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source: palm/trunk/SOURCE/time_integration.f90 @ 1927

Last change on this file since 1927 was 1927, checked in by hellstea, 8 years ago
Error check for overlapping parallel nests added
Property svn:keywords set to `Id`
File size: 46.3 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	! Synchronization moved before CALL run_control. Exchange_horiz for pt after
22	! CALL pmci_datatrans is now only called if ( .NOT. neutral ).
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: time_integration.f90 1927 2016-06-07 11:56:53Z hellstea $
27	!
28	! 1918 2016-05-27 14:35:57Z raasch
29	! determination of time step moved to the end of the time step loop,
30	! the first time step is now always calculated before the time step loop (i.e.
31	! also in case of restart runs)
32	!
33	! 1914 2016-05-26 14:44:07Z witha
34	! Added call for wind turbine model
35	!
36	! 1878 2016-04-19 12:30:36Z hellstea
37	! Synchronization for nested runs rewritten
38	!
39	! 1853 2016-04-11 09:00:35Z maronga
40	! Adjusted for use with radiation_scheme = constant
41	!
42	! 1849 2016-04-08 11:33:18Z hoffmann
43	! Adapted for modularization of microphysics
44	!
45	! 1833 2016-04-07 14:23:03Z raasch
46	! spectrum renamed spectra_mod, spectra related variables moved to spectra_mod
47	!
48	! 1831 2016-04-07 13:15:51Z hoffmann
49	! turbulence renamed collision_turbulence
50	!
51	! 1822 2016-04-07 07:49:42Z hoffmann
52	! icloud_scheme replaced by microphysics_*
53	!
54	! 1808 2016-04-05 19:44:00Z raasch
55	! output message in case unscheduled radiation calls removed
56	!
57	! 1797 2016-03-21 16:50:28Z raasch
58	! introduction of different datatransfer modes
59	!
60	! 1791 2016-03-11 10:41:25Z raasch
61	! call of pmci_update_new removed
62	!
63	! 1786 2016-03-08 05:49:27Z raasch
64	! +module spectrum
65	!
66	! 1783 2016-03-06 18:36:17Z raasch
67	! switch back of netcdf data format for mask output moved to the mask output
68	! routine
69	!
70	! 1781 2016-03-03 15:12:23Z raasch
71	! some pmc calls removed at the beginning (before timeloop),
72	! pmc initialization moved to the main program
73	!
74	! 1764 2016-02-28 12:45:19Z raasch
75	! PMC_ACTIVE flags removed,
76	! bugfix: nest synchronization after first call of timestep
77	!
78	! 1762 2016-02-25 12:31:13Z hellstea
79	! Introduction of nested domain feature
80	!
81	! 1736 2015-12-04 08:56:33Z raasch
82	! no perturbations added to total domain if energy limit has been set zero
83	!
84	! 1691 2015-10-26 16:17:44Z maronga
85	! Added option for spin-ups without land surface and radiation models. Moved calls
86	! for radiation and lan surface schemes.
87	!
88	! 1682 2015-10-07 23:56:08Z knoop
89	! Code annotations made doxygen readable
90	!
91	! 1671 2015-09-25 03:29:37Z raasch
92	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
93	! for particles
94	!
95	! 1585 2015-04-30 07:05:52Z maronga
96	! Moved call of radiation scheme. Added support for RRTM
97	!
98	! 1551 2015-03-03 14:18:16Z maronga
99	! Added interface for different radiation schemes.
100	!
101	! 1496 2014-12-02 17:25:50Z maronga
102	! Added calls for the land surface model and radiation scheme
103	!
104	! 1402 2014-05-09 14:25:13Z raasch
105	! location messages modified
106	!
107	! 1384 2014-05-02 14:31:06Z raasch
108	! location messages added
109	!
110	! 1380 2014-04-28 12:40:45Z heinze
111	! CALL of nudge_ref added
112	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
113	!
114	! 1365 2014-04-22 15:03:56Z boeske
115	! Reset sums_ls_l to zero at each timestep
116	! +sums_ls_l
117	! Calculation of reference state (previously in subroutine calc_mean_profile)
118
119	! 1342 2014-03-26 17:04:47Z kanani
120	! REAL constants defined as wp-kind
121	!
122	! 1320 2014-03-20 08:40:49Z raasch
123	! ONLY-attribute added to USE-statements,
124	! kind-parameters added to all INTEGER and REAL declaration statements,
125	! kinds are defined in new module kinds,
126	! old module precision_kind is removed,
127	! revision history before 2012 removed,
128	! comment fields (!:) to be used for variable explanations added to
129	! all variable declaration statements
130	! 1318 2014-03-17 13:35:16Z raasch
131	! module interfaces removed
132	!
133	! 1308 2014-03-13 14:58:42Z fricke
134	! +netcdf_data_format_save
135	! For masked data, parallel netcdf output is not tested so far, hence
136	! netcdf_data_format is switched back to non-paralell output.
137	!
138	! 1276 2014-01-15 13:40:41Z heinze
139	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
140	!
141	! 1257 2013-11-08 15:18:40Z raasch
142	! acc-update-host directive for timestep removed
143	!
