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source: palm/trunk/SOURCE/time_integration.f90 @ 2414

Last change on this file since 2414 was 2365, checked in by kanani, 7 years ago
Vertical nesting implemented (SadiqHuq?)
Property svn:keywords set to `Id`
File size: 45.1 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 1997-2017 Leibniz Universitaet Hannover
18	!------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: time_integration.f90 2365 2017-08-21 14:59:59Z Giersch $
27	! Vertical grid nesting implemented (SadiqHuq)
28	!
29	! 2320 2017-07-21 12:47:43Z suehring
30	! Set bottom boundary conditions after nesting interpolation and anterpolation
31	!
32	! 2299 2017-06-29 10:14:38Z maronga
33	! Call of soil model adjusted
34	!
35	! 2292 2017-06-20 09:51:42Z schwenkel
36	! Implementation of new microphysic scheme: cloud_scheme = 'morrison'
37	! includes two more prognostic equations for cloud drop concentration (nc)
38	! and cloud water content (qc).
39	!
40	! 2271 2017-06-09 12:34:55Z sward
41	! Start timestep message changed
42	!
43	! 2259 2017-06-08 09:09:11Z gronemeier
44	! Implemented synthetic turbulence generator
45	!
46	! 2233 2017-05-30 18:08:54Z suehring
47	!
48	! 2232 2017-05-30 17:47:52Z suehring
49	! Adjustments to new topography and surface concept
50	! Modify passed parameters for disturb_field
51	!
52	! 2178 2017-03-17 11:07:39Z hellstea
53	! Setting perturbations at all times near inflow boundary is removed
54	! in case of nested boundaries
55	!
56	! 2174 2017-03-13 08:18:57Z maronga
57	! Added support for nesting with cloud microphysics
58	!
59	! 2118 2017-01-17 16:38:49Z raasch
60	! OpenACC directives and related code removed
61	!
62	! 2050 2016-11-08 15:00:55Z gronemeier
63	! Implement turbulent outflow condition
64	!
65	! 2031 2016-10-21 15:11:58Z knoop
66	! renamed variable rho to rho_ocean
67	!
68	! 2011 2016-09-19 17:29:57Z kanani
69	! Flag urban_surface is now defined in module control_parameters,
70	! removed commented CALLs of global_min_max.
71	!
72	! 2007 2016-08-24 15:47:17Z kanani
73	! Added CALLs for new urban surface model
74	!
75	! 2000 2016-08-20 18:09:15Z knoop
76	! Forced header and separation lines into 80 columns
77	!
78	! 1976 2016-07-27 13:28:04Z maronga
79	! Simplified calls to radiation model
80	!
81	! 1960 2016-07-12 16:34:24Z suehring
82	! Separate humidity and passive scalar
83	!
84	! 1957 2016-07-07 10:43:48Z suehring
85	! flight module added
86	!
87	! 1919 2016-05-27 14:51:23Z raasch
88	! Initial version of purely vertical nesting introduced.
89	!
90	! 1918 2016-05-27 14:35:57Z raasch
91	! determination of time step moved to the end of the time step loop,
92	! the first time step is now always calculated before the time step loop (i.e.
93	! also in case of restart runs)
94	!
95	! 1914 2016-05-26 14:44:07Z witha
96	! Added call for wind turbine model
97	!
98	! 1878 2016-04-19 12:30:36Z hellstea
99	! Synchronization for nested runs rewritten
100	!
101	! 1853 2016-04-11 09:00:35Z maronga
102	! Adjusted for use with radiation_scheme = constant
103	!
104	! 1849 2016-04-08 11:33:18Z hoffmann
105	! Adapted for modularization of microphysics
106	!
107	! 1833 2016-04-07 14:23:03Z raasch
108	! spectrum renamed spectra_mod, spectra related variables moved to spectra_mod
109	!
110	! 1831 2016-04-07 13:15:51Z hoffmann
111	! turbulence renamed collision_turbulence
112	!
113	! 1822 2016-04-07 07:49:42Z hoffmann
114	! icloud_scheme replaced by microphysics_*
115	!
116	! 1808 2016-04-05 19:44:00Z raasch
117	! output message in case unscheduled radiation calls removed
118	!
119	! 1797 2016-03-21 16:50:28Z raasch
120	! introduction of different datatransfer modes
121	!
122	! 1791 2016-03-11 10:41:25Z raasch
123	! call of pmci_update_new removed
124	!
125	! 1786 2016-03-08 05:49:27Z raasch
126	! +module spectrum
127	!
128	! 1783 2016-03-06 18:36:17Z raasch
129	! switch back of netcdf data format for mask output moved to the mask output
130	! routine
131	!
132	! 1781 2016-03-03 15:12:23Z raasch
133	! some pmc calls removed at the beginning (before timeloop),
134	! pmc initialization moved to the main program
135	!
136	! 1764 2016-02-28 12:45:19Z raasch
137	! PMC_ACTIVE flags removed,
138	! bugfix: nest synchronization after first call of timestep
139	!
140	! 1762 2016-02-25 12:31:13Z hellstea
141	! Introduction of nested domain feature
142	!
143	! 1736 2015-12-04 08:56:33Z raasch
144	! no perturbations added to total domain if energy limit has been set zero
145	!
146	! 1691 2015-10-26 16:17:44Z maronga
147	! Added option for spin-ups without land surface and radiation models. Moved calls
148	! for radiation and lan surface schemes.
149	!
150	! 1682 2015-10-07 23:56:08Z knoop
151	! Code annotations made doxygen readable
152	!
