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source: palm/trunk/SOURCE/time_integration.f90 @ 1925

Last change on this file since 1925 was 1925, checked in by hellstea, 8 years ago
Error check for overlapping parallel nests added
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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 1925 2016-06-07 11:34:42Z hellstea $
26	!
27	! 1918 2016-05-27 14:35:57Z raasch
28	! determination of time step moved to the end of the time step loop,
29	! the first time step is now always calculated before the time step loop (i.e.
30	! also in case of restart runs)
31	!
32	! 1914 2016-05-26 14:44:07Z witha
33	! Added call for wind turbine model
34	!
35	! 1878 2016-04-19 12:30:36Z hellstea
36	! Synchronization for nested runs rewritten
37	!
38	! 1853 2016-04-11 09:00:35Z maronga
39	! Adjusted for use with radiation_scheme = constant
40	!
41	! 1849 2016-04-08 11:33:18Z hoffmann
42	! Adapted for modularization of microphysics
43	!
44	! 1833 2016-04-07 14:23:03Z raasch
45	! spectrum renamed spectra_mod, spectra related variables moved to spectra_mod
46	!
47	! 1831 2016-04-07 13:15:51Z hoffmann
48	! turbulence renamed collision_turbulence
49	!
50	! 1822 2016-04-07 07:49:42Z hoffmann
51	! icloud_scheme replaced by microphysics_*
52	!
53	! 1808 2016-04-05 19:44:00Z raasch
54	! output message in case unscheduled radiation calls removed
55	!
56	! 1797 2016-03-21 16:50:28Z raasch
57	! introduction of different datatransfer modes
58	!
59	! 1791 2016-03-11 10:41:25Z raasch
60	! call of pmci_update_new removed
61	!
62	! 1786 2016-03-08 05:49:27Z raasch
63	! +module spectrum
64	!
65	! 1783 2016-03-06 18:36:17Z raasch
66	! switch back of netcdf data format for mask output moved to the mask output
67	! routine
68	!
69	! 1781 2016-03-03 15:12:23Z raasch
70	! some pmc calls removed at the beginning (before timeloop),
71	! pmc initialization moved to the main program
72	!
73	! 1764 2016-02-28 12:45:19Z raasch
74	! PMC_ACTIVE flags removed,
75	! bugfix: nest synchronization after first call of timestep
76	!
77	! 1762 2016-02-25 12:31:13Z hellstea
78	! Introduction of nested domain feature
79	!
80	! 1736 2015-12-04 08:56:33Z raasch
81	! no perturbations added to total domain if energy limit has been set zero
82	!
83	! 1691 2015-10-26 16:17:44Z maronga
84	! Added option for spin-ups without land surface and radiation models. Moved calls
85	! for radiation and lan surface schemes.
86	!
87	! 1682 2015-10-07 23:56:08Z knoop
88	! Code annotations made doxygen readable
89	!
90	! 1671 2015-09-25 03:29:37Z raasch
91	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
92	! for particles
93	!
94	! 1585 2015-04-30 07:05:52Z maronga
95	! Moved call of radiation scheme. Added support for RRTM
96	!
97	! 1551 2015-03-03 14:18:16Z maronga
98	! Added interface for different radiation schemes.
99	!
100	! 1496 2014-12-02 17:25:50Z maronga
101	! Added calls for the land surface model and radiation scheme
102	!
103	! 1402 2014-05-09 14:25:13Z raasch
104	! location messages modified
105	!
106	! 1384 2014-05-02 14:31:06Z raasch
107	! location messages added
108	!
109	! 1380 2014-04-28 12:40:45Z heinze
110	! CALL of nudge_ref added
111	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
112	!
113	! 1365 2014-04-22 15:03:56Z boeske
114	! Reset sums_ls_l to zero at each timestep
115	! +sums_ls_l
116	! Calculation of reference state (previously in subroutine calc_mean_profile)
117
118	! 1342 2014-03-26 17:04:47Z kanani
119	! REAL constants defined as wp-kind
120	!
121	! 1320 2014-03-20 08:40:49Z raasch
122	! ONLY-attribute added to USE-statements,
123	! kind-parameters added to all INTEGER and REAL declaration statements,
124	! kinds are defined in new module kinds,
125	! old module precision_kind is removed,
126	! revision history before 2012 removed,
127	! comment fields (!:) to be used for variable explanations added to
128	! all variable declaration statements
129	! 1318 2014-03-17 13:35:16Z raasch
130	! module interfaces removed
131	!
132	! 1308 2014-03-13 14:58:42Z fricke
133	! +netcdf_data_format_save
134	! For masked data, parallel netcdf output is not tested so far, hence
135	! netcdf_data_format is switched back to non-paralell output.
136	!
137	! 1276 2014-01-15 13:40:41Z heinze
138	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
139	!
140	! 1257 2013-11-08 15:18:40Z raasch
141	! acc-update-host directive for timestep removed
142	!
143	! 1241 2013-10-30 11:36:58Z heinze
144	! Generalize calc_mean_profile for wider use
145	! Determine shf and qsws in dependence on data from LSF_DATA
146	! Determine ug and vg in dependence on data from LSF_DATA
147	! 1221 2013-09-10 08:59:13Z raasch
148	! host update of arrays before timestep is called
149	!