144	! 1241 2013-10-30 11:36:58Z heinze
145	! Generalize calc_mean_profile for wider use
146	! Determine shf and qsws in dependence on data from LSF_DATA
147	! Determine ug and vg in dependence on data from LSF_DATA
148	! 1221 2013-09-10 08:59:13Z raasch
149	! host update of arrays before timestep is called
150	!
151	! 1179 2013-06-14 05:57:58Z raasch
152	! mean profiles for reference state are only calculated if required,
153	! small bugfix for background communication
154	!
155	! 1171 2013-05-30 11:27:45Z raasch
156	! split of prognostic_equations deactivated (comment lines), for the time being
157	!
158	! 1128 2013-04-12 06:19:32Z raasch
159	! asynchronous transfer of ghost point data realized for acc-optimized version:
160	! prognostic_equations are first called two times for those points required for
161	! the left-right and north-south exchange, respectively, and then for the
162	! remaining points,
163	! those parts requiring global communication moved from prognostic_equations to
164	! here
165	!
166	! 1115 2013-03-26 18:16:16Z hoffmann
167	! calculation of qr and nr is restricted to precipitation
168	!
169	! 1113 2013-03-10 02:48:14Z raasch
170	! GPU-porting of boundary conditions,
171	! openACC directives updated
172	! formal parameter removed from routine boundary_conds
173	!
174	! 1111 2013-03-08 23:54:10Z raasch
175	! +internal timestep counter for cpu statistics added,
176	! openACC directives updated
177	!
178	! 1092 2013-02-02 11:24:22Z raasch
179	! unused variables removed
180	!
181	! 1065 2012-11-22 17:42:36Z hoffmann
182	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
183	!
184	! 1053 2012-11-13 17:11:03Z hoffmann
185	! exchange of ghost points for nr, qr added
186	!
187	! 1036 2012-10-22 13:43:42Z raasch
188	! code put under GPL (PALM 3.9)
189	!
190	! 1019 2012-09-28 06:46:45Z raasch
191	! non-optimized version of prognostic_equations removed
192	!
193	! 1015 2012-09-27 09:23:24Z raasch
194	! +call of prognostic_equations_acc
195	!
196	! 1001 2012-09-13 14:08:46Z raasch
197	! all actions concerning leapfrog- and upstream-spline-scheme removed
198	!
199	! 849 2012-03-15 10:35:09Z raasch
200	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
201	!
202	! 825 2012-02-19 03:03:44Z raasch
203	! wang_collision_kernel renamed wang_kernel
204	!
205	! Revision 1.1 1997/08/11 06:19:04 raasch
206	! Initial revision
207	!
208	!
209	! Description:
210	! ------------
211	!> Integration in time of the model equations, statistical analysis and graphic
212	!> output
213	!------------------------------------------------------------------------------!
214	SUBROUTINE time_integration
215
216
217	USE advec_ws, &
218	ONLY: ws_statistics
219
220	USE arrays_3d, &
221	ONLY: diss, dzu, e, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, &
222	ql, ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, &
223	u, u_p, v, vpt, v_p, w, w_p
224
225	USE calc_mean_profile_mod, &
226	ONLY: calc_mean_profile
227
228	USE control_parameters, &
229	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
230	averaging_interval, averaging_interval_pr, &
231	bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
232	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
233	cloud_physics, constant_flux_layer, constant_heatflux, &
234	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
235	coupling_start_time, current_timestep_number, &
236	disturbance_created, disturbance_energy_limit, dist_range, &
237	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
238	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
239	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
240	dt_dopr_listing, dt_dots, dt_dvrp, dt_run_control, &
241	end_time, first_call_lpm, galilei_transformation, humidity, &
242	intermediate_timestep_count, &
243	intermediate_timestep_count_max, large_scale_forcing, &
244	loop_optimization, lsf_surf, lsf_vert, masks, &
245	microphysics_seifert, mid, nest_domain, &
246	neutral, nr_timesteps_this_run, nudging, &
247	ocean, on_device, passive_scalar, &
248	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
249	run_coupled, simulated_time, simulated_time_chr, &
250	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
251	skip_time_do3d, skip_time_domask, skip_time_dopr, &
252	skip_time_data_output_av, sloping_surface, &
253	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
254	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
255	time_do3d, time_domask, time_dopr, time_dopr_av, &
256	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
257	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
258	time_run_control, time_since_reference_point, &
259	turbulent_inflow, use_initial_profile_as_reference, &
260	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
261	ws_scheme_sca
262
263	USE cpulog, &
264	ONLY: cpu_log, log_point, log_point_s
265
266	USE indices, &
267	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
268	nxrg, nyn, nyng, nys, nysg, nzb, nzt, nzb_u_inner, nzb_v_inner
269
270	USE interaction_droplets_ptq_mod, &
271	ONLY: interaction_droplets_ptq
272
273	USE interfaces
274
275	USE kinds
276
277	USE land_surface_model_mod, &
278	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