153	! 1671 2015-09-25 03:29:37Z raasch
154	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
155	! for particles
156	!
157	! 1585 2015-04-30 07:05:52Z maronga
158	! Moved call of radiation scheme. Added support for RRTM
159	!
160	! 1551 2015-03-03 14:18:16Z maronga
161	! Added interface for different radiation schemes.
162	!
163	! 1496 2014-12-02 17:25:50Z maronga
164	! Added calls for the land surface model and radiation scheme
165	!
166	! 1402 2014-05-09 14:25:13Z raasch
167	! location messages modified
168	!
169	! 1384 2014-05-02 14:31:06Z raasch
170	! location messages added
171	!
172	! 1380 2014-04-28 12:40:45Z heinze
173	! CALL of nudge_ref added
174	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
175	!
176	! 1365 2014-04-22 15:03:56Z boeske
177	! Reset sums_ls_l to zero at each timestep
178	! +sums_ls_l
179	! Calculation of reference state (previously in subroutine calc_mean_profile)
180
181	! 1342 2014-03-26 17:04:47Z kanani
182	! REAL constants defined as wp-kind
183	!
184	! 1320 2014-03-20 08:40:49Z raasch
185	! ONLY-attribute added to USE-statements,
186	! kind-parameters added to all INTEGER and REAL declaration statements,
187	! kinds are defined in new module kinds,
188	! old module precision_kind is removed,
189	! revision history before 2012 removed,
190	! comment fields (!:) to be used for variable explanations added to
191	! all variable declaration statements
192	! 1318 2014-03-17 13:35:16Z raasch
193	! module interfaces removed
194	!
195	! 1308 2014-03-13 14:58:42Z fricke
196	! +netcdf_data_format_save
197	! For masked data, parallel netcdf output is not tested so far, hence
198	! netcdf_data_format is switched back to non-paralell output.
199	!
200	! 1276 2014-01-15 13:40:41Z heinze
201	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
202	!
203	! 1257 2013-11-08 15:18:40Z raasch
204	! acc-update-host directive for timestep removed
205	!
206	! 1241 2013-10-30 11:36:58Z heinze
207	! Generalize calc_mean_profile for wider use
208	! Determine shf and qsws in dependence on data from LSF_DATA
209	! Determine ug and vg in dependence on data from LSF_DATA
210	! 1221 2013-09-10 08:59:13Z raasch
211	! host update of arrays before timestep is called
212	!
213	! 1179 2013-06-14 05:57:58Z raasch
214	! mean profiles for reference state are only calculated if required,
215	! small bugfix for background communication
216	!
217	! 1171 2013-05-30 11:27:45Z raasch
218	! split of prognostic_equations deactivated (comment lines), for the time being
219	!
220	! 1128 2013-04-12 06:19:32Z raasch
221	! asynchronous transfer of ghost point data realized for acc-optimized version:
222	! prognostic_equations are first called two times for those points required for
223	! the left-right and north-south exchange, respectively, and then for the
224	! remaining points,
225	! those parts requiring global communication moved from prognostic_equations to
226	! here
227	!
228	! 1115 2013-03-26 18:16:16Z hoffmann
229	! calculation of qr and nr is restricted to precipitation
230	!
231	! 1113 2013-03-10 02:48:14Z raasch
232	! GPU-porting of boundary conditions,
233	! openACC directives updated
234	! formal parameter removed from routine boundary_conds
235	!
236	! 1111 2013-03-08 23:54:10Z raasch
237	! +internal timestep counter for cpu statistics added,
238	! openACC directives updated
239	!
240	! 1092 2013-02-02 11:24:22Z raasch
241	! unused variables removed
242	!
243	! 1065 2012-11-22 17:42:36Z hoffmann
244	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
245	!
246	! 1053 2012-11-13 17:11:03Z hoffmann
247	! exchange of ghost points for nr, qr added
248	!
249	! 1036 2012-10-22 13:43:42Z raasch
250	! code put under GPL (PALM 3.9)
251	!
252	! 1019 2012-09-28 06:46:45Z raasch
253	! non-optimized version of prognostic_equations removed
254	!
255	! 1015 2012-09-27 09:23:24Z raasch
256	! +call of prognostic_equations_acc
257	!
258	! 1001 2012-09-13 14:08:46Z raasch
259	! all actions concerning leapfrog- and upstream-spline-scheme removed
260	!
261	! 849 2012-03-15 10:35:09Z raasch
262	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
263	!
264	! 825 2012-02-19 03:03:44Z raasch
265	! wang_collision_kernel renamed wang_kernel
266	!
267	! Revision 1.1 1997/08/11 06:19:04 raasch
268	! Initial revision
269	!
270	!
271	! Description:
272	! ------------
273	!> Integration in time of the model equations, statistical analysis and graphic
274	!> output
275	!------------------------------------------------------------------------------!