150	! 1179 2013-06-14 05:57:58Z raasch
151	! mean profiles for reference state are only calculated if required,
152	! small bugfix for background communication
153	!
154	! 1171 2013-05-30 11:27:45Z raasch
155	! split of prognostic_equations deactivated (comment lines), for the time being
156	!
157	! 1128 2013-04-12 06:19:32Z raasch
158	! asynchronous transfer of ghost point data realized for acc-optimized version:
159	! prognostic_equations are first called two times for those points required for
160	! the left-right and north-south exchange, respectively, and then for the
161	! remaining points,
162	! those parts requiring global communication moved from prognostic_equations to
163	! here
164	!
165	! 1115 2013-03-26 18:16:16Z hoffmann
166	! calculation of qr and nr is restricted to precipitation
167	!
168	! 1113 2013-03-10 02:48:14Z raasch
169	! GPU-porting of boundary conditions,
170	! openACC directives updated
171	! formal parameter removed from routine boundary_conds
172	!
173	! 1111 2013-03-08 23:54:10Z raasch
174	! +internal timestep counter for cpu statistics added,
175	! openACC directives updated
176	!
177	! 1092 2013-02-02 11:24:22Z raasch
178	! unused variables removed
179	!
180	! 1065 2012-11-22 17:42:36Z hoffmann
181	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
182	!
183	! 1053 2012-11-13 17:11:03Z hoffmann
184	! exchange of ghost points for nr, qr added
185	!
186	! 1036 2012-10-22 13:43:42Z raasch
187	! code put under GPL (PALM 3.9)
188	!
189	! 1019 2012-09-28 06:46:45Z raasch
190	! non-optimized version of prognostic_equations removed
191	!
192	! 1015 2012-09-27 09:23:24Z raasch
193	! +call of prognostic_equations_acc
194	!
195	! 1001 2012-09-13 14:08:46Z raasch
196	! all actions concerning leapfrog- and upstream-spline-scheme removed
197	!
198	! 849 2012-03-15 10:35:09Z raasch
199	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
200	!
201	! 825 2012-02-19 03:03:44Z raasch
202	! wang_collision_kernel renamed wang_kernel
203	!
204	! Revision 1.1 1997/08/11 06:19:04 raasch
205	! Initial revision
206	!
207	!
208	! Description:
209	! ------------
210	!> Integration in time of the model equations, statistical analysis and graphic
211	!> output
212	!------------------------------------------------------------------------------!
213	SUBROUTINE time_integration
214
215
216	USE advec_ws, &
217	ONLY: ws_statistics
218
219	USE arrays_3d, &
220	ONLY: diss, dzu, e, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, &
221	ql, ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, &
222	u, u_p, v, vpt, v_p, w, w_p
223
224	USE calc_mean_profile_mod, &
225	ONLY: calc_mean_profile
226
227	USE control_parameters, &
228	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
229	averaging_interval, averaging_interval_pr, &
230	bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
231	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
232	cloud_physics, constant_flux_layer, constant_heatflux, &
233	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
234	coupling_start_time, current_timestep_number, &
235	disturbance_created, disturbance_energy_limit, dist_range, &
236	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
237	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
238	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
239	dt_dopr_listing, dt_dots, dt_dvrp, dt_run_control, &
240	end_time, first_call_lpm, galilei_transformation, humidity, &
241	intermediate_timestep_count, &
242	intermediate_timestep_count_max, large_scale_forcing, &
243	loop_optimization, lsf_surf, lsf_vert, masks, &
244	microphysics_seifert, mid, nest_domain, &
245	neutral, nr_timesteps_this_run, nudging, &
246	ocean, on_device, passive_scalar, &
247	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
248	run_coupled, simulated_time, simulated_time_chr, &
249	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
250	skip_time_do3d, skip_time_domask, skip_time_dopr, &
251	skip_time_data_output_av, sloping_surface, &
252	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
253	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
254	time_do3d, time_domask, time_dopr, time_dopr_av, &
255	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
256	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
257	time_run_control, time_since_reference_point, &
258	turbulent_inflow, use_initial_profile_as_reference, &
259	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
260	ws_scheme_sca
261
262	USE cpulog, &
263	ONLY: cpu_log, log_point, log_point_s
264
265	USE indices, &
266	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
267	nxrg, nyn, nyng, nys, nysg, nzb, nzt, nzb_u_inner, nzb_v_inner
268
269	USE interaction_droplets_ptq_mod, &
270	ONLY: interaction_droplets_ptq
271
272	USE interfaces
273
274	USE kinds
275
276	USE land_surface_model_mod, &
277	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
278	skip_time_do_lsm
279
280	USE ls_forcing_mod, &
281	ONLY: ls_forcing_surf, ls_forcing_vert
282
283	USE microphysics_mod, &
284	ONLY: collision_turbulence
285
286	USE nudge_mod, &
287	ONLY: calc_tnudge, nudge_ref
288
289	USE particle_attributes, &
290	ONLY: particle_advection, particle_advection_start, &
291	use_sgs_for_particles, wang_kernel
292
293	USE pegrid
294
295	USE pmc_interface, &
296	ONLY: client_to_server, nested_run, nesting_mode, &
297	pmci_datatrans, pmci_ensure_nest_mass_conservation, &
298	pmci_synchronize, server_to_client
299
300	USE production_e_mod, &
301	ONLY: production_e_init
302
303	USE progress_bar, &
304	ONLY: finish_progress_bar, output_progress_bar
305
306	USE prognostic_equations_mod, &
307	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
308	prognostic_equations_vector
309
310	USE radiation_model_mod, &
311	ONLY: dt_radiation, force_radiation_call, radiation, &
312	radiation_clearsky, radiation_constant, radiation_rrtmg, &
313	radiation_scheme, skip_time_do_radiation, time_radiation
314
315	USE spectra_mod, &
316	ONLY: average_count_sp, averaging_interval_sp, calc_spectra, dt_dosp, &
317	skip_time_dosp
318
319	USE statistics, &
320	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l, u_max, &
321	u_max_ijk, v_max, v_max_ijk, w_max, w_max_ijk
322
323	USE surface_layer_fluxes_mod, &
324	ONLY: surface_layer_fluxes
325
326	USE user_actions_mod, &
327	ONLY: user_actions
328
329	USE wind_turbine_model_mod, &
330	ONLY: wind_turbine, wtm_forces
331
332	IMPLICIT NONE
333
334	CHARACTER (LEN=9) :: time_to_string !<
335
336	REAL(wp) :: dt_3d_old !< temporary storage of timestep to be used for
337	!< steering of run control output interval
338
339	!
