer of ghost point data realized for acc-optimized version:
168	! prognostic_equations are first called two times for those points required for
169	! the left-right and north-south exchange, respectively, and then for the
170	! remaining points,
171	! those parts requiring global communication moved from prognostic_equations to
172	! here
173	!
174	! 1115 2013-03-26 18:16:16Z hoffmann
175	! calculation of qr and nr is restricted to precipitation
176	!
177	! 1113 2013-03-10 02:48:14Z raasch
178	! GPU-porting of boundary conditions,
179	! openACC directives updated
180	! formal parameter removed from routine boundary_conds
181	!
182	! 1111 2013-03-08 23:54:10Z raasch
183	! +internal timestep counter for cpu statistics added,
184	! openACC directives updated
185	!
186	! 1092 2013-02-02 11:24:22Z raasch
187	! unused variables removed
188	!
189	! 1065 2012-11-22 17:42:36Z hoffmann
190	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
191	!
192	! 1053 2012-11-13 17:11:03Z hoffmann
193	! exchange of ghost points for nr, qr added
194	!
195	! 1036 2012-10-22 13:43:42Z raasch
196	! code put under GPL (PALM 3.9)
197	!
198	! 1019 2012-09-28 06:46:45Z raasch
199	! non-optimized version of prognostic_equations removed
200	!
201	! 1015 2012-09-27 09:23:24Z raasch
202	! +call of prognostic_equations_acc
203	!
204	! 1001 2012-09-13 14:08:46Z raasch
205	! all actions concerning leapfrog- and upstream-spline-scheme removed
206	!
207	! 849 2012-03-15 10:35:09Z raasch
208	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
209	!
210	! 825 2012-02-19 03:03:44Z raasch
211	! wang_collision_kernel renamed wang_kernel
212	!
213	! Revision 1.1 1997/08/11 06:19:04 raasch
214	! Initial revision
215	!
216	!
217	! Description:
218	! ------------
219	!> Integration in time of the model equations, statistical analysis and graphic
220	!> output
221	!------------------------------------------------------------------------------!
222	SUBROUTINE time_integration
223
224
225	USE advec_ws, &
226	ONLY: ws_statistics
227
228	USE arrays_3d, &
229	ONLY: diss, dzu, e, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, &
230	ql, ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, s, s_p, sa_p, &
231	tend, u, u_p, v, vpt, v_p, w, w_p
232
233	USE calc_mean_profile_mod, &
234	ONLY: calc_mean_profile
235
236	USE control_parameters, &
237	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
238	averaging_interval, averaging_interval_pr, &
239	bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
240	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
241	cloud_physics, constant_flux_layer, constant_heatflux, &
242	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
243	coupling_start_time, current_timestep_number, &
244	disturbance_created, disturbance_energy_limit, dist_range, &
245	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
246	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
247	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
248	dt_dopr_listing, dt_dots, dt_dvrp, dt_run_control, &
249	end_time, first_call_lpm, galilei_transformation, humidity, &
250	intermediate_timestep_count, &
251	intermediate_timestep_count_max, large_scale_forcing, &
252	loop_optimization, lsf_surf, lsf_vert, masks, &
253	microphysics_seifert, mid, nest_domain, &
254	neutral, nr_timesteps_this_run, nudging, &
255	ocean, on_device, passive_scalar, &
256	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
257	run_coupled, simulated_time, simulated_time_chr, &
258	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
259	skip_time_do3d, skip_time_domask, skip_time_dopr, &
260	skip_time_data_output_av, sloping_surface, &
261	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
262	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
263	time_do3d, time_domask, time_dopr, time_dopr_av, &
264	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
265	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
266	time_run_control, time_since_reference_point, &
267	turbulent_inflow, use_initial_profile_as_reference, &
268	use_single_reference_value, u_gtrans, v_gtrans, virtual_flight, &
269	ws_scheme_mom, ws_scheme_sca
270
271	USE cpulog, &
272	ONLY: cpu_log, log_point, log_point_s
273
274	USE flight_mod, &
275	ONLY: flight_measurement
276
277
278	USE indices, &
279	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
280	nxrg, nyn, nyng, nys, nysg, nzb, nzt, nzb_u_inner, nzb_v_inner
281
282	USE interaction_droplets_ptq_mod, &
