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source: palm/trunk/SOURCE/time_integration.f90 @ 1826

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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	!
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: time_integration.f90 1823 2016-04-07 08:57:52Z maronga $
26	!
27	! 1822 2016-04-07 07:49:42Z hoffmann
28	! icloud_scheme replaced by microphysics_*
29	!
30	! 1808 2016-04-05 19:44:00Z raasch
31	! output message in case unscheduled radiation calls removed
32	!
33	! 1797 2016-03-21 16:50:28Z raasch
34	! introduction of different datatransfer modes
35	!
36	! 1791 2016-03-11 10:41:25Z raasch
37	! call of pmci_update_new removed
38	!
39	! 1786 2016-03-08 05:49:27Z raasch
40	! +module spectrum
41	!
42	! 1783 2016-03-06 18:36:17Z raasch
43	! switch back of netcdf data format for mask output moved to the mask output
44	! routine
45	!
46	! 1781 2016-03-03 15:12:23Z raasch
47	! some pmc calls removed at the beginning (before timeloop),
48	! pmc initialization moved to the main program
49	!
50	! 1764 2016-02-28 12:45:19Z raasch
51	! PMC_ACTIVE flags removed,
52	! bugfix: nest synchronization after first call of timestep
53	!
54	! 1762 2016-02-25 12:31:13Z hellstea
55	! Introduction of nested domain feature
56	!
57	! 1736 2015-12-04 08:56:33Z raasch
58	! no perturbations added to total domain if energy limit has been set zero
59	!
60	! 1691 2015-10-26 16:17:44Z maronga
61	! Added option for spin-ups without land surface and radiation models. Moved calls
62	! for radiation and lan surface schemes.
63	!
64	! 1682 2015-10-07 23:56:08Z knoop
65	! Code annotations made doxygen readable
66	!
67	! 1671 2015-09-25 03:29:37Z raasch
68	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
69	! for particles
70	!
71	! 1585 2015-04-30 07:05:52Z maronga
72	! Moved call of radiation scheme. Added support for RRTM
73	!
74	! 1551 2015-03-03 14:18:16Z maronga
75	! Added interface for different radiation schemes.
76	!
77	! 1496 2014-12-02 17:25:50Z maronga
78	! Added calls for the land surface model and radiation scheme
79	!
80	! 1402 2014-05-09 14:25:13Z raasch
81	! location messages modified
82	!
83	! 1384 2014-05-02 14:31:06Z raasch
84	! location messages added
85	!
86	! 1380 2014-04-28 12:40:45Z heinze
87	! CALL of nudge_ref added
88	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
89	!
90	! 1365 2014-04-22 15:03:56Z boeske
91	! Reset sums_ls_l to zero at each timestep
92	! +sums_ls_l
93	! Calculation of reference state (previously in subroutine calc_mean_profile)
94
95	! 1342 2014-03-26 17:04:47Z kanani
96	! REAL constants defined as wp-kind
97	!
98	! 1320 2014-03-20 08:40:49Z raasch
99	! ONLY-attribute added to USE-statements,
100	! kind-parameters added to all INTEGER and REAL declaration statements,
101	! kinds are defined in new module kinds,
102	! old module precision_kind is removed,
103	! revision history before 2012 removed,
104	! comment fields (!:) to be used for variable explanations added to
105	! all variable declaration statements
106	! 1318 2014-03-17 13:35:16Z raasch
107	! module interfaces removed
108	!
109	! 1308 2014-03-13 14:58:42Z fricke
110	! +netcdf_data_format_save
111	! For masked data, parallel netcdf output is not tested so far, hence
112	! netcdf_data_format is switched back to non-paralell output.
113	!
114	! 1276 2014-01-15 13:40:41Z heinze
115	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
116	!
117	! 1257 2013-11-08 15:18:40Z raasch
118	! acc-update-host directive for timestep removed
119	!
120	! 1241 2013-10-30 11:36:58Z heinze
121	! Generalize calc_mean_profile for wider use
122	! Determine shf and qsws in dependence on data from LSF_DATA
123	! Determine ug and vg in dependence on data from LSF_DATA
124	! 1221 2013-09-10 08:59:13Z raasch
125	! host update of arrays before timestep is called
126	!
127	! 1179 2013-06-14 05:57:58Z raasch
128	! mean profiles for reference state are only calculated if required,
129	! small bugfix for background communication
130	!
131	! 1171 2013-05-30 11:27:45Z raasch
132	! split of prognostic_equations deactivated (comment lines), for the time being
133	!
134	! 1128 2013-04-12 06:19:32Z raasch
135	! asynchronous transfer of ghost point data realized for acc-optimized version:
136	! prognostic_equations are first called two times for those points required for
137	! the left-right and north-south exchange, respectively, and then for the
138	! remaining points,
139	! those parts requiring global communication moved from prognostic_equations to
140	! here
141	!
