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time_integration.f90 @ 1402

Last change on this file since 1402 was 1402, checked in by raasch, 10 years ago

output of location messages complemented, output of location bar added
(Makefile, check_parameters, cpulog, init_pegrid, init_3d_model, message, palm, parin, time_integration, new: progress_bar)
preprocessor switch intel_compiler added, -r8 compiler options removed
(.mrun.config.default, .mrun.config.imuk, .mrun.config.kiaps)

batch_job added to envpar-NAMELIST
(mrun, parin)

Property svn:keywords set to Id

File size: 37.7 KB

Line
1	SUBROUTINE time_integration
2
3	!--------------------------------------------------------------------------------!
4	! This file is part of PALM.
5	!
6	! PALM is free software: you can redistribute it and/or modify it under the terms
7	! of the GNU General Public License as published by the Free Software Foundation,
8	! either version 3 of the License, or (at your option) any later 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 1997-2014 Leibniz Universitaet Hannover
18	!--------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	! location messages modified
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: time_integration.f90 1402 2014-05-09 14:25:13Z raasch $
27	!
28	! 1384 2014-05-02 14:31:06Z raasch
29	! location messages added
30	!
31	! 1380 2014-04-28 12:40:45Z heinze
32	! CALL of nudge_ref added
33	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
34	!
35	! 1365 2014-04-22 15:03:56Z boeske
36	! Reset sums_ls_l to zero at each timestep
37	! +sums_ls_l
38	! Calculation of reference state (previously in subroutine calc_mean_profile)
39
40	! 1342 2014-03-26 17:04:47Z kanani
41	! REAL constants defined as wp-kind
42	!
43	! 1320 2014-03-20 08:40:49Z raasch
44	! ONLY-attribute added to USE-statements,
45	! kind-parameters added to all INTEGER and REAL declaration statements,
46	! kinds are defined in new module kinds,
47	! old module precision_kind is removed,
48	! revision history before 2012 removed,
49	! comment fields (!:) to be used for variable explanations added to
50	! all variable declaration statements
51	! 1318 2014-03-17 13:35:16Z raasch
52	! module interfaces removed
53	!
54	! 1308 2014-03-13 14:58:42Z fricke
55	! +netcdf_data_format_save
56	! For masked data, parallel netcdf output is not tested so far, hence
57	! netcdf_data_format is switched back to non-paralell output.
58	!
59	! 1276 2014-01-15 13:40:41Z heinze
60	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
61	!
62	! 1257 2013-11-08 15:18:40Z raasch
63	! acc-update-host directive for timestep removed
64	!
65	! 1241 2013-10-30 11:36:58Z heinze
66	! Generalize calc_mean_profile for wider use
67	! Determine shf and qsws in dependence on data from LSF_DATA
68	! Determine ug and vg in dependence on data from LSF_DATA
69	! 1221 2013-09-10 08:59:13Z raasch
70	! host update of arrays before timestep is called
71	!
72	! 1179 2013-06-14 05:57:58Z raasch
73	! mean profiles for reference state are only calculated if required,
74	! small bugfix for background communication
75	!
76	! 1171 2013-05-30 11:27:45Z raasch
77	! split of prognostic_equations deactivated (comment lines), for the time being
78	!
79	! 1128 2013-04-12 06:19:32Z raasch
80	! asynchronous transfer of ghost point data realized for acc-optimized version:
81	! prognostic_equations are first called two times for those points required for
82	! the left-right and north-south exchange, respectively, and then for the
83	! remaining points,
84	! those parts requiring global communication moved from prognostic_equations to
85	! here
86	!
87	! 1115 2013-03-26 18:16:16Z hoffmann
88	! calculation of qr and nr is restricted to precipitation
89	!
90	! 1113 2013-03-10 02:48:14Z raasch
91	! GPU-porting of boundary conditions,
92	! openACC directives updated
93	! formal parameter removed from routine boundary_conds
94	!
95	! 1111 2013-03-08 23:54:10Z raasch
96	! +internal timestep counter for cpu statistics added,
97	! openACC directives updated
98	!