276	SUBROUTINE time_integration
277
278
279	USE advec_ws, &
280	ONLY: ws_statistics
281
282	USE arrays_3d, &
283	ONLY: diss, dzu, e, e_p, nc, nc_p, nr, nr_p, prho, pt, pt_p, pt_init, &
284	q_init, q, qc, qc_p, ql, ql_c, ql_v, ql_vp, qr, qr_p, q_p, &
285	ref_state, rho_ocean, s, s_p, sa_p, tend, u, u_p, v, vpt, &
286	v_p, w, w_p
287
288	USE calc_mean_profile_mod, &
289	ONLY: calc_mean_profile
290
291	USE control_parameters, &
292	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
293	averaging_interval, averaging_interval_pr, &
294	bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
295	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
296	cloud_physics, constant_flux_layer, constant_heatflux, &
297	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
298	coupling_start_time, current_timestep_number, &
299	disturbance_created, disturbance_energy_limit, dist_range, &
300	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
301	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
302	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
303	dt_dopr_listing, dt_dots, dt_dvrp, dt_run_control, &
304	end_time, first_call_lpm, galilei_transformation, humidity, &
305	intermediate_timestep_count, intermediate_timestep_count_max, &
306	land_surface, large_scale_forcing, &
307	loop_optimization, lsf_surf, lsf_vert, masks, &
308	microphysics_morrison, microphysics_seifert, mid, nest_domain, &
309	neutral, nr_timesteps_this_run, nudging, &
310	ocean, passive_scalar, &
311	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
312	run_coupled, simulated_time, simulated_time_chr, &
313	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
314	skip_time_do3d, skip_time_domask, skip_time_dopr, &
315	skip_time_data_output_av, sloping_surface, &
316	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
317	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
318	time_do3d, time_domask, time_dopr, time_dopr_av, &
319	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
320	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
321	time_run_control, time_since_reference_point, &
322	turbulent_inflow, turbulent_outflow, urban_surface, &
323	use_initial_profile_as_reference, &
324	use_single_reference_value, u_gtrans, v_gtrans, virtual_flight, &
325	ws_scheme_mom, ws_scheme_sca
326
327	USE cpulog, &
328	ONLY: cpu_log, log_point, log_point_s
329
330	USE flight_mod, &
331	ONLY: flight_measurement
332
333
334	USE indices, &
335	ONLY: nbgp, nx, nxl, nxlg, nxr, nxrg, nyn, nyng, nys, nysg, nzb, nzt
336
337	USE interaction_droplets_ptq_mod, &
338	ONLY: interaction_droplets_ptq
339
340	USE interfaces
341
342	USE kinds
343
344	USE land_surface_model_mod, &
345	ONLY: lsm_energy_balance, lsm_soil_model, &
346	skip_time_do_lsm
347
348	USE lsf_nudging_mod, &
349	ONLY: calc_tnudge, ls_forcing_surf, ls_forcing_vert, nudge_ref
350
351	USE microphysics_mod, &
352	ONLY: collision_turbulence
353
354	USE particle_attributes, &
355	ONLY: particle_advection, particle_advection_start, &
356	use_sgs_for_particles, wang_kernel
357
358	USE pegrid
359
360	USE pmc_interface, &
361	ONLY: nested_run, nesting_mode, pmci_boundary_conds, pmci_datatrans, &
362	pmci_ensure_nest_mass_conservation, pmci_synchronize
363
364	USE production_e_mod, &
365	ONLY: production_e_init
366
367	USE progress_bar, &
368	ONLY: finish_progress_bar, output_progress_bar
369
370	USE prognostic_equations_mod, &
371	ONLY: prognostic_equations_cache, prognostic_equations_vector
372
373	USE radiation_model_mod, &
374	ONLY: dt_radiation, force_radiation_call, radiation, radiation_control,&
375	skip_time_do_radiation, time_radiation
376
377	USE spectra_mod, &
378	ONLY: average_count_sp, averaging_interval_sp, calc_spectra, dt_dosp, &
379	skip_time_dosp
380
381	USE statistics, &
382	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l, u_max, &
383	u_max_ijk, v_max, v_max_ijk, w_max, w_max_ijk
384
385	USE surface_layer_fluxes_mod, &
386	ONLY: surface_layer_fluxes
387
388	USE surface_mod, &
389	ONLY: surf_def_h, surf_lsm_h, surf_usm_h
390
391	USE urban_surface_mod, &
392	ONLY: usm_material_heat_model, usm_material_model, &
393	usm_radiation, usm_surface_energy_balance
394
395	USE synthetic_turbulence_generator_mod, &
396	ONLY: stg_main, use_synthetic_turbulence_generator
397
398	USE user_actions_mod, &
399	ONLY: user_actions
400
401	USE wind_turbine_model_mod, &
402	ONLY: wind_turbine, wtm_forces
403
404	USE vertical_nesting_mod, &
405	ONLY: vnested, vnest_anterpolate, vnest_anterpolate_e, &
406	vnest_boundary_conds, vnest_boundary_conds_khkm, &
407	vnest_deallocate, vnest_init, vnest_init_fine, &
408	vnest_start_time
409
410	IMPLICIT NONE
411
412	CHARACTER (LEN=9) :: time_to_string !<
413
414	REAL(wp) :: dt_3d_old !< temporary storage of timestep to be used for
415	!< steering of run control output interval
416
417	!
418	!-- At beginning determine the first time step
419	CALL timestep
420
421	!
422	!-- Synchronize the timestep in case of nested run.
423	IF ( nested_run ) THEN
424	!
425	!-- Synchronization by unifying the time step.
426	!-- Global minimum of all time-steps is used for all.
427	CALL pmci_synchronize
428	ENDIF
429
430	!
431	!-- Determine and print out the run control quantities before the first time
432	!-- step of this run. For the initial run, some statistics (e.g. divergence)
433	!-- need to be determined first.
434	IF ( simulated_time == 0.0_wp ) CALL flow_statistics
435	CALL run_control
436
437	!
438	!-- Data exchange between coupled models in case that a call has been omitted
439	!-- at the end of the previous run of a job chain.
440	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled .AND. .NOT. vnested) THEN
441	!
442	!-- In case of model termination initiated by the local model the coupler
443	!-- must not be called because this would again cause an MPI hang.