142	! 1115 2013-03-26 18:16:16Z hoffmann
143	! calculation of qr and nr is restricted to precipitation
144	!
145	! 1113 2013-03-10 02:48:14Z raasch
146	! GPU-porting of boundary conditions,
147	! openACC directives updated
148	! formal parameter removed from routine boundary_conds
149	!
150	! 1111 2013-03-08 23:54:10Z raasch
151	! +internal timestep counter for cpu statistics added,
152	! openACC directives updated
153	!
154	! 1092 2013-02-02 11:24:22Z raasch
155	! unused variables removed
156	!
157	! 1065 2012-11-22 17:42:36Z hoffmann
158	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
159	!
160	! 1053 2012-11-13 17:11:03Z hoffmann
161	! exchange of ghost points for nr, qr added
162	!
163	! 1036 2012-10-22 13:43:42Z raasch
164	! code put under GPL (PALM 3.9)
165	!
166	! 1019 2012-09-28 06:46:45Z raasch
167	! non-optimized version of prognostic_equations removed
168	!
169	! 1015 2012-09-27 09:23:24Z raasch
170	! +call of prognostic_equations_acc
171	!
172	! 1001 2012-09-13 14:08:46Z raasch
173	! all actions concerning leapfrog- and upstream-spline-scheme removed
174	!
175	! 849 2012-03-15 10:35:09Z raasch
176	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
177	!
178	! 825 2012-02-19 03:03:44Z raasch
179	! wang_collision_kernel renamed wang_kernel
180	!
181	! Revision 1.1 1997/08/11 06:19:04 raasch
182	! Initial revision
183	!
184	!
185	! Description:
186	! ------------
187	!> Integration in time of the model equations, statistical analysis and graphic
188	!> output
189	!------------------------------------------------------------------------------!
190	SUBROUTINE time_integration
191
192
193	USE advec_ws, &
194	ONLY: ws_statistics
195
196	USE arrays_3d, &
197	ONLY: diss, dzu, e, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, &
198	ql, ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, &
199	u, u_p, v, vpt, v_p, w, w_p
200
201	USE calc_mean_profile_mod, &
202	ONLY: calc_mean_profile
203
204	USE control_parameters, &
205	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
206	average_count_sp, averaging_interval, averaging_interval_pr, &
207	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
208	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
209	cloud_physics, constant_flux_layer, constant_heatflux, &
210	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
211	coupling_start_time, current_timestep_number, &
212	disturbance_created, disturbance_energy_limit, dist_range, &
213	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
214	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
215	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
216	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
217	end_time, first_call_lpm, galilei_transformation, humidity, &
218	intermediate_timestep_count, &
219	intermediate_timestep_count_max, large_scale_forcing, &
220	loop_optimization, lsf_surf, lsf_vert, masks, &
221	microphysics_seifert, mid, nest_domain, &
222	neutral, nr_timesteps_this_run, nudging, &
223	ocean, on_device, passive_scalar, &
224	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
225	run_coupled, simulated_time, simulated_time_chr, &
226	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
227	skip_time_do3d, skip_time_domask, skip_time_dopr, &
228	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
229	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
230	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
231	time_do3d, time_domask, time_dopr, time_dopr_av, &
232	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
233	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
234	time_run_control, time_since_reference_point, &
235	turbulence, &
236	turbulent_inflow, use_initial_profile_as_reference, &
237	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
238	ws_scheme_sca
239
240	USE cpulog, &
241	ONLY: cpu_log, log_point, log_point_s
242
243	USE indices, &
244	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
245	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
246
247	USE interaction_droplets_ptq_mod, &
248	ONLY: interaction_droplets_ptq
249
250	USE kinds
251
252	USE land_surface_model_mod, &
253	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
254	skip_time_do_lsm
255
256	USE ls_forcing_mod, &
257	ONLY: ls_forcing_surf, ls_forcing_vert
258
259	USE nudge_mod, &
260	ONLY: calc_tnudge, nudge_ref
261
262	USE particle_attributes, &
263	ONLY: particle_advection, particle_advection_start, &
264	use_sgs_for_particles, wang_kernel
265
266	USE pegrid
267
268	USE pmc_interface, &
269	ONLY: client_to_server, nested_run, nesting_mode, &
270	pmci_client_synchronize, pmci_datatrans, &
271	pmci_ensure_nest_mass_conservation, &
272	pmci_server_synchronize, server_to_client
273
274	USE production_e_mod, &
275	ONLY: production_e_init
276
277	USE progress_bar, &
278	ONLY: finish_progress_bar, output_progress_bar
279
280	USE prognostic_equations_mod, &
281	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
282	prognostic_equations_vector
283
284	USE radiation_model_mod, &
285	ONLY: dt_radiation, force_radiation_call, radiation, &
286	radiation_clearsky, radiation_rrtmg, radiation_scheme, &
287	skip_time_do_radiation, time_radiation
288
289	USE spectrum, &
290	ONLY: calc_spectra
291
292	USE statistics, &
293	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
294
295	USE surface_layer_fluxes_mod, &
296	ONLY: surface_layer_fluxes
297
298	USE user_actions_mod, &
299	ONLY: user_actions
300
301	IMPLICIT NONE
302
303	CHARACTER (LEN=9) :: time_to_string !<
304
305	!