99	! 1092 2013-02-02 11:24:22Z raasch
100	! unused variables removed
101	!
102	! 1065 2012-11-22 17:42:36Z hoffmann
103	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
104	!
105	! 1053 2012-11-13 17:11:03Z hoffmann
106	! exchange of ghost points for nr, qr added
107	!
108	! 1036 2012-10-22 13:43:42Z raasch
109	! code put under GPL (PALM 3.9)
110	!
111	! 1019 2012-09-28 06:46:45Z raasch
112	! non-optimized version of prognostic_equations removed
113	!
114	! 1015 2012-09-27 09:23:24Z raasch
115	! +call of prognostic_equations_acc
116	!
117	! 1001 2012-09-13 14:08:46Z raasch
118	! all actions concerning leapfrog- and upstream-spline-scheme removed
119	!
120	! 849 2012-03-15 10:35:09Z raasch
121	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
122	!
123	! 825 2012-02-19 03:03:44Z raasch
124	! wang_collision_kernel renamed wang_kernel
125	!
126	! Revision 1.1 1997/08/11 06:19:04 raasch
127	! Initial revision
128	!
129	!
130	! Description:
131	! ------------
132	! Integration in time of the model equations, statistical analysis and graphic
133	! output
134	!------------------------------------------------------------------------------!
135
136	USE advec_ws, &
137	ONLY: ws_statistics
138
139	USE arrays_3d, &
140	ONLY: diss, dzu, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, ql, &
141	ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, u, &
142	u_p, v, vpt, v_p, w_p
143
144	USE calc_mean_profile_mod, &
145	ONLY: calc_mean_profile
146
147	USE control_parameters, &
148	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
149	average_count_sp, averaging_interval, averaging_interval_pr, &
150	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
151	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
152	cloud_physics, constant_heatflux, create_disturbances, dopr_n, &
153	constant_diffusion, coupling_mode, coupling_start_time, &
154	current_timestep_number, disturbance_created, &
155	disturbance_energy_limit, dist_range, do_sum, dt_3d, &
156	dt_averaging_input, dt_averaging_input_pr, dt_coupling, &
157	dt_data_output_av, dt_disturb, dt_do2d_xy, dt_do2d_xz, &
158	dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
159	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
160	end_time, first_call_lpm, galilei_transformation, humidity, &
161	icloud_scheme, intermediate_timestep_count, &
162	intermediate_timestep_count_max, large_scale_forcing, &
163	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
164	netcdf_data_format, neutral, nr_timesteps_this_run, nudging, &
165	ocean, on_device, passive_scalar, prandtl_layer, precipitation, &
166	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
167	run_coupled, simulated_time, simulated_time_chr, &
168	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
169	skip_time_do3d, skip_time_domask, skip_time_dopr, &
170	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
171	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
172	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
173	time_do3d, time_domask, time_dopr, time_dopr_av, &
174	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
175	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
176	time_run_control, time_since_reference_point, turbulence, &
177	turbulent_inflow, use_initial_profile_as_reference, &
178	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
179	ws_scheme_sca
180
181	USE cpulog, &
182	ONLY: cpu_log, log_point, log_point_s
183
184	USE indices, &
185	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
186	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
187
188	USE interaction_droplets_ptq_mod, &
189	ONLY: interaction_droplets_ptq
190
191	USE kinds
192
193	USE ls_forcing_mod, &
194	ONLY: ls_forcing_surf, ls_forcing_vert
195
196	USE nudge_mod, &
197	ONLY: calc_tnudge, nudge_ref
198
199	USE particle_attributes, &
200	ONLY: particle_advection, particle_advection_start, wang_kernel
201
202	USE pegrid
203
204	USE production_e_mod, &
205	ONLY: production_e_init
206
207	USE progress_bar, &
208	ONLY: finish_progress_bar, output_progress_bar
209
210	USE prognostic_equations_mod, &
211	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
212	prognostic_equations_vector
213
214	USE statistics, &
215	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
216
217	USE user_actions_mod, &
218	ONLY: user_actions
219
220	IMPLICIT NONE
221
222	CHARACTER (LEN=9) :: time_to_string !:
223
224	INTEGER(iwp) :: netcdf_data_format_save !:
225
226	!
