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source: palm/trunk/SOURCE/time_integration.f90 @ 1850

Last change on this file since 1850 was 1849, checked in by hoffmann, 9 years ago
lpm_droplet_condensation improved, microphysics partially modularized
Property svn:keywords set to `Id`
File size: 43.8 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 1997-2016 Leibniz Universitaet Hannover
17	!--------------------------------------------------------------------------------!
18	!
19	! Current revisions:
20	! ------------------
21	! Adapted for modularization of microphysics
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: time_integration.f90 1849 2016-04-08 11:33:18Z maronga $
26	!
27	! 1833 2016-04-07 14:23:03Z raasch
28	! spectrum renamed spectra_mod, spectra related variables moved to spectra_mod
29	!
30	! 1831 2016-04-07 13:15:51Z hoffmann
31	! turbulence renamed collision_turbulence
32	!
33	! 1822 2016-04-07 07:49:42Z hoffmann
34	! icloud_scheme replaced by microphysics_*
35	!
36	! 1808 2016-04-05 19:44:00Z raasch
37	! output message in case unscheduled radiation calls removed
38	!
39	! 1797 2016-03-21 16:50:28Z raasch
40	! introduction of different datatransfer modes
41	!
42	! 1791 2016-03-11 10:41:25Z raasch
43	! call of pmci_update_new removed
44	!
45	! 1786 2016-03-08 05:49:27Z raasch
46	! +module spectrum
47	!
48	! 1783 2016-03-06 18:36:17Z raasch
49	! switch back of netcdf data format for mask output moved to the mask output
50	! routine
51	!
52	! 1781 2016-03-03 15:12:23Z raasch
53	! some pmc calls removed at the beginning (before timeloop),
54	! pmc initialization moved to the main program
55	!
56	! 1764 2016-02-28 12:45:19Z raasch
57	! PMC_ACTIVE flags removed,
58	! bugfix: nest synchronization after first call of timestep
59	!
60	! 1762 2016-02-25 12:31:13Z hellstea
61	! Introduction of nested domain feature
62	!
63	! 1736 2015-12-04 08:56:33Z raasch
64	! no perturbations added to total domain if energy limit has been set zero
65	!
66	! 1691 2015-10-26 16:17:44Z maronga
67	! Added option for spin-ups without land surface and radiation models. Moved calls
68	! for radiation and lan surface schemes.
69	!
70	! 1682 2015-10-07 23:56:08Z knoop
71	! Code annotations made doxygen readable
72	!
73	! 1671 2015-09-25 03:29:37Z raasch
74	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
75	! for particles
76	!
77	! 1585 2015-04-30 07:05:52Z maronga
78	! Moved call of radiation scheme. Added support for RRTM
79	!
80	! 1551 2015-03-03 14:18:16Z maronga
81	! Added interface for different radiation schemes.
82	!
83	! 1496 2014-12-02 17:25:50Z maronga
84	! Added calls for the land surface model and radiation scheme
85	!
86	! 1402 2014-05-09 14:25:13Z raasch
87	! location messages modified
88	!
89	! 1384 2014-05-02 14:31:06Z raasch
90	! location messages added
91	!
92	! 1380 2014-04-28 12:40:45Z heinze
93	! CALL of nudge_ref added
94	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
95	!
96	! 1365 2014-04-22 15:03:56Z boeske
97	! Reset sums_ls_l to zero at each timestep
98	! +sums_ls_l
99	! Calculation of reference state (previously in subroutine calc_mean_profile)
100
101	! 1342 2014-03-26 17:04:47Z kanani
102	! REAL constants defined as wp-kind
103	!
104	! 1320 2014-03-20 08:40:49Z raasch
105	! ONLY-attribute added to USE-statements,
106	! kind-parameters added to all INTEGER and REAL declaration statements,
107	! kinds are defined in new module kinds,
108	! old module precision_kind is removed,
109	! revision history before 2012 removed,
110	! comment fields (!:) to be used for variable explanations added to
111	! all variable declaration statements
112	! 1318 2014-03-17 13:35:16Z raasch
113	! module interfaces removed
114	!
115	! 1308 2014-03-13 14:58:42Z fricke
116	! +netcdf_data_format_save
117	! For masked data, parallel netcdf output is not tested so far, hence
118	! netcdf_data_format is switched back to non-paralell output.
119	!
120	! 1276 2014-01-15 13:40:41Z heinze
121	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
122	!
123	! 1257 2013-11-08 15:18:40Z raasch
124	! acc-update-host directive for timestep removed
125	!
126	! 1241 2013-10-30 11:36:58Z heinze
127	! Generalize calc_mean_profile for wider use
128	! Determine shf and qsws in dependence on data from LSF_DATA
129	! Determine ug and vg in dependence on data from LSF_DATA
130	! 1221 2013-09-10 08:59:13Z raasch
131	! host update of arrays before timestep is called
132	!