306	!-- At the beginning of a simulation determine the time step as well as
307	!-- determine and print out the run control parameters
308	IF ( simulated_time == 0.0_wp ) CALL timestep
309
310	!
311	!-- Synchronize the timestep in case of nested run.
312	!-- The server side must be called first
313	IF ( nested_run ) THEN
314	CALL pmci_server_synchronize
315	CALL pmci_client_synchronize
316	ENDIF
317
318	CALL run_control
319
320	!
321	!-- Data exchange between coupled models in case that a call has been omitted
322	!-- at the end of the previous run of a job chain.
323	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
324	!
325	!-- In case of model termination initiated by the local model the coupler
326	!-- must not be called because this would again cause an MPI hang.
327	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
328	CALL surface_coupler
329	time_coupling = time_coupling - dt_coupling
330	ENDDO
331	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
332	THEN
333	time_coupling = time_since_reference_point
334	ENDIF
335	ENDIF
336
337	#if defined( __dvrp_graphics )
338	!
339	!-- Time measurement with dvrp software
340	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
341	#endif
342
343	CALL location_message( 'start with time-stepping', .TRUE. )
344	!
345	!-- Start of the time loop
346	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
347	.NOT. terminate_run )
348
349	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
350
351	!
352	!-- Determine size of next time step
353	IF ( simulated_time /= 0.0_wp ) THEN
354	CALL timestep
355
356	IF ( nested_run ) THEN
357	!
358	!-- TO_DO: try to give more detailed and meaningful comments here
359	!-- Server side must be called first
360	CALL pmci_server_synchronize
361	CALL pmci_client_synchronize
362	ENDIF
363	ENDIF
364
365
366	!
367	!-- Determine ug, vg and w_subs in dependence on data from external file
368	!-- LSF_DATA
369	IF ( large_scale_forcing .AND. lsf_vert ) THEN
370	CALL ls_forcing_vert ( simulated_time )
371	sums_ls_l = 0.0_wp
372	ENDIF
373
374	!
375	!-- Set pt_init and q_init to the current profiles taken from
376	!-- NUDGING_DATA
377	IF ( nudging ) THEN
378	CALL nudge_ref ( simulated_time )
379	!
380	!-- Store temperature gradient at the top boundary for possible Neumann
381	!-- boundary condition
382	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
383	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
384	ENDIF
385
386	!
387	!-- Execute the user-defined actions
388	CALL user_actions( 'before_timestep' )
389
390	!
391	!-- Start of intermediate step loop
392	intermediate_timestep_count = 0
393	DO WHILE ( intermediate_timestep_count < &
394	intermediate_timestep_count_max )
395
396	intermediate_timestep_count = intermediate_timestep_count + 1
397
398	!
399	!-- Set the steering factors for the prognostic equations which depend
400	!-- on the timestep scheme
401	CALL timestep_scheme_steering
402
403	!
404	!-- Calculate those variables needed in the tendency terms which need
405	!-- global communication
406	IF ( .NOT. use_single_reference_value .AND. &
407	.NOT. use_initial_profile_as_reference ) THEN
408	!
409	!-- Horizontally averaged profiles to be used as reference state in
410	!-- buoyancy terms (WARNING: only the respective last call of
411	!-- calc_mean_profile defines the reference state!)
412	IF ( .NOT. neutral ) THEN
413	CALL calc_mean_profile( pt, 4 )
414	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
415	ENDIF
416	IF ( ocean ) THEN
417	CALL calc_mean_profile( rho, 64 )
418	ref_state(:) = hom(:,1,64,0)
419	ENDIF
420	IF ( humidity ) THEN
421	CALL calc_mean_profile( vpt, 44 )
422	ref_state(:) = hom(:,1,44,0)
423	ENDIF
424
425	ENDIF
426
427	IF ( .NOT. constant_diffusion ) CALL production_e_init
428	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
429	intermediate_timestep_count == 1 ) CALL ws_statistics
430	!
