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source: palm/trunk/SOURCE/time_integration.f90 @ 2011

Last change on this file since 2011 was 2011, checked in by kanani, 8 years ago
changes related to steering and formating of urban surface model
Property svn:keywords set to `Id`
File size: 47.1 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
6	! terms of the GNU General Public License as published by the Free Software
7	! Foundation, either version 3 of the License, or (at your option) any later
8	! version.
9	!
10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
13	!
14	! You should have received a copy of the GNU General Public License along with
15	! PALM. If not, see <http://www.gnu.org/licenses/>.
16	!
17	! Copyright 1997-2016 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	! Flag urban_surface is now defined in module control_parameters,
23	! removed commented CALLs of global_min_max.
24	!
25	! Former revisions:
26	! -----------------
27	! $Id: time_integration.f90 2011 2016-09-19 17:29:57Z kanani $
28	!
29	! 2007 2016-08-24 15:47:17Z kanani
30	! Added CALLs for new urban surface model
31	!
32	! 2000 2016-08-20 18:09:15Z knoop
33	! Forced header and separation lines into 80 columns
34	!
35	! 1976 2016-07-27 13:28:04Z maronga
36	! Simplified calls to radiation model
37	!
38	! 1960 2016-07-12 16:34:24Z suehring
39	! Separate humidity and passive scalar
40	!
41	! 1957 2016-07-07 10:43:48Z suehring
42	! flight module added
43	!
44	! 1919 2016-05-27 14:51:23Z raasch
45	! Initial version of purely vertical nesting introduced.
46	!
47	! 1918 2016-05-27 14:35:57Z raasch
48	! determination of time step moved to the end of the time step loop,
49	! the first time step is now always calculated before the time step loop (i.e.
50	! also in case of restart runs)
51	!
52	! 1914 2016-05-26 14:44:07Z witha
53	! Added call for wind turbine model
54	!
55	! 1878 2016-04-19 12:30:36Z hellstea
56	! Synchronization for nested runs rewritten
57	!
58	! 1853 2016-04-11 09:00:35Z maronga
59	! Adjusted for use with radiation_scheme = constant
60	!
61	! 1849 2016-04-08 11:33:18Z hoffmann
62	! Adapted for modularization of microphysics
63	!
64	! 1833 2016-04-07 14:23:03Z raasch
65	! spectrum renamed spectra_mod, spectra related variables moved to spectra_mod
66	!
67	! 1831 2016-04-07 13:15:51Z hoffmann
68	! turbulence renamed collision_turbulence
69	!
70	! 1822 2016-04-07 07:49:42Z hoffmann
71	! icloud_scheme replaced by microphysics_*
72	!
73	! 1808 2016-04-05 19:44:00Z raasch
74	! output message in case unscheduled radiation calls removed
75	!
76	! 1797 2016-03-21 16:50:28Z raasch
77	! introduction of different datatransfer modes
78	!
79	! 1791 2016-03-11 10:41:25Z raasch
80	! call of pmci_update_new removed
81	!
82	! 1786 2016-03-08 05:49:27Z raasch
83	! +module spectrum
84	!
85	! 1783 2016-03-06 18:36:17Z raasch
86	! switch back of netcdf data format for mask output moved to the mask output
87	! routine
88	!
89	! 1781 2016-03-03 15:12:23Z raasch
90	! some pmc calls removed at the beginning (before timeloop),
91	! pmc initialization moved to the main program
92	!
93	! 1764 2016-02-28 12:45:19Z raasch
94	! PMC_ACTIVE flags removed,
95	! bugfix: nest synchronization after first call of timestep
96	!
97	! 1762 2016-02-25 12:31:13Z hellstea
98	! Introduction of nested domain feature
99	!
100	! 1736 2015-12-04 08:56:33Z raasch
101	! no perturbations added to total domain if energy limit has been set zero
102	!
103	! 1691 2015-10-26 16:17:44Z maronga
104	! Added option for spin-ups without land surface and radiation models. Moved calls
105	! for radiation and lan surface schemes.
106	!
107	! 1682 2015-10-07 23:56:08Z knoop
108	! Code annotations made doxygen readable
109	!
110	! 1671 2015-09-25 03:29:37Z raasch
111	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
112	! for particles
113	!
114	! 1585 2015-04-30 07:05:52Z maronga
115	! Moved call of radiation scheme. Added support for RRTM
116	!
117	! 1551 2015-03-03 14:18:16Z maronga
118	! Added interface for different radiation schemes.
119	!
120	! 1496 2014-12-02 17:25:50Z maronga
121	! Added calls for the land surface model and radiation scheme
122	!
123	! 1402 2014-05-09 14:25:13Z raasch
124	! location messages modified
125	!
126	! 1384 2014-05-02 14:31:06Z raasch
127	! location messages added
128	!
129	! 1380 2014-04-28 12:40:45Z heinze
130	! CALL of nudge_ref added
131	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
132	!
133	! 1365 2014-04-22 15:03:56Z boeske
134	! Reset sums_ls_l to zero at each timestep
135	! +sums_ls_l
136	! Calculation of reference state (previously in subroutine calc_mean_profile)
137
138	! 1342 2014-03-26 17:04:47Z kanani
139	! REAL constants defined as wp-kind
140	!