340	!-- At beginning determine the first time step
341	CALL timestep
342
343	!
344	!-- Synchronize the timestep in case of nested run.
345	IF ( nested_run ) THEN
346	!
347	!-- Synchronization by unifying the time step.
348	!-- Global minimum of all time-steps is used for all.
349	CALL pmci_synchronize
350	ENDIF
351
352	!
353	!-- Determine and print out the run control quantities before the first time
354	!-- step of this run. For the initial run, some statistics (e.g. divergence)
355	!-- need to be determined first.
356	IF ( simulated_time == 0.0_wp ) CALL flow_statistics
357	CALL run_control
358
359	!
360	!-- Data exchange between coupled models in case that a call has been omitted
361	!-- at the end of the previous run of a job chain.
362	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
363	!
364	!-- In case of model termination initiated by the local model the coupler
365	!-- must not be called because this would again cause an MPI hang.
366	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
367	CALL surface_coupler
368	time_coupling = time_coupling - dt_coupling
369	ENDDO
370	IF (time_coupling == 0.0_wp .AND. &
371	time_since_reference_point < dt_coupling ) &
372	THEN
373	time_coupling = time_since_reference_point
374	ENDIF
375	ENDIF
376
377	#if defined( __dvrp_graphics )
378	!
379	!-- Time measurement with dvrp software
380	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
381	#endif
382
383	CALL location_message( 'start with time-stepping', .TRUE. )
384	!
385	!-- Start of the time loop
386	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
387	.NOT. terminate_run )
388
389	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
390
391	!
392	!-- Determine ug, vg and w_subs in dependence on data from external file
393	!-- LSF_DATA
394	IF ( large_scale_forcing .AND. lsf_vert ) THEN
395	CALL ls_forcing_vert ( simulated_time )
396	sums_ls_l = 0.0_wp
397	ENDIF
398
399	!
400	!-- Set pt_init and q_init to the current profiles taken from
401	!-- NUDGING_DATA
402	IF ( nudging ) THEN
403	CALL nudge_ref ( simulated_time )
404	!
405	!-- Store temperature gradient at the top boundary for possible Neumann
406	!-- boundary condition
407	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
408	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
409	ENDIF
410
411	!
412	!-- Execute the user-defined actions
413	CALL user_actions( 'before_timestep' )
414
415	!
416	!-- Calculate forces by wind turbines
417	IF ( wind_turbine ) THEN
418
419	CALL cpu_log( log_point(55), 'wind_turbine', 'start' )
420
421	CALL wtm_forces
422
423	CALL cpu_log( log_point(55), 'wind_turbine', 'stop' )
424
425	ENDIF
426
427	!
428	!-- Start of intermediate step loop
429	intermediate_timestep_count = 0
430	DO WHILE ( intermediate_timestep_count < &
431	intermediate_timestep_count_max )
432
433	intermediate_timestep_count = intermediate_timestep_count + 1
434
435	!
436	!-- Set the steering factors for the prognostic equations which depend
437	!-- on the timestep scheme
438	CALL timestep_scheme_steering
439
440	!
441	!-- Calculate those variables needed in the tendency terms which need
442	!-- global communication
443	IF ( .NOT. use_single_reference_value .AND. &
444	.NOT. use_initial_profile_as_reference ) THEN
445	!
446	!-- Horizontally averaged profiles to be used as reference state in
447	!-- buoyancy terms (WARNING: only the respective last call of
448	!-- calc_mean_profile defines the reference state!)