227	!-- At the beginning of a simulation determine the time step as well as
228	!-- determine and print out the run control parameters
229	IF ( simulated_time == 0.0_wp ) CALL timestep
230
231	CALL run_control
232
233
234	!
235	!-- Data exchange between coupled models in case that a call has been omitted
236	!-- at the end of the previous run of a job chain.
237	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
238	!
239	!-- In case of model termination initiated by the local model the coupler
240	!-- must not be called because this would again cause an MPI hang.
241	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
242	CALL surface_coupler
243	time_coupling = time_coupling - dt_coupling
244	ENDDO
245	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
246	THEN
247	time_coupling = time_since_reference_point
248	ENDIF
249	ENDIF
250
251
252	#if defined( __dvrp_graphics )
253	!
254	!-- Time measurement with dvrp software
255	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
256	#endif
257
258	CALL location_message( 'start with time-stepping', .TRUE. )
259	!
260	!-- Start of the time loop
261	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
262	.NOT. terminate_run )
263
264	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
265
266	!
267	!-- Determine size of next time step
268	IF ( simulated_time /= 0.0_wp ) THEN
269	CALL timestep
270	ENDIF
271
272	!
273	!-- Determine ug, vg and w_subs in dependence on data from external file
274	!-- LSF_DATA
275	IF ( large_scale_forcing .AND. lsf_vert ) THEN
276	CALL ls_forcing_vert ( simulated_time )
277	sums_ls_l = 0.0_wp
278	ENDIF
279
280	!
281	!-- Set pt_init and q_init to the current profiles taken from
282	!-- NUDGING_DATA
283	IF ( nudging ) THEN
284	CALL nudge_ref ( simulated_time )
285	!
286	!-- Store temperature gradient at the top boundary for possible Neumann
287	!-- boundary condition
288	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
289	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
290	ENDIF
291
292	!
293	!-- Execute the user-defined actions
294	CALL user_actions( 'before_timestep' )
295
296	!
297	!-- Start of intermediate step loop
298	intermediate_timestep_count = 0
299	DO WHILE ( intermediate_timestep_count < &
300	intermediate_timestep_count_max )
301
302	intermediate_timestep_count = intermediate_timestep_count + 1
303
304	!
305	!-- Set the steering factors for the prognostic equations which depend
306	!-- on the timestep scheme
307	CALL timestep_scheme_steering
308
309	!
310	!-- Calculate those variables needed in the tendency terms which need
311	!-- global communication
312	IF ( .NOT. use_single_reference_value .AND. &
313	.NOT. use_initial_profile_as_reference ) THEN
314	!
315	!-- Horizontally averaged profiles to be used as reference state in
316	!-- buoyancy terms (WARNING: only the respective last call of
317	!-- calc_mean_profile defines the reference state!)
318	IF ( .NOT. neutral ) THEN
319	CALL calc_mean_profile( pt, 4 )
320	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
321	ENDIF
322	IF ( ocean ) THEN
323	CALL calc_mean_profile( rho, 64 )
324	ref_state(:) = hom(:,1,64,0)
325	ENDIF
326	IF ( humidity ) THEN
327	CALL calc_mean_profile( vpt, 44 )
328	ref_state(:) = hom(:,1,44,0)
329	ENDIF
330
331	ENDIF
332
333	IF ( .NOT. constant_diffusion ) CALL production_e_init
334	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
335	intermediate_timestep_count == 1 ) CALL ws_statistics
336	!
337	!-- In case of nudging calculate current nudging time scale and horizontal
338	!-- means of u, v, pt and q
339	IF ( nudging ) THEN
340	CALL calc_tnudge( simulated_time )
341	CALL calc_mean_profile( u, 1 )
342	CALL calc_mean_profile( v, 2 )
343	CALL calc_mean_profile( pt, 4 )
344	CALL calc_mean_profile( q, 41 )
345	ENDIF
346
347	!
348	!-- Solve the prognostic equations. A fast cache optimized version with
349	!-- only one single loop is used in case of Piascek-Williams advection
350	!-- scheme. NEC vector machines use a different version, because
351	!-- in the other versions a good vectorization is prohibited due to
352	!-- inlining problems.