431	!-- In case of nudging calculate current nudging time scale and horizontal
432	!-- means of u, v, pt and q
433	IF ( nudging ) THEN
434	CALL calc_tnudge( simulated_time )
435	CALL calc_mean_profile( u, 1 )
436	CALL calc_mean_profile( v, 2 )
437	CALL calc_mean_profile( pt, 4 )
438	CALL calc_mean_profile( q, 41 )
439	ENDIF
440
441	!
442	!-- Solve the prognostic equations. A fast cache optimized version with
443	!-- only one single loop is used in case of Piascek-Williams advection
444	!-- scheme. NEC vector machines use a different version, because
445	!-- in the other versions a good vectorization is prohibited due to
446	!-- inlining problems.
447	IF ( loop_optimization == 'cache' ) THEN
448	CALL prognostic_equations_cache
449	ELSEIF ( loop_optimization == 'vector' ) THEN
450	CALL prognostic_equations_vector
451	ELSEIF ( loop_optimization == 'acc' ) THEN
452	i_left = nxl; i_right = nxr
453	j_south = nys; j_north = nyn
454	CALL prognostic_equations_acc
455
456	! i_left = nxl; i_right = nxl+nbgp-1
457	! j_south = nys; j_north = nyn
458	! CALL prognostic_equations_acc
459	! i_left = nxr-nbgp+1; i_right = nxr
460	! j_south = nys; j_north = nyn
461	! CALL prognostic_equations_acc
462
463	!
464	!-- Exchange of ghost points (lateral boundary conditions)
465	IF ( background_communication ) THEN
466
467	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
468
469	send_receive = 'lr'
470	sendrecv_in_background = .TRUE.
471	req = 0
472	req_count = 0
473
474	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
475	on_device = .TRUE. ! to be removed after complete porting
476	ELSE ! of ghost point exchange
477	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
478	ENDIF
479
480	CALL exchange_horiz( u_p, nbgp )
481	CALL exchange_horiz( v_p, nbgp )
482	CALL exchange_horiz( w_p, nbgp )
483	CALL exchange_horiz( pt_p, nbgp )
484	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
485	IF ( ocean ) THEN
486	CALL exchange_horiz( sa_p, nbgp )
487	CALL exchange_horiz( rho, nbgp )
488	CALL exchange_horiz( prho, nbgp )
489	ENDIF
490	IF (humidity .OR. passive_scalar) THEN
491	CALL exchange_horiz( q_p, nbgp )
492	IF ( cloud_physics .AND. microphysics_seifert ) THEN
493	CALL exchange_horiz( qr_p, nbgp )
494	CALL exchange_horiz( nr_p, nbgp )
495	ENDIF
496	ENDIF
497	IF ( cloud_droplets ) THEN
498	CALL exchange_horiz( ql, nbgp )
499	CALL exchange_horiz( ql_c, nbgp )
500	CALL exchange_horiz( ql_v, nbgp )
501	CALL exchange_horiz( ql_vp, nbgp )
502	ENDIF
503	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
504	THEN
505	CALL exchange_horiz( diss, nbgp )
506	ENDIF
507
508	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
509	on_device = .FALSE. ! to be removed after complete porting
510	ELSE ! of ghost point exchange
511	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
512	ENDIF
513
514	sendrecv_in_background = .FALSE.
515
516	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
517
518	ENDIF
519
520	! i_left = nxl+nbgp; i_right = nxr-nbgp
521	! j_south = nys; j_north = nys+nbgp-1
522	! CALL prognostic_equations_acc
523	! i_left = nxl+nbgp; i_right = nxr-nbgp
524	! j_south = nyn-nbgp+1; j_north = nyn
525	! CALL prognostic_equations_acc
526
527	IF ( background_communication ) THEN
528	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
529	#if defined( __parallel )
530	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
531	#endif
532	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
533
534	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
535
536	send_receive = 'ns'
537	sendrecv_in_background = .TRUE.
538	req = 0
539	req_count = 0
540
541	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
542	on_device = .TRUE. ! to be removed after complete porting
543	ELSE ! of ghost point exchange
544	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
545	ENDIF
546
547	CALL exchange_horiz( u_p, nbgp )
548	CALL exchange_horiz( v_p, nbgp )
549	CALL exchange_horiz( w_p, nbgp )
550	CALL exchange_horiz( pt_p, nbgp )
551	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
552	IF ( ocean ) THEN
553	CALL exchange_horiz( sa_p, nbgp )
554	CALL exchange_horiz( rho, nbgp )
555	CALL exchange_horiz( prho, nbgp )
556	ENDIF
557	IF (humidity .OR. passive_scalar) THEN
558	CALL exchange_horiz( q_p, nbgp )
559	IF ( cloud_physics .AND. microphysics_seifert ) THEN
560	CALL exchange_horiz( qr_p, nbgp )
561	CALL exchange_horiz( nr_p, nbgp )
562	ENDIF
563	ENDIF
564	IF ( cloud_droplets ) THEN
565	CALL exchange_horiz( ql, nbgp )
566	CALL exchange_horiz( ql_c, nbgp )
567	CALL exchange_horiz( ql_v, nbgp )
568	CALL exchange_horiz( ql_vp, nbgp )
569	ENDIF
570	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
571	THEN
572	CALL exchange_horiz( diss, nbgp )
573	ENDIF
574
575	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
576	on_device = .FALSE. ! to be removed after complete porting
577	ELSE ! of ghost point exchange
578	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
579	ENDIF
580
581	sendrecv_in_background = .FALSE.