449	IF ( .NOT. neutral ) THEN
450	CALL calc_mean_profile( pt, 4 )
451	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
452	ENDIF
453	IF ( ocean ) THEN
454	CALL calc_mean_profile( rho, 64 )
455	ref_state(:) = hom(:,1,64,0)
456	ENDIF
457	IF ( humidity ) THEN
458	CALL calc_mean_profile( vpt, 44 )
459	ref_state(:) = hom(:,1,44,0)
460	ENDIF
461
462	ENDIF
463
464	IF ( .NOT. constant_diffusion ) CALL production_e_init
465	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
466	intermediate_timestep_count == 1 ) CALL ws_statistics
467	!
468	!-- In case of nudging calculate current nudging time scale and horizontal
469	!-- means of u, v, pt and q
470	IF ( nudging ) THEN
471	CALL calc_tnudge( simulated_time )
472	CALL calc_mean_profile( u, 1 )
473	CALL calc_mean_profile( v, 2 )
474	CALL calc_mean_profile( pt, 4 )
475	CALL calc_mean_profile( q, 41 )
476	ENDIF
477
478	!
479	!-- Solve the prognostic equations. A fast cache optimized version with
480	!-- only one single loop is used in case of Piascek-Williams advection
481	!-- scheme. NEC vector machines use a different version, because
482	!-- in the other versions a good vectorization is prohibited due to
483	!-- inlining problems.
484	IF ( loop_optimization == 'cache' ) THEN
485	CALL prognostic_equations_cache
486	ELSEIF ( loop_optimization == 'vector' ) THEN
487	CALL prognostic_equations_vector
488	ELSEIF ( loop_optimization == 'acc' ) THEN
489	i_left = nxl; i_right = nxr
490	j_south = nys; j_north = nyn
491	CALL prognostic_equations_acc
492
493	! i_left = nxl; i_right = nxl+nbgp-1
494	! j_south = nys; j_north = nyn
495	! CALL prognostic_equations_acc
496	! i_left = nxr-nbgp+1; i_right = nxr
497	! j_south = nys; j_north = nyn
498	! CALL prognostic_equations_acc
499
500	!
501	!-- Exchange of ghost points (lateral boundary conditions)
502	IF ( background_communication ) THEN
503
504	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
505
506	send_receive = 'lr'
507	sendrecv_in_background = .TRUE.
508	req = 0
509	req_count = 0
510
511	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
512	on_device = .TRUE. ! to be removed after complete porting
513	ELSE ! of ghost point exchange
514	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
515	ENDIF
516
517	CALL exchange_horiz( u_p, nbgp )
518	CALL exchange_horiz( v_p, nbgp )
519	CALL exchange_horiz( w_p, nbgp )
520	CALL exchange_horiz( pt_p, nbgp )
521	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
522	IF ( ocean ) THEN
523	CALL exchange_horiz( sa_p, nbgp )
524	CALL exchange_horiz( rho, nbgp )
525	CALL exchange_horiz( prho, nbgp )
526	ENDIF
527	IF (humidity .OR. passive_scalar) THEN
528	CALL exchange_horiz( q_p, nbgp )
529	IF ( cloud_physics .AND. microphysics_seifert ) THEN
530	CALL exchange_horiz( qr_p, nbgp )
531	CALL exchange_horiz( nr_p, nbgp )
532	ENDIF
533	ENDIF
534	IF ( cloud_droplets ) THEN
535	CALL exchange_horiz( ql, nbgp )
536	CALL exchange_horiz( ql_c, nbgp )
537	CALL exchange_horiz( ql_v, nbgp )
538	CALL exchange_horiz( ql_vp, nbgp )
539	ENDIF
540	IF ( wang_kernel .OR. collision_turbulence .OR. &
541	use_sgs_for_particles ) THEN
542	CALL exchange_horiz( diss, nbgp )
543	ENDIF
544
545	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
546	on_device = .FALSE. ! to be removed after complete porting
547	ELSE ! of ghost point exchange
548	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
549	ENDIF
550
551	sendrecv_in_background = .FALSE.
552
553	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
554
555	ENDIF
556
557	! i_left = nxl+nbgp; i_right = nxr-nbgp
558	! j_south = nys; j_north = nys+nbgp-1
559	! CALL prognostic_equations_acc
560	! i_left = nxl+nbgp; i_right = nxr-nbgp
561	! j_south = nyn-nbgp+1; j_north = nyn
562	! CALL prognostic_equations_acc
563
564	IF ( background_communication ) THEN
565	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
566	#if defined( __parallel )
567	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
568	#endif
569	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
570
571	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
572
573	send_receive = 'ns'
574	sendrecv_in_background = .TRUE.