353	IF ( loop_optimization == 'cache' ) THEN
354	CALL prognostic_equations_cache
355	ELSEIF ( loop_optimization == 'vector' ) THEN
356	CALL prognostic_equations_vector
357	ELSEIF ( loop_optimization == 'acc' ) THEN
358	i_left = nxl; i_right = nxr
359	j_south = nys; j_north = nyn
360	CALL prognostic_equations_acc
361
362	! i_left = nxl; i_right = nxl+nbgp-1
363	! j_south = nys; j_north = nyn
364	! CALL prognostic_equations_acc
365	! i_left = nxr-nbgp+1; i_right = nxr
366	! j_south = nys; j_north = nyn
367	! CALL prognostic_equations_acc
368
369	!
370	!-- Exchange of ghost points (lateral boundary conditions)
371	IF ( background_communication ) THEN
372
373	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
374
375	send_receive = 'lr'
376	sendrecv_in_background = .TRUE.
377	req = 0
378	req_count = 0
379
380	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
381	on_device = .TRUE. ! to be removed after complete porting
382	ELSE ! of ghost point exchange
383	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
384	ENDIF
385
386	CALL exchange_horiz( u_p, nbgp )
387	CALL exchange_horiz( v_p, nbgp )
388	CALL exchange_horiz( w_p, nbgp )
389	CALL exchange_horiz( pt_p, nbgp )
390	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
391	IF ( ocean ) THEN
392	CALL exchange_horiz( sa_p, nbgp )
393	CALL exchange_horiz( rho, nbgp )
394	CALL exchange_horiz( prho, nbgp )
395	ENDIF
396	IF (humidity .OR. passive_scalar) THEN
397	CALL exchange_horiz( q_p, nbgp )
398	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
399	CALL exchange_horiz( qr_p, nbgp )
400	CALL exchange_horiz( nr_p, nbgp )
401	ENDIF
402	ENDIF
403	IF ( cloud_droplets ) THEN
404	CALL exchange_horiz( ql, nbgp )
405	CALL exchange_horiz( ql_c, nbgp )
406	CALL exchange_horiz( ql_v, nbgp )
407	CALL exchange_horiz( ql_vp, nbgp )
408	ENDIF
409	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
410
411	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
412	on_device = .FALSE. ! to be removed after complete porting
413	ELSE ! of ghost point exchange
414	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
415	ENDIF
416
417	sendrecv_in_background = .FALSE.
418
419	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
420
421	ENDIF
422
423	! i_left = nxl+nbgp; i_right = nxr-nbgp
424	! j_south = nys; j_north = nys+nbgp-1
425	! CALL prognostic_equations_acc
426	! i_left = nxl+nbgp; i_right = nxr-nbgp
427	! j_south = nyn-nbgp+1; j_north = nyn
428	! CALL prognostic_equations_acc
429
430	IF ( background_communication ) THEN
431	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
432	#if defined( __parallel )
433	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
434	#endif
435	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
436
437	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
438
439	send_receive = 'ns'
440	sendrecv_in_background = .TRUE.
441	req = 0
442	req_count = 0
443
444	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
445	on_device = .TRUE. ! to be removed after complete porting
446	ELSE ! of ghost point exchange
447	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
448	ENDIF
449
450	CALL exchange_horiz( u_p, nbgp )
451	CALL exchange_horiz( v_p, nbgp )
452	CALL exchange_horiz( w_p, nbgp )
453	CALL exchange_horiz( pt_p, nbgp )
454	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
455	IF ( ocean ) THEN
456	CALL exchange_horiz( sa_p, nbgp )
457	CALL exchange_horiz( rho, nbgp )
458	CALL exchange_horiz( prho, nbgp )
459	ENDIF
460	IF (humidity .OR. passive_scalar) THEN
461	CALL exchange_horiz( q_p, nbgp )
462	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
463	CALL exchange_horiz( qr_p, nbgp )
464	CALL exchange_horiz( nr_p, nbgp )
465	ENDIF
466	ENDIF
467	IF ( cloud_droplets ) THEN
468	CALL exchange_horiz( ql, nbgp )
469	CALL exchange_horiz( ql_c, nbgp )
470	CALL exchange_horiz( ql_v, nbgp )
471	CALL exchange_horiz( ql_vp, nbgp )
472	ENDIF
473	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
474
475	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
476	on_device = .FALSE. ! to be removed after complete porting
477	ELSE ! of ghost point exchange
478	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
479	ENDIF
480
481	sendrecv_in_background = .FALSE.