283	ONLY: interaction_droplets_ptq
284
285	USE interfaces
286
287	USE kinds
288
289	USE land_surface_model_mod, &
290	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
291	skip_time_do_lsm
292
293	USE ls_forcing_mod, &
294	ONLY: ls_forcing_surf, ls_forcing_vert
295
296	USE microphysics_mod, &
297	ONLY: collision_turbulence
298
299	USE nudge_mod, &
300	ONLY: calc_tnudge, nudge_ref
301
302	USE particle_attributes, &
303	ONLY: particle_advection, particle_advection_start, &
304	use_sgs_for_particles, wang_kernel
305
306	USE pegrid
307
308	USE pmc_interface, &
309	ONLY: nested_run, nesting_mode, pmci_datatrans, &
310	pmci_ensure_nest_mass_conservation, pmci_synchronize
311
312	USE production_e_mod, &
313	ONLY: production_e_init
314
315	USE progress_bar, &
316	ONLY: finish_progress_bar, output_progress_bar
317
318	USE prognostic_equations_mod, &
319	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
320	prognostic_equations_vector
321
322	USE radiation_model_mod, &
323	ONLY: dt_radiation, force_radiation_call, radiation, &
324	radiation_clearsky, radiation_constant, radiation_rrtmg, &
325	radiation_scheme, skip_time_do_radiation, time_radiation
326
327	USE spectra_mod, &
328	ONLY: average_count_sp, averaging_interval_sp, calc_spectra, dt_dosp, &
329	skip_time_dosp
330
331	USE statistics, &
332	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l, u_max, &
333	u_max_ijk, v_max, v_max_ijk, w_max, w_max_ijk
334
335	USE surface_layer_fluxes_mod, &
336	ONLY: surface_layer_fluxes
337
338	USE user_actions_mod, &
339	ONLY: user_actions
340
341	USE wind_turbine_model_mod, &
342	ONLY: wind_turbine, wtm_forces
343
344	IMPLICIT NONE
345
346	CHARACTER (LEN=9) :: time_to_string !<
347
348	REAL(wp) :: dt_3d_old !< temporary storage of timestep to be used for
349	!< steering of run control output interval
350
351	!
352	!-- At beginning determine the first time step
353	CALL timestep
354
355	!
356	!-- Synchronize the timestep in case of nested run.
357	IF ( nested_run ) THEN
358	!
359	!-- Synchronization by unifying the time step.
360	!-- Global minimum of all time-steps is used for all.
361	CALL pmci_synchronize
362	ENDIF
363
364	!
365	!-- Determine and print out the run control quantities before the first time
366	!-- step of this run. For the initial run, some statistics (e.g. divergence)
367	!-- need to be determined first.
368	IF ( simulated_time == 0.0_wp ) CALL flow_statistics
369	CALL run_control
370
371	!
372	!-- Data exchange between coupled models in case that a call has been omitted
373	!-- at the end of the previous run of a job chain.
374	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
375	!
376	!-- In case of model termination initiated by the local model the coupler
377	!-- must not be called because this would again cause an MPI hang.
378	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
379	CALL surface_coupler
380	time_coupling = time_coupling - dt_coupling
381	ENDDO
382	IF (time_coupling == 0.0_wp .AND. &
383	time_since_reference_point < dt_coupling ) &
384	THEN
385	time_coupling = time_since_reference_point
386	ENDIF
387	ENDIF
388
389	#if defined( __dvrp_graphics )
390	!
391	!-- Time measurement with dvrp software
392	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
393	#endif
394
395	CALL location_message( 'start with time-stepping', .TRUE. )
396	!
397	!-- Start of the time loop
398	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
399	.NOT. terminate_run )
400
401	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
402
403	!
404	!-- Determine ug, vg and w_subs in dependence on data from external file
405	!-- LSF_DATA
406	IF ( large_scale_forcing .AND. lsf_vert ) THEN
407	CALL ls_forcing_vert ( simulated_time )
408	sums_ls_l = 0.0_wp
409	ENDIF
410
411	!
412	!-- Set pt_init and q_init to the current profiles taken from
413	!-- NUDGING_DATA
414	IF ( nudging ) THEN
415	CALL nudge_ref ( simulated_time )
416	!
417	!-- Store temperature gradient at the top boundary for possible Neumann
418	!-- boundary condition
419	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
420	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
421	ENDIF
422
423	!
424	!-- Execute the user-defined actions
425	CALL user_actions( 'before_timestep' )
426
427	!
428	!-- Calculate forces by wind turbines
429	IF ( wind_turbine ) THEN
430
431	CALL cpu_log( log_point(55), 'wind_turbine', 'start' )
432
433	CALL wtm_forces
434
435	CALL cpu_log( log_point(55), 'wind_turbine', 'stop' )
436
437	ENDIF
438
439	!