133	! 1179 2013-06-14 05:57:58Z raasch
134	! mean profiles for reference state are only calculated if required,
135	! small bugfix for background communication
136	!
137	! 1171 2013-05-30 11:27:45Z raasch
138	! split of prognostic_equations deactivated (comment lines), for the time being
139	!
140	! 1128 2013-04-12 06:19:32Z raasch
141	! asynchronous transfer of ghost point data realized for acc-optimized version:
142	! prognostic_equations are first called two times for those points required for
143	! the left-right and north-south exchange, respectively, and then for the
144	! remaining points,
145	! those parts requiring global communication moved from prognostic_equations to
146	! here
147	!
148	! 1115 2013-03-26 18:16:16Z hoffmann
149	! calculation of qr and nr is restricted to precipitation
150	!
151	! 1113 2013-03-10 02:48:14Z raasch
152	! GPU-porting of boundary conditions,
153	! openACC directives updated
154	! formal parameter removed from routine boundary_conds
155	!
156	! 1111 2013-03-08 23:54:10Z raasch
157	! +internal timestep counter for cpu statistics added,
158	! openACC directives updated
159	!
160	! 1092 2013-02-02 11:24:22Z raasch
161	! unused variables removed
162	!
163	! 1065 2012-11-22 17:42:36Z hoffmann
164	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
165	!
166	! 1053 2012-11-13 17:11:03Z hoffmann
167	! exchange of ghost points for nr, qr added
168	!
169	! 1036 2012-10-22 13:43:42Z raasch
170	! code put under GPL (PALM 3.9)
171	!
172	! 1019 2012-09-28 06:46:45Z raasch
173	! non-optimized version of prognostic_equations removed
174	!
175	! 1015 2012-09-27 09:23:24Z raasch
176	! +call of prognostic_equations_acc
177	!
178	! 1001 2012-09-13 14:08:46Z raasch
179	! all actions concerning leapfrog- and upstream-spline-scheme removed
180	!
181	! 849 2012-03-15 10:35:09Z raasch
182	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
183	!
184	! 825 2012-02-19 03:03:44Z raasch
185	! wang_collision_kernel renamed wang_kernel
186	!
187	! Revision 1.1 1997/08/11 06:19:04 raasch
188	! Initial revision
189	!
190	!
191	! Description:
192	! ------------
193	!> Integration in time of the model equations, statistical analysis and graphic
194	!> output
195	!------------------------------------------------------------------------------!
196	SUBROUTINE time_integration
197
198
199	USE advec_ws, &
200	ONLY: ws_statistics
201
202	USE arrays_3d, &
203	ONLY: diss, dzu, e, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, &
204	ql, ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, &
205	u, u_p, v, vpt, v_p, w, w_p
206
207	USE calc_mean_profile_mod, &
208	ONLY: calc_mean_profile
209
210	USE control_parameters, &
211	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
212	averaging_interval, averaging_interval_pr, &
213	bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
214	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
215	cloud_physics, constant_flux_layer, constant_heatflux, &
216	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
217	coupling_start_time, current_timestep_number, &
218	disturbance_created, disturbance_energy_limit, dist_range, &
219	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
220	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
221	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
222	dt_dopr_listing, dt_dots, dt_dvrp, dt_run_control, &
223	end_time, first_call_lpm, galilei_transformation, humidity, &
224	intermediate_timestep_count, &
225	intermediate_timestep_count_max, large_scale_forcing, &
226	loop_optimization, lsf_surf, lsf_vert, masks, &
227	microphysics_seifert, mid, nest_domain, &
228	neutral, nr_timesteps_this_run, nudging, &
229	ocean, on_device, passive_scalar, &
230	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
231	run_coupled, simulated_time, simulated_time_chr, &
232	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
233	skip_time_do3d, skip_time_domask, skip_time_dopr, &
234	skip_time_data_output_av, sloping_surface, &
235	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
236	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
237	time_do3d, time_domask, time_dopr, time_dopr_av, &
238	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
239	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
240	time_run_control, time_since_reference_point, &
241	turbulent_inflow, use_initial_profile_as_reference, &
242	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
243	ws_scheme_sca
244
245	USE cpulog, &
246	ONLY: cpu_log, log_point, log_point_s
247
248	USE indices, &
249	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
250	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
251
252	USE interaction_droplets_ptq_mod, &
253	ONLY: interaction_droplets_ptq
254
255	USE kinds
256
257	USE land_surface_model_mod, &
258	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
259	skip_time_do_lsm
260
261	USE ls_forcing_mod, &
262	ONLY: ls_forcing_surf, ls_forcing_vert
263
264	USE microphysics_mod, &
265	ONLY: collision_turbulence
266
267	USE nudge_mod, &
268	ONLY: calc_tnudge, nudge_ref
269
270	USE particle_attributes, &
271	ONLY: particle_advection, particle_advection_start, &
272	use_sgs_for_particles, wang_kernel
273
274	USE pegrid
275
276	USE pmc_interface, &
277	ONLY: client_to_server, nested_run, nesting_mode, &
278	pmci_client_synchronize, pmci_datatrans, &
279	pmci_ensure_nest_mass_conservation, &
280	pmci_server_synchronize, server_to_client
281
282	USE production_e_mod, &
283	ONLY: production_e_init
284
285	USE progress_bar, &
286	ONLY: finish_progress_bar, output_progress_bar
287
288	USE prognostic_equations_mod, &
289	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
290	prognostic_equations_vector
291
292	USE radiation_model_mod, &
293	ONLY: dt_radiation, force_radiation_call, radiation, &
294	radiation_clearsky, radiation_rrtmg, radiation_scheme, &
295	skip_time_do_radiation, time_radiation
296
297	USE spectra_mod, &
298	ONLY: average_count_sp, averaging_interval_sp, calc_spectra, dt_dosp, &
299	skip_time_dosp
300
301	USE statistics, &
302	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
303
304	USE surface_layer_fluxes_mod, &
305	ONLY: surface_layer_fluxes
306
307	USE user_actions_mod, &
308	ONLY: user_actions
309
310	IMPLICIT NONE
311
312	CHARACTER (LEN=9) :: time_to_string !<
313
314	!