482
483	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
484
485	ENDIF
486
487	! i_left = nxl+nbgp; i_right = nxr-nbgp
488	! j_south = nys+nbgp; j_north = nyn-nbgp
489	! CALL prognostic_equations_acc
490
491	IF ( background_communication ) THEN
492	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
493	#if defined( __parallel )
494	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
495	#endif
496	send_receive = 'al'
497	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
498	ENDIF
499
500	ENDIF
501
502	!
503	!-- Particle transport/physics with the Lagrangian particle model
504	!-- (only once during intermediate steps, because it uses an Euler-step)
505	!-- ### particle model should be moved before prognostic_equations, in order
506	!-- to regard droplet interactions directly
507	IF ( particle_advection .AND. &
508	simulated_time >= particle_advection_start .AND. &
509	intermediate_timestep_count == 1 ) THEN
510	CALL lpm
511	first_call_lpm = .FALSE.
512	ENDIF
513
514	!
515	!-- Interaction of droplets with temperature and specific humidity.
516	!-- Droplet condensation and evaporation is calculated within
517	!-- advec_particles.
518	IF ( cloud_droplets .AND. &
519	intermediate_timestep_count == intermediate_timestep_count_max )&
520	THEN
521	CALL interaction_droplets_ptq
522	ENDIF
523
524	!
525	!-- Exchange of ghost points (lateral boundary conditions)
526	IF ( .NOT. background_communication ) THEN
527
528	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
529
530	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
531	on_device = .TRUE. ! to be removed after complete porting
532	ELSE ! of ghost point exchange
533	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
534	ENDIF
535
536	CALL exchange_horiz( u_p, nbgp )
537	CALL exchange_horiz( v_p, nbgp )
538	CALL exchange_horiz( w_p, nbgp )
539	CALL exchange_horiz( pt_p, nbgp )
540	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
541	IF ( ocean ) THEN
542	CALL exchange_horiz( sa_p, nbgp )
543	CALL exchange_horiz( rho, nbgp )
544	CALL exchange_horiz( prho, nbgp )
545	ENDIF
546	IF (humidity .OR. passive_scalar) THEN
547	CALL exchange_horiz( q_p, nbgp )
548	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
549	precipitation ) THEN
550	CALL exchange_horiz( qr_p, nbgp )
551	CALL exchange_horiz( nr_p, nbgp )
552	ENDIF
553	ENDIF
554	IF ( cloud_droplets ) THEN
555	CALL exchange_horiz( ql, nbgp )
556	CALL exchange_horiz( ql_c, nbgp )
557	CALL exchange_horiz( ql_v, nbgp )
558	CALL exchange_horiz( ql_vp, nbgp )
559	ENDIF
560	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
561
562	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
563	on_device = .FALSE. ! to be removed after complete porting
564	ELSE ! of ghost point exchange
565	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
566	ENDIF
567
568	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
569
570	ENDIF
571
572	!
573	!-- Boundary conditions for the prognostic quantities (except of the
574	!-- velocities at the outflow in case of a non-cyclic lateral wall)
575	CALL boundary_conds
576
577	!
578	!-- Swap the time levels in preparation for the next time step.
579	CALL swap_timelevel
580
581	!
582	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
583	!-- when a sloping surface is used
584	IF ( sloping_surface ) THEN
585	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
586	pt_slope_offset
587	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
588	pt_slope_offset
589	ENDIF
590
591	!
592	!-- Impose a turbulent inflow using the recycling method
593	IF ( turbulent_inflow ) CALL inflow_turbulence
594
595	!