141	! 1320 2014-03-20 08:40:49Z raasch
142	! ONLY-attribute added to USE-statements,
143	! kind-parameters added to all INTEGER and REAL declaration statements,
144	! kinds are defined in new module kinds,
145	! old module precision_kind is removed,
146	! revision history before 2012 removed,
147	! comment fields (!:) to be used for variable explanations added to
148	! all variable declaration statements
149	! 1318 2014-03-17 13:35:16Z raasch
150	! module interfaces removed
151	!
152	! 1308 2014-03-13 14:58:42Z fricke
153	! +netcdf_data_format_save
154	! For masked data, parallel netcdf output is not tested so far, hence
155	! netcdf_data_format is switched back to non-paralell output.
156	!
157	! 1276 2014-01-15 13:40:41Z heinze
158	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
159	!
160	! 1257 2013-11-08 15:18:40Z raasch
161	! acc-update-host directive for timestep removed
162	!
163	! 1241 2013-10-30 11:36:58Z heinze
164	! Generalize calc_mean_profile for wider use
165	! Determine shf and qsws in dependence on data from LSF_DATA
166	! Determine ug and vg in dependence on data from LSF_DATA
167	! 1221 2013-09-10 08:59:13Z raasch
168	! host update of arrays before timestep is called
169	!
170	! 1179 2013-06-14 05:57:58Z raasch
171	! mean profiles for reference state are only calculated if required,
172	! small bugfix for background communication
173	!
174	! 1171 2013-05-30 11:27:45Z raasch
175	! split of prognostic_equations deactivated (comment lines), for the time being
176	!
177	! 1128 2013-04-12 06:19:32Z raasch
178	! asynchronous transfer of ghost point data realized for acc-optimized version:
179	! prognostic_equations are first called two times for those points required for
180	! the left-right and north-south exchange, respectively, and then for the
181	! remaining points,
182	! those parts requiring global communication moved from prognostic_equations to
183	! here
184	!
185	! 1115 2013-03-26 18:16:16Z hoffmann
186	! calculation of qr and nr is restricted to precipitation
187	!
188	! 1113 2013-03-10 02:48:14Z raasch
189	! GPU-porting of boundary conditions,
190	! openACC directives updated
191	! formal parameter removed from routine boundary_conds
192	!
193	! 1111 2013-03-08 23:54:10Z raasch
194	! +internal timestep counter for cpu statistics added,
195	! openACC directives updated
196	!
197	! 1092 2013-02-02 11:24:22Z raasch
198	! unused variables removed
199	!
200	! 1065 2012-11-22 17:42:36Z hoffmann
201	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
202	!
203	! 1053 2012-11-13 17:11:03Z hoffmann
204	! exchange of ghost points for nr, qr added
205	!
206	! 1036 2012-10-22 13:43:42Z raasch
207	! code put under GPL (PALM 3.9)
208	!
209	! 1019 2012-09-28 06:46:45Z raasch
210	! non-optimized version of prognostic_equations removed
211	!
212	! 1015 2012-09-27 09:23:24Z raasch
213	! +call of prognostic_equations_acc
214	!
215	! 1001 2012-09-13 14:08:46Z raasch
216	! all actions concerning leapfrog- and upstream-spline-scheme removed
217	!
218	! 849 2012-03-15 10:35:09Z raasch
219	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
220	!
221	! 825 2012-02-19 03:03:44Z raasch
222	! wang_collision_kernel renamed wang_kernel
223	!
224	! Revision 1.1 1997/08/11 06:19:04 raasch
225	! Initial revision
226	!
227	!
228	! Description:
229	! ------------
230	!> Integration in time of the model equations, statistical analysis and graphic
231	!> output
232	!------------------------------------------------------------------------------!
233	SUBROUTINE time_integration
234
235
236	USE advec_ws, &
237	ONLY: ws_statistics
238
239	USE arrays_3d, &
240	ONLY: diss, dzu, e, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, &
241	ql, ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, s, s_p, sa_p, &
242	tend, u, u_p, v, vpt, v_p, w, w_p
243
244	USE calc_mean_profile_mod, &
245	ONLY: calc_mean_profile
246
247	USE control_parameters, &
248	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
249	averaging_interval, averaging_interval_pr, &
250	bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
251	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
252	cloud_physics, constant_flux_layer, constant_heatflux, &
253	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
254	coupling_start_time, current_timestep_number, &
255	disturbance_created, disturbance_energy_limit, dist_range, &
256	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
257	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
258	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
259	dt_dopr_listing, dt_dots, dt_dvrp, dt_run_control, &
260	end_time, first_call_lpm, galilei_transformation, humidity, &
261	intermediate_timestep_count, &
262	intermediate_timestep_count_max, large_scale_forcing, &
263	loop_optimization, lsf_surf, lsf_vert, masks, &
264	microphysics_seifert, mid, nest_domain, &
265	neutral, nr_timesteps_this_run, nudging, &
266	ocean, on_device, passive_scalar, &
267	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
268	run_coupled, simulated_time, simulated_time_chr, &
269	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
270	skip_time_do3d, skip_time_domask, skip_time_dopr, &
271	skip_time_data_output_av, sloping_surface, &
272	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
273	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
274	time_do3d, time_domask, time_dopr, time_dopr_av, &
275	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