279	skip_time_do_lsm
280
281	USE ls_forcing_mod, &
282	ONLY: ls_forcing_surf, ls_forcing_vert
283
284	USE microphysics_mod, &
285	ONLY: collision_turbulence
286
287	USE nudge_mod, &
288	ONLY: calc_tnudge, nudge_ref
289
290	USE particle_attributes, &
291	ONLY: particle_advection, particle_advection_start, &
292	use_sgs_for_particles, wang_kernel
293
294	USE pegrid
295
296	USE pmc_interface, &
297	ONLY: client_to_server, nested_run, nesting_mode, &
298	pmci_datatrans, pmci_ensure_nest_mass_conservation, &
299	pmci_synchronize, server_to_client
300
301	USE production_e_mod, &
302	ONLY: production_e_init
303
304	USE progress_bar, &
305	ONLY: finish_progress_bar, output_progress_bar
306
307	USE prognostic_equations_mod, &
308	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
309	prognostic_equations_vector
310
311	USE radiation_model_mod, &
312	ONLY: dt_radiation, force_radiation_call, radiation, &
313	radiation_clearsky, radiation_constant, radiation_rrtmg, &
314	radiation_scheme, skip_time_do_radiation, time_radiation
315
316	USE spectra_mod, &
317	ONLY: average_count_sp, averaging_interval_sp, calc_spectra, dt_dosp, &
318	skip_time_dosp
319
320	USE statistics, &
321	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l, u_max, &
322	u_max_ijk, v_max, v_max_ijk, w_max, w_max_ijk
323
324	USE surface_layer_fluxes_mod, &
325	ONLY: surface_layer_fluxes
326
327	USE user_actions_mod, &
328	ONLY: user_actions
329
330	USE wind_turbine_model_mod, &
331	ONLY: wind_turbine, wtm_forces
332
333	IMPLICIT NONE
334
335	CHARACTER (LEN=9) :: time_to_string !<
336
337	REAL(wp) :: dt_3d_old !< temporary storage of timestep to be used for
338	!< steering of run control output interval
339
340	!
341	!-- At beginning determine the first time step
342	CALL timestep
343
344	!
345	!-- Synchronize the timestep in case of nested run.
346	IF ( nested_run ) THEN
347	!
348	!-- Synchronization by unifying the time step.
349	!-- Global minimum of all time-steps is used for all.
350	CALL pmci_synchronize
351	ENDIF
352
353	!
354	!-- Determine and print out the run control quantities before the first time
355	!-- step of this run. For the initial run, some statistics (e.g. divergence)
356	!-- need to be determined first.
357	IF ( simulated_time == 0.0_wp ) CALL flow_statistics
358	CALL run_control
359
360	!
361	!-- Data exchange between coupled models in case that a call has been omitted
362	!-- at the end of the previous run of a job chain.
363	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
364	!
365	!-- In case of model termination initiated by the local model the coupler
366	!-- must not be called because this would again cause an MPI hang.
367	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
368	CALL surface_coupler
369	time_coupling = time_coupling - dt_coupling
370	ENDDO
371	IF (time_coupling == 0.0_wp .AND. &
372	time_since_reference_point < dt_coupling ) &
373	THEN
374	time_coupling = time_since_reference_point
375	ENDIF
376	ENDIF
377
378	#if defined( __dvrp_graphics )
379	!
380	!-- Time measurement with dvrp software
381	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
382	#endif
383
384	CALL location_message( 'start with time-stepping', .TRUE. )
385	!
386	!-- Start of the time loop
387	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
388	.NOT. terminate_run )
389
390	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
391
392	!
393	!-- Determine ug, vg and w_subs in dependence on data from external file
394	!-- LSF_DATA
395	IF ( large_scale_forcing .AND. lsf_vert ) THEN
396	CALL ls_forcing_vert ( simulated_time )
397	sums_ls_l = 0.0_wp
398	ENDIF
399
400	!
401	!-- Set pt_init and q_init to the current profiles taken from
402	!-- NUDGING_DATA
403	IF ( nudging ) THEN
404	CALL nudge_ref ( simulated_time )
405	!
406	!-- Store temperature gradient at the top boundary for possible Neumann
407	!-- boundary condition
408	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
409	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
410	ENDIF
411
412	!
413	!-- Execute the user-defined actions
414	CALL user_actions( 'before_timestep' )
415
416	!
417	!-- Calculate forces by wind turbines
418	IF ( wind_turbine ) THEN
419
420	CALL cpu_log( log_point(55), 'wind_turbine', 'start' )
421
422	CALL wtm_forces
423
424	CALL cpu_log( log_point(55), 'wind_turbine', 'stop' )
425
426	ENDIF
427
428	!
429	!-- Start of intermediate step loop
430	intermediate_timestep_count = 0
431	DO WHILE ( intermediate_timestep_count < &
432	intermediate_timestep_count_max )
433
434	intermediate_timestep_count = intermediate_timestep_count + 1
435
436	!
437	!-- Set the steering factors for the prognostic equations which depend
438	!-- on the timestep scheme
439	CALL timestep_scheme_steering
440
441	!
442	!-- Calculate those variables needed in the tendency terms which need
443	!-- global communication
444	IF ( .NOT. use_single_reference_value .AND. &
445	.NOT. use_initial_profile_as_reference ) THEN
446	!
447	!-- Horizontally averaged profiles to be used as reference state in
448	!-- buoyancy terms (WARNING: only the respective last call of
449	!-- calc_mean_profile defines the reference state!)