444	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
445	CALL surface_coupler
446	time_coupling = time_coupling - dt_coupling
447	ENDDO
448	IF (time_coupling == 0.0_wp .AND. &
449	time_since_reference_point < dt_coupling ) &
450	THEN
451	time_coupling = time_since_reference_point
452	ENDIF
453	ENDIF
454
455	#if defined( __dvrp_graphics )
456	!
457	!-- Time measurement with dvrp software
458	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
459	#endif
460
461	CALL location_message( 'starting timestep-sequence', .TRUE. )
462	!
463	!-- Start of the time loop
464	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
465	.NOT. terminate_run )
466
467	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
468	!
469	!-- Vertical nesting: initialize fine grid
470	IF ( vnested ) THEN
471	IF ( .NOT. vnest_init .AND. simulated_time >= vnest_start_time ) THEN
472	CALL cpu_log( log_point(80), 'vnest_init', 'start' )
473	CALL vnest_init_fine
474	vnest_init = .TRUE.
475	CALL cpu_log( log_point(80), 'vnest_init', 'stop' )
476	ENDIF
477	ENDIF
478	!
479	!-- Determine ug, vg and w_subs in dependence on data from external file
480	!-- LSF_DATA
481	IF ( large_scale_forcing .AND. lsf_vert ) THEN
482	CALL ls_forcing_vert ( simulated_time )
483	sums_ls_l = 0.0_wp
484	ENDIF
485
486	!
487	!-- Set pt_init and q_init to the current profiles taken from
488	!-- NUDGING_DATA
489	IF ( nudging ) THEN
490	CALL nudge_ref ( simulated_time )
491	!
492	!-- Store temperature gradient at the top boundary for possible Neumann
493	!-- boundary condition
494	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
495	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
496	ENDIF
497
498	!
499	!-- Execute the user-defined actions
500	CALL user_actions( 'before_timestep' )
501
502	!
503	!-- Calculate forces by wind turbines
504	IF ( wind_turbine ) THEN
505
506	CALL cpu_log( log_point(55), 'wind_turbine', 'start' )
507
508	CALL wtm_forces
509
510	CALL cpu_log( log_point(55), 'wind_turbine', 'stop' )
511
512	ENDIF
513
514	!
515	!-- Start of intermediate step loop
516	intermediate_timestep_count = 0
517	DO WHILE ( intermediate_timestep_count < &
518	intermediate_timestep_count_max )
519
520	intermediate_timestep_count = intermediate_timestep_count + 1
521
522	!
523	!-- Set the steering factors for the prognostic equations which depend
524	!-- on the timestep scheme
525	CALL timestep_scheme_steering
526
527	!
528	!-- Calculate those variables needed in the tendency terms which need
529	!-- global communication
530	IF ( .NOT. use_single_reference_value .AND. &
531	.NOT. use_initial_profile_as_reference ) THEN
532	!
533	!-- Horizontally averaged profiles to be used as reference state in
534	!-- buoyancy terms (WARNING: only the respective last call of
535	!-- calc_mean_profile defines the reference state!)
536	IF ( .NOT. neutral ) THEN
537	CALL calc_mean_profile( pt, 4 )
538	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
539	ENDIF
540	IF ( ocean ) THEN
541	CALL calc_mean_profile( rho_ocean, 64 )
542	ref_state(:) = hom(:,1,64,0)
543	ENDIF
544	IF ( humidity ) THEN
545	CALL calc_mean_profile( vpt, 44 )
546	ref_state(:) = hom(:,1,44,0)
547	ENDIF
548
549	ENDIF
550
551	IF ( .NOT. constant_diffusion ) CALL production_e_init
552	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
553	intermediate_timestep_count == 1 ) CALL ws_statistics
554	!
555	!-- In case of nudging calculate current nudging time scale and horizontal
556	!-- means of u, v, pt and q
557	IF ( nudging ) THEN
558	CALL calc_tnudge( simulated_time )
559	CALL calc_mean_profile( u, 1 )
560	CALL calc_mean_profile( v, 2 )
561	CALL calc_mean_profile( pt, 4 )
562	CALL calc_mean_profile( q, 41 )
563	ENDIF
564
565	!
566	!-- Solve the prognostic equations. A fast cache optimized version with
567	!-- only one single loop is used in case of Piascek-Williams advection
568	!-- scheme. NEC vector machines use a different version, because
569	!-- in the other versions a good vectorization is prohibited due to
570	!-- inlining problems.
571	IF ( loop_optimization == 'cache' ) THEN
572	CALL prognostic_equations_cache
573	ELSEIF ( loop_optimization == 'vector' ) THEN
574	CALL prognostic_equations_vector
575	ENDIF
576
577	!
578	!-- Particle transport/physics with the Lagrangian particle model
579	!-- (only once during intermediate steps, because it uses an Euler-step)
580	!-- ### particle model should be moved before prognostic_equations, in order
581	!-- to regard droplet interactions directly
582	IF ( particle_advection .AND. &
583	simulated_time >= particle_advection_start .AND. &
584	intermediate_timestep_count == 1 ) THEN
585	CALL lpm
586	first_call_lpm = .FALSE.
587	ENDIF
588
589	!
590	!-- Interaction of droplets with temperature and specific humidity.
591	!-- Droplet condensation and evaporation is calculated within
592	!-- advec_particles.
593	IF ( cloud_droplets .AND. &
594	intermediate_timestep_count == intermediate_timestep_count_max )&
595	THEN
596	CALL interaction_droplets_ptq
597	ENDIF
598
599	!