276	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
277	time_run_control, time_since_reference_point, &
278	turbulent_inflow, urban_surface, &
279	use_initial_profile_as_reference, &
280	use_single_reference_value, u_gtrans, v_gtrans, virtual_flight, &
281	ws_scheme_mom, ws_scheme_sca
282
283	USE cpulog, &
284	ONLY: cpu_log, log_point, log_point_s
285
286	USE flight_mod, &
287	ONLY: flight_measurement
288
289
290	USE indices, &
291	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
292	nxrg, nyn, nyng, nys, nysg, nzb, nzt, nzb_u_inner, nzb_v_inner
293
294	USE interaction_droplets_ptq_mod, &
295	ONLY: interaction_droplets_ptq
296
297	USE interfaces
298
299	USE kinds
300
301	USE land_surface_model_mod, &
302	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
303	skip_time_do_lsm
304
305	USE ls_forcing_mod, &
306	ONLY: ls_forcing_surf, ls_forcing_vert
307
308	USE microphysics_mod, &
309	ONLY: collision_turbulence
310
311	USE nudge_mod, &
312	ONLY: calc_tnudge, nudge_ref
313
314	USE particle_attributes, &
315	ONLY: particle_advection, particle_advection_start, &
316	use_sgs_for_particles, wang_kernel
317
318	USE pegrid
319
320	USE pmc_interface, &
321	ONLY: nested_run, nesting_mode, pmci_datatrans, &
322	pmci_ensure_nest_mass_conservation, pmci_synchronize
323
324	USE production_e_mod, &
325	ONLY: production_e_init
326
327	USE progress_bar, &
328	ONLY: finish_progress_bar, output_progress_bar
329
330	USE prognostic_equations_mod, &
331	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
332	prognostic_equations_vector
333
334	USE radiation_model_mod, &
335	ONLY: dt_radiation, force_radiation_call, radiation, radiation_control,&
336	skip_time_do_radiation, time_radiation
337
338	USE spectra_mod, &
339	ONLY: average_count_sp, averaging_interval_sp, calc_spectra, dt_dosp, &
340	skip_time_dosp
341
342	USE statistics, &
343	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l, u_max, &
344	u_max_ijk, v_max, v_max_ijk, w_max, w_max_ijk
345
346	USE surface_layer_fluxes_mod, &
347	ONLY: surface_layer_fluxes
348
349	USE urban_surface_mod, &
350	ONLY: usm_material_heat_model, usm_material_model, &
351	usm_radiation, usm_surface_energy_balance
352
353	USE user_actions_mod, &
354	ONLY: user_actions
355
356	USE wind_turbine_model_mod, &
357	ONLY: wind_turbine, wtm_forces
358
359	IMPLICIT NONE
360
361	CHARACTER (LEN=9) :: time_to_string !<
362
363	REAL(wp) :: dt_3d_old !< temporary storage of timestep to be used for
364	!< steering of run control output interval
365
366	!
367	!-- At beginning determine the first time step
368	CALL timestep
369
370	!
371	!-- Synchronize the timestep in case of nested run.
372	IF ( nested_run ) THEN
373	!
374	!-- Synchronization by unifying the time step.
375	!-- Global minimum of all time-steps is used for all.
376	CALL pmci_synchronize
377	ENDIF
378
379	!
380	!-- Determine and print out the run control quantities before the first time
381	!-- step of this run. For the initial run, some statistics (e.g. divergence)
382	!-- need to be determined first.
383	IF ( simulated_time == 0.0_wp ) CALL flow_statistics
384	CALL run_control
385
386	!
387	!-- Data exchange between coupled models in case that a call has been omitted
388	!-- at the end of the previous run of a job chain.
389	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
390	!
391	!-- In case of model termination initiated by the local model the coupler
392	!-- must not be called because this would again cause an MPI hang.
393	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
394	CALL surface_coupler
395	time_coupling = time_coupling - dt_coupling
396	ENDDO
397	IF (time_coupling == 0.0_wp .AND. &
398	time_since_reference_point < dt_coupling ) &
399	THEN
400	time_coupling = time_since_reference_point
401	ENDIF
402	ENDIF
403
404	#if defined( __dvrp_graphics )
405	!
406	!-- Time measurement with dvrp software
407	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
408	#endif
409
410	CALL location_message( 'start with time-stepping', .TRUE. )
411	!
412	!-- Start of the time loop
413	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
414	.NOT. terminate_run )
415
416	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
417
418	!
419	!-- Determine ug, vg and w_subs in dependence on data from external file
420	!-- LSF_DATA
421	IF ( large_scale_forcing .AND. lsf_vert ) THEN
422	CALL ls_forcing_vert ( simulated_time )
423	sums_ls_l = 0.0_wp
424	ENDIF
425
426	!
427	!-- Set pt_init and q_init to the current profiles taken from
428	!-- NUDGING_DATA
429	IF ( nudging ) THEN
430	CALL nudge_ref ( simulated_time )
431	!
432	!-- Store temperature gradient at the top boundary for possible Neumann
433	!-- boundary condition
434	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
435	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
436	ENDIF
437
438	!
439	!-- Execute the user-defined actions
440	CALL user_actions( 'before_timestep' )
441
442	!
443	!-- Calculate forces by wind turbines
444	IF ( wind_turbine ) THEN
445
446	CALL cpu_log( log_point(55), 'wind_turbine', 'start' )
447
448	CALL wtm_forces
449
450	CALL cpu_log( log_point(55), 'wind_turbine', 'stop' )
451
452	ENDIF
453
454	!
455	!-- Start of intermediate step loop
456	intermediate_timestep_count = 0
457	DO WHILE ( intermediate_timestep_count < &
458	intermediate_timestep_count_max )
459
460	intermediate_timestep_count = intermediate_timestep_count + 1
461
462	!
