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source: palm/trunk/SOURCE/time_integration.f90 @ 1851

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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 1851 2016-04-08 13:32:50Z maronga $
26	!
27	! 1849 2016-04-08 11:33:18Z hoffmann
28	! Adapted for modularization of microphysics
29	!
30	! 1833 2016-04-07 14:23:03Z raasch
31	! spectrum renamed spectra_mod, spectra related variables moved to spectra_mod
32	!
33	! 1831 2016-04-07 13:15:51Z hoffmann
34	! turbulence renamed collision_turbulence
35	!
36	! 1822 2016-04-07 07:49:42Z hoffmann
37	! icloud_scheme replaced by microphysics_*
38	!
39	! 1808 2016-04-05 19:44:00Z raasch
40	! output message in case unscheduled radiation calls removed
41	!
42	! 1797 2016-03-21 16:50:28Z raasch
43	! introduction of different datatransfer modes
44	!
45	! 1791 2016-03-11 10:41:25Z raasch
46	! call of pmci_update_new removed
47	!
48	! 1786 2016-03-08 05:49:27Z raasch
49	! +module spectrum
50	!
51	! 1783 2016-03-06 18:36:17Z raasch
52	! switch back of netcdf data format for mask output moved to the mask output
53	! routine
54	!
55	! 1781 2016-03-03 15:12:23Z raasch
56	! some pmc calls removed at the beginning (before timeloop),
57	! pmc initialization moved to the main program
58	!
59	! 1764 2016-02-28 12:45:19Z raasch
60	! PMC_ACTIVE flags removed,
61	! bugfix: nest synchronization after first call of timestep
62	!
63	! 1762 2016-02-25 12:31:13Z hellstea
64	! Introduction of nested domain feature
65	!
66	! 1736 2015-12-04 08:56:33Z raasch
67	! no perturbations added to total domain if energy limit has been set zero
68	!
69	! 1691 2015-10-26 16:17:44Z maronga
70	! Added option for spin-ups without land surface and radiation models. Moved calls
71	! for radiation and lan surface schemes.
72	!
73	! 1682 2015-10-07 23:56:08Z knoop
74	! Code annotations made doxygen readable
75	!
76	! 1671 2015-09-25 03:29:37Z raasch
77	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
78	! for particles
79	!
80	! 1585 2015-04-30 07:05:52Z maronga
81	! Moved call of radiation scheme. Added support for RRTM
82	!
83	! 1551 2015-03-03 14:18:16Z maronga
84	! Added interface for different radiation schemes.
85	!
86	! 1496 2014-12-02 17:25:50Z maronga
87	! Added calls for the land surface model and radiation scheme
88	!
89	! 1402 2014-05-09 14:25:13Z raasch
90	! location messages modified
91	!
92	! 1384 2014-05-02 14:31:06Z raasch
93	! location messages added
94	!
95	! 1380 2014-04-28 12:40:45Z heinze
96	! CALL of nudge_ref added
97	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
98	!
99	! 1365 2014-04-22 15:03:56Z boeske
100	! Reset sums_ls_l to zero at each timestep
101	! +sums_ls_l
102	! Calculation of reference state (previously in subroutine calc_mean_profile)
103
104	! 1342 2014-03-26 17:04:47Z kanani
105	! REAL constants defined as wp-kind
106	!
107	! 1320 2014-03-20 08:40:49Z raasch
108	! ONLY-attribute added to USE-statements,
109	! kind-parameters added to all INTEGER and REAL declaration statements,
110	! kinds are defined in new module kinds,
111	! old module precision_kind is removed,
112	! revision history before 2012 removed,
113	! comment fields (!:) to be used for variable explanations added to
114	! all variable declaration statements
115	! 1318 2014-03-17 13:35:16Z raasch
116	! module interfaces removed
117	!
118	! 1308 2014-03-13 14:58:42Z fricke
119	! +netcdf_data_format_save
120	! For masked data, parallel netcdf output is not tested so far, hence
121	! netcdf_data_format is switched back to non-paralell output.
122	!
123	! 1276 2014-01-15 13:40:41Z heinze
124	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
125	!
126	! 1257 2013-11-08 15:18:40Z raasch
127	! acc-update-host directive for timestep removed
128	!
129	! 1241 2013-10-30 11:36:58Z heinze
130	! Generalize calc_mean_profile for wider use
131	! Determine shf and qsws in dependence on data from LSF_DATA
132	! Determine ug and vg in dependence on data from LSF_DATA
133	! 1221 2013-09-10 08:59:13Z raasch
134	! host update of arrays before timestep is called
135	!
136	! 1179 2013-06-14 05:57:58Z raasch
137	! mean profiles for reference state are only calculated if required,
138	! small bugfix for background communication
139	!