596	!-- Impose a random perturbation on the horizontal velocity field
597	IF ( create_disturbances .AND. &
598	( call_psolver_at_all_substeps .AND. &
599	intermediate_timestep_count == intermediate_timestep_count_max )&
600	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
601	intermediate_timestep_count == 1 ) ) &
602	THEN
603	time_disturb = time_disturb + dt_3d
604	IF ( time_disturb >= dt_disturb ) THEN
605	!$acc update host( u, v )
606	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
607	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
608	CALL disturb_field( nzb_u_inner, tend, u )
609	CALL disturb_field( nzb_v_inner, tend, v )
610	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
611	!
612	!-- Runs with a non-cyclic lateral wall need perturbations
613	!-- near the inflow throughout the whole simulation
614	dist_range = 1
615	CALL disturb_field( nzb_u_inner, tend, u )
616	CALL disturb_field( nzb_v_inner, tend, v )
617	dist_range = 0
618	ENDIF
619	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
620	!$acc update device( u, v )
621	time_disturb = time_disturb - dt_disturb
622	ENDIF
623	ENDIF
624
625	!
626	!-- Reduce the velocity divergence via the equation for perturbation
627	!-- pressure.
628	IF ( intermediate_timestep_count == 1 .OR. &
629	call_psolver_at_all_substeps ) THEN
630	CALL pres
631	ENDIF
632
633	!
634	!-- If required, compute liquid water content
635	IF ( cloud_physics ) THEN
636	CALL calc_liquid_water_content
637	!$acc update device( ql )
638	ENDIF
639	!
640	!-- If required, compute virtual potential temperature
641	IF ( humidity ) THEN
642	CALL compute_vpt
643	!$acc update device( vpt )
644	ENDIF
645	!
646	!-- Compute the diffusion quantities
647	IF ( .NOT. constant_diffusion ) THEN
648
649	!
650	!-- Determine surface fluxes shf and qsws and surface values
651	!-- pt_surface and q_surface in dependence on data from external
652	!-- file LSF_DATA respectively
653	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
654	intermediate_timestep_count == intermediate_timestep_count_max )&
655	THEN
656	CALL ls_forcing_surf ( simulated_time )
657	ENDIF
658
659	!
660	!-- First the vertical fluxes in the Prandtl layer are being computed
661	IF ( prandtl_layer ) THEN
662	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
663	CALL prandtl_fluxes
664	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
665	ENDIF
666
667	!
668	!-- Compute the diffusion coefficients
669	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
670	IF ( .NOT. humidity ) THEN
671	IF ( ocean ) THEN
672	CALL diffusivities( prho, prho_reference )
673	ELSE
674	CALL diffusivities( pt, pt_reference )
675	ENDIF
676	ELSE
677	CALL diffusivities( vpt, pt_reference )
678	ENDIF
679	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
680
681	ENDIF
682
683	ENDDO ! Intermediate step loop
684
685	!
686	!-- Increase simulation time and output times
687	nr_timesteps_this_run = nr_timesteps_this_run + 1
688	current_timestep_number = current_timestep_number + 1
689	simulated_time = simulated_time + dt_3d
690	simulated_time_chr = time_to_string( simulated_time )
691	time_since_reference_point = simulated_time - coupling_start_time
692
693	IF ( simulated_time >= skip_time_data_output_av ) THEN
694	time_do_av = time_do_av + dt_3d
695	ENDIF
696	IF ( simulated_time >= skip_time_do2d_xy ) THEN
697	time_do2d_xy = time_do2d_xy + dt_3d
698	ENDIF
699	IF ( simulated_time >= skip_time_do2d_xz ) THEN
700	time_do2d_xz = time_do2d_xz + dt_3d
701	ENDIF
702	IF ( simulated_time >= skip_time_do2d_yz ) THEN
703	time_do2d_yz = time_do2d_yz + dt_3d
704	ENDIF
705	IF ( simulated_time >= skip_time_do3d ) THEN
706	time_do3d = time_do3d + dt_3d
707	ENDIF
708	DO mid = 1, masks
709	IF ( simulated_time >= skip_time_domask(mid) ) THEN
710	time_domask(mid)= time_domask(mid) + dt_3d
711	ENDIF
712	ENDDO
713	time_dvrp = time_dvrp + dt_3d
714	IF ( simulated_time >= skip_time_dosp ) THEN
715	time_dosp = time_dosp + dt_3d
716	ENDIF
717	time_dots = time_dots + dt_3d
718	IF ( .NOT. first_call_lpm ) THEN
719	time_dopts = time_dopts + dt_3d
720	ENDIF
721	IF ( simulated_time >= skip_time_dopr ) THEN
722	time_dopr = time_dopr + dt_3d
723	ENDIF
724	time_dopr_listing = time_dopr_listing + dt_3d
725	time_run_control = time_run_control + dt_3d
726
727	!