463	!-- Set the steering factors for the prognostic equations which depend
464	!-- on the timestep scheme
465	CALL timestep_scheme_steering
466
467	!
468	!-- Calculate those variables needed in the tendency terms which need
469	!-- global communication
470	IF ( .NOT. use_single_reference_value .AND. &
471	.NOT. use_initial_profile_as_reference ) THEN
472	!
473	!-- Horizontally averaged profiles to be used as reference state in
474	!-- buoyancy terms (WARNING: only the respective last call of
475	!-- calc_mean_profile defines the reference state!)
476	IF ( .NOT. neutral ) THEN
477	CALL calc_mean_profile( pt, 4 )
478	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
479	ENDIF
480	IF ( ocean ) THEN
481	CALL calc_mean_profile( rho, 64 )
482	ref_state(:) = hom(:,1,64,0)
483	ENDIF
484	IF ( humidity ) THEN
485	CALL calc_mean_profile( vpt, 44 )
486	ref_state(:) = hom(:,1,44,0)
487	ENDIF
488
489	ENDIF
490
491	IF ( .NOT. constant_diffusion ) CALL production_e_init
492	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
493	intermediate_timestep_count == 1 ) CALL ws_statistics
494	!
495	!-- In case of nudging calculate current nudging time scale and horizontal
496	!-- means of u, v, pt and q
497	IF ( nudging ) THEN
498	CALL calc_tnudge( simulated_time )
499	CALL calc_mean_profile( u, 1 )
500	CALL calc_mean_profile( v, 2 )
501	CALL calc_mean_profile( pt, 4 )
502	CALL calc_mean_profile( q, 41 )
503	ENDIF
504
505	!
506	!-- Solve the prognostic equations. A fast cache optimized version with
507	!-- only one single loop is used in case of Piascek-Williams advection
508	!-- scheme. NEC vector machines use a different version, because
509	!-- in the other versions a good vectorization is prohibited due to
510	!-- inlining problems.
511	IF ( loop_optimization == 'cache' ) THEN
512	CALL prognostic_equations_cache
513	ELSEIF ( loop_optimization == 'vector' ) THEN
514	CALL prognostic_equations_vector
515	ELSEIF ( loop_optimization == 'acc' ) THEN
516	i_left = nxl; i_right = nxr
517	j_south = nys; j_north = nyn
518	CALL prognostic_equations_acc
519
520	! i_left = nxl; i_right = nxl+nbgp-1
521	! j_south = nys; j_north = nyn
522	! CALL prognostic_equations_acc
523	! i_left = nxr-nbgp+1; i_right = nxr
524	! j_south = nys; j_north = nyn
525	! CALL prognostic_equations_acc
526
527	!
528	!-- Exchange of ghost points (lateral boundary conditions)
529	IF ( background_communication ) THEN
530
531	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
532
533	send_receive = 'lr'
534	sendrecv_in_background = .TRUE.
535	req = 0
536	req_count = 0
537
538	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
539	on_device = .TRUE. ! to be removed after complete porting
540	ELSE ! of ghost point exchange
541	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
542	ENDIF
543
544	CALL exchange_horiz( u_p, nbgp )
545	CALL exchange_horiz( v_p, nbgp )
546	CALL exchange_horiz( w_p, nbgp )
547	CALL exchange_horiz( pt_p, nbgp )
548	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
549	IF ( ocean ) THEN
550	CALL exchange_horiz( sa_p, nbgp )
551	CALL exchange_horiz( rho, nbgp )
552	CALL exchange_horiz( prho, nbgp )
553	ENDIF
554	IF ( humidity ) THEN
555	CALL exchange_horiz( q_p, nbgp )
556	IF ( cloud_physics .AND. microphysics_seifert ) THEN
557	CALL exchange_horiz( qr_p, nbgp )
558	CALL exchange_horiz( nr_p, nbgp )
559	ENDIF
560	ENDIF
561	IF ( cloud_droplets ) THEN
562	CALL exchange_horiz( ql, nbgp )
563	CALL exchange_horiz( ql_c, nbgp )
564	CALL exchange_horiz( ql_v, nbgp )
565	CALL exchange_horiz( ql_vp, nbgp )
566	ENDIF
567	IF ( wang_kernel .OR. collision_turbulence .OR. &
568	use_sgs_for_particles ) THEN
569	CALL exchange_horiz( diss, nbgp )
570	ENDIF
571	IF ( passive_scalar ) CALL exchange_horiz( s_p, nbgp )
572
573	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
574	on_device = .FALSE. ! to be removed after complete porting
575	ELSE ! of ghost point exchange
576	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
577	ENDIF
578
579	sendrecv_in_background = .FALSE.
580
581	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
582
583	ENDIF
584
585	! i_left = nxl+nbgp; i_right = nxr-nbgp
586	! j_south = nys; j_north = nys+nbgp-1
587	! CALL prognostic_equations_acc
588	! i_left = nxl+nbgp; i_right = nxr-nbgp
589	! j_south = nyn-nbgp+1; j_north = nyn
590	! CALL prognostic_equations_acc
591
592	IF ( background_communication ) THEN
593	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
594	#if defined( __parallel )
595	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
596	#endif
597	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
598
599	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
600
601	send_receive = 'ns'
602	sendrecv_in_background = .TRUE.