450	IF ( .NOT. neutral ) THEN
451	CALL calc_mean_profile( pt, 4 )
452	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
453	ENDIF
454	IF ( ocean ) THEN
455	CALL calc_mean_profile( rho, 64 )
456	ref_state(:) = hom(:,1,64,0)
457	ENDIF
458	IF ( humidity ) THEN
459	CALL calc_mean_profile( vpt, 44 )
460	ref_state(:) = hom(:,1,44,0)
461	ENDIF
462
463	ENDIF
464
465	IF ( .NOT. constant_diffusion ) CALL production_e_init
466	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
467	intermediate_timestep_count == 1 ) CALL ws_statistics
468	!
469	!-- In case of nudging calculate current nudging time scale and horizontal
470	!-- means of u, v, pt and q
471	IF ( nudging ) THEN
472	CALL calc_tnudge( simulated_time )
473	CALL calc_mean_profile( u, 1 )
474	CALL calc_mean_profile( v, 2 )
475	CALL calc_mean_profile( pt, 4 )
476	CALL calc_mean_profile( q, 41 )
477	ENDIF
478
479	!
480	!-- Solve the prognostic equations. A fast cache optimized version with
481	!-- only one single loop is used in case of Piascek-Williams advection
482	!-- scheme. NEC vector machines use a different version, because
483	!-- in the other versions a good vectorization is prohibited due to
484	!-- inlining problems.
485	IF ( loop_optimization == 'cache' ) THEN
486	CALL prognostic_equations_cache
487	ELSEIF ( loop_optimization == 'vector' ) THEN
488	CALL prognostic_equations_vector
489	ELSEIF ( loop_optimization == 'acc' ) THEN
490	i_left = nxl; i_right = nxr
491	j_south = nys; j_north = nyn
492	CALL prognostic_equations_acc
493
494	! i_left = nxl; i_right = nxl+nbgp-1
495	! j_south = nys; j_north = nyn
496	! CALL prognostic_equations_acc
497	! i_left = nxr-nbgp+1; i_right = nxr
498	! j_south = nys; j_north = nyn
499	! CALL prognostic_equations_acc
500
501	!
502	!-- Exchange of ghost points (lateral boundary conditions)
503	IF ( background_communication ) THEN
504
505	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
506
507	send_receive = 'lr'
508	sendrecv_in_background = .TRUE.
509	req = 0
510	req_count = 0
511
512	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
513	on_device = .TRUE. ! to be removed after complete porting
514	ELSE ! of ghost point exchange
515	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
516	ENDIF
517
518	CALL exchange_horiz( u_p, nbgp )
519	CALL exchange_horiz( v_p, nbgp )
520	CALL exchange_horiz( w_p, nbgp )
521	CALL exchange_horiz( pt_p, nbgp )
522	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
523	IF ( ocean ) THEN
524	CALL exchange_horiz( sa_p, nbgp )
525	CALL exchange_horiz( rho, nbgp )
526	CALL exchange_horiz( prho, nbgp )
527	ENDIF
528	IF (humidity .OR. passive_scalar) THEN
529	CALL exchange_horiz( q_p, nbgp )
530	IF ( cloud_physics .AND. microphysics_seifert ) THEN
531	CALL exchange_horiz( qr_p, nbgp )
532	CALL exchange_horiz( nr_p, nbgp )
533	ENDIF
534	ENDIF
535	IF ( cloud_droplets ) THEN
536	CALL exchange_horiz( ql, nbgp )
537	CALL exchange_horiz( ql_c, nbgp )
538	CALL exchange_horiz( ql_v, nbgp )
539	CALL exchange_horiz( ql_vp, nbgp )
540	ENDIF
541	IF ( wang_kernel .OR. collision_turbulence .OR. &
542	use_sgs_for_particles ) THEN
543	CALL exchange_horiz( diss, nbgp )
544	ENDIF
545
546	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
547	on_device = .FALSE. ! to be removed after complete porting
548	ELSE ! of ghost point exchange
549	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
550	ENDIF
551
552	sendrecv_in_background = .FALSE.
553
554	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
555
556	ENDIF
557
558	! i_left = nxl+nbgp; i_right = nxr-nbgp
559	! j_south = nys; j_north = nys+nbgp-1
560	! CALL prognostic_equations_acc
561	! i_left = nxl+nbgp; i_right = nxr-nbgp
562	! j_south = nyn-nbgp+1; j_north = nyn
563	! CALL prognostic_equations_acc
564
565	IF ( background_communication ) THEN
566	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
567	#if defined( __parallel )
568	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
569	#endif
570	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
571
572	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
573
574	send_receive = 'ns'
575	sendrecv_in_background = .TRUE.