728	!-- Data exchange between coupled models
729	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
730	time_coupling = time_coupling + dt_3d
731
732	!
733	!-- In case of model termination initiated by the local model
734	!-- (terminate_coupled > 0), the coupler must be skipped because it would
735	!-- cause an MPI intercomminucation hang.
736	!-- If necessary, the coupler will be called at the beginning of the
737	!-- next restart run.
738	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
739	CALL surface_coupler
740	time_coupling = time_coupling - dt_coupling
741	ENDDO
742	ENDIF
743
744	!
745	!-- Execute user-defined actions
746	CALL user_actions( 'after_integration' )
747
748	!
749	!-- If Galilei transformation is used, determine the distance that the
750	!-- model has moved so far
751	IF ( galilei_transformation ) THEN
752	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
753	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
754	ENDIF
755
756	!
757	!-- Check, if restart is necessary (because cpu-time is expiring or
758	!-- because it is forced by user) and set stop flag
759	!-- This call is skipped if the remote model has already initiated a restart.
760	IF ( .NOT. terminate_run ) CALL check_for_restart
761
762	!
763	!-- Carry out statistical analysis and output at the requested output times.
764	!-- The MOD function is used for calculating the output time counters (like
765	!-- time_dopr) in order to regard a possible decrease of the output time
766	!-- interval in case of restart runs
767
768	!
769	!-- Set a flag indicating that so far no statistics have been created
770	!-- for this time step
771	flow_statistics_called = .FALSE.
772
773	!
774	!-- If required, call flow_statistics for averaging in time
775	IF ( averaging_interval_pr /= 0.0_wp .AND. &
776	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
777	simulated_time >= skip_time_dopr ) THEN
778	time_dopr_av = time_dopr_av + dt_3d
779	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
780	do_sum = .TRUE.
781	time_dopr_av = MOD( time_dopr_av, &
782	MAX( dt_averaging_input_pr, dt_3d ) )
783	ENDIF
784	ENDIF
785	IF ( do_sum ) CALL flow_statistics
786
787	!
788	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
789	IF ( averaging_interval /= 0.0_wp .AND. &
790	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
791	simulated_time >= skip_time_data_output_av ) &
792	THEN
793	time_do_sla = time_do_sla + dt_3d
794	IF ( time_do_sla >= dt_averaging_input ) THEN
795	CALL sum_up_3d_data
796	average_count_3d = average_count_3d + 1
797	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
798	ENDIF
799	ENDIF
800
801	!
802	!-- Calculate spectra for time averaging
803	IF ( averaging_interval_sp /= 0.0_wp .AND. &
804	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
805	simulated_time >= skip_time_dosp ) THEN
806	time_dosp_av = time_dosp_av + dt_3d
807	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
808	CALL calc_spectra
809	time_dosp_av = MOD( time_dosp_av, &
810	MAX( dt_averaging_input_pr, dt_3d ) )
811	ENDIF
812	ENDIF
813
814	!
815	!-- Computation and output of run control parameters.
816	!-- This is also done whenever perturbations have been imposed
817	IF ( time_run_control >= dt_run_control .OR. &
818	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
819	THEN
820	CALL run_control
821	IF ( time_run_control >= dt_run_control ) THEN
822	time_run_control = MOD( time_run_control, &
823	MAX( dt_run_control, dt_3d ) )
824	ENDIF
825	ENDIF
826
827	!