603	req = 0
604	req_count = 0
605
606	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
607	on_device = .TRUE. ! to be removed after complete porting
608	ELSE ! of ghost point exchange
609	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
610	ENDIF
611
612	CALL exchange_horiz( u_p, nbgp )
613	CALL exchange_horiz( v_p, nbgp )
614	CALL exchange_horiz( w_p, nbgp )
615	CALL exchange_horiz( pt_p, nbgp )
616	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
617	IF ( ocean ) THEN
618	CALL exchange_horiz( sa_p, nbgp )
619	CALL exchange_horiz( rho, nbgp )
620	CALL exchange_horiz( prho, nbgp )
621	ENDIF
622	IF ( humidity ) THEN
623	CALL exchange_horiz( q_p, nbgp )
624	IF ( cloud_physics .AND. microphysics_seifert ) THEN
625	CALL exchange_horiz( qr_p, nbgp )
626	CALL exchange_horiz( nr_p, nbgp )
627	ENDIF
628	ENDIF
629	IF ( cloud_droplets ) THEN
630	CALL exchange_horiz( ql, nbgp )
631	CALL exchange_horiz( ql_c, nbgp )
632	CALL exchange_horiz( ql_v, nbgp )
633	CALL exchange_horiz( ql_vp, nbgp )
634	ENDIF
635	IF ( wang_kernel .OR. collision_turbulence .OR. &
636	use_sgs_for_particles ) THEN
637	CALL exchange_horiz( diss, nbgp )
638	ENDIF
639	IF ( passive_scalar ) CALL exchange_horiz( s_p, nbgp )
640
641	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
642	on_device = .FALSE. ! to be removed after complete porting
643	ELSE ! of ghost point exchange
644	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
645	ENDIF
646
647	sendrecv_in_background = .FALSE.
648
649	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
650
651	ENDIF
652
653	! i_left = nxl+nbgp; i_right = nxr-nbgp
654	! j_south = nys+nbgp; j_north = nyn-nbgp
655	! CALL prognostic_equations_acc
656
657	IF ( background_communication ) THEN
658	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
659	#if defined( __parallel )
660	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
661	#endif
662	send_receive = 'al'
663	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
664	ENDIF
665
666	ENDIF
667
668	!
669	!-- Particle transport/physics with the Lagrangian particle model
670	!-- (only once during intermediate steps, because it uses an Euler-step)
671	!-- ### particle model should be moved before prognostic_equations, in order
672	!-- to regard droplet interactions directly
673	IF ( particle_advection .AND. &
674	simulated_time >= particle_advection_start .AND. &
675	intermediate_timestep_count == 1 ) THEN
676	CALL lpm
677	first_call_lpm = .FALSE.
678	ENDIF
679
680	!
681	!-- Interaction of droplets with temperature and specific humidity.
682	!-- Droplet condensation and evaporation is calculated within
683	!-- advec_particles.
684	IF ( cloud_droplets .AND. &
685	intermediate_timestep_count == intermediate_timestep_count_max )&
686	THEN
687	CALL interaction_droplets_ptq
688	ENDIF
689
690	!
691	!-- Exchange of ghost points (lateral boundary conditions)
692	IF ( .NOT. background_communication ) THEN
693
694	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
695
696	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
697	on_device = .TRUE. ! to be removed after complete porting
698	ELSE ! of ghost point exchange
699	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
700	ENDIF
701
702	CALL exchange_horiz( u_p, nbgp )
703	CALL exchange_horiz( v_p, nbgp )
704	CALL exchange_horiz( w_p, nbgp )
705	CALL exchange_horiz( pt_p, nbgp )
706	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
707	IF ( ocean ) THEN
708	CALL exchange_horiz( sa_p, nbgp )
709	CALL exchange_horiz( rho, nbgp )
710	CALL exchange_horiz( prho, nbgp )
711	ENDIF
712	IF ( humidity ) THEN
713	CALL exchange_horiz( q_p, nbgp )
714	IF ( cloud_physics .AND. microphysics_seifert ) THEN
715	CALL exchange_horiz( qr_p, nbgp )
716	CALL exchange_horiz( nr_p, nbgp )
717	ENDIF
718	ENDIF
719	IF ( cloud_droplets ) THEN
720	CALL exchange_horiz( ql, nbgp )
721	CALL exchange_horiz( ql_c, nbgp )
722	CALL exchange_horiz( ql_v, nbgp )
723	CALL exchange_horiz( ql_vp, nbgp )
724	ENDIF
725	IF ( wang_kernel .OR. collision_turbulence .OR. &
726	use_sgs_for_particles ) THEN
727	CALL exchange_horiz( diss, nbgp )
728	ENDIF
729	IF ( passive_scalar ) CALL exchange_horiz( s_p, nbgp )
730
731	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
732	on_device = .FALSE. ! to be removed after complete porting
733	ELSE ! of ghost point exchange
734	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
735	ENDIF
736
737	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
738
739	ENDIF
740
741	!
742	!-- Boundary conditions for the prognostic quantities (except of the
743	!-- velocities at the outflow in case of a non-cyclic lateral wall)
744	CALL boundary_conds
745
746	!
747	!-- Swap the time levels in preparation for the next time step.
748	CALL swap_timelevel
749
750	IF ( nested_run ) THEN
751
752	CALL cpu_log( log_point(60), 'nesting', 'start' )
753	!
754	!-- Domain nesting. The data transfer subroutines pmci_parent_datatrans
755	!-- and pmci_child_datatrans are called inside the wrapper
756	!-- subroutine pmci_datatrans according to the control parameters
757	!-- nesting_mode and nesting_datatransfer_mode.