315	!-- At the beginning of a simulation determine the time step as well as
316	!-- determine and print out the run control parameters
317	IF ( simulated_time == 0.0_wp ) CALL timestep
318
319	!
320	!-- Synchronize the timestep in case of nested run.
321	!-- The server side must be called first
322	IF ( nested_run ) THEN
323	CALL pmci_server_synchronize
324	CALL pmci_client_synchronize
325	ENDIF
326
327	CALL run_control
328
329	!
330	!-- Data exchange between coupled models in case that a call has been omitted
331	!-- at the end of the previous run of a job chain.
332	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
333	!
334	!-- In case of model termination initiated by the local model the coupler
335	!-- must not be called because this would again cause an MPI hang.
336	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
337	CALL surface_coupler
338	time_coupling = time_coupling - dt_coupling
339	ENDDO
340	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
341	THEN
342	time_coupling = time_since_reference_point
343	ENDIF
344	ENDIF
345
346	#if defined( __dvrp_graphics )
347	!
348	!-- Time measurement with dvrp software
349	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
350	#endif
351
352	CALL location_message( 'start with time-stepping', .TRUE. )
353	!
354	!-- Start of the time loop
355	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
356	.NOT. terminate_run )
357
358	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
359
360	!
361	!-- Determine size of next time step
362	IF ( simulated_time /= 0.0_wp ) THEN
363	CALL timestep
364
365	IF ( nested_run ) THEN
366	!
367	!-- TO_DO: try to give more detailed and meaningful comments here
368	!-- Server side must be called first
369	CALL pmci_server_synchronize
370	CALL pmci_client_synchronize
371	ENDIF
372	ENDIF
373
374
375	!
376	!-- Determine ug, vg and w_subs in dependence on data from external file
377	!-- LSF_DATA
378	IF ( large_scale_forcing .AND. lsf_vert ) THEN
379	CALL ls_forcing_vert ( simulated_time )
380	sums_ls_l = 0.0_wp
381	ENDIF
382
383	!
384	!-- Set pt_init and q_init to the current profiles taken from
385	!-- NUDGING_DATA
386	IF ( nudging ) THEN
387	CALL nudge_ref ( simulated_time )
388	!
389	!-- Store temperature gradient at the top boundary for possible Neumann
390	!-- boundary condition
391	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
392	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
393	ENDIF
394
395	!
396	!-- Execute the user-defined actions
397	CALL user_actions( 'before_timestep' )
398
399	!
400	!-- Start of intermediate step loop
401	intermediate_timestep_count = 0
402	DO WHILE ( intermediate_timestep_count < &
403	intermediate_timestep_count_max )
404
405	intermediate_timestep_count = intermediate_timestep_count + 1
406
407	!
408	!-- Set the steering factors for the prognostic equations which depend
409	!-- on the timestep scheme
410	CALL timestep_scheme_steering
411
412	!
413	!-- Calculate those variables needed in the tendency terms which need
414	!-- global communication
415	IF ( .NOT. use_single_reference_value .AND. &
416	.NOT. use_initial_profile_as_reference ) THEN
417	!
418	!-- Horizontally averaged profiles to be used as reference state in
419	!-- buoyancy terms (WARNING: only the respective last call of
420	!-- calc_mean_profile defines the reference state!)
421	IF ( .NOT. neutral ) THEN
422	CALL calc_mean_profile( pt, 4 )
423	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
424	ENDIF
425	IF ( ocean ) THEN
426	CALL calc_mean_profile( rho, 64 )
427	ref_state(:) = hom(:,1,64,0)
428	ENDIF
429	IF ( humidity ) THEN
430	CALL calc_mean_profile( vpt, 44 )
431	ref_state(:) = hom(:,1,44,0)
432	ENDIF
433
434	ENDIF
435
436	IF ( .NOT. constant_diffusion ) CALL production_e_init
437	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
438	intermediate_timestep_count == 1 ) CALL ws_statistics
439	!