576	req = 0
577	req_count = 0
578
579	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
580	on_device = .TRUE. ! to be removed after complete porting
581	ELSE ! of ghost point exchange
582	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
583	ENDIF
584
585	CALL exchange_horiz( u_p, nbgp )
586	CALL exchange_horiz( v_p, nbgp )
587	CALL exchange_horiz( w_p, nbgp )
588	CALL exchange_horiz( pt_p, nbgp )
589	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
590	IF ( ocean ) THEN
591	CALL exchange_horiz( sa_p, nbgp )
592	CALL exchange_horiz( rho, nbgp )
593	CALL exchange_horiz( prho, nbgp )
594	ENDIF
595	IF (humidity .OR. passive_scalar) THEN
596	CALL exchange_horiz( q_p, nbgp )
597	IF ( cloud_physics .AND. microphysics_seifert ) THEN
598	CALL exchange_horiz( qr_p, nbgp )
599	CALL exchange_horiz( nr_p, nbgp )
600	ENDIF
601	ENDIF
602	IF ( cloud_droplets ) THEN
603	CALL exchange_horiz( ql, nbgp )
604	CALL exchange_horiz( ql_c, nbgp )
605	CALL exchange_horiz( ql_v, nbgp )
606	CALL exchange_horiz( ql_vp, nbgp )
607	ENDIF
608	IF ( wang_kernel .OR. collision_turbulence .OR. &
609	use_sgs_for_particles ) THEN
610	CALL exchange_horiz( diss, nbgp )
611	ENDIF
612
613	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
614	on_device = .FALSE. ! to be removed after complete porting
615	ELSE ! of ghost point exchange
616	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
617	ENDIF
618
619	sendrecv_in_background = .FALSE.
620
621	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
622
623	ENDIF
624
625	! i_left = nxl+nbgp; i_right = nxr-nbgp
626	! j_south = nys+nbgp; j_north = nyn-nbgp
627	! CALL prognostic_equations_acc
628
629	IF ( background_communication ) THEN
630	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
631	#if defined( __parallel )
632	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
633	#endif
634	send_receive = 'al'
635	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
636	ENDIF
637
638	ENDIF
639
640	!
641	!-- Particle transport/physics with the Lagrangian particle model
642	!-- (only once during intermediate steps, because it uses an Euler-step)
643	!-- ### particle model should be moved before prognostic_equations, in order
644	!-- to regard droplet interactions directly
645	IF ( particle_advection .AND. &
646	simulated_time >= particle_advection_start .AND. &
647	intermediate_timestep_count == 1 ) THEN
648	CALL lpm
649	first_call_lpm = .FALSE.
650	ENDIF
651
652	!
653	!-- Interaction of droplets with temperature and specific humidity.
654	!-- Droplet condensation and evaporation is calculated within
655	!-- advec_particles.
656	IF ( cloud_droplets .AND. &
657	intermediate_timestep_count == intermediate_timestep_count_max )&
658	THEN
659	CALL interaction_droplets_ptq
660	ENDIF
661
662	!
663	!-- Exchange of ghost points (lateral boundary conditions)
664	IF ( .NOT. background_communication ) THEN
665
666	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
667
668	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
669	on_device = .TRUE. ! to be removed after complete porting
670	ELSE ! of ghost point exchange
671	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
672	ENDIF
673
674	CALL exchange_horiz( u_p, nbgp )
675	CALL exchange_horiz( v_p, nbgp )
676	CALL exchange_horiz( w_p, nbgp )
677	CALL exchange_horiz( pt_p, nbgp )
678	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
679	IF ( ocean ) THEN
680	CALL exchange_horiz( sa_p, nbgp )
681	CALL exchange_horiz( rho, nbgp )
682	CALL exchange_horiz( prho, nbgp )
683	ENDIF
684	IF (humidity .OR. passive_scalar) THEN
685	CALL exchange_horiz( q_p, nbgp )
686	IF ( cloud_physics .AND. microphysics_seifert ) THEN
687	CALL exchange_horiz( qr_p, nbgp )
688	CALL exchange_horiz( nr_p, nbgp )
689	ENDIF
690	ENDIF
691	IF ( cloud_droplets ) THEN
692	CALL exchange_horiz( ql, nbgp )
693	CALL exchange_horiz( ql_c, nbgp )
694	CALL exchange_horiz( ql_v, nbgp )
695	CALL exchange_horiz( ql_vp, nbgp )
696	ENDIF
697	IF ( wang_kernel .OR. collision_turbulence .OR. &
698	use_sgs_for_particles ) THEN
699	CALL exchange_horiz( diss, nbgp )
700	ENDIF
701
702	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
703	on_device = .FALSE. ! to be removed after complete porting
704	ELSE ! of ghost point exchange
705	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
706	ENDIF
707
708	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
709
710	ENDIF
711
712	!
713	!-- Boundary conditions for the prognostic quantities (except of the
714	!-- velocities at the outflow in case of a non-cyclic lateral wall)
715	CALL boundary_conds
716
717	!
718	!-- Swap the time levels in preparation for the next time step.
719	CALL swap_timelevel
720
721	IF ( nested_run ) THEN
722
723	CALL cpu_log( log_point(60), 'nesting', 'start' )
724	!
725	!-- Domain nesting. The data transfer subroutines pmci_server_datatrans
726	!-- and pmci_client_datatatrans are called inside the wrapper
727	!-- subroutine pmci_datatrans according to the control parameters
728	!-- nesting_mode and nesting_datatransfer_mode.
729	!-- TO_DO: why is nesting_mode given as a parameter here?
730	CALL pmci_datatrans( nesting_mode )
731
732	IF ( nesting_mode == 'two-way' ) THEN
733	!