600	!-- Exchange of ghost points (lateral boundary conditions)
601	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
602
603	CALL exchange_horiz( u_p, nbgp )
604	CALL exchange_horiz( v_p, nbgp )
605	CALL exchange_horiz( w_p, nbgp )
606	CALL exchange_horiz( pt_p, nbgp )
607	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
608	IF ( ocean ) THEN
609	CALL exchange_horiz( sa_p, nbgp )
610	CALL exchange_horiz( rho_ocean, nbgp )
611	CALL exchange_horiz( prho, nbgp )
612	ENDIF
613	IF ( humidity ) THEN
614	CALL exchange_horiz( q_p, nbgp )
615	IF ( cloud_physics .AND. microphysics_morrison ) THEN
616	CALL exchange_horiz( qc_p, nbgp )
617	CALL exchange_horiz( nc_p, nbgp )
618	ENDIF
619	IF ( cloud_physics .AND. microphysics_seifert ) THEN
620	CALL exchange_horiz( qr_p, nbgp )
621	CALL exchange_horiz( nr_p, nbgp )
622	ENDIF
623	ENDIF
624	IF ( cloud_droplets ) THEN
625	CALL exchange_horiz( ql, nbgp )
626	CALL exchange_horiz( ql_c, nbgp )
627	CALL exchange_horiz( ql_v, nbgp )
628	CALL exchange_horiz( ql_vp, nbgp )
629	ENDIF
630	IF ( wang_kernel .OR. collision_turbulence .OR. &
631	use_sgs_for_particles ) THEN
632	CALL exchange_horiz( diss, nbgp )
633	ENDIF
634	IF ( passive_scalar ) CALL exchange_horiz( s_p, nbgp )
635
636	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
637
638	!
639	!-- Boundary conditions for the prognostic quantities (except of the
640	!-- velocities at the outflow in case of a non-cyclic lateral wall)
641	CALL boundary_conds
642	!
643	!-- Swap the time levels in preparation for the next time step.
644	CALL swap_timelevel
645
646	!
647	!-- Vertical nesting: Interpolate fine grid data to the coarse grid
648	IF ( vnest_init ) THEN
649	CALL cpu_log( log_point(81), 'vnest_anterpolate', 'start' )
650	CALL vnest_anterpolate
651	CALL cpu_log( log_point(81), 'vnest_anterpolate', 'stop' )
652	ENDIF
653
654	IF ( nested_run ) THEN
655
656	CALL cpu_log( log_point(60), 'nesting', 'start' )
657	!
658	!-- Domain nesting. The data transfer subroutines pmci_parent_datatrans
659	!-- and pmci_child_datatrans are called inside the wrapper
660	!-- subroutine pmci_datatrans according to the control parameters
661	!-- nesting_mode and nesting_datatransfer_mode.
662	!-- TO_DO: why is nesting_mode given as a parameter here?
663	CALL pmci_datatrans( nesting_mode )
664
665	IF ( TRIM( nesting_mode ) == 'two-way' .OR. &
666	nesting_mode == 'vertical' ) THEN
667	!
668	!-- Exchange_horiz is needed for all parent-domains after the
669	!-- anterpolation
670	CALL exchange_horiz( u, nbgp )
671	CALL exchange_horiz( v, nbgp )
672	CALL exchange_horiz( w, nbgp )
673	IF ( .NOT. neutral ) CALL exchange_horiz( pt, nbgp )
674
675	IF ( humidity ) THEN
676
677	CALL exchange_horiz( q, nbgp )
678
679	IF ( cloud_physics .AND. microphysics_morrison ) THEN
680	CALL exchange_horiz( qc, nbgp )
681	CALL exchange_horiz( nc, nbgp )
682	ENDIF
683	IF ( cloud_physics .AND. microphysics_seifert ) THEN
684	CALL exchange_horiz( qr, nbgp )
685	CALL exchange_horiz( nr, nbgp )
686	ENDIF
687
688	ENDIF
689
690	IF ( passive_scalar ) CALL exchange_horiz( s, nbgp )
691	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
692	ENDIF
693	!
694	!-- Set boundary conditions again after interpolation and anterpolation.
695	CALL pmci_boundary_conds
696	!
697	!-- Correct the w top-BC in nest domains to ensure mass conservation.
698	!-- This action must never be done for the root domain. Vertical
699	!-- nesting implies mass conservation.
700	IF ( nest_domain ) THEN
701	CALL pmci_ensure_nest_mass_conservation
702	ENDIF
703
704	CALL cpu_log( log_point(60), 'nesting', 'stop' )
705
706	ENDIF
707
708	!
709	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
710	!-- when a sloping surface is used
711	IF ( sloping_surface ) THEN
712	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
713	pt_slope_offset
714	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
715	pt_slope_offset
716	ENDIF
717
718	!
719	!-- Impose a turbulent inflow using the recycling method
720	IF ( turbulent_inflow ) CALL inflow_turbulence
721
722	!
723	!-- Impose a turbulent inflow using synthetic generated turbulence
724	IF ( use_synthetic_turbulence_generator ) THEN
725	CALL stg_main
726	ENDIF
727
728	!
729	!-- Set values at outflow boundary using the special outflow condition
730	IF ( turbulent_outflow ) CALL outflow_turbulence
731
732	!
733	!-- Impose a random perturbation on the horizontal velocity field
734	IF ( create_disturbances .AND. &
735	( call_psolver_at_all_substeps .AND. &
736	intermediate_timestep_count == intermediate_timestep_count_max )&
737	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
738	intermediate_timestep_count == 1 ) ) &
739	THEN
740	time_disturb = time_disturb + dt_3d
741	IF ( time_disturb >= dt_disturb ) THEN
742	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
743	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
744	CALL disturb_field( 'u', tend, u )
745	CALL disturb_field( 'v', tend, v )
746	ELSEIF ( ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) &
747	.AND. .NOT. nest_domain ) THEN
748	!