582
583	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
584
585	ENDIF
586
587	! i_left = nxl+nbgp; i_right = nxr-nbgp
588	! j_south = nys+nbgp; j_north = nyn-nbgp
589	! CALL prognostic_equations_acc
590
591	IF ( background_communication ) THEN
592	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
593	#if defined( __parallel )
594	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
595	#endif
596	send_receive = 'al'
597	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
598	ENDIF
599
600	ENDIF
601
602	!
603	!-- Particle transport/physics with the Lagrangian particle model
604	!-- (only once during intermediate steps, because it uses an Euler-step)
605	!-- ### particle model should be moved before prognostic_equations, in order
606	!-- to regard droplet interactions directly
607	IF ( particle_advection .AND. &
608	simulated_time >= particle_advection_start .AND. &
609	intermediate_timestep_count == 1 ) THEN
610	CALL lpm
611	first_call_lpm = .FALSE.
612	ENDIF
613
614	!
615	!-- Interaction of droplets with temperature and specific humidity.
616	!-- Droplet condensation and evaporation is calculated within
617	!-- advec_particles.
618	IF ( cloud_droplets .AND. &
619	intermediate_timestep_count == intermediate_timestep_count_max )&
620	THEN
621	CALL interaction_droplets_ptq
622	ENDIF
623
624	!
625	!-- Exchange of ghost points (lateral boundary conditions)
626	IF ( .NOT. background_communication ) THEN
627
628	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
629
630	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
631	on_device = .TRUE. ! to be removed after complete porting
632	ELSE ! of ghost point exchange
633	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
634	ENDIF
635
636	CALL exchange_horiz( u_p, nbgp )
637	CALL exchange_horiz( v_p, nbgp )
638	CALL exchange_horiz( w_p, nbgp )
639	CALL exchange_horiz( pt_p, nbgp )
640	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
641	IF ( ocean ) THEN
642	CALL exchange_horiz( sa_p, nbgp )
643	CALL exchange_horiz( rho, nbgp )
644	CALL exchange_horiz( prho, nbgp )
645	ENDIF
646	IF (humidity .OR. passive_scalar) THEN
647	CALL exchange_horiz( q_p, nbgp )
648	IF ( cloud_physics .AND. microphysics_seifert ) THEN
649	CALL exchange_horiz( qr_p, nbgp )
650	CALL exchange_horiz( nr_p, nbgp )
651	ENDIF
652	ENDIF
653	IF ( cloud_droplets ) THEN
654	CALL exchange_horiz( ql, nbgp )
655	CALL exchange_horiz( ql_c, nbgp )
656	CALL exchange_horiz( ql_v, nbgp )
657	CALL exchange_horiz( ql_vp, nbgp )
658	ENDIF
659	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
660	THEN
661	CALL exchange_horiz( diss, nbgp )
662	ENDIF
663
664	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
665	on_device = .FALSE. ! to be removed after complete porting
666	ELSE ! of ghost point exchange
667	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
668	ENDIF
669
670	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
671
672	ENDIF
673
674	!
675	!-- Boundary conditions for the prognostic quantities (except of the
676	!-- velocities at the outflow in case of a non-cyclic lateral wall)
677	CALL boundary_conds
678
679	!
680	!-- Swap the time levels in preparation for the next time step.
681	CALL swap_timelevel
682
683	IF ( nested_run ) THEN
684
685	CALL cpu_log( log_point(60), 'nesting', 'start' )
686	!
687	!-- Domain nesting. The data transfer subroutines pmci_server_datatrans
688	!-- and pmci_client_datatatrans are called inside the wrapper
689	!-- subroutine pmci_datatrans according to the control parameters
690	!-- nesting_mode and nesting_datatransfer_mode.
691	!-- TO_DO: why is nesting_mode given as a parameter here?
692	CALL pmci_datatrans( nesting_mode )
693
694	IF ( nesting_mode == 'two-way' ) THEN
695	!