440	!-- Start of intermediate step loop
441	intermediate_timestep_count = 0
442	DO WHILE ( intermediate_timestep_count < &
443	intermediate_timestep_count_max )
444
445	intermediate_timestep_count = intermediate_timestep_count + 1
446
447	!
448	!-- Set the steering factors for the prognostic equations which depend
449	!-- on the timestep scheme
450	CALL timestep_scheme_steering
451
452	!
453	!-- Calculate those variables needed in the tendency terms which need
454	!-- global communication
455	IF ( .NOT. use_single_reference_value .AND. &
456	.NOT. use_initial_profile_as_reference ) THEN
457	!
458	!-- Horizontally averaged profiles to be used as reference state in
459	!-- buoyancy terms (WARNING: only the respective last call of
460	!-- calc_mean_profile defines the reference state!)
461	IF ( .NOT. neutral ) THEN
462	CALL calc_mean_profile( pt, 4 )
463	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
464	ENDIF
465	IF ( ocean ) THEN
466	CALL calc_mean_profile( rho, 64 )
467	ref_state(:) = hom(:,1,64,0)
468	ENDIF
469	IF ( humidity ) THEN
470	CALL calc_mean_profile( vpt, 44 )
471	ref_state(:) = hom(:,1,44,0)
472	ENDIF
473
474	ENDIF
475
476	IF ( .NOT. constant_diffusion ) CALL production_e_init
477	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
478	intermediate_timestep_count == 1 ) CALL ws_statistics
479	!
480	!-- In case of nudging calculate current nudging time scale and horizontal
481	!-- means of u, v, pt and q
482	IF ( nudging ) THEN
483	CALL calc_tnudge( simulated_time )
484	CALL calc_mean_profile( u, 1 )
485	CALL calc_mean_profile( v, 2 )
486	CALL calc_mean_profile( pt, 4 )
487	CALL calc_mean_profile( q, 41 )
488	ENDIF
489
490	!
491	!-- Solve the prognostic equations. A fast cache optimized version with
492	!-- only one single loop is used in case of Piascek-Williams advection
493	!-- scheme. NEC vector machines use a different version, because
494	!-- in the other versions a good vectorization is prohibited due to
495	!-- inlining problems.
496	IF ( loop_optimization == 'cache' ) THEN
497	CALL prognostic_equations_cache
498	ELSEIF ( loop_optimization == 'vector' ) THEN
499	CALL prognostic_equations_vector
500	ELSEIF ( loop_optimization == 'acc' ) THEN
501	i_left = nxl; i_right = nxr
502	j_south = nys; j_north = nyn
503	CALL prognostic_equations_acc
504
505	! i_left = nxl; i_right = nxl+nbgp-1
506	! j_south = nys; j_north = nyn
507	! CALL prognostic_equations_acc
508	! i_left = nxr-nbgp+1; i_right = nxr
509	! j_south = nys; j_north = nyn
510	! CALL prognostic_equations_acc
511
512	!
513	!-- Exchange of ghost points (lateral boundary conditions)
514	IF ( background_communication ) THEN
515
516	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
517
518	send_receive = 'lr'
519	sendrecv_in_background = .TRUE.
520	req = 0
521	req_count = 0
522
523	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
524	on_device = .TRUE. ! to be removed after complete porting
525	ELSE ! of ghost point exchange
526	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
527	ENDIF
528
529	CALL exchange_horiz( u_p, nbgp )
530	CALL exchange_horiz( v_p, nbgp )
531	CALL exchange_horiz( w_p, nbgp )
532	CALL exchange_horiz( pt_p, nbgp )
533	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
534	IF ( ocean ) THEN
535	CALL exchange_horiz( sa_p, nbgp )
536	CALL exchange_horiz( rho, nbgp )
537	CALL exchange_horiz( prho, nbgp )
538	ENDIF
539	IF ( humidity ) THEN
540	CALL exchange_horiz( q_p, nbgp )
541	IF ( cloud_physics .AND. microphysics_seifert ) THEN
542	CALL exchange_horiz( qr_p, nbgp )
543	CALL exchange_horiz( nr_p, nbgp )
544	ENDIF
545	ENDIF
546	IF ( cloud_droplets ) THEN
547	CALL exchange_horiz( ql, nbgp )
548	CALL exchange_horiz( ql_c, nbgp )
549	CALL exchange_horiz( ql_v, nbgp )
550	CALL exchange_horiz( ql_vp, nbgp )
551	ENDIF
552	IF ( wang_kernel .OR. collision_turbulence .OR. &
553	use_sgs_for_particles ) THEN
554	CALL exchange_horiz( diss, nbgp )
555	ENDIF
556	IF ( passive_scalar ) CALL exchange_horiz( s_p, nbgp )
557
558	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
559	on_device = .FALSE. ! to be removed after complete porting
560	ELSE ! of ghost point exchange
561	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
562	ENDIF
563
564	sendrecv_in_background = .FALSE.