734	!-- Exchange_horiz is needed for all server-domains after the
735	!-- anterpolation
736	CALL exchange_horiz( u, nbgp )
737	CALL exchange_horiz( v, nbgp )
738	CALL exchange_horiz( w, nbgp )
739	IF ( .NOT. neutral ) THEN
740	CALL exchange_horiz( pt, nbgp )
741	ENDIF
742	IF ( humidity .OR. passive_scalar ) THEN
743	CALL exchange_horiz( q, nbgp )
744	ENDIF
745	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
746	ENDIF
747	!
748	!-- Correct the w top-BC in nest domains to ensure mass conservation.
749	!-- This action must never be done for the root domain.
750	IF ( nest_domain ) THEN
751	CALL pmci_ensure_nest_mass_conservation
752	ENDIF
753
754	CALL cpu_log( log_point(60), 'nesting', 'stop' )
755
756	ENDIF
757
758	!
759	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
760	!-- when a sloping surface is used
761	IF ( sloping_surface ) THEN
762	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
763	pt_slope_offset
764	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
765	pt_slope_offset
766	ENDIF
767
768	!
769	!-- Impose a turbulent inflow using the recycling method
770	IF ( turbulent_inflow ) CALL inflow_turbulence
771
772	!
773	!-- Impose a random perturbation on the horizontal velocity field
774	IF ( create_disturbances .AND. &
775	( call_psolver_at_all_substeps .AND. &
776	intermediate_timestep_count == intermediate_timestep_count_max )&
777	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
778	intermediate_timestep_count == 1 ) ) &
779	THEN
780	time_disturb = time_disturb + dt_3d
781	IF ( time_disturb >= dt_disturb ) THEN
782	!$acc update host( u, v )
783	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
784	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
785	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
786	CALL disturb_field( nzb_u_inner, tend, u )
787	CALL disturb_field( nzb_v_inner, tend, v )
788	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
789	!
790	!-- Runs with a non-cyclic lateral wall need perturbations
791	!-- near the inflow throughout the whole simulation
792	dist_range = 1
793	CALL disturb_field( nzb_u_inner, tend, u )
794	CALL disturb_field( nzb_v_inner, tend, v )
795	dist_range = 0
796	ENDIF
797	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
798	!$acc update device( u, v )
799	time_disturb = time_disturb - dt_disturb
800	ENDIF
801	ENDIF
802
803	!
804	!-- Reduce the velocity divergence via the equation for perturbation
805	!-- pressure.
806	IF ( intermediate_timestep_count == 1 .OR. &
807	call_psolver_at_all_substeps ) THEN
808	CALL pres
809	ENDIF
810
811	!
812	!-- If required, compute liquid water content
813	IF ( cloud_physics ) THEN
814	CALL calc_liquid_water_content
815	!$acc update device( ql )
816	ENDIF
817	!
818	!-- If required, compute virtual potential temperature
819	IF ( humidity ) THEN
820	CALL compute_vpt
821	!$acc update device( vpt )
822	ENDIF
823
824	!
825	!-- Compute the diffusion quantities
826	IF ( .NOT. constant_diffusion ) THEN
827
828	!
829	!-- Determine surface fluxes shf and qsws and surface values
830	!-- pt_surface and q_surface in dependence on data from external
831	!-- file LSF_DATA respectively
832	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
833	intermediate_timestep_count == intermediate_timestep_count_max )&
834	THEN
835	CALL ls_forcing_surf ( simulated_time )
836	ENDIF
837
838	!
839	!-- First the vertical fluxes in the surface (constant flux) layer are computed
840	IF ( constant_flux_layer ) THEN
841	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
842	CALL surface_layer_fluxes
843	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
844	ENDIF
845
846	!
847	!-- If required, solve the energy balance for the surface and run soil
848	!-- model
849	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
850
851	CALL cpu_log( log_point(54), 'land_surface', 'start' )
852	CALL lsm_energy_balance
853	CALL lsm_soil_model
854	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
855	ENDIF
856	!
857	!-- Compute the diffusion coefficients
858	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
859	IF ( .NOT. humidity ) THEN
860	IF ( ocean ) THEN
861	CALL diffusivities( prho, prho_reference )
862	ELSE
863	CALL diffusivities( pt, pt_reference )
864	ENDIF
865	ELSE
866	CALL diffusivities( vpt, pt_reference )
867	ENDIF
868	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
869
870	ENDIF
871
872	!
873	!-- If required, calculate radiative fluxes and heating rates
874	IF ( radiation .AND. intermediate_timestep_count &
875	== intermediate_timestep_count_max .AND. simulated_time > &
876	skip_time_do_radiation ) THEN
877
878	time_radiation = time_radiation + dt_3d
879
880	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
881	THEN
882
883	CALL cpu_log( log_point(50), 'radiation', 'start' )
884
885	IF ( .NOT. force_radiation_call ) THEN
886	time_radiation = time_radiation - dt_radiation
887	ENDIF
888
889	IF ( radiation_scheme == 'clear-sky' ) THEN
890	CALL radiation_clearsky
891	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
892	CALL radiation_rrtmg
893	ELSE
894	CALL radiation_constant
895	ENDIF
896
897	CALL cpu_log( log_point(50), 'radiation', 'stop' )
898	ENDIF
899	ENDIF
900
901	ENDDO ! Intermediate step loop
902
903	!