696	!-- Exchange_horiz is needed for all server-domains after the
697	!-- anterpolation
698	CALL exchange_horiz( u, nbgp )
699	CALL exchange_horiz( v, nbgp )
700	CALL exchange_horiz( w, nbgp )
701	CALL exchange_horiz( pt, nbgp )
702	IF ( humidity .OR. passive_scalar ) THEN
703	CALL exchange_horiz( q, nbgp )
704	ENDIF
705	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
706	ENDIF
707	!
708	!-- Correct the w top-BC in nest domains to ensure mass conservation.
709	!-- This action must never be done for the root domain.
710	IF ( nest_domain ) THEN
711	CALL pmci_ensure_nest_mass_conservation
712	ENDIF
713
714	CALL cpu_log( log_point(60), 'nesting', 'stop' )
715
716	ENDIF
717
718	!
719	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
720	!-- when a sloping surface is used
721	IF ( sloping_surface ) THEN
722	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
723	pt_slope_offset
724	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
725	pt_slope_offset
726	ENDIF
727
728	!
729	!-- Impose a turbulent inflow using the recycling method
730	IF ( turbulent_inflow ) CALL inflow_turbulence
731
732	!
733	!-- Impose a random perturbation on the horizontal velocity field
734	IF ( create_disturbances .AND. &
735	( call_psolver_at_all_substeps .AND. &
736	intermediate_timestep_count == intermediate_timestep_count_max )&
737	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
738	intermediate_timestep_count == 1 ) ) &
739	THEN
740	time_disturb = time_disturb + dt_3d
741	IF ( time_disturb >= dt_disturb ) THEN
742	!$acc update host( u, v )
743	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
744	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
745	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
746	CALL disturb_field( nzb_u_inner, tend, u )
747	CALL disturb_field( nzb_v_inner, tend, v )
748	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
749	!
750	!-- Runs with a non-cyclic lateral wall need perturbations
751	!-- near the inflow throughout the whole simulation
752	dist_range = 1
753	CALL disturb_field( nzb_u_inner, tend, u )
754	CALL disturb_field( nzb_v_inner, tend, v )
755	dist_range = 0
756	ENDIF
757	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
758	!$acc update device( u, v )
759	time_disturb = time_disturb - dt_disturb
760	ENDIF
761	ENDIF
762
763	!
764	!-- Reduce the velocity divergence via the equation for perturbation
765	!-- pressure.
766	IF ( intermediate_timestep_count == 1 .OR. &
767	call_psolver_at_all_substeps ) THEN
768	CALL pres
769	ENDIF
770
771	!
772	!-- If required, compute liquid water content
773	IF ( cloud_physics ) THEN
774	CALL calc_liquid_water_content
775	!$acc update device( ql )
776	ENDIF
777	!
778	!-- If required, compute virtual potential temperature
779	IF ( humidity ) THEN
780	CALL compute_vpt
781	!$acc update device( vpt )
782	ENDIF
783
784	!
785	!-- Compute the diffusion quantities
786	IF ( .NOT. constant_diffusion ) THEN
787
788	!
789	!-- Determine surface fluxes shf and qsws and surface values
790	!-- pt_surface and q_surface in dependence on data from external
791	!-- file LSF_DATA respectively
792	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
793	intermediate_timestep_count == intermediate_timestep_count_max )&
794	THEN
795	CALL ls_forcing_surf ( simulated_time )
796	ENDIF
797
798	!
799	!-- First the vertical fluxes in the surface (constant flux) layer are computed
800	IF ( constant_flux_layer ) THEN
801	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
802	CALL surface_layer_fluxes
803	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
804	ENDIF
805
806	!
807	!-- If required, solve the energy balance for the surface and run soil
808	!-- model
809	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
810
811	CALL cpu_log( log_point(54), 'land_surface', 'start' )
812	CALL lsm_energy_balance
813	CALL lsm_soil_model
814	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
815	ENDIF
816	!
817	!-- Compute the diffusion coefficients
818	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
819	IF ( .NOT. humidity ) THEN
820	IF ( ocean ) THEN
821	CALL diffusivities( prho, prho_reference )
822	ELSE
823	CALL diffusivities( pt, pt_reference )
824	ENDIF
825	ELSE
826	CALL diffusivities( vpt, pt_reference )
827	ENDIF
828	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
829
830	ENDIF
831
832	!
833	!-- If required, calculate radiative fluxes and heating rates
834	IF ( radiation .AND. intermediate_timestep_count &
835	== intermediate_timestep_count_max .AND. simulated_time > &
836	skip_time_do_radiation ) THEN
837
838	time_radiation = time_radiation + dt_3d
839
840	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
841	THEN
842
843	CALL cpu_log( log_point(50), 'radiation', 'start' )
844
845	IF ( .NOT. force_radiation_call ) THEN
846	time_radiation = time_radiation - dt_radiation
847	ENDIF
848
849	IF ( radiation_scheme == 'clear-sky' ) THEN
850	CALL radiation_clearsky
851	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
852	CALL radiation_rrtmg
853	ENDIF
854
855	CALL cpu_log( log_point(50), 'radiation', 'stop' )
856	ENDIF
857	ENDIF
858
859	ENDDO ! Intermediate step loop
860
861	!