749	!-- Runs with a non-cyclic lateral wall need perturbations
750	!-- near the inflow throughout the whole simulation
751	dist_range = 1
752	CALL disturb_field( 'u', tend, u )
753	CALL disturb_field( 'v', tend, v )
754	dist_range = 0
755	ENDIF
756	time_disturb = time_disturb - dt_disturb
757	ENDIF
758	ENDIF
759
760	!
761	!-- Reduce the velocity divergence via the equation for perturbation
762	!-- pressure.
763	IF ( intermediate_timestep_count == 1 .OR. &
764	call_psolver_at_all_substeps ) THEN
765
766	IF ( vnest_init ) THEN
767	!
768	!-- Compute pressure in the CG, interpolate top boundary conditions
769	!-- to the FG and then compute pressure in the FG
770	IF ( coupling_mode == 'vnested_crse' ) CALL pres
771
772	CALL cpu_log( log_point(82), 'vnest_bc', 'start' )
773	CALL vnest_boundary_conds
774	CALL cpu_log( log_point(82), 'vnest_bc', 'stop' )
775
776	IF ( coupling_mode == 'vnested_fine' ) CALL pres
777
778	!-- Anterpolate TKE, satisfy Germano Identity
779	CALL cpu_log( log_point(83), 'vnest_anter_e', 'start' )
780	CALL vnest_anterpolate_e
781	CALL cpu_log( log_point(83), 'vnest_anter_e', 'stop' )
782
783	ELSE
784
785	CALL pres
786
787	ENDIF
788
789	ENDIF
790
791	!
792	!-- If required, compute liquid water content
793	IF ( cloud_physics ) THEN
794	CALL calc_liquid_water_content
795	ENDIF
796	!
797	!-- If required, compute virtual potential temperature
798	IF ( humidity ) THEN
799	CALL compute_vpt
800	ENDIF
801
802	!
803	!-- Compute the diffusion quantities
804	IF ( .NOT. constant_diffusion ) THEN
805
806	!
807	!-- Determine surface fluxes shf and qsws and surface values
808	!-- pt_surface and q_surface in dependence on data from external
809	!-- file LSF_DATA respectively
810	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
811	intermediate_timestep_count == intermediate_timestep_count_max )&
812	THEN
813	CALL ls_forcing_surf( simulated_time )
814	ENDIF
815
816	!
817	!-- First the vertical (and horizontal) fluxes in the surface
818	!-- (constant flux) layer are computed
819	IF ( constant_flux_layer ) THEN
820	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
821	CALL surface_layer_fluxes
822	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
823	ENDIF
824
825	!
826	!-- If required, solve the energy balance for the surface and run soil
827	!-- model. Call for horizontal as well as vertical surfaces
828	IF ( land_surface .AND. time_since_reference_point > skip_time_do_lsm) THEN
829
830	CALL cpu_log( log_point(54), 'land_surface', 'start' )
831	!
832	!-- Call for horizontal upward-facing surfaces
833	CALL lsm_energy_balance( .TRUE., -1 )
834	CALL lsm_soil_model( .TRUE., -1, .TRUE. )
835	!
836	!-- Call for northward-facing surfaces
837	CALL lsm_energy_balance( .FALSE., 0 )
838	CALL lsm_soil_model( .FALSE., 0, .TRUE. )
839	!
840	!-- Call for southward-facing surfaces
841	CALL lsm_energy_balance( .FALSE., 1 )
842	CALL lsm_soil_model( .FALSE., 1, .TRUE. )
843	!
844	!-- Call for eastward-facing surfaces
845	CALL lsm_energy_balance( .FALSE., 2 )
846	CALL lsm_soil_model( .FALSE., 2, .TRUE. )
847	!
848	!-- Call for westward-facing surfaces
849	CALL lsm_energy_balance( .FALSE., 3 )
850	CALL lsm_soil_model( .FALSE., 3, .TRUE. )
851
852	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
853	ENDIF
854
855	!
856	!-- If required, solve the energy balance for urban surfaces and run
857	!-- the material heat model
858	IF (urban_surface) THEN
859	CALL cpu_log( log_point(74), 'urban_surface', 'start' )
860	CALL usm_surface_energy_balance
861	IF ( usm_material_model ) THEN
862	CALL usm_material_heat_model
863	ENDIF
864	CALL cpu_log( log_point(74), 'urban_surface', 'stop' )
865	ENDIF
866
867	!
868	!-- Compute the diffusion coefficients
869	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
870	IF ( .NOT. humidity ) THEN
871	IF ( ocean ) THEN
872	CALL diffusivities( prho, prho_reference )
873	ELSE
874	CALL diffusivities( pt, pt_reference )
875	ENDIF
876	ELSE
877	CALL diffusivities( vpt, pt_reference )
878	ENDIF
879
880	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
881
882	ENDIF
883
884	!
885	!-- If required, calculate radiative fluxes and heating rates
886	IF ( radiation .AND. intermediate_timestep_count &
887	== intermediate_timestep_count_max .AND. time_since_reference_point > &
888	skip_time_do_radiation ) THEN
889
890	time_radiation = time_radiation + dt_3d
891
892	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
893	THEN
894
895	CALL cpu_log( log_point(50), 'radiation', 'start' )
896
897	IF ( .NOT. force_radiation_call ) THEN
898	time_radiation = time_radiation - dt_radiation
899	ENDIF
900
901	CALL radiation_control
902
903	CALL cpu_log( log_point(50), 'radiation', 'stop' )
904
905	IF (urban_surface) THEN
906	CALL cpu_log( log_point(75), 'usm_radiation', 'start' )
907	CALL usm_radiation
908	CALL cpu_log( log_point(75), 'usm_radiation', 'stop' )
909	ENDIF
910
911	ENDIF
912	ENDIF
913
914	ENDDO ! Intermediate step loop
915
916	!