575	req = 0
576	req_count = 0
577
578	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
579	on_device = .TRUE. ! to be removed after complete porting
580	ELSE ! of ghost point exchange
581	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
582	ENDIF
583
584	CALL exchange_horiz( u_p, nbgp )
585	CALL exchange_horiz( v_p, nbgp )
586	CALL exchange_horiz( w_p, nbgp )
587	CALL exchange_horiz( pt_p, nbgp )
588	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
589	IF ( ocean ) THEN
590	CALL exchange_horiz( sa_p, nbgp )
591	CALL exchange_horiz( rho, nbgp )
592	CALL exchange_horiz( prho, nbgp )
593	ENDIF
594	IF (humidity .OR. passive_scalar) THEN
595	CALL exchange_horiz( q_p, nbgp )
596	IF ( cloud_physics .AND. microphysics_seifert ) THEN
597	CALL exchange_horiz( qr_p, nbgp )
598	CALL exchange_horiz( nr_p, nbgp )
599	ENDIF
600	ENDIF
601	IF ( cloud_droplets ) THEN
602	CALL exchange_horiz( ql, nbgp )
603	CALL exchange_horiz( ql_c, nbgp )
604	CALL exchange_horiz( ql_v, nbgp )
605	CALL exchange_horiz( ql_vp, nbgp )
606	ENDIF
607	IF ( wang_kernel .OR. collision_turbulence .OR. &
608	use_sgs_for_particles ) THEN
609	CALL exchange_horiz( diss, nbgp )
610	ENDIF
611
612	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
613	on_device = .FALSE. ! to be removed after complete porting
614	ELSE ! of ghost point exchange
615	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
616	ENDIF
617
618	sendrecv_in_background = .FALSE.
619
620	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
621
622	ENDIF
623
624	! i_left = nxl+nbgp; i_right = nxr-nbgp
625	! j_south = nys+nbgp; j_north = nyn-nbgp
626	! CALL prognostic_equations_acc
627
628	IF ( background_communication ) THEN
629	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
630	#if defined( __parallel )
631	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
632	#endif
633	send_receive = 'al'
634	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
635	ENDIF
636
637	ENDIF
638
639	!
640	!-- Particle transport/physics with the Lagrangian particle model
641	!-- (only once during intermediate steps, because it uses an Euler-step)
642	!-- ### particle model should be moved before prognostic_equations, in order
643	!-- to regard droplet interactions directly
644	IF ( particle_advection .AND. &
645	simulated_time >= particle_advection_start .AND. &
646	intermediate_timestep_count == 1 ) THEN
647	CALL lpm
648	first_call_lpm = .FALSE.
649	ENDIF
650
651	!
652	!-- Interaction of droplets with temperature and specific humidity.
653	!-- Droplet condensation and evaporation is calculated within
654	!-- advec_particles.
655	IF ( cloud_droplets .AND. &
656	intermediate_timestep_count == intermediate_timestep_count_max )&
657	THEN
658	CALL interaction_droplets_ptq
659	ENDIF
660
661	!
662	!-- Exchange of ghost points (lateral boundary conditions)
663	IF ( .NOT. background_communication ) THEN
664
665	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
666
667	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
668	on_device = .TRUE. ! to be removed after complete porting
669	ELSE ! of ghost point exchange
670	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
671	ENDIF
672
673	CALL exchange_horiz( u_p, nbgp )
674	CALL exchange_horiz( v_p, nbgp )
675	CALL exchange_horiz( w_p, nbgp )
676	CALL exchange_horiz( pt_p, nbgp )
677	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
678	IF ( ocean ) THEN
679	CALL exchange_horiz( sa_p, nbgp )
680	CALL exchange_horiz( rho, nbgp )
681	CALL exchange_horiz( prho, nbgp )
682	ENDIF
683	IF (humidity .OR. passive_scalar) THEN
684	CALL exchange_horiz( q_p, nbgp )
685	IF ( cloud_physics .AND. microphysics_seifert ) THEN
686	CALL exchange_horiz( qr_p, nbgp )
687	CALL exchange_horiz( nr_p, nbgp )
688	ENDIF
689	ENDIF
690	IF ( cloud_droplets ) THEN
691	CALL exchange_horiz( ql, nbgp )
692	CALL exchange_horiz( ql_c, nbgp )
693	CALL exchange_horiz( ql_v, nbgp )
694	CALL exchange_horiz( ql_vp, nbgp )
695	ENDIF
696	IF ( wang_kernel .OR. collision_turbulence .OR. &
697	use_sgs_for_particles ) THEN
698	CALL exchange_horiz( diss, nbgp )
699	ENDIF
700
701	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
702	on_device = .FALSE. ! to be removed after complete porting
703	ELSE ! of ghost point exchange
704	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
705	ENDIF
706
707	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
708
709	ENDIF
710
711	!
712	!-- Boundary conditions for the prognostic quantities (except of the
713	!-- velocities at the outflow in case of a non-cyclic lateral wall)
714	CALL boundary_conds
715
716	!
717	!-- Swap the time levels in preparation for the next time step.
718	CALL swap_timelevel
719
720	IF ( nested_run ) THEN
721
722	CALL cpu_log( log_point(60), 'nesting', 'start' )
723	!
724	!-- Domain nesting. The data transfer subroutines pmci_server_datatrans
725	!-- and pmci_client_datatatrans are called inside the wrapper
726	!-- subroutine pmci_datatrans according to the control parameters
727	!-- nesting_mode and nesting_datatransfer_mode.
728	!-- TO_DO: why is nesting_mode given as a parameter here?
729	CALL pmci_datatrans( nesting_mode )
730
731	IF ( nesting_mode == 'two-way' ) THEN
732	!
733	!-- Exchange_horiz is needed for all server-domains after the
734	!-- anterpolation
735	CALL exchange_horiz( u, nbgp )
736	CALL exchange_horiz( v, nbgp )
737	CALL exchange_horiz( w, nbgp )
738	IF ( .NOT. neutral ) THEN
739	CALL exchange_horiz( pt, nbgp )
740	ENDIF
741	IF ( humidity .OR. passive_scalar ) THEN
742	CALL exchange_horiz( q, nbgp )
743	ENDIF
744	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
745	ENDIF
746	!