565
566	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
567
568	ENDIF
569
570	! i_left = nxl+nbgp; i_right = nxr-nbgp
571	! j_south = nys; j_north = nys+nbgp-1
572	! CALL prognostic_equations_acc
573	! i_left = nxl+nbgp; i_right = nxr-nbgp
574	! j_south = nyn-nbgp+1; j_north = nyn
575	! CALL prognostic_equations_acc
576
577	IF ( background_communication ) THEN
578	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
579	#if defined( __parallel )
580	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
581	#endif
582	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
583
584	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
585
586	send_receive = 'ns'
587	sendrecv_in_background = .TRUE.
588	req = 0
589	req_count = 0
590
591	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
592	on_device = .TRUE. ! to be removed after complete porting
593	ELSE ! of ghost point exchange
594	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
595	ENDIF
596
597	CALL exchange_horiz( u_p, nbgp )
598	CALL exchange_horiz( v_p, nbgp )
599	CALL exchange_horiz( w_p, nbgp )
600	CALL exchange_horiz( pt_p, nbgp )
601	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
602	IF ( ocean ) THEN
603	CALL exchange_horiz( sa_p, nbgp )
604	CALL exchange_horiz( rho, nbgp )
605	CALL exchange_horiz( prho, nbgp )
606	ENDIF
607	IF ( humidity ) THEN
608	CALL exchange_horiz( q_p, nbgp )
609	IF ( cloud_physics .AND. microphysics_seifert ) THEN
610	CALL exchange_horiz( qr_p, nbgp )
611	CALL exchange_horiz( nr_p, nbgp )
612	ENDIF
613	ENDIF
614	IF ( cloud_droplets ) THEN
615	CALL exchange_horiz( ql, nbgp )
616	CALL exchange_horiz( ql_c, nbgp )
617	CALL exchange_horiz( ql_v, nbgp )
618	CALL exchange_horiz( ql_vp, nbgp )
619	ENDIF
620	IF ( wang_kernel .OR. collision_turbulence .OR. &
621	use_sgs_for_particles ) THEN
622	CALL exchange_horiz( diss, nbgp )
623	ENDIF
624	IF ( passive_scalar ) CALL exchange_horiz( s_p, nbgp )
625
626	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
627	on_device = .FALSE. ! to be removed after complete porting
628	ELSE ! of ghost point exchange
629	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
630	ENDIF
631
632	sendrecv_in_background = .FALSE.
633
634	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
635
636	ENDIF
637
638	! i_left = nxl+nbgp; i_right = nxr-nbgp
639	! j_south = nys+nbgp; j_north = nyn-nbgp
640	! CALL prognostic_equations_acc
641
642	IF ( background_communication ) THEN
643	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
644	#if defined( __parallel )
645	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
646	#endif
647	send_receive = 'al'
648	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
649	ENDIF
650
651	ENDIF
652
653	!
654	!-- Particle transport/physics with the Lagrangian particle model
655	!-- (only once during intermediate steps, because it uses an Euler-step)
656	!-- ### particle model should be moved before prognostic_equations, in order
657	!-- to regard droplet interactions directly
658	IF ( particle_advection .AND. &
659	simulated_time >= particle_advection_start .AND. &
660	intermediate_timestep_count == 1 ) THEN
661	CALL lpm
662	first_call_lpm = .FALSE.
663	ENDIF
664
665	!
666	!-- Interaction of droplets with temperature and specific humidity.
667	!-- Droplet condensation and evaporation is calculated within
668	!-- advec_particles.
669	IF ( cloud_droplets .AND. &
670	intermediate_timestep_count == intermediate_timestep_count_max )&
671	THEN
672	CALL interaction_droplets_ptq
673	ENDIF
674
675	!