904	!-- Increase simulation time and output times
905	nr_timesteps_this_run = nr_timesteps_this_run + 1
906	current_timestep_number = current_timestep_number + 1
907	simulated_time = simulated_time + dt_3d
908	simulated_time_chr = time_to_string( simulated_time )
909	time_since_reference_point = simulated_time - coupling_start_time
910
911	IF ( simulated_time >= skip_time_data_output_av ) THEN
912	time_do_av = time_do_av + dt_3d
913	ENDIF
914	IF ( simulated_time >= skip_time_do2d_xy ) THEN
915	time_do2d_xy = time_do2d_xy + dt_3d
916	ENDIF
917	IF ( simulated_time >= skip_time_do2d_xz ) THEN
918	time_do2d_xz = time_do2d_xz + dt_3d
919	ENDIF
920	IF ( simulated_time >= skip_time_do2d_yz ) THEN
921	time_do2d_yz = time_do2d_yz + dt_3d
922	ENDIF
923	IF ( simulated_time >= skip_time_do3d ) THEN
924	time_do3d = time_do3d + dt_3d
925	ENDIF
926	DO mid = 1, masks
927	IF ( simulated_time >= skip_time_domask(mid) ) THEN
928	time_domask(mid)= time_domask(mid) + dt_3d
929	ENDIF
930	ENDDO
931	time_dvrp = time_dvrp + dt_3d
932	IF ( simulated_time >= skip_time_dosp ) THEN
933	time_dosp = time_dosp + dt_3d
934	ENDIF
935	time_dots = time_dots + dt_3d
936	IF ( .NOT. first_call_lpm ) THEN
937	time_dopts = time_dopts + dt_3d
938	ENDIF
939	IF ( simulated_time >= skip_time_dopr ) THEN
940	time_dopr = time_dopr + dt_3d
941	ENDIF
942	time_dopr_listing = time_dopr_listing + dt_3d
943	time_run_control = time_run_control + dt_3d
944
945	!
946	!-- Data exchange between coupled models
947	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
948	time_coupling = time_coupling + dt_3d
949
950	!
951	!-- In case of model termination initiated by the local model
952	!-- (terminate_coupled > 0), the coupler must be skipped because it would
953	!-- cause an MPI intercomminucation hang.
954	!-- If necessary, the coupler will be called at the beginning of the
955	!-- next restart run.
956	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
957	CALL surface_coupler
958	time_coupling = time_coupling - dt_coupling
959	ENDDO
960	ENDIF
961
962	!
963	!-- Execute user-defined actions
964	CALL user_actions( 'after_integration' )
965
966	!
967	!-- If Galilei transformation is used, determine the distance that the
968	!-- model has moved so far
969	IF ( galilei_transformation ) THEN
970	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
971	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
972	ENDIF
973
974	!
975	!-- Check, if restart is necessary (because cpu-time is expiring or
976	!-- because it is forced by user) and set stop flag
977	!-- This call is skipped if the remote model has already initiated a restart.
978	IF ( .NOT. terminate_run ) CALL check_for_restart
979
980	!
981	!-- Carry out statistical analysis and output at the requested output times.
982	!-- The MOD function is used for calculating the output time counters (like
983	!-- time_dopr) in order to regard a possible decrease of the output time
984	!-- interval in case of restart runs
985
986	!
987	!-- Set a flag indicating that so far no statistics have been created
988	!-- for this time step
989	flow_statistics_called = .FALSE.
990
991	!
992	!-- If required, call flow_statistics for averaging in time
993	IF ( averaging_interval_pr /= 0.0_wp .AND. &
994	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
995	simulated_time >= skip_time_dopr ) THEN
996	time_dopr_av = time_dopr_av + dt_3d
997	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
998	do_sum = .TRUE.
999	time_dopr_av = MOD( time_dopr_av, &
1000	MAX( dt_averaging_input_pr, dt_3d ) )
1001	ENDIF
1002	ENDIF
1003	IF ( do_sum ) CALL flow_statistics
1004
1005	!
1006	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
1007	IF ( averaging_interval /= 0.0_wp .AND. &
1008	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
1009	simulated_time >= skip_time_data_output_av ) &
1010	THEN
1011	time_do_sla = time_do_sla + dt_3d
1012	IF ( time_do_sla >= dt_averaging_input ) THEN
1013	CALL sum_up_3d_data
1014	average_count_3d = average_count_3d + 1
1015	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
1016	ENDIF
1017	ENDIF
1018
1019	!
1020	!-- Calculate spectra for time averaging
1021	IF ( averaging_interval_sp /= 0.0_wp .AND. &
1022	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
1023	simulated_time >= skip_time_dosp ) THEN
1024	time_dosp_av = time_dosp_av + dt_3d
1025	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
1026	CALL calc_spectra
1027	time_dosp_av = MOD( time_dosp_av, &
1028	MAX( dt_averaging_input_pr, dt_3d ) )
1029	ENDIF
1030	ENDIF
1031
1032	!
1033	!-- Profile output (ASCII) on file
1034	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1035	CALL print_1d
1036	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1037	dt_3d ) )
1038	ENDIF
1039
1040	!
1041	!-- Graphic output for PROFIL
1042	IF ( time_dopr >= dt_dopr ) THEN
1043	IF ( dopr_n /= 0 ) CALL data_output_profiles
1044	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1045	time_dopr_av = 0.0_wp ! due to averaging (see above)
1046	ENDIF
1047
1048	!