917	!-- Increase simulation time and output times
918	nr_timesteps_this_run = nr_timesteps_this_run + 1
919	current_timestep_number = current_timestep_number + 1
920	simulated_time = simulated_time + dt_3d
921	simulated_time_chr = time_to_string( simulated_time )
922	time_since_reference_point = simulated_time - coupling_start_time
923
924
925
926	IF ( simulated_time >= skip_time_data_output_av ) THEN
927	time_do_av = time_do_av + dt_3d
928	ENDIF
929	IF ( simulated_time >= skip_time_do2d_xy ) THEN
930	time_do2d_xy = time_do2d_xy + dt_3d
931	ENDIF
932	IF ( simulated_time >= skip_time_do2d_xz ) THEN
933	time_do2d_xz = time_do2d_xz + dt_3d
934	ENDIF
935	IF ( simulated_time >= skip_time_do2d_yz ) THEN
936	time_do2d_yz = time_do2d_yz + dt_3d
937	ENDIF
938	IF ( simulated_time >= skip_time_do3d ) THEN
939	time_do3d = time_do3d + dt_3d
940	ENDIF
941	DO mid = 1, masks
942	IF ( simulated_time >= skip_time_domask(mid) ) THEN
943	time_domask(mid)= time_domask(mid) + dt_3d
944	ENDIF
945	ENDDO
946	time_dvrp = time_dvrp + dt_3d
947	IF ( simulated_time >= skip_time_dosp ) THEN
948	time_dosp = time_dosp + dt_3d
949	ENDIF
950	time_dots = time_dots + dt_3d
951	IF ( .NOT. first_call_lpm ) THEN
952	time_dopts = time_dopts + dt_3d
953	ENDIF
954	IF ( simulated_time >= skip_time_dopr ) THEN
955	time_dopr = time_dopr + dt_3d
956	ENDIF
957	time_dopr_listing = time_dopr_listing + dt_3d
958	time_run_control = time_run_control + dt_3d
959
960	!
961	!-- Data exchange between coupled models
962	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled &
963	.AND. .NOT. vnested ) THEN
964	time_coupling = time_coupling + dt_3d
965
966	!
967	!-- In case of model termination initiated by the local model
968	!-- (terminate_coupled > 0), the coupler must be skipped because it would
969	!-- cause an MPI intercomminucation hang.
970	!-- If necessary, the coupler will be called at the beginning of the
971	!-- next restart run.
972	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
973	CALL surface_coupler
974	time_coupling = time_coupling - dt_coupling
975	ENDDO
976	ENDIF
977
978	!
979	!-- Execute user-defined actions
980	CALL user_actions( 'after_integration' )
981
982	!
983	!-- If Galilei transformation is used, determine the distance that the
984	!-- model has moved so far
985	IF ( galilei_transformation ) THEN
986	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
987	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
988	ENDIF
989
990	!
991	!-- Check, if restart is necessary (because cpu-time is expiring or
992	!-- because it is forced by user) and set stop flag
993	!-- This call is skipped if the remote model has already initiated a restart.
994	IF ( .NOT. terminate_run ) CALL check_for_restart
995
996	!
997	!-- Carry out statistical analysis and output at the requested output times.
998	!-- The MOD function is used for calculating the output time counters (like
999	!-- time_dopr) in order to regard a possible decrease of the output time
1000	!-- interval in case of restart runs
1001
1002	!
1003	!-- Set a flag indicating that so far no statistics have been created
1004	!-- for this time step
1005	flow_statistics_called = .FALSE.
1006
1007	!
1008	!-- If required, call flow_statistics for averaging in time
1009	IF ( averaging_interval_pr /= 0.0_wp .AND. &
1010	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
1011	simulated_time >= skip_time_dopr ) THEN
1012	time_dopr_av = time_dopr_av + dt_3d
1013	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
1014	do_sum = .TRUE.
1015	time_dopr_av = MOD( time_dopr_av, &
1016	MAX( dt_averaging_input_pr, dt_3d ) )
1017	ENDIF
1018	ENDIF
1019	IF ( do_sum ) CALL flow_statistics
1020
1021	!
1022	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
1023	IF ( averaging_interval /= 0.0_wp .AND. &
1024	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
1025	simulated_time >= skip_time_data_output_av ) &
1026	THEN
1027	time_do_sla = time_do_sla + dt_3d
1028	IF ( time_do_sla >= dt_averaging_input ) THEN
1029	CALL sum_up_3d_data
1030	average_count_3d = average_count_3d + 1
1031	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
1032	ENDIF
1033	ENDIF
1034
1035	!
1036	!-- Calculate spectra for time averaging
1037	IF ( averaging_interval_sp /= 0.0_wp .AND. &
1038	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
1039	simulated_time >= skip_time_dosp ) THEN
1040	time_dosp_av = time_dosp_av + dt_3d
1041	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
1042	CALL calc_spectra
1043	time_dosp_av = MOD( time_dosp_av, &
1044	MAX( dt_averaging_input_pr, dt_3d ) )
1045	ENDIF
1046	ENDIF
1047
1048	!