676	!-- Exchange of ghost points (lateral boundary conditions)
677	IF ( .NOT. background_communication ) THEN
678
679	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
680
681	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
682	on_device = .TRUE. ! to be removed after complete porting
683	ELSE ! of ghost point exchange
684	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
685	ENDIF
686
687	CALL exchange_horiz( u_p, nbgp )
688	CALL exchange_horiz( v_p, nbgp )
689	CALL exchange_horiz( w_p, nbgp )
690	CALL exchange_horiz( pt_p, nbgp )
691	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
692	IF ( ocean ) THEN
693	CALL exchange_horiz( sa_p, nbgp )
694	CALL exchange_horiz( rho, nbgp )
695	CALL exchange_horiz( prho, nbgp )
696	ENDIF
697	IF ( humidity ) THEN
698	CALL exchange_horiz( q_p, nbgp )
699	IF ( cloud_physics .AND. microphysics_seifert ) THEN
700	CALL exchange_horiz( qr_p, nbgp )
701	CALL exchange_horiz( nr_p, nbgp )
702	ENDIF
703	ENDIF
704	IF ( cloud_droplets ) THEN
705	CALL exchange_horiz( ql, nbgp )
706	CALL exchange_horiz( ql_c, nbgp )
707	CALL exchange_horiz( ql_v, nbgp )
708	CALL exchange_horiz( ql_vp, nbgp )
709	ENDIF
710	IF ( wang_kernel .OR. collision_turbulence .OR. &
711	use_sgs_for_particles ) THEN
712	CALL exchange_horiz( diss, nbgp )
713	ENDIF
714	IF ( passive_scalar ) CALL exchange_horiz( s_p, nbgp )
715
716	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
717	on_device = .FALSE. ! to be removed after complete porting
718	ELSE ! of ghost point exchange
719	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
720	ENDIF
721
722	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
723
724	ENDIF
725
726	!
727	!-- Boundary conditions for the prognostic quantities (except of the
728	!-- velocities at the outflow in case of a non-cyclic lateral wall)
729	CALL boundary_conds
730
731	!
732	!-- Swap the time levels in preparation for the next time step.
733	CALL swap_timelevel
734
735	IF ( nested_run ) THEN
736
737	CALL cpu_log( log_point(60), 'nesting', 'start' )
738	!
739	!-- Domain nesting. The data transfer subroutines pmci_parent_datatrans
740	!-- and pmci_child_datatrans are called inside the wrapper
741	!-- subroutine pmci_datatrans according to the control parameters
742	!-- nesting_mode and nesting_datatransfer_mode.
743	!-- TO_DO: why is nesting_mode given as a parameter here?
744	CALL pmci_datatrans( nesting_mode )
745
746	IF ( TRIM( nesting_mode ) == 'two-way' .OR. &
747	nesting_mode == 'vertical' ) THEN
748	!
749	!-- Exchange_horiz is needed for all parent-domains after the
750	!-- anterpolation
751	CALL exchange_horiz( u, nbgp )
752	CALL exchange_horiz( v, nbgp )
753	CALL exchange_horiz( w, nbgp )
754	IF ( .NOT. neutral ) CALL exchange_horiz( pt, nbgp )
755	IF ( humidity ) CALL exchange_horiz( q, nbgp )
756	IF ( passive_scalar ) CALL exchange_horiz( s, nbgp )
757	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
758	ENDIF
759	!
760	!-- Correct the w top-BC in nest domains to ensure mass conservation.
761	!-- This action must never be done for the root domain. Vertical
762	!-- nesting implies mass conservation.
763	IF ( nest_domain ) THEN
764	CALL pmci_ensure_nest_mass_conservation
765	ENDIF
766
767	CALL cpu_log( log_point(60), 'nesting', 'stop' )
768
769	ENDIF
770
771	!
772	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
773	!-- when a sloping surface is used
774	IF ( sloping_surface ) THEN
775	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
776	pt_slope_offset
777	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
778	pt_slope_offset
779	ENDIF
780
781	!
782	!-- Impose a turbulent inflow using the recycling method
783	IF ( turbulent_inflow ) CALL inflow_turbulence
784
785	!
786	!-- Impose a random perturbation on the horizontal velocity field
787	IF ( create_disturbances .AND. &
788	( call_psolver_at_all_substeps .AND. &
789	intermediate_timestep_count == intermediate_timestep_count_max )&
790	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
791	intermediate_timestep_count == 1 ) ) &
792	THEN
793	time_disturb = time_disturb + dt_3d
794	IF ( time_disturb >= dt_disturb ) THEN
795	!$acc update host( u, v )
796	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
797	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
798	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
799	CALL disturb_field( nzb_u_inner, tend, u )
800	CALL disturb_field( nzb_v_inner, tend, v )
801	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
802	!
803	!-- Runs with a non-cyclic lateral wall need perturbations
804	!-- near the inflow throughout the whole simulation
805	dist_range = 1
806	CALL disturb_field( nzb_u_inner, tend, u )
807	CALL disturb_field( nzb_v_inner, tend, v )
808	dist_range = 0
809	ENDIF
810	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
811	!$acc update device( u, v )
812	time_disturb = time_disturb - dt_disturb
813	ENDIF
814	ENDIF
815
816	!