862	!-- Increase simulation time and output times
863	nr_timesteps_this_run = nr_timesteps_this_run + 1
864	current_timestep_number = current_timestep_number + 1
865	simulated_time = simulated_time + dt_3d
866	simulated_time_chr = time_to_string( simulated_time )
867	time_since_reference_point = simulated_time - coupling_start_time
868
869	IF ( simulated_time >= skip_time_data_output_av ) THEN
870	time_do_av = time_do_av + dt_3d
871	ENDIF
872	IF ( simulated_time >= skip_time_do2d_xy ) THEN
873	time_do2d_xy = time_do2d_xy + dt_3d
874	ENDIF
875	IF ( simulated_time >= skip_time_do2d_xz ) THEN
876	time_do2d_xz = time_do2d_xz + dt_3d
877	ENDIF
878	IF ( simulated_time >= skip_time_do2d_yz ) THEN
879	time_do2d_yz = time_do2d_yz + dt_3d
880	ENDIF
881	IF ( simulated_time >= skip_time_do3d ) THEN
882	time_do3d = time_do3d + dt_3d
883	ENDIF
884	DO mid = 1, masks
885	IF ( simulated_time >= skip_time_domask(mid) ) THEN
886	time_domask(mid)= time_domask(mid) + dt_3d
887	ENDIF
888	ENDDO
889	time_dvrp = time_dvrp + dt_3d
890	IF ( simulated_time >= skip_time_dosp ) THEN
891	time_dosp = time_dosp + dt_3d
892	ENDIF
893	time_dots = time_dots + dt_3d
894	IF ( .NOT. first_call_lpm ) THEN
895	time_dopts = time_dopts + dt_3d
896	ENDIF
897	IF ( simulated_time >= skip_time_dopr ) THEN
898	time_dopr = time_dopr + dt_3d
899	ENDIF
900	time_dopr_listing = time_dopr_listing + dt_3d
901	time_run_control = time_run_control + dt_3d
902
903	!
904	!-- Data exchange between coupled models
905	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
906	time_coupling = time_coupling + dt_3d
907
908	!
909	!-- In case of model termination initiated by the local model
910	!-- (terminate_coupled > 0), the coupler must be skipped because it would
911	!-- cause an MPI intercomminucation hang.
912	!-- If necessary, the coupler will be called at the beginning of the
913	!-- next restart run.
914	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
915	CALL surface_coupler
916	time_coupling = time_coupling - dt_coupling
917	ENDDO
918	ENDIF
919
920	!
921	!-- Execute user-defined actions
922	CALL user_actions( 'after_integration' )
923
924	!
925	!-- If Galilei transformation is used, determine the distance that the
926	!-- model has moved so far
927	IF ( galilei_transformation ) THEN
928	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
929	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
930	ENDIF
931
932	!
933	!-- Check, if restart is necessary (because cpu-time is expiring or
934	!-- because it is forced by user) and set stop flag
935	!-- This call is skipped if the remote model has already initiated a restart.
936	IF ( .NOT. terminate_run ) CALL check_for_restart
937
938	!
939	!-- Carry out statistical analysis and output at the requested output times.
940	!-- The MOD function is used for calculating the output time counters (like
941	!-- time_dopr) in order to regard a possible decrease of the output time
942	!-- interval in case of restart runs
943
944	!
945	!-- Set a flag indicating that so far no statistics have been created
946	!-- for this time step
947	flow_statistics_called = .FALSE.
948
949	!
950	!-- If required, call flow_statistics for averaging in time
951	IF ( averaging_interval_pr /= 0.0_wp .AND. &
952	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
953	simulated_time >= skip_time_dopr ) THEN
954	time_dopr_av = time_dopr_av + dt_3d
955	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
956	do_sum = .TRUE.
957	time_dopr_av = MOD( time_dopr_av, &
958	MAX( dt_averaging_input_pr, dt_3d ) )
959	ENDIF
960	ENDIF
961	IF ( do_sum ) CALL flow_statistics
962
963	!
964	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
965	IF ( averaging_interval /= 0.0_wp .AND. &
966	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
967	simulated_time >= skip_time_data_output_av ) &
968	THEN
969	time_do_sla = time_do_sla + dt_3d
970	IF ( time_do_sla >= dt_averaging_input ) THEN
971	CALL sum_up_3d_data
972	average_count_3d = average_count_3d + 1
973	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
974	ENDIF
975	ENDIF
976
977	!