1049	!-- Call flight module and output data
1050	IF ( virtual_flight ) THEN
1051	CALL flight_measurement
1052	CALL data_output_flight
1053	ENDIF
1054
1055	!
1056	!-- Profile output (ASCII) on file
1057	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1058	CALL print_1d
1059	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1060	dt_3d ) )
1061	ENDIF
1062
1063	!
1064	!-- Graphic output for PROFIL
1065	IF ( time_dopr >= dt_dopr ) THEN
1066	IF ( dopr_n /= 0 ) CALL data_output_profiles
1067	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1068	time_dopr_av = 0.0_wp ! due to averaging (see above)
1069	ENDIF
1070
1071	!
1072	!-- Graphic output for time series
1073	IF ( time_dots >= dt_dots ) THEN
1074	CALL data_output_tseries
1075	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1076	ENDIF
1077
1078	!
1079	!-- Output of spectra (formatted for use with PROFIL), in case of no
1080	!-- time averaging, spectra has to be calculated before
1081	IF ( time_dosp >= dt_dosp ) THEN
1082	IF ( average_count_sp == 0 ) CALL calc_spectra
1083	CALL data_output_spectra
1084	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1085	ENDIF
1086
1087	!
1088	!-- 2d-data output (cross-sections)
1089	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1090	CALL data_output_2d( 'xy', 0 )
1091	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1092	ENDIF
1093	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1094	CALL data_output_2d( 'xz', 0 )
1095	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1096	ENDIF
1097	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1098	CALL data_output_2d( 'yz', 0 )
1099	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1100	ENDIF
1101
1102	!
1103	!-- 3d-data output (volume data)
1104	IF ( time_do3d >= dt_do3d ) THEN
1105	CALL data_output_3d( 0 )
1106	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1107	ENDIF
1108
1109	!
1110	!-- Masked data output
1111	DO mid = 1, masks
1112	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1113	CALL data_output_mask( 0 )
1114	time_domask(mid) = MOD( time_domask(mid), &
1115	MAX( dt_domask(mid), dt_3d ) )
1116	ENDIF
1117	ENDDO
1118
1119	!
1120	!-- Output of time-averaged 2d/3d/masked data
1121	IF ( time_do_av >= dt_data_output_av ) THEN
1122	CALL average_3d_data
1123	CALL data_output_2d( 'xy', 1 )
1124	CALL data_output_2d( 'xz', 1 )
1125	CALL data_output_2d( 'yz', 1 )
1126	CALL data_output_3d( 1 )
1127	DO mid = 1, masks
1128	CALL data_output_mask( 1 )
1129	ENDDO
1130	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1131	ENDIF
1132
1133	!
1134	!-- Output of particle time series
1135	IF ( particle_advection ) THEN
1136	IF ( time_dopts >= dt_dopts .OR. &
1137	( simulated_time >= particle_advection_start .AND. &
1138	first_call_lpm ) ) THEN
1139	CALL data_output_ptseries
1140	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1141	ENDIF
1142	ENDIF
1143
1144	!
1145	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1146	#if defined( __dvrp_graphics )
1147	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1148	#endif
1149	IF ( time_dvrp >= dt_dvrp ) THEN
1150	CALL data_output_dvrp
1151	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1152	ENDIF
1153	#if defined( __dvrp_graphics )
1154	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1155	#endif
1156
1157	!
1158	!-- If required, set the heat flux for the next time step at a random value
1159	IF ( constant_heatflux .AND. random_heatflux ) THEN
1160	IF ( surf_def_h(0)%ns >= 1 ) CALL disturb_heatflux( surf_def_h(0) )
1161	IF ( surf_lsm_h%ns >= 1 ) CALL disturb_heatflux( surf_lsm_h )
1162	IF ( surf_usm_h%ns >= 1 ) CALL disturb_heatflux( surf_usm_h )
1163	ENDIF
1164
1165	!
1166	!-- Execute user-defined actions
1167	CALL user_actions( 'after_timestep' )
1168
1169	!
1170	!-- Determine size of next time step. Save timestep dt_3d because it is
1171	!-- newly calculated in routine timestep, but required further below for
1172	!-- steering the run control output interval
1173	dt_3d_old = dt_3d
1174	CALL timestep
1175
1176	!
1177	!-- Synchronize the timestep in case of nested run.
1178	IF ( nested_run ) THEN
1179	!
1180	!-- Synchronize by unifying the time step.
1181	!-- Global minimum of all time-steps is used for all.
1182	CALL pmci_synchronize
1183	ENDIF
1184
1185	!
1186	!-- Computation and output of run control parameters.
1187	!-- This is also done whenever perturbations have been imposed
1188	IF ( time_run_control >= dt_run_control .OR. &
1189	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
1190	THEN
1191	CALL run_control
1192	IF ( time_run_control >= dt_run_control ) THEN
1193	time_run_control = MOD( time_run_control, &
1194	MAX( dt_run_control, dt_3d_old ) )
1195	ENDIF
1196	ENDIF
1197
1198	!
1199	!-- Output elapsed simulated time in form of a progress bar on stdout
1200	IF ( myid == 0 ) CALL output_progress_bar
1201
1202	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1203
1204
1205	ENDDO ! time loop
1206
1207	!-- Vertical nesting: Deallocate variables initialized for vertical nesting
1208	IF ( vnest_init ) CALL vnest_deallocate
1209
1210	IF ( myid == 0 ) CALL finish_progress_bar
1211
1212	#if defined( __dvrp_graphics )
1213	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1214	#endif
1215
1216	CALL location_message( 'finished time-stepping', .TRUE. )
1217
1218	END SUBROUTINE time_integration

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