817	!-- Reduce the velocity divergence via the equation for perturbation
818	!-- pressure.
819	IF ( intermediate_timestep_count == 1 .OR. &
820	call_psolver_at_all_substeps ) THEN
821	CALL pres
822	ENDIF
823
824	!
825	!-- If required, compute liquid water content
826	IF ( cloud_physics ) THEN
827	CALL calc_liquid_water_content
828	!$acc update device( ql )
829	ENDIF
830	!
831	!-- If required, compute virtual potential temperature
832	IF ( humidity ) THEN
833	CALL compute_vpt
834	!$acc update device( vpt )
835	ENDIF
836
837	!
838	!-- Compute the diffusion quantities
839	IF ( .NOT. constant_diffusion ) THEN
840
841	!
842	!-- Determine surface fluxes shf and qsws and surface values
843	!-- pt_surface and q_surface in dependence on data from external
844	!-- file LSF_DATA respectively
845	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
846	intermediate_timestep_count == intermediate_timestep_count_max )&
847	THEN
848	CALL ls_forcing_surf ( simulated_time )
849	ENDIF
850
851	!
852	!-- First the vertical fluxes in the surface (constant flux) layer are computed
853	IF ( constant_flux_layer ) THEN
854	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
855	CALL surface_layer_fluxes
856	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
857	ENDIF
858
859	!
860	!-- If required, solve the energy balance for the surface and run soil
861	!-- model
862	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
863
864	CALL cpu_log( log_point(54), 'land_surface', 'start' )
865	CALL lsm_energy_balance
866	CALL lsm_soil_model
867	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
868	ENDIF
869	!
870	!-- Compute the diffusion coefficients
871	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
872	IF ( .NOT. humidity ) THEN
873	IF ( ocean ) THEN
874	CALL diffusivities( prho, prho_reference )
875	ELSE
876	CALL diffusivities( pt, pt_reference )
877	ENDIF
878	ELSE
879	CALL diffusivities( vpt, pt_reference )
880	ENDIF
881	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
882
883	ENDIF
884
885	!
886	!-- If required, calculate radiative fluxes and heating rates
887	IF ( radiation .AND. intermediate_timestep_count &
888	== intermediate_timestep_count_max .AND. simulated_time > &
889	skip_time_do_radiation ) THEN
890
891	time_radiation = time_radiation + dt_3d
892
893	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
894	THEN
895
896	CALL cpu_log( log_point(50), 'radiation', 'start' )
897
898	IF ( .NOT. force_radiation_call ) THEN
899	time_radiation = time_radiation - dt_radiation
900	ENDIF
901
902	IF ( radiation_scheme == 'clear-sky' ) THEN
903	CALL radiation_clearsky
904	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
905	CALL radiation_rrtmg
906	ELSE
907	CALL radiation_constant
908	ENDIF
909
910	CALL cpu_log( log_point(50), 'radiation', 'stop' )
911	ENDIF
912	ENDIF
913
914	ENDDO ! Intermediate step loop
915
916	!
917	!-- Increase simulation time and output times
918	nr_timesteps_this_run = nr_timesteps_this_run + 1
919	current_timestep_number = current_timestep_number + 1
920	simulated_time = simulated_time + dt_3d
921	simulated_time_chr = time_to_string( simulated_time )
922	time_since_reference_point = simulated_time - coupling_start_time
923
924
925
926	IF ( simulated_time >= skip_time_data_output_av ) THEN
927	time_do_av = time_do_av + dt_3d
928	ENDIF
929	IF ( simulated_time >= skip_time_do2d_xy ) THEN
930	time_do2d_xy = time_do2d_xy + dt_3d
931	ENDIF
932	IF ( simulated_time >= skip_time_do2d_xz ) THEN
933	time_do2d_xz = time_do2d_xz + dt_3d
934	ENDIF
935	IF ( simulated_time >= skip_time_do2d_yz ) THEN
936	time_do2d_yz = time_do2d_yz + dt_3d
937	ENDIF
938	IF ( simulated_time >= skip_time_do3d ) THEN
939	time_do3d = time_do3d + dt_3d
940	ENDIF
941	DO mid = 1, masks
942	IF ( simulated_time >= skip_time_domask(mid) ) THEN
943	time_domask(mid)= time_domask(mid) + dt_3d
944	ENDIF
945	ENDDO
946	time_dvrp = time_dvrp + dt_3d
947	IF ( simulated_time >= skip_time_dosp ) THEN
948	time_dosp = time_dosp + dt_3d
949	ENDIF
950	time_dots = time_dots + dt_3d
951	IF ( .NOT. first_call_lpm ) THEN
952	time_dopts = time_dopts + dt_3d
953	ENDIF
954	IF ( simulated_time >= skip_time_dopr ) THEN
955	time_dopr = time_dopr + dt_3d
956	ENDIF
957	time_dopr_listing = time_dopr_listing + dt_3d
958	time_run_control = time_run_control + dt_3d
959
960	!