440	!-- In case of nudging calculate current nudging time scale and horizontal
441	!-- means of u, v, pt and q
442	IF ( nudging ) THEN
443	CALL calc_tnudge( simulated_time )
444	CALL calc_mean_profile( u, 1 )
445	CALL calc_mean_profile( v, 2 )
446	CALL calc_mean_profile( pt, 4 )
447	CALL calc_mean_profile( q, 41 )
448	ENDIF
449
450	!
451	!-- Solve the prognostic equations. A fast cache optimized version with
452	!-- only one single loop is used in case of Piascek-Williams advection
453	!-- scheme. NEC vector machines use a different version, because
454	!-- in the other versions a good vectorization is prohibited due to
455	!-- inlining problems.
456	IF ( loop_optimization == 'cache' ) THEN
457	CALL prognostic_equations_cache
458	ELSEIF ( loop_optimization == 'vector' ) THEN
459	CALL prognostic_equations_vector
460	ELSEIF ( loop_optimization == 'acc' ) THEN
461	i_left = nxl; i_right = nxr
462	j_south = nys; j_north = nyn
463	CALL prognostic_equations_acc
464
465	! i_left = nxl; i_right = nxl+nbgp-1
466	! j_south = nys; j_north = nyn
467	! CALL prognostic_equations_acc
468	! i_left = nxr-nbgp+1; i_right = nxr
469	! j_south = nys; j_north = nyn
470	! CALL prognostic_equations_acc
471
472	!
473	!-- Exchange of ghost points (lateral boundary conditions)
474	IF ( background_communication ) THEN
475
476	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
477
478	send_receive = 'lr'
479	sendrecv_in_background = .TRUE.
480	req = 0
481	req_count = 0
482
483	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
484	on_device = .TRUE. ! to be removed after complete porting
485	ELSE ! of ghost point exchange
486	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
487	ENDIF
488
489	CALL exchange_horiz( u_p, nbgp )
490	CALL exchange_horiz( v_p, nbgp )
491	CALL exchange_horiz( w_p, nbgp )
492	CALL exchange_horiz( pt_p, nbgp )
493	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
494	IF ( ocean ) THEN
495	CALL exchange_horiz( sa_p, nbgp )
496	CALL exchange_horiz( rho, nbgp )
497	CALL exchange_horiz( prho, nbgp )
498	ENDIF
499	IF (humidity .OR. passive_scalar) THEN
500	CALL exchange_horiz( q_p, nbgp )
501	IF ( cloud_physics .AND. microphysics_seifert ) THEN
502	CALL exchange_horiz( qr_p, nbgp )
503	CALL exchange_horiz( nr_p, nbgp )
504	ENDIF
505	ENDIF
506	IF ( cloud_droplets ) THEN
507	CALL exchange_horiz( ql, nbgp )
508	CALL exchange_horiz( ql_c, nbgp )
509	CALL exchange_horiz( ql_v, nbgp )
510	CALL exchange_horiz( ql_vp, nbgp )
511	ENDIF
512	IF ( wang_kernel .OR. collision_turbulence .OR. &
513	use_sgs_for_particles ) THEN
514	CALL exchange_horiz( diss, nbgp )
515	ENDIF
516
517	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
518	on_device = .FALSE. ! to be removed after complete porting
519	ELSE ! of ghost point exchange
520	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
521	ENDIF
522
523	sendrecv_in_background = .FALSE.
524
525	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
526
527	ENDIF
528
529	! i_left = nxl+nbgp; i_right = nxr-nbgp
530	! j_south = nys; j_north = nys+nbgp-1
531	! CALL prognostic_equations_acc
532	! i_left = nxl+nbgp; i_right = nxr-nbgp
533	! j_south = nyn-nbgp+1; j_north = nyn
534	! CALL prognostic_equations_acc
535
536	IF ( background_communication ) THEN
537	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
538	#if defined( __parallel )
539	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
540	#endif
541	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
542
543	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
544
545	send_receive = 'ns'
546	sendrecv_in_background = .TRUE.