747	!-- Correct the w top-BC in nest domains to ensure mass conservation.
748	!-- This action must never be done for the root domain.
749	IF ( nest_domain ) THEN
750	CALL pmci_ensure_nest_mass_conservation
751	ENDIF
752
753	CALL cpu_log( log_point(60), 'nesting', 'stop' )
754
755	ENDIF
756
757	!
758	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
759	!-- when a sloping surface is used
760	IF ( sloping_surface ) THEN
761	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
762	pt_slope_offset
763	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
764	pt_slope_offset
765	ENDIF
766
767	!
768	!-- Impose a turbulent inflow using the recycling method
769	IF ( turbulent_inflow ) CALL inflow_turbulence
770
771	!
772	!-- Impose a random perturbation on the horizontal velocity field
773	IF ( create_disturbances .AND. &
774	( call_psolver_at_all_substeps .AND. &
775	intermediate_timestep_count == intermediate_timestep_count_max )&
776	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
777	intermediate_timestep_count == 1 ) ) &
778	THEN
779	time_disturb = time_disturb + dt_3d
780	IF ( time_disturb >= dt_disturb ) THEN
781	!$acc update host( u, v )
782	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
783	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
784	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
785	CALL disturb_field( nzb_u_inner, tend, u )
786	CALL disturb_field( nzb_v_inner, tend, v )
787	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
788	!
789	!-- Runs with a non-cyclic lateral wall need perturbations
790	!-- near the inflow throughout the whole simulation
791	dist_range = 1
792	CALL disturb_field( nzb_u_inner, tend, u )
793	CALL disturb_field( nzb_v_inner, tend, v )
794	dist_range = 0
795	ENDIF
796	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
797	!$acc update device( u, v )
798	time_disturb = time_disturb - dt_disturb
799	ENDIF
800	ENDIF
801
802	!
803	!-- Reduce the velocity divergence via the equation for perturbation
804	!-- pressure.
805	IF ( intermediate_timestep_count == 1 .OR. &
806	call_psolver_at_all_substeps ) THEN
807	CALL pres
808	ENDIF
809
810	!
811	!-- If required, compute liquid water content
812	IF ( cloud_physics ) THEN
813	CALL calc_liquid_water_content
814	!$acc update device( ql )
815	ENDIF
816	!
817	!-- If required, compute virtual potential temperature
818	IF ( humidity ) THEN
819	CALL compute_vpt
820	!$acc update device( vpt )
821	ENDIF
822
823	!
824	!-- Compute the diffusion quantities
825	IF ( .NOT. constant_diffusion ) THEN
826
827	!
828	!-- Determine surface fluxes shf and qsws and surface values
829	!-- pt_surface and q_surface in dependence on data from external
830	!-- file LSF_DATA respectively
831	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
832	intermediate_timestep_count == intermediate_timestep_count_max )&
833	THEN
834	CALL ls_forcing_surf ( simulated_time )
835	ENDIF
836
837	!
838	!-- First the vertical fluxes in the surface (constant flux) layer are computed
839	IF ( constant_flux_layer ) THEN
840	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
841	CALL surface_layer_fluxes
842	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
843	ENDIF
844
845	!
846	!-- If required, solve the energy balance for the surface and run soil
847	!-- model
848	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
849
850	CALL cpu_log( log_point(54), 'land_surface', 'start' )
851	CALL lsm_energy_balance
852	CALL lsm_soil_model
853	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
854	ENDIF
855	!
856	!-- Compute the diffusion coefficients
857	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
858	IF ( .NOT. humidity ) THEN
859	IF ( ocean ) THEN
860	CALL diffusivities( prho, prho_reference )
861	ELSE
862	CALL diffusivities( pt, pt_reference )
863	ENDIF
864	ELSE
865	CALL diffusivities( vpt, pt_reference )
866	ENDIF
867	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
868
869	ENDIF
870
871	!
872	!-- If required, calculate radiative fluxes and heating rates
873	IF ( radiation .AND. intermediate_timestep_count &
874	== intermediate_timestep_count_max .AND. simulated_time > &
875	skip_time_do_radiation ) THEN
876
877	time_radiation = time_radiation + dt_3d
878
879	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
880	THEN
881
882	CALL cpu_log( log_point(50), 'radiation', 'start' )
883
884	IF ( .NOT. force_radiation_call ) THEN
885	time_radiation = time_radiation - dt_radiation
886	ENDIF
887
888	IF ( radiation_scheme == 'clear-sky' ) THEN
889	CALL radiation_clearsky
890	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
891	CALL radiation_rrtmg
892	ELSE
893	CALL radiation_constant
894	ENDIF
895
896	CALL cpu_log( log_point(50), 'radiation', 'stop' )
897	ENDIF
898	ENDIF
899
900	ENDDO ! Intermediate step loop
901
902	!