1049	!-- Graphic output for time series
1050	IF ( time_dots >= dt_dots ) THEN
1051	CALL data_output_tseries
1052	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1053	ENDIF
1054
1055	!
1056	!-- Output of spectra (formatted for use with PROFIL), in case of no
1057	!-- time averaging, spectra has to be calculated before
1058	IF ( time_dosp >= dt_dosp ) THEN
1059	IF ( average_count_sp == 0 ) CALL calc_spectra
1060	CALL data_output_spectra
1061	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1062	ENDIF
1063
1064	!
1065	!-- 2d-data output (cross-sections)
1066	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1067	CALL data_output_2d( 'xy', 0 )
1068	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1069	ENDIF
1070	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1071	CALL data_output_2d( 'xz', 0 )
1072	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1073	ENDIF
1074	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1075	CALL data_output_2d( 'yz', 0 )
1076	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1077	ENDIF
1078
1079	!
1080	!-- 3d-data output (volume data)
1081	IF ( time_do3d >= dt_do3d ) THEN
1082	CALL data_output_3d( 0 )
1083	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1084	ENDIF
1085
1086	!
1087	!-- Masked data output
1088	DO mid = 1, masks
1089	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1090	CALL data_output_mask( 0 )
1091	time_domask(mid) = MOD( time_domask(mid), &
1092	MAX( dt_domask(mid), dt_3d ) )
1093	ENDIF
1094	ENDDO
1095
1096	!
1097	!-- Output of time-averaged 2d/3d/masked data
1098	IF ( time_do_av >= dt_data_output_av ) THEN
1099	CALL average_3d_data
1100	CALL data_output_2d( 'xy', 1 )
1101	CALL data_output_2d( 'xz', 1 )
1102	CALL data_output_2d( 'yz', 1 )
1103	CALL data_output_3d( 1 )
1104	DO mid = 1, masks
1105	CALL data_output_mask( 1 )
1106	ENDDO
1107	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1108	ENDIF
1109
1110	!
1111	!-- Output of particle time series
1112	IF ( particle_advection ) THEN
1113	IF ( time_dopts >= dt_dopts .OR. &
1114	( simulated_time >= particle_advection_start .AND. &
1115	first_call_lpm ) ) THEN
1116	CALL data_output_ptseries
1117	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1118	ENDIF
1119	ENDIF
1120
1121	!
1122	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1123	#if defined( __dvrp_graphics )
1124	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1125	#endif
1126	IF ( time_dvrp >= dt_dvrp ) THEN
1127	CALL data_output_dvrp
1128	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1129	ENDIF
1130	#if defined( __dvrp_graphics )
1131	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1132	#endif
1133
1134	!
1135	!-- If required, set the heat flux for the next time step at a random value
1136	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
1137
1138	!
1139	!-- Execute user-defined actions
1140	CALL user_actions( 'after_timestep' )
1141
1142	!
1143	!-- Determine size of next time step. Save timestep dt_3d because it is
1144	!-- newly calculated in routine timestep, but required further below for
1145	!-- steering the run control output interval
1146	dt_3d_old = dt_3d
1147	CALL timestep
1148
1149	!
1150	!-- Synchronize the timestep in case of nested run.
1151	IF ( nested_run ) THEN
1152	!
1153	!-- Synchronize by unifying the time step.
1154	!-- Global minimum of all time-steps is used for all.
1155	CALL pmci_synchronize
1156	ENDIF
1157
1158	!
1159	!-- Computation and output of run control parameters.
1160	!-- This is also done whenever perturbations have been imposed
1161	IF ( time_run_control >= dt_run_control .OR. &
1162	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
1163	THEN
1164	! IF ( current_timestep_number == 1 ) THEN
1165	! IF ( nxl < 7 .AND. nxr > 7 .AND. nys < 7 .AND. nyn > 7 ) THEN
1166	! u(10,7,7) = 0.55
1167	! ENDIF
1168	! PRINT*, 'calculating minmax'
1169	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, u, &
1170	! 'abs', 0.0_wp, u_max, u_max_ijk )
1171	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, v, &
1172	! 'abs', 0.0_wp, v_max, v_max_ijk )
1173	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, w, &
1174	! 'abs', 0.0_wp, w_max, w_max_ijk )
1175	! PRINT*, 'calculated u_max = ', u_max, ' myid = ', myid
1176	! ENDIF
1177	CALL run_control
1178	IF ( time_run_control >= dt_run_control ) THEN
1179	time_run_control = MOD( time_run_control, &
1180	MAX( dt_run_control, dt_3d_old ) )
1181	ENDIF
1182	ENDIF
1183
1184	!
1185	!-- Output elapsed simulated time in form of a progress bar on stdout
1186	IF ( myid == 0 ) CALL output_progress_bar
1187
1188	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1189
1190
1191	ENDDO ! time loop
1192
1193	IF ( myid == 0 ) CALL finish_progress_bar
1194
1195	#if defined( __dvrp_graphics )
1196	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1197	#endif
1198
1199	CALL location_message( 'finished time-stepping', .TRUE. )
1200
1201	END SUBROUTINE time_integration

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