547	req = 0
548	req_count = 0
549
550	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
551	on_device = .TRUE. ! to be removed after complete porting
552	ELSE ! of ghost point exchange
553	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
554	ENDIF
555
556	CALL exchange_horiz( u_p, nbgp )
557	CALL exchange_horiz( v_p, nbgp )
558	CALL exchange_horiz( w_p, nbgp )
559	CALL exchange_horiz( pt_p, nbgp )
560	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
561	IF ( ocean ) THEN
562	CALL exchange_horiz( sa_p, nbgp )
563	CALL exchange_horiz( rho, nbgp )
564	CALL exchange_horiz( prho, nbgp )
565	ENDIF
566	IF (humidity .OR. passive_scalar) THEN
567	CALL exchange_horiz( q_p, nbgp )
568	IF ( cloud_physics .AND. microphysics_seifert ) THEN
569	CALL exchange_horiz( qr_p, nbgp )
570	CALL exchange_horiz( nr_p, nbgp )
571	ENDIF
572	ENDIF
573	IF ( cloud_droplets ) THEN
574	CALL exchange_horiz( ql, nbgp )
575	CALL exchange_horiz( ql_c, nbgp )
576	CALL exchange_horiz( ql_v, nbgp )
577	CALL exchange_horiz( ql_vp, nbgp )
578	ENDIF
579	IF ( wang_kernel .OR. collision_turbulence .OR. &
580	use_sgs_for_particles ) THEN
581	CALL exchange_horiz( diss, nbgp )
582	ENDIF
583
584	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
585	on_device = .FALSE. ! to be removed after complete porting
586	ELSE ! of ghost point exchange
587	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
588	ENDIF
589
590	sendrecv_in_background = .FALSE.
591
592	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
593
594	ENDIF
595
596	! i_left = nxl+nbgp; i_right = nxr-nbgp
597	! j_south = nys+nbgp; j_north = nyn-nbgp
598	! CALL prognostic_equations_acc
599
600	IF ( background_communication ) THEN
601	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
602	#if defined( __parallel )
603	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
604	#endif
605	send_receive = 'al'
606	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
607	ENDIF
608
609	ENDIF
610
611	!
612	!-- Particle transport/physics with the Lagrangian particle model
613	!-- (only once during intermediate steps, because it uses an Euler-step)
614	!-- ### particle model should be moved before prognostic_equations, in order
615	!-- to regard droplet interactions directly
616	IF ( particle_advection .AND. &
617	simulated_time >= particle_advection_start .AND. &
618	intermediate_timestep_count == 1 ) THEN
619	CALL lpm
620	first_call_lpm = .FALSE.
621	ENDIF
622
623	!
624	!-- Interaction of droplets with temperature and specific humidity.
625	!-- Droplet condensation and evaporation is calculated within
626	!-- advec_particles.
627	IF ( cloud_droplets .AND. &
628	intermediate_timestep_count == intermediate_timestep_count_max )&
629	THEN
630	CALL interaction_droplets_ptq
631	ENDIF
632
633	!
634	!-- Exchange of ghost points (lateral boundary conditions)
635	IF ( .NOT. background_communication ) THEN
636
637	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
638
639	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
640	on_device = .TRUE. ! to be removed after complete porting
641	ELSE ! of ghost point exchange
642	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
643	ENDIF
644
645	CALL exchange_horiz( u_p, nbgp )
646	CALL exchange_horiz( v_p, nbgp )
647	CALL exchange_horiz( w_p, nbgp )
648	CALL exchange_horiz( pt_p, nbgp )
649	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
650	IF ( ocean ) THEN
651	CALL exchange_horiz( sa_p, nbgp )
652	CALL exchange_horiz( rho, nbgp )
653	CALL exchange_horiz( prho, nbgp )
654	ENDIF
655	IF (humidity .OR. passive_scalar) THEN
656	CALL exchange_horiz( q_p, nbgp )
657	IF ( cloud_physics .AND. microphysics_seifert ) THEN
658	CALL exchange_horiz( qr_p, nbgp )
659	CALL exchange_horiz( nr_p, nbgp )
660	ENDIF
661	ENDIF
662	IF ( cloud_droplets ) THEN
663	CALL exchange_horiz( ql, nbgp )
664	CALL exchange_horiz( ql_c, nbgp )
665	CALL exchange_horiz( ql_v, nbgp )
666	CALL exchange_horiz( ql_vp, nbgp )
667	ENDIF
668	IF ( wang_kernel .OR. collision_turbulence .OR. &
669	use_sgs_for_particles ) THEN
670	CALL exchange_horiz( diss, nbgp )
671	ENDIF
672
673	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
674	on_device = .FALSE. ! to be removed after complete porting
675	ELSE ! of ghost point exchange
676	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
677	ENDIF
678
679	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
680
681	ENDIF
682
683	!
684	!-- Boundary conditions for the prognostic quantities (except of the
685	!-- velocities at the outflow in case of a non-cyclic lateral wall)
686	CALL boundary_conds
687
688	!
689	!-- Swap the time levels in preparation for the next time step.
690	CALL swap_timelevel
691
692	IF ( nested_run ) THEN
693
694	CALL cpu_log( log_point(60), 'nesting', 'start' )
695	!
696	!-- Domain nesting. The data transfer subroutines pmci_server_datatrans
697	!-- and pmci_client_datatatrans are called inside the wrapper
698	!-- subroutine pmci_datatrans according to the control parameters
699	!-- nesting_mode and nesting_datatransfer_mode.
