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source: palm/trunk/SOURCE/time_integration.f90 @ 1957

Last change on this file since 1957 was 1957, checked in by suehring, 8 years ago
flight module added
Property svn:keywords set to `Id`
File size: 46.6 KB

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

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