758	!-- TO_DO: why is nesting_mode given as a parameter here?
759	CALL pmci_datatrans( nesting_mode )
760
761	IF ( TRIM( nesting_mode ) == 'two-way' .OR. &
762	nesting_mode == 'vertical' ) THEN
763	!
764	!-- Exchange_horiz is needed for all parent-domains after the
765	!-- anterpolation
766	CALL exchange_horiz( u, nbgp )
767	CALL exchange_horiz( v, nbgp )
768	CALL exchange_horiz( w, nbgp )
769	IF ( .NOT. neutral ) CALL exchange_horiz( pt, nbgp )
770	IF ( humidity ) CALL exchange_horiz( q, nbgp )
771	IF ( passive_scalar ) CALL exchange_horiz( s, nbgp )
772	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
773	ENDIF
774	!
775	!-- Correct the w top-BC in nest domains to ensure mass conservation.
776	!-- This action must never be done for the root domain. Vertical
777	!-- nesting implies mass conservation.
778	IF ( nest_domain ) THEN
779	CALL pmci_ensure_nest_mass_conservation
780	ENDIF
781
782	CALL cpu_log( log_point(60), 'nesting', 'stop' )
783
784	ENDIF
785
786	!
787	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
788	!-- when a sloping surface is used
789	IF ( sloping_surface ) THEN
790	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
791	pt_slope_offset
792	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
793	pt_slope_offset
794	ENDIF
795
796	!
797	!-- Impose a turbulent inflow using the recycling method
798	IF ( turbulent_inflow ) CALL inflow_turbulence
799
800	!
801	!-- Impose a random perturbation on the horizontal velocity field
802	IF ( create_disturbances .AND. &
803	( call_psolver_at_all_substeps .AND. &
804	intermediate_timestep_count == intermediate_timestep_count_max )&
805	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
806	intermediate_timestep_count == 1 ) ) &
807	THEN
808	time_disturb = time_disturb + dt_3d
809	IF ( time_disturb >= dt_disturb ) THEN
810	!$acc update host( u, v )
811	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
812	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
813	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
814	CALL disturb_field( nzb_u_inner, tend, u )
815	CALL disturb_field( nzb_v_inner, tend, v )
816	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
817	!
818	!-- Runs with a non-cyclic lateral wall need perturbations
819	!-- near the inflow throughout the whole simulation
820	dist_range = 1
821	CALL disturb_field( nzb_u_inner, tend, u )
822	CALL disturb_field( nzb_v_inner, tend, v )
823	dist_range = 0
824	ENDIF
825	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
826	!$acc update device( u, v )
827	time_disturb = time_disturb - dt_disturb
828	ENDIF
829	ENDIF
830
831	!
832	!-- Reduce the velocity divergence via the equation for perturbation
833	!-- pressure.
834	IF ( intermediate_timestep_count == 1 .OR. &
835	call_psolver_at_all_substeps ) THEN
836	CALL pres
837	ENDIF
838
839	!
840	!-- If required, compute liquid water content
841	IF ( cloud_physics ) THEN
842	CALL calc_liquid_water_content
843	!$acc update device( ql )
844	ENDIF
845	!
846	!-- If required, compute virtual potential temperature
847	IF ( humidity ) THEN
848	CALL compute_vpt
849	!$acc update device( vpt )
850	ENDIF
851
852	!
853	!-- Compute the diffusion quantities
854	IF ( .NOT. constant_diffusion ) THEN
855
856	!
857	!-- Determine surface fluxes shf and qsws and surface values
858	!-- pt_surface and q_surface in dependence on data from external
859	!-- file LSF_DATA respectively
860	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
861	intermediate_timestep_count == intermediate_timestep_count_max )&
862	THEN
863	CALL ls_forcing_surf ( simulated_time )
864	ENDIF
865
866	!
867	!-- First the vertical fluxes in the surface (constant flux) layer are computed
868	IF ( constant_flux_layer ) THEN
869	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
870	CALL surface_layer_fluxes
871	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
872	ENDIF
873
874	!
875	!-- If required, solve the energy balance for the surface and run soil
876	!-- model
877	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
878
879	CALL cpu_log( log_point(54), 'land_surface', 'start' )
880	CALL lsm_energy_balance
881	CALL lsm_soil_model
882	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
883	ENDIF
884
885	!
886	!-- If required, solve the energy balance for urban surfaces and run
887	!-- the material heat model
888	IF (urban_surface) THEN
889	CALL cpu_log( log_point(74), 'urban_surface', 'start' )
890	CALL usm_surface_energy_balance
891	IF ( usm_material_model ) THEN
892	CALL usm_material_heat_model
893	ENDIF
894	CALL cpu_log( log_point(74), 'urban_surface', 'stop' )
895	ENDIF
896
897	!
898	!-- Compute the diffusion coefficients
899	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
900	IF ( .NOT. humidity ) THEN
901	IF ( ocean ) THEN
902	CALL diffusivities( prho, prho_reference )
903	ELSE
904	CALL diffusivities( pt, pt_reference )
905	ENDIF
906	ELSE
907	CALL diffusivities( vpt, pt_reference )
908	ENDIF
909	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
910
911	ENDIF
912
913	!