961	!-- Data exchange between coupled models
962	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
963	time_coupling = time_coupling + dt_3d
964
965	!
966	!-- In case of model termination initiated by the local model
967	!-- (terminate_coupled > 0), the coupler must be skipped because it would
968	!-- cause an MPI intercomminucation hang.
969	!-- If necessary, the coupler will be called at the beginning of the
970	!-- next restart run.
971	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
972	CALL surface_coupler
973	time_coupling = time_coupling - dt_coupling
974	ENDDO
975	ENDIF
976
977	!
978	!-- Execute user-defined actions
979	CALL user_actions( 'after_integration' )
980
981	!
982	!-- If Galilei transformation is used, determine the distance that the
983	!-- model has moved so far
984	IF ( galilei_transformation ) THEN
985	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
986	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
987	ENDIF
988
989	!
990	!-- Check, if restart is necessary (because cpu-time is expiring or
991	!-- because it is forced by user) and set stop flag
992	!-- This call is skipped if the remote model has already initiated a restart.
993	IF ( .NOT. terminate_run ) CALL check_for_restart
994
995	!
996	!-- Carry out statistical analysis and output at the requested output times.
997	!-- The MOD function is used for calculating the output time counters (like
998	!-- time_dopr) in order to regard a possible decrease of the output time
999	!-- interval in case of restart runs
1000
1001	!
1002	!-- Set a flag indicating that so far no statistics have been created
1003	!-- for this time step
1004	flow_statistics_called = .FALSE.
1005
1006	!
1007	!-- If required, call flow_statistics for averaging in time
1008	IF ( averaging_interval_pr /= 0.0_wp .AND. &
1009	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
1010	simulated_time >= skip_time_dopr ) THEN
1011	time_dopr_av = time_dopr_av + dt_3d
1012	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
1013	do_sum = .TRUE.
1014	time_dopr_av = MOD( time_dopr_av, &
1015	MAX( dt_averaging_input_pr, dt_3d ) )
1016	ENDIF
1017	ENDIF
1018	IF ( do_sum ) CALL flow_statistics
1019
1020	!
1021	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
1022	IF ( averaging_interval /= 0.0_wp .AND. &
1023	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
1024	simulated_time >= skip_time_data_output_av ) &
1025	THEN
1026	time_do_sla = time_do_sla + dt_3d
1027	IF ( time_do_sla >= dt_averaging_input ) THEN
1028	CALL sum_up_3d_data
1029	average_count_3d = average_count_3d + 1
1030	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
1031	ENDIF
1032	ENDIF
1033
1034	!
1035	!-- Calculate spectra for time averaging
1036	IF ( averaging_interval_sp /= 0.0_wp .AND. &
1037	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
1038	simulated_time >= skip_time_dosp ) THEN
1039	time_dosp_av = time_dosp_av + dt_3d
1040	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
1041	CALL calc_spectra
1042	time_dosp_av = MOD( time_dosp_av, &
1043	MAX( dt_averaging_input_pr, dt_3d ) )
1044	ENDIF
1045	ENDIF
1046
1047	!
1048	!-- Call flight module and output data
1049	IF ( virtual_flight ) THEN
1050	CALL flight_measurement
1051	CALL data_output_flight
1052	ENDIF
1053
1054	!
1055	!-- Profile output (ASCII) on file
1056	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1057	CALL print_1d
1058	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1059	dt_3d ) )
1060	ENDIF
1061
1062	!
1063	!-- Graphic output for PROFIL
1064	IF ( time_dopr >= dt_dopr ) THEN
1065	IF ( dopr_n /= 0 ) CALL data_output_profiles
1066	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1067	time_dopr_av = 0.0_wp ! due to averaging (see above)
1068	ENDIF
1069
1070	!
1071	!-- Graphic output for time series
1072	IF ( time_dots >= dt_dots ) THEN
1073	CALL data_output_tseries
1074	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1075	ENDIF
1076
1077	!
1078	!-- Output of spectra (formatted for use with PROFIL), in case of no
1079	!-- time averaging, spectra has to be calculated before
1080	IF ( time_dosp >= dt_dosp ) THEN
1081	IF ( average_count_sp == 0 ) CALL calc_spectra
1082	CALL data_output_spectra
1083	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1084	ENDIF
1085
1086	!