903	!-- Increase simulation time and output times
904	nr_timesteps_this_run = nr_timesteps_this_run + 1
905	current_timestep_number = current_timestep_number + 1
906	simulated_time = simulated_time + dt_3d
907	simulated_time_chr = time_to_string( simulated_time )
908	time_since_reference_point = simulated_time - coupling_start_time
909
910	IF ( simulated_time >= skip_time_data_output_av ) THEN
911	time_do_av = time_do_av + dt_3d
912	ENDIF
913	IF ( simulated_time >= skip_time_do2d_xy ) THEN
914	time_do2d_xy = time_do2d_xy + dt_3d
915	ENDIF
916	IF ( simulated_time >= skip_time_do2d_xz ) THEN
917	time_do2d_xz = time_do2d_xz + dt_3d
918	ENDIF
919	IF ( simulated_time >= skip_time_do2d_yz ) THEN
920	time_do2d_yz = time_do2d_yz + dt_3d
921	ENDIF
922	IF ( simulated_time >= skip_time_do3d ) THEN
923	time_do3d = time_do3d + dt_3d
924	ENDIF
925	DO mid = 1, masks
926	IF ( simulated_time >= skip_time_domask(mid) ) THEN
927	time_domask(mid)= time_domask(mid) + dt_3d
928	ENDIF
929	ENDDO
930	time_dvrp = time_dvrp + dt_3d
931	IF ( simulated_time >= skip_time_dosp ) THEN
932	time_dosp = time_dosp + dt_3d
933	ENDIF
934	time_dots = time_dots + dt_3d
935	IF ( .NOT. first_call_lpm ) THEN
936	time_dopts = time_dopts + dt_3d
937	ENDIF
938	IF ( simulated_time >= skip_time_dopr ) THEN
939	time_dopr = time_dopr + dt_3d
940	ENDIF
941	time_dopr_listing = time_dopr_listing + dt_3d
942	time_run_control = time_run_control + dt_3d
943
944	!
945	!-- Data exchange between coupled models
946	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
947	time_coupling = time_coupling + dt_3d
948
949	!
950	!-- In case of model termination initiated by the local model
951	!-- (terminate_coupled > 0), the coupler must be skipped because it would
952	!-- cause an MPI intercomminucation hang.
953	!-- If necessary, the coupler will be called at the beginning of the
954	!-- next restart run.
955	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
956	CALL surface_coupler
957	time_coupling = time_coupling - dt_coupling
958	ENDDO
959	ENDIF
960
961	!
962	!-- Execute user-defined actions
963	CALL user_actions( 'after_integration' )
964
965	!
966	!-- If Galilei transformation is used, determine the distance that the
967	!-- model has moved so far
968	IF ( galilei_transformation ) THEN
969	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
970	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
971	ENDIF
972
973	!
974	!-- Check, if restart is necessary (because cpu-time is expiring or
975	!-- because it is forced by user) and set stop flag
976	!-- This call is skipped if the remote model has already initiated a restart.
977	IF ( .NOT. terminate_run ) CALL check_for_restart
978
979	!
980	!-- Carry out statistical analysis and output at the requested output times.
981	!-- The MOD function is used for calculating the output time counters (like
982	!-- time_dopr) in order to regard a possible decrease of the output time
983	!-- interval in case of restart runs
984
985	!
986	!-- Set a flag indicating that so far no statistics have been created
987	!-- for this time step
988	flow_statistics_called = .FALSE.
989
990	!
991	!-- If required, call flow_statistics for averaging in time
992	IF ( averaging_interval_pr /= 0.0_wp .AND. &
993	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
994	simulated_time >= skip_time_dopr ) THEN
995	time_dopr_av = time_dopr_av + dt_3d
996	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
997	do_sum = .TRUE.
998	time_dopr_av = MOD( time_dopr_av, &
999	MAX( dt_averaging_input_pr, dt_3d ) )
1000	ENDIF
1001	ENDIF
1002	IF ( do_sum ) CALL flow_statistics
1003
1004	!
1005	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
1006	IF ( averaging_interval /= 0.0_wp .AND. &
1007	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
1008	simulated_time >= skip_time_data_output_av ) &
1009	THEN
1010	time_do_sla = time_do_sla + dt_3d
1011	IF ( time_do_sla >= dt_averaging_input ) THEN
1012	CALL sum_up_3d_data
1013	average_count_3d = average_count_3d + 1
1014	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
1015	ENDIF
1016	ENDIF
1017
1018	!
1019	!-- Calculate spectra for time averaging
1020	IF ( averaging_interval_sp /= 0.0_wp .AND. &
1021	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
1022	simulated_time >= skip_time_dosp ) THEN
1023	time_dosp_av = time_dosp_av + dt_3d
1024	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
1025	CALL calc_spectra
1026	time_dosp_av = MOD( time_dosp_av, &
1027	MAX( dt_averaging_input_pr, dt_3d ) )
1028	ENDIF
1029	ENDIF
1030
1031	!
1032	!-- Profile output (ASCII) on file
1033	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1034	CALL print_1d
1035	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1036	dt_3d ) )
1037	ENDIF
1038
1039	!
1040	!-- Graphic output for PROFIL
1041	IF ( time_dopr >= dt_dopr ) THEN
1042	IF ( dopr_n /= 0 ) CALL data_output_profiles
1043	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1044	time_dopr_av = 0.0_wp ! due to averaging (see above)
1045	ENDIF
1046
1047	!