828	!-- Profile output (ASCII) on file
829	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
830	CALL print_1d
831	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
832	dt_3d ) )
833	ENDIF
834
835	!
836	!-- Graphic output for PROFIL
837	IF ( time_dopr >= dt_dopr ) THEN
838	IF ( dopr_n /= 0 ) CALL data_output_profiles
839	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
840	time_dopr_av = 0.0_wp ! due to averaging (see above)
841	ENDIF
842
843	!
844	!-- Graphic output for time series
845	IF ( time_dots >= dt_dots ) THEN
846	CALL data_output_tseries
847	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
848	ENDIF
849
850	!
851	!-- Output of spectra (formatted for use with PROFIL), in case of no
852	!-- time averaging, spectra has to be calculated before
853	IF ( time_dosp >= dt_dosp ) THEN
854	IF ( average_count_sp == 0 ) CALL calc_spectra
855	CALL data_output_spectra
856	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
857	ENDIF
858
859	!
860	!-- 2d-data output (cross-sections)
861	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
862	CALL data_output_2d( 'xy', 0 )
863	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
864	ENDIF
865	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
866	CALL data_output_2d( 'xz', 0 )
867	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
868	ENDIF
869	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
870	CALL data_output_2d( 'yz', 0 )
871	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
872	ENDIF
873
874	!
875	!-- 3d-data output (volume data)
876	IF ( time_do3d >= dt_do3d ) THEN
877	CALL data_output_3d( 0 )
878	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
879	ENDIF
880
881	!
882	!-- masked data output
883	!-- Parallel netcdf output is not tested so far for masked data, hence
884	!-- netcdf_data_format is switched back to non-paralell output.
885	netcdf_data_format_save = netcdf_data_format
886	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
887	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
888	DO mid = 1, masks
889	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
890	CALL data_output_mask( 0 )
891	time_domask(mid) = MOD( time_domask(mid), &
892	MAX( dt_domask(mid), dt_3d ) )
893	ENDIF
894	ENDDO
895	netcdf_data_format = netcdf_data_format_save
896
897	!
898	!-- Output of time-averaged 2d/3d/masked data
899	IF ( time_do_av >= dt_data_output_av ) THEN
900	CALL average_3d_data
901	CALL data_output_2d( 'xy', 1 )
902	CALL data_output_2d( 'xz', 1 )
903	CALL data_output_2d( 'yz', 1 )
904	CALL data_output_3d( 1 )
905	!-- Parallel netcdf output is not tested so far for masked data, hence
906	!-- netcdf_data_format is switched back to non-paralell output.
907	netcdf_data_format_save = netcdf_data_format
908	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
909	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
910	DO mid = 1, masks
911	CALL data_output_mask( 1 )
912	ENDDO
913	netcdf_data_format = netcdf_data_format_save
914	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
915	ENDIF
916
917	!
918	!-- Output of particle time series
919	IF ( particle_advection ) THEN
920	IF ( time_dopts >= dt_dopts .OR. &
921	( simulated_time >= particle_advection_start .AND. &
922	first_call_lpm ) ) THEN
923	CALL data_output_ptseries
924	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
925	ENDIF
926	ENDIF
927
928	!
929	!-- Output of dvrp-graphics (isosurface, particles, slicer)
930	#if defined( __dvrp_graphics )
931	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
932	#endif
933	IF ( time_dvrp >= dt_dvrp ) THEN
934	CALL data_output_dvrp
935	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
936	ENDIF
937	#if defined( __dvrp_graphics )
938	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
939	#endif
940
941	!
942	!-- If required, set the heat flux for the next time step at a random value
943	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
944
945	!
946	!-- Execute user-defined actions
947	CALL user_actions( 'after_timestep' )
948
949	!
950	!-- Output elapsed simulated time in form of a progress bar on stdout
951	IF ( myid == 0 ) CALL output_progress_bar
952
953	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
954
955
956	ENDDO ! time loop
957
958	IF ( myid == 0 ) CALL finish_progress_bar
959
960	#if defined( __dvrp_graphics )
961	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
962	#endif
963
964	CALL location_message( 'finished time-stepping', .TRUE. )
965
966	END SUBROUTINE time_integration

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