700	!-- TO_DO: why is nesting_mode given as a parameter here?
701	CALL pmci_datatrans( nesting_mode )
702
703	IF ( nesting_mode == 'two-way' ) THEN
704	!
705	!-- Exchange_horiz is needed for all server-domains after the
706	!-- anterpolation
707	CALL exchange_horiz( u, nbgp )
708	CALL exchange_horiz( v, nbgp )
709	CALL exchange_horiz( w, nbgp )
710	CALL exchange_horiz( pt, nbgp )
711	IF ( humidity .OR. passive_scalar ) THEN
712	CALL exchange_horiz( q, nbgp )
713	ENDIF
714	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
715	ENDIF
716	!
717	!-- Correct the w top-BC in nest domains to ensure mass conservation.
718	!-- This action must never be done for the root domain.
719	IF ( nest_domain ) THEN
720	CALL pmci_ensure_nest_mass_conservation
721	ENDIF
722
723	CALL cpu_log( log_point(60), 'nesting', 'stop' )
724
725	ENDIF
726
727	!
728	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
729	!-- when a sloping surface is used
730	IF ( sloping_surface ) THEN
731	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
732	pt_slope_offset
733	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
734	pt_slope_offset
735	ENDIF
736
737	!
738	!-- Impose a turbulent inflow using the recycling method
739	IF ( turbulent_inflow ) CALL inflow_turbulence
740
741	!
742	!-- Impose a random perturbation on the horizontal velocity field
743	IF ( create_disturbances .AND. &
744	( call_psolver_at_all_substeps .AND. &
745	intermediate_timestep_count == intermediate_timestep_count_max )&
746	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
747	intermediate_timestep_count == 1 ) ) &
748	THEN
749	time_disturb = time_disturb + dt_3d
750	IF ( time_disturb >= dt_disturb ) THEN
751	!$acc update host( u, v )
752	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
753	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
754	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
755	CALL disturb_field( nzb_u_inner, tend, u )
756	CALL disturb_field( nzb_v_inner, tend, v )
757	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
758	!
759	!-- Runs with a non-cyclic lateral wall need perturbations
760	!-- near the inflow throughout the whole simulation
761	dist_range = 1
762	CALL disturb_field( nzb_u_inner, tend, u )
763	CALL disturb_field( nzb_v_inner, tend, v )
764	dist_range = 0
765	ENDIF
766	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
767	!$acc update device( u, v )
768	time_disturb = time_disturb - dt_disturb
769	ENDIF
770	ENDIF
771
772	!
773	!-- Reduce the velocity divergence via the equation for perturbation
774	!-- pressure.
775	IF ( intermediate_timestep_count == 1 .OR. &
776	call_psolver_at_all_substeps ) THEN
777	CALL pres
778	ENDIF
779
780	!
781	!-- If required, compute liquid water content
782	IF ( cloud_physics ) THEN
783	CALL calc_liquid_water_content
784	!$acc update device( ql )
785	ENDIF
786	!
787	!-- If required, compute virtual potential temperature
788	IF ( humidity ) THEN
789	CALL compute_vpt
790	!$acc update device( vpt )
791	ENDIF
792
793	!
794	!-- Compute the diffusion quantities
795	IF ( .NOT. constant_diffusion ) THEN
796
797	!
798	!-- Determine surface fluxes shf and qsws and surface values
799	!-- pt_surface and q_surface in dependence on data from external
800	!-- file LSF_DATA respectively
801	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
802	intermediate_timestep_count == intermediate_timestep_count_max )&
803	THEN
804	CALL ls_forcing_surf ( simulated_time )
805	ENDIF
806
807	!
808	!-- First the vertical fluxes in the surface (constant flux) layer are computed
809	IF ( constant_flux_layer ) THEN
810	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
811	CALL surface_layer_fluxes
812	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
813	ENDIF
814
815	!
816	!-- If required, solve the energy balance for the surface and run soil
817	!-- model
818	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
819
820	CALL cpu_log( log_point(54), 'land_surface', 'start' )
821	CALL lsm_energy_balance
822	CALL lsm_soil_model
823	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
824	ENDIF
825	!
826	!-- Compute the diffusion coefficients
827	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
828	IF ( .NOT. humidity ) THEN
829	IF ( ocean ) THEN
830	CALL diffusivities( prho, prho_reference )
831	ELSE
832	CALL diffusivities( pt, pt_reference )
833	ENDIF
834	ELSE
835	CALL diffusivities( vpt, pt_reference )
836	ENDIF
837	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
838
839	ENDIF
840
841	!