914	!-- If required, calculate radiative fluxes and heating rates
915	IF ( radiation .AND. intermediate_timestep_count &
916	== intermediate_timestep_count_max .AND. simulated_time > &
917	skip_time_do_radiation ) THEN
918
919	time_radiation = time_radiation + dt_3d
920
921	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
922	THEN
923
924	CALL cpu_log( log_point(50), 'radiation', 'start' )
925
926	IF ( .NOT. force_radiation_call ) THEN
927	time_radiation = time_radiation - dt_radiation
928	ENDIF
929
930	CALL radiation_control
931
932	CALL cpu_log( log_point(50), 'radiation', 'stop' )
933
934	IF (urban_surface) THEN
935	CALL cpu_log( log_point(75), 'usm_radiation', 'start' )
936	CALL usm_radiation
937	CALL cpu_log( log_point(75), 'usm_radiation', 'stop' )
938	ENDIF
939
940	ENDIF
941	ENDIF
942
943	ENDDO ! Intermediate step loop
944
945	!
946	!-- Increase simulation time and output times
947	nr_timesteps_this_run = nr_timesteps_this_run + 1
948	current_timestep_number = current_timestep_number + 1
949	simulated_time = simulated_time + dt_3d
950	simulated_time_chr = time_to_string( simulated_time )
951	time_since_reference_point = simulated_time - coupling_start_time
952
953
954
955	IF ( simulated_time >= skip_time_data_output_av ) THEN
956	time_do_av = time_do_av + dt_3d
957	ENDIF
958	IF ( simulated_time >= skip_time_do2d_xy ) THEN
959	time_do2d_xy = time_do2d_xy + dt_3d
960	ENDIF
961	IF ( simulated_time >= skip_time_do2d_xz ) THEN
962	time_do2d_xz = time_do2d_xz + dt_3d
963	ENDIF
964	IF ( simulated_time >= skip_time_do2d_yz ) THEN
965	time_do2d_yz = time_do2d_yz + dt_3d
966	ENDIF
967	IF ( simulated_time >= skip_time_do3d ) THEN
968	time_do3d = time_do3d + dt_3d
969	ENDIF
970	DO mid = 1, masks
971	IF ( simulated_time >= skip_time_domask(mid) ) THEN
972	time_domask(mid)= time_domask(mid) + dt_3d
973	ENDIF
974	ENDDO
975	time_dvrp = time_dvrp + dt_3d
976	IF ( simulated_time >= skip_time_dosp ) THEN
977	time_dosp = time_dosp + dt_3d
978	ENDIF
979	time_dots = time_dots + dt_3d
980	IF ( .NOT. first_call_lpm ) THEN
981	time_dopts = time_dopts + dt_3d
982	ENDIF
983	IF ( simulated_time >= skip_time_dopr ) THEN
984	time_dopr = time_dopr + dt_3d
985	ENDIF
986	time_dopr_listing = time_dopr_listing + dt_3d
987	time_run_control = time_run_control + dt_3d
988
989	!
990	!-- Data exchange between coupled models
991	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
992	time_coupling = time_coupling + dt_3d
993
994	!
995	!-- In case of model termination initiated by the local model
996	!-- (terminate_coupled > 0), the coupler must be skipped because it would
997	!-- cause an MPI intercomminucation hang.
998	!-- If necessary, the coupler will be called at the beginning of the
999	!-- next restart run.
1000	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
1001	CALL surface_coupler
1002	time_coupling = time_coupling - dt_coupling
1003	ENDDO
1004	ENDIF
1005
1006	!
1007	!-- Execute user-defined actions
1008	CALL user_actions( 'after_integration' )
1009
1010	!
1011	!-- If Galilei transformation is used, determine the distance that the
1012	!-- model has moved so far
1013	IF ( galilei_transformation ) THEN
1014	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
1015	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
1016	ENDIF
1017
1018	!
1019	!-- Check, if restart is necessary (because cpu-time is expiring or
1020	!-- because it is forced by user) and set stop flag
1021	!-- This call is skipped if the remote model has already initiated a restart.
1022	IF ( .NOT. terminate_run ) CALL check_for_restart
1023
1024	!
1025	!-- Carry out statistical analysis and output at the requested output times.
1026	!-- The MOD function is used for calculating the output time counters (like
1027	!-- time_dopr) in order to regard a possible decrease of the output time
1028	!-- interval in case of restart runs
1029
1030	!
1031	!-- Set a flag indicating that so far no statistics have been created
1032	!-- for this time step
1033	flow_statistics_called = .FALSE.
1034
1035	!
1036	!-- If required, call flow_statistics for averaging in time
1037	IF ( averaging_interval_pr /= 0.0_wp .AND. &
1038	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
1039	simulated_time >= skip_time_dopr ) THEN
1040	time_dopr_av = time_dopr_av + dt_3d
1041	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
1042	do_sum = .TRUE.
1043	time_dopr_av = MOD( time_dopr_av, &
1044	MAX( dt_averaging_input_pr, dt_3d ) )
1045	ENDIF
1046	ENDIF
1047	IF ( do_sum ) CALL flow_statistics
1048
1049	!
1050	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
1051	IF ( averaging_interval /= 0.0_wp .AND. &
1052	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
1053	simulated_time >= skip_time_data_output_av ) &
1054	THEN
1055	time_do_sla = time_do_sla + dt_3d
1056	IF ( time_do_sla >= dt_averaging_input ) THEN
1057	CALL sum_up_3d_data
1058	average_count_3d = average_count_3d + 1
1059	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
1060	ENDIF
1061	ENDIF
1062
1063	!