1087	!-- 2d-data output (cross-sections)
1088	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1089	CALL data_output_2d( 'xy', 0 )
1090	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1091	ENDIF
1092	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1093	CALL data_output_2d( 'xz', 0 )
1094	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1095	ENDIF
1096	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1097	CALL data_output_2d( 'yz', 0 )
1098	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1099	ENDIF
1100
1101	!
1102	!-- 3d-data output (volume data)
1103	IF ( time_do3d >= dt_do3d ) THEN
1104	CALL data_output_3d( 0 )
1105	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1106	ENDIF
1107
1108	!
1109	!-- Masked data output
1110	DO mid = 1, masks
1111	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1112	CALL data_output_mask( 0 )
1113	time_domask(mid) = MOD( time_domask(mid), &
1114	MAX( dt_domask(mid), dt_3d ) )
1115	ENDIF
1116	ENDDO
1117
1118	!
1119	!-- Output of time-averaged 2d/3d/masked data
1120	IF ( time_do_av >= dt_data_output_av ) THEN
1121	CALL average_3d_data
1122	CALL data_output_2d( 'xy', 1 )
1123	CALL data_output_2d( 'xz', 1 )
1124	CALL data_output_2d( 'yz', 1 )
1125	CALL data_output_3d( 1 )
1126	DO mid = 1, masks
1127	CALL data_output_mask( 1 )
1128	ENDDO
1129	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1130	ENDIF
1131
1132	!
1133	!-- Output of particle time series
1134	IF ( particle_advection ) THEN
1135	IF ( time_dopts >= dt_dopts .OR. &
1136	( simulated_time >= particle_advection_start .AND. &
1137	first_call_lpm ) ) THEN
1138	CALL data_output_ptseries
1139	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1140	ENDIF
1141	ENDIF
1142
1143	!
1144	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1145	#if defined( __dvrp_graphics )
1146	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1147	#endif
1148	IF ( time_dvrp >= dt_dvrp ) THEN
1149	CALL data_output_dvrp
1150	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1151	ENDIF
1152	#if defined( __dvrp_graphics )
1153	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1154	#endif
1155
1156	!
1157	!-- If required, set the heat flux for the next time step at a random value
1158	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
1159
1160	!
1161	!-- Execute user-defined actions
1162	CALL user_actions( 'after_timestep' )
1163
1164	!
1165	!-- Determine size of next time step. Save timestep dt_3d because it is
1166	!-- newly calculated in routine timestep, but required further below for
1167	!-- steering the run control output interval
1168	dt_3d_old = dt_3d
1169	CALL timestep
1170
1171	!
1172	!-- Synchronize the timestep in case of nested run.
1173	IF ( nested_run ) THEN
1174	!
1175	!-- Synchronize by unifying the time step.
1176	!-- Global minimum of all time-steps is used for all.
1177	CALL pmci_synchronize
1178	ENDIF
1179
1180	!
1181	!-- Computation and output of run control parameters.
1182	!-- This is also done whenever perturbations have been imposed
1183	IF ( time_run_control >= dt_run_control .OR. &
1184	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
1185	THEN
1186	! IF ( current_timestep_number == 1 ) THEN
1187	! IF ( nxl < 7 .AND. nxr > 7 .AND. nys < 7 .AND. nyn > 7 ) THEN
1188	! u(10,7,7) = 0.55
1189	! ENDIF
1190	! PRINT*, 'calculating minmax'
1191	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, u, &
1192	! 'abs', 0.0_wp, u_max, u_max_ijk )
1193	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, v, &
1194	! 'abs', 0.0_wp, v_max, v_max_ijk )
1195	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, w, &
1196	! 'abs', 0.0_wp, w_max, w_max_ijk )
1197	! PRINT*, 'calculated u_max = ', u_max, ' myid = ', myid
1198	! ENDIF
1199	CALL run_control
1200	IF ( time_run_control >= dt_run_control ) THEN
1201	time_run_control = MOD( time_run_control, &
1202	MAX( dt_run_control, dt_3d_old ) )
1203	ENDIF
1204	ENDIF
1205
1206	!
1207	!-- Output elapsed simulated time in form of a progress bar on stdout
1208	IF ( myid == 0 ) CALL output_progress_bar
1209
1210	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1211
1212
1213	ENDDO ! time loop
1214
1215	IF ( myid == 0 ) CALL finish_progress_bar
1216
1217	#if defined( __dvrp_graphics )
1218	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1219	#endif
1220
1221	CALL location_message( 'finished time-stepping', .TRUE. )
1222
1223	END SUBROUTINE time_integration

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