842	!-- If required, calculate radiative fluxes and heating rates
843	IF ( radiation .AND. intermediate_timestep_count &
844	== intermediate_timestep_count_max .AND. simulated_time > &
845	skip_time_do_radiation ) THEN
846
847	time_radiation = time_radiation + dt_3d
848
849	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
850	THEN
851
852	CALL cpu_log( log_point(50), 'radiation', 'start' )
853
854	IF ( .NOT. force_radiation_call ) THEN
855	time_radiation = time_radiation - dt_radiation
856	ENDIF
857
858	IF ( radiation_scheme == 'clear-sky' ) THEN
859	CALL radiation_clearsky
860	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
861	CALL radiation_rrtmg
862	ENDIF
863
864	CALL cpu_log( log_point(50), 'radiation', 'stop' )
865	ENDIF
866	ENDIF
867
868	ENDDO ! Intermediate step loop
869
870	!
871	!-- Increase simulation time and output times
872	nr_timesteps_this_run = nr_timesteps_this_run + 1
873	current_timestep_number = current_timestep_number + 1
874	simulated_time = simulated_time + dt_3d
875	simulated_time_chr = time_to_string( simulated_time )
876	time_since_reference_point = simulated_time - coupling_start_time
877
878	IF ( simulated_time >= skip_time_data_output_av ) THEN
879	time_do_av = time_do_av + dt_3d
880	ENDIF
881	IF ( simulated_time >= skip_time_do2d_xy ) THEN
882	time_do2d_xy = time_do2d_xy + dt_3d
883	ENDIF
884	IF ( simulated_time >= skip_time_do2d_xz ) THEN
885	time_do2d_xz = time_do2d_xz + dt_3d
886	ENDIF
887	IF ( simulated_time >= skip_time_do2d_yz ) THEN
888	time_do2d_yz = time_do2d_yz + dt_3d
889	ENDIF
890	IF ( simulated_time >= skip_time_do3d ) THEN
891	time_do3d = time_do3d + dt_3d
892	ENDIF
893	DO mid = 1, masks
894	IF ( simulated_time >= skip_time_domask(mid) ) THEN
895	time_domask(mid)= time_domask(mid) + dt_3d
896	ENDIF
897	ENDDO
898	time_dvrp = time_dvrp + dt_3d
899	IF ( simulated_time >= skip_time_dosp ) THEN
900	time_dosp = time_dosp + dt_3d
901	ENDIF
902	time_dots = time_dots + dt_3d
903	IF ( .NOT. first_call_lpm ) THEN
904	time_dopts = time_dopts + dt_3d
905	ENDIF
906	IF ( simulated_time >= skip_time_dopr ) THEN
907	time_dopr = time_dopr + dt_3d
908	ENDIF
909	time_dopr_listing = time_dopr_listing + dt_3d
910	time_run_control = time_run_control + dt_3d
911
912	!
913	!-- Data exchange between coupled models
914	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
915	time_coupling = time_coupling + dt_3d
916
917	!
918	!-- In case of model termination initiated by the local model
919	!-- (terminate_coupled > 0), the coupler must be skipped because it would
920	!-- cause an MPI intercomminucation hang.
921	!-- If necessary, the coupler will be called at the beginning of the
922	!-- next restart run.
923	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
924	CALL surface_coupler
925	time_coupling = time_coupling - dt_coupling
926	ENDDO
927	ENDIF
928
929	!
930	!-- Execute user-defined actions
931	CALL user_actions( 'after_integration' )
932
933	!
934	!-- If Galilei transformation is used, determine the distance that the
935	!-- model has moved so far
936	IF ( galilei_transformation ) THEN
937	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
938	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
939	ENDIF
940
941	!
942	!-- Check, if restart is necessary (because cpu-time is expiring or
943	!-- because it is forced by user) and set stop flag
944	!-- This call is skipped if the remote model has already initiated a restart.
945	IF ( .NOT. terminate_run ) CALL check_for_restart
946
947	!
948	!-- Carry out statistical analysis and output at the requested output times.
949	!-- The MOD function is used for calculating the output time counters (like
950	!-- time_dopr) in order to regard a possible decrease of the output time
951	!-- interval in case of restart runs
952
953	!
954	!-- Set a flag indicating that so far no statistics have been created
955	!-- for this time step
956	flow_statistics_called = .FALSE.
957
958	!
959	!-- If required, call flow_statistics for averaging in time
960	IF ( averaging_interval_pr /= 0.0_wp .AND. &
961	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
962	simulated_time >= skip_time_dopr ) THEN
963	time_dopr_av = time_dopr_av + dt_3d
964	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
965	do_sum = .TRUE.
966	time_dopr_av = MOD( time_dopr_av, &
967	MAX( dt_averaging_input_pr, dt_3d ) )
968	ENDIF
969	ENDIF
970	IF ( do_sum ) CALL flow_statistics
971
972	!
973	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
974	IF ( averaging_interval /= 0.0_wp .AND. &
975	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
976	simulated_time >= skip_time_data_output_av ) &
977	THEN
978	time_do_sla = time_do_sla + dt_3d
979	IF ( time_do_sla >= dt_averaging_input ) THEN
980	CALL sum_up_3d_data
981	average_count_3d = average_count_3d + 1
982	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
983	ENDIF
984	ENDIF
985
986	!