978	!-- Calculate spectra for time averaging
979	IF ( averaging_interval_sp /= 0.0_wp .AND. &
980	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
981	simulated_time >= skip_time_dosp ) THEN
982	time_dosp_av = time_dosp_av + dt_3d
983	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
984	CALL calc_spectra
985	time_dosp_av = MOD( time_dosp_av, &
986	MAX( dt_averaging_input_pr, dt_3d ) )
987	ENDIF
988	ENDIF
989
990	!
991	!-- Computation and output of run control parameters.
992	!-- This is also done whenever perturbations have been imposed
993	IF ( time_run_control >= dt_run_control .OR. &
994	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
995	THEN
996	CALL run_control
997	IF ( time_run_control >= dt_run_control ) THEN
998	time_run_control = MOD( time_run_control, &
999	MAX( dt_run_control, dt_3d ) )
1000	ENDIF
1001	ENDIF
1002
1003	!
1004	!-- Profile output (ASCII) on file
1005	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1006	CALL print_1d
1007	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1008	dt_3d ) )
1009	ENDIF
1010
1011	!
1012	!-- Graphic output for PROFIL
1013	IF ( time_dopr >= dt_dopr ) THEN
1014	IF ( dopr_n /= 0 ) CALL data_output_profiles
1015	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1016	time_dopr_av = 0.0_wp ! due to averaging (see above)
1017	ENDIF
1018
1019	!
1020	!-- Graphic output for time series
1021	IF ( time_dots >= dt_dots ) THEN
1022	CALL data_output_tseries
1023	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1024	ENDIF
1025
1026	!
1027	!-- Output of spectra (formatted for use with PROFIL), in case of no
1028	!-- time averaging, spectra has to be calculated before
1029	IF ( time_dosp >= dt_dosp ) THEN
1030	IF ( average_count_sp == 0 ) CALL calc_spectra
1031	CALL data_output_spectra
1032	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1033	ENDIF
1034
1035	!
1036	!-- 2d-data output (cross-sections)
1037	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1038	CALL data_output_2d( 'xy', 0 )
1039	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1040	ENDIF
1041	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1042	CALL data_output_2d( 'xz', 0 )
1043	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1044	ENDIF
1045	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1046	CALL data_output_2d( 'yz', 0 )
1047	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1048	ENDIF
1049
1050	!
1051	!-- 3d-data output (volume data)
1052	IF ( time_do3d >= dt_do3d ) THEN
1053	CALL data_output_3d( 0 )
1054	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1055	ENDIF
1056
1057	!
1058	!-- Masked data output
1059	DO mid = 1, masks
1060	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1061	CALL data_output_mask( 0 )
1062	time_domask(mid) = MOD( time_domask(mid), &
1063	MAX( dt_domask(mid), dt_3d ) )
1064	ENDIF
1065	ENDDO
1066
1067	!
1068	!-- Output of time-averaged 2d/3d/masked data
1069	IF ( time_do_av >= dt_data_output_av ) THEN
1070	CALL average_3d_data
1071	CALL data_output_2d( 'xy', 1 )
1072	CALL data_output_2d( 'xz', 1 )
1073	CALL data_output_2d( 'yz', 1 )
1074	CALL data_output_3d( 1 )
1075	DO mid = 1, masks
1076	CALL data_output_mask( 1 )
1077	ENDDO
1078	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1079	ENDIF
1080
1081	!
1082	!-- Output of particle time series
1083	IF ( particle_advection ) THEN
1084	IF ( time_dopts >= dt_dopts .OR. &
1085	( simulated_time >= particle_advection_start .AND. &
1086	first_call_lpm ) ) THEN
1087	CALL data_output_ptseries
1088	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1089	ENDIF
1090	ENDIF
1091
1092	!
1093	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1094	#if defined( __dvrp_graphics )
1095	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1096	#endif
1097	IF ( time_dvrp >= dt_dvrp ) THEN
1098	CALL data_output_dvrp
1099	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1100	ENDIF
1101	#if defined( __dvrp_graphics )
1102	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1103	#endif
1104
1105	!
1106	!-- If required, set the heat flux for the next time step at a random value
1107	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
1108
1109	!
1110	!-- Execute user-defined actions
1111	CALL user_actions( 'after_timestep' )
1112
1113	!
1114	!-- Output elapsed simulated time in form of a progress bar on stdout
1115	IF ( myid == 0 ) CALL output_progress_bar
1116
1117	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1118
1119
1120	ENDDO ! time loop
1121
1122	IF ( myid == 0 ) CALL finish_progress_bar
1123
1124	#if defined( __dvrp_graphics )
1125	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1126	#endif
1127
1128	CALL location_message( 'finished time-stepping', .TRUE. )
1129
1130	END SUBROUTINE time_integration

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