1064	!-- Calculate spectra for time averaging
1065	IF ( averaging_interval_sp /= 0.0_wp .AND. &
1066	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
1067	simulated_time >= skip_time_dosp ) THEN
1068	time_dosp_av = time_dosp_av + dt_3d
1069	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
1070	CALL calc_spectra
1071	time_dosp_av = MOD( time_dosp_av, &
1072	MAX( dt_averaging_input_pr, dt_3d ) )
1073	ENDIF
1074	ENDIF
1075
1076	!
1077	!-- Call flight module and output data
1078	IF ( virtual_flight ) THEN
1079	CALL flight_measurement
1080	CALL data_output_flight
1081	ENDIF
1082
1083	!
1084	!-- Profile output (ASCII) on file
1085	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1086	CALL print_1d
1087	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1088	dt_3d ) )
1089	ENDIF
1090
1091	!
1092	!-- Graphic output for PROFIL
1093	IF ( time_dopr >= dt_dopr ) THEN
1094	IF ( dopr_n /= 0 ) CALL data_output_profiles
1095	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1096	time_dopr_av = 0.0_wp ! due to averaging (see above)
1097	ENDIF
1098
1099	!
1100	!-- Graphic output for time series
1101	IF ( time_dots >= dt_dots ) THEN
1102	CALL data_output_tseries
1103	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1104	ENDIF
1105
1106	!
1107	!-- Output of spectra (formatted for use with PROFIL), in case of no
1108	!-- time averaging, spectra has to be calculated before
1109	IF ( time_dosp >= dt_dosp ) THEN
1110	IF ( average_count_sp == 0 ) CALL calc_spectra
1111	CALL data_output_spectra
1112	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1113	ENDIF
1114
1115	!
1116	!-- 2d-data output (cross-sections)
1117	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1118	CALL data_output_2d( 'xy', 0 )
1119	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1120	ENDIF
1121	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1122	CALL data_output_2d( 'xz', 0 )
1123	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1124	ENDIF
1125	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1126	CALL data_output_2d( 'yz', 0 )
1127	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1128	ENDIF
1129
1130	!
1131	!-- 3d-data output (volume data)
1132	IF ( time_do3d >= dt_do3d ) THEN
1133	CALL data_output_3d( 0 )
1134	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1135	ENDIF
1136
1137	!
1138	!-- Masked data output
1139	DO mid = 1, masks
1140	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1141	CALL data_output_mask( 0 )
1142	time_domask(mid) = MOD( time_domask(mid), &
1143	MAX( dt_domask(mid), dt_3d ) )
1144	ENDIF
1145	ENDDO
1146
1147	!
1148	!-- Output of time-averaged 2d/3d/masked data
1149	IF ( time_do_av >= dt_data_output_av ) THEN
1150	CALL average_3d_data
1151	CALL data_output_2d( 'xy', 1 )
1152	CALL data_output_2d( 'xz', 1 )
1153	CALL data_output_2d( 'yz', 1 )
1154	CALL data_output_3d( 1 )
1155	DO mid = 1, masks
1156	CALL data_output_mask( 1 )
1157	ENDDO
1158	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1159	ENDIF
1160
1161	!
1162	!-- Output of particle time series
1163	IF ( particle_advection ) THEN
1164	IF ( time_dopts >= dt_dopts .OR. &
1165	( simulated_time >= particle_advection_start .AND. &
1166	first_call_lpm ) ) THEN
1167	CALL data_output_ptseries
1168	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1169	ENDIF
1170	ENDIF
1171
1172	!
1173	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1174	#if defined( __dvrp_graphics )
1175	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1176	#endif
1177	IF ( time_dvrp >= dt_dvrp ) THEN
1178	CALL data_output_dvrp
1179	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1180	ENDIF
1181	#if defined( __dvrp_graphics )
1182	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1183	#endif
1184
1185	!
1186	!-- If required, set the heat flux for the next time step at a random value
1187	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
1188
1189	!
1190	!-- Execute user-defined actions
1191	CALL user_actions( 'after_timestep' )
1192
1193	!
1194	!-- Determine size of next time step. Save timestep dt_3d because it is
1195	!-- newly calculated in routine timestep, but required further below for
1196	!-- steering the run control output interval
1197	dt_3d_old = dt_3d
1198	CALL timestep
1199
1200	!
1201	!-- Synchronize the timestep in case of nested run.
1202	IF ( nested_run ) THEN
1203	!
1204	!-- Synchronize by unifying the time step.
1205	!-- Global minimum of all time-steps is used for all.
1206	CALL pmci_synchronize
1207	ENDIF
1208
1209	!
1210	!-- Computation and output of run control parameters.
1211	!-- This is also done whenever perturbations have been imposed
1212	IF ( time_run_control >= dt_run_control .OR. &
1213	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
1214	THEN
1215	CALL run_control
1216	IF ( time_run_control >= dt_run_control ) THEN
1217	time_run_control = MOD( time_run_control, &
1218	MAX( dt_run_control, dt_3d_old ) )
1219	ENDIF
1220	ENDIF
1221
1222	!
1223	!-- Output elapsed simulated time in form of a progress bar on stdout
1224	IF ( myid == 0 ) CALL output_progress_bar
1225
1226	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1227
1228
1229	ENDDO ! time loop
1230
1231	IF ( myid == 0 ) CALL finish_progress_bar
1232
1233	#if defined( __dvrp_graphics )
1234	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1235	#endif
1236
1237	CALL location_message( 'finished time-stepping', .TRUE. )
1238
1239	END SUBROUTINE time_integration

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