987	!-- Calculate spectra for time averaging
988	IF ( averaging_interval_sp /= 0.0_wp .AND. &
989	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
990	simulated_time >= skip_time_dosp ) THEN
991	time_dosp_av = time_dosp_av + dt_3d
992	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
993	CALL calc_spectra
994	time_dosp_av = MOD( time_dosp_av, &
995	MAX( dt_averaging_input_pr, dt_3d ) )
996	ENDIF
997	ENDIF
998
999	!
1000	!-- Computation and output of run control parameters.
1001	!-- This is also done whenever perturbations have been imposed
1002	IF ( time_run_control >= dt_run_control .OR. &
1003	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
1004	THEN
1005	CALL run_control
1006	IF ( time_run_control >= dt_run_control ) THEN
1007	time_run_control = MOD( time_run_control, &
1008	MAX( dt_run_control, dt_3d ) )
1009	ENDIF
1010	ENDIF
1011
1012	!
1013	!-- Profile output (ASCII) on file
1014	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1015	CALL print_1d
1016	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1017	dt_3d ) )
1018	ENDIF
1019
1020	!
1021	!-- Graphic output for PROFIL
1022	IF ( time_dopr >= dt_dopr ) THEN
1023	IF ( dopr_n /= 0 ) CALL data_output_profiles
1024	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1025	time_dopr_av = 0.0_wp ! due to averaging (see above)
1026	ENDIF
1027
1028	!
1029	!-- Graphic output for time series
1030	IF ( time_dots >= dt_dots ) THEN
1031	CALL data_output_tseries
1032	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1033	ENDIF
1034
1035	!
1036	!-- Output of spectra (formatted for use with PROFIL), in case of no
1037	!-- time averaging, spectra has to be calculated before
1038	IF ( time_dosp >= dt_dosp ) THEN
1039	IF ( average_count_sp == 0 ) CALL calc_spectra
1040	CALL data_output_spectra
1041	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1042	ENDIF
1043
1044	!
1045	!-- 2d-data output (cross-sections)
1046	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1047	CALL data_output_2d( 'xy', 0 )
1048	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1049	ENDIF
1050	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1051	CALL data_output_2d( 'xz', 0 )
1052	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1053	ENDIF
1054	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1055	CALL data_output_2d( 'yz', 0 )
1056	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1057	ENDIF
1058
1059	!
1060	!-- 3d-data output (volume data)
1061	IF ( time_do3d >= dt_do3d ) THEN
1062	CALL data_output_3d( 0 )
1063	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1064	ENDIF
1065
1066	!
1067	!-- Masked data output
1068	DO mid = 1, masks
1069	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1070	CALL data_output_mask( 0 )
1071	time_domask(mid) = MOD( time_domask(mid), &
1072	MAX( dt_domask(mid), dt_3d ) )
1073	ENDIF
1074	ENDDO
1075
1076	!
1077	!-- Output of time-averaged 2d/3d/masked data
1078	IF ( time_do_av >= dt_data_output_av ) THEN
1079	CALL average_3d_data
1080	CALL data_output_2d( 'xy', 1 )
1081	CALL data_output_2d( 'xz', 1 )
1082	CALL data_output_2d( 'yz', 1 )
1083	CALL data_output_3d( 1 )
1084	DO mid = 1, masks
1085	CALL data_output_mask( 1 )
1086	ENDDO
1087	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1088	ENDIF
1089
1090	!
1091	!-- Output of particle time series
1092	IF ( particle_advection ) THEN
1093	IF ( time_dopts >= dt_dopts .OR. &
1094	( simulated_time >= particle_advection_start .AND. &
1095	first_call_lpm ) ) THEN
1096	CALL data_output_ptseries
1097	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1098	ENDIF
1099	ENDIF
1100
1101	!
1102	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1103	#if defined( __dvrp_graphics )
1104	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1105	#endif
1106	IF ( time_dvrp >= dt_dvrp ) THEN
1107	CALL data_output_dvrp
1108	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1109	ENDIF
1110	#if defined( __dvrp_graphics )
1111	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1112	#endif
1113
1114	!
1115	!-- If required, set the heat flux for the next time step at a random value
1116	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
1117
1118	!
1119	!-- Execute user-defined actions
1120	CALL user_actions( 'after_timestep' )
1121
1122	!
1123	!-- Output elapsed simulated time in form of a progress bar on stdout
1124	IF ( myid == 0 ) CALL output_progress_bar
1125
1126	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1127
1128
1129	ENDDO ! time loop
1130
1131	IF ( myid == 0 ) CALL finish_progress_bar
1132
1133	#if defined( __dvrp_graphics )
1134	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1135	#endif
1136
1137	CALL location_message( 'finished time-stepping', .TRUE. )
1138
1139	END SUBROUTINE time_integration

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