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source: palm/trunk/SOURCE/time_integration.f90 @ 1781

Last change on this file since 1781 was 1781, checked in by raasch, 8 years ago
some pmc calls completely removed, some moved from time_integration to main program, t_..m arrays removed from pmc
Property svn:keywords set to `Id`
File size: 44.0 KB

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

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