1048	!-- Graphic output for time series
1049	IF ( time_dots >= dt_dots ) THEN
1050	CALL data_output_tseries
1051	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1052	ENDIF
1053
1054	!
1055	!-- Output of spectra (formatted for use with PROFIL), in case of no
1056	!-- time averaging, spectra has to be calculated before
1057	IF ( time_dosp >= dt_dosp ) THEN
1058	IF ( average_count_sp == 0 ) CALL calc_spectra
1059	CALL data_output_spectra
1060	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1061	ENDIF
1062
1063	!
1064	!-- 2d-data output (cross-sections)
1065	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1066	CALL data_output_2d( 'xy', 0 )
1067	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1068	ENDIF
1069	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1070	CALL data_output_2d( 'xz', 0 )
1071	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1072	ENDIF
1073	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1074	CALL data_output_2d( 'yz', 0 )
1075	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1076	ENDIF
1077
1078	!
1079	!-- 3d-data output (volume data)
1080	IF ( time_do3d >= dt_do3d ) THEN
1081	CALL data_output_3d( 0 )
1082	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1083	ENDIF
1084
1085	!
1086	!-- Masked data output
1087	DO mid = 1, masks
1088	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1089	CALL data_output_mask( 0 )
1090	time_domask(mid) = MOD( time_domask(mid), &
1091	MAX( dt_domask(mid), dt_3d ) )
1092	ENDIF
1093	ENDDO
1094
1095	!
1096	!-- Output of time-averaged 2d/3d/masked data
1097	IF ( time_do_av >= dt_data_output_av ) THEN
1098	CALL average_3d_data
1099	CALL data_output_2d( 'xy', 1 )
1100	CALL data_output_2d( 'xz', 1 )
1101	CALL data_output_2d( 'yz', 1 )
1102	CALL data_output_3d( 1 )
1103	DO mid = 1, masks
1104	CALL data_output_mask( 1 )
1105	ENDDO
1106	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1107	ENDIF
1108
1109	!
1110	!-- Output of particle time series
1111	IF ( particle_advection ) THEN
1112	IF ( time_dopts >= dt_dopts .OR. &
1113	( simulated_time >= particle_advection_start .AND. &
1114	first_call_lpm ) ) THEN
1115	CALL data_output_ptseries
1116	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1117	ENDIF
1118	ENDIF
1119
1120	!
1121	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1122	#if defined( __dvrp_graphics )
1123	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1124	#endif
1125	IF ( time_dvrp >= dt_dvrp ) THEN
1126	CALL data_output_dvrp
1127	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1128	ENDIF
1129	#if defined( __dvrp_graphics )
1130	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1131	#endif
1132
1133	!
1134	!-- If required, set the heat flux for the next time step at a random value
1135	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
1136
1137	!
1138	!-- Execute user-defined actions
1139	CALL user_actions( 'after_timestep' )
1140
1141	!
1142	!-- Determine size of next time step. Save timestep dt_3d because it is
1143	!-- newly calculated in routine timestep, but required further below for
1144	!-- steering the run control output interval
1145	dt_3d_old = dt_3d
1146	CALL timestep
1147
1148	!
1149	!-- Synchronize the timestep in case of nested run.
1150	IF ( nested_run ) THEN
1151	!
1152	!-- Synchronize by unifying the time step.
1153	!-- Global minimum of all time-steps is used for all.
1154	CALL pmci_synchronize
1155	ENDIF
1156
1157	!
1158	!-- Computation and output of run control parameters.
1159	!-- This is also done whenever perturbations have been imposed
1160	IF ( time_run_control >= dt_run_control .OR. &
1161	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
1162	THEN
1163	! IF ( current_timestep_number == 1 ) THEN
1164	! IF ( nxl < 7 .AND. nxr > 7 .AND. nys < 7 .AND. nyn > 7 ) THEN
1165	! u(10,7,7) = 0.55
1166	! ENDIF
1167	! PRINT*, 'calculating minmax'
1168	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, u, &
1169	! 'abs', 0.0_wp, u_max, u_max_ijk )
1170	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, v, &
1171	! 'abs', 0.0_wp, v_max, v_max_ijk )
1172	! CALL global_min_max( nzb, nzt+1, nysg, nyng, nxlg, nxrg, w, &
1173	! 'abs', 0.0_wp, w_max, w_max_ijk )
1174	! PRINT*, 'calculated u_max = ', u_max, ' myid = ', myid
1175	! ENDIF
1176	CALL run_control
1177	IF ( time_run_control >= dt_run_control ) THEN
1178	time_run_control = MOD( time_run_control, &
1179	MAX( dt_run_control, dt_3d_old ) )
1180	ENDIF
1181	ENDIF
1182
1183	!
1184	!-- Output elapsed simulated time in form of a progress bar on stdout
1185	IF ( myid == 0 ) CALL output_progress_bar
1186
1187	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1188
1189
1190	ENDDO ! time loop
1191
1192	IF ( myid == 0 ) CALL finish_progress_bar
1193
1194	#if defined( __dvrp_graphics )
1195	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1196	#endif
1197
1198	CALL location_message( 'finished time-stepping', .TRUE. )
1199
1200	END SUBROUTINE time_integration

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