140	! 1171 2013-05-30 11:27:45Z raasch
141	! split of prognostic_equations deactivated (comment lines), for the time being
142	!
143	! 1128 2013-04-12 06:19:32Z raasch
144	! asynchronous transfer of ghost point data realized for acc-optimized version:
145	! prognostic_equations are first called two times for those points required for
146	! the left-right and north-south exchange, respectively, and then for the
147	! remaining points,
148	! those parts requiring global communication moved from prognostic_equations to
149	! here
150	!
151	! 1115 2013-03-26 18:16:16Z hoffmann
152	! calculation of qr and nr is restricted to precipitation
153	!
154	! 1113 2013-03-10 02:48:14Z raasch
155	! GPU-porting of boundary conditions,
156	! openACC directives updated
157	! formal parameter removed from routine boundary_conds
158	!
159	! 1111 2013-03-08 23:54:10Z raasch
160	! +internal timestep counter for cpu statistics added,
161	! openACC directives updated
162	!
163	! 1092 2013-02-02 11:24:22Z raasch
164	! unused variables removed
165	!
166	! 1065 2012-11-22 17:42:36Z hoffmann
167	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
168	!
169	! 1053 2012-11-13 17:11:03Z hoffmann
170	! exchange of ghost points for nr, qr added
171	!
172	! 1036 2012-10-22 13:43:42Z raasch
173	! code put under GPL (PALM 3.9)
174	!
175	! 1019 2012-09-28 06:46:45Z raasch
176	! non-optimized version of prognostic_equations removed
177	!
178	! 1015 2012-09-27 09:23:24Z raasch
179	! +call of prognostic_equations_acc
180	!
181	! 1001 2012-09-13 14:08:46Z raasch
182	! all actions concerning leapfrog- and upstream-spline-scheme removed
183	!
184	! 849 2012-03-15 10:35:09Z raasch
185	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
186	!
187	! 825 2012-02-19 03:03:44Z raasch
188	! wang_collision_kernel renamed wang_kernel
189	!
190	! Revision 1.1 1997/08/11 06:19:04 raasch
191	! Initial revision
192	!
193	!
194	! Description:
195	! ------------
196	!> Integration in time of the model equations, statistical analysis and graphic
197	!> output
198	!------------------------------------------------------------------------------!
199	SUBROUTINE time_integration
200
201
202	USE advec_ws, &
203	ONLY: ws_statistics
204
205	USE arrays_3d, &
206	ONLY: diss, dzu, e, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, &
207	ql, ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, &
208	u, u_p, v, vpt, v_p, w, w_p
209
210	USE calc_mean_profile_mod, &
211	ONLY: calc_mean_profile
212
213	USE control_parameters, &
214	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
215	averaging_interval, averaging_interval_pr, &
216	bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
217	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
218	cloud_physics, constant_flux_layer, constant_heatflux, &
219	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
220	coupling_start_time, current_timestep_number, &
221	disturbance_created, disturbance_energy_limit, dist_range, &
222	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
223	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
224	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
225	dt_dopr_listing, dt_dots, dt_dvrp, dt_run_control, &
226	end_time, first_call_lpm, galilei_transformation, humidity, &
227	intermediate_timestep_count, &
228	intermediate_timestep_count_max, large_scale_forcing, &
229	loop_optimization, lsf_surf, lsf_vert, masks, &
230	microphysics_seifert, mid, nest_domain, &
231	neutral, nr_timesteps_this_run, nudging, &
232	ocean, on_device, passive_scalar, &
233	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
234	run_coupled, simulated_time, simulated_time_chr, &
235	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
236	skip_time_do3d, skip_time_domask, skip_time_dopr, &
237	skip_time_data_output_av, sloping_surface, &
238	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
239	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
240	time_do3d, time_domask, time_dopr, time_dopr_av, &
241	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
242	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
243	time_run_control, time_since_reference_point, &
244	turbulent_inflow, use_initial_profile_as_reference, &
245	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
246	ws_scheme_sca
247
248	USE cpulog, &
249	ONLY: cpu_log, log_point, log_point_s
250
251	USE indices, &
252	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
253	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
254
255	USE interaction_droplets_ptq_mod, &
256	ONLY: interaction_droplets_ptq
257
258	USE kinds
259
260	USE land_surface_model_mod, &
261	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
262	skip_time_do_lsm
263
264	USE ls_forcing_mod, &
265	ONLY: ls_forcing_surf, ls_forcing_vert
266
267	USE microphysics_mod, &
268	ONLY: collision_turbulence
269
270	USE nudge_mod, &
271	ONLY: calc_tnudge, nudge_ref
272
273	USE particle_attributes, &
274	ONLY: particle_advection, particle_advection_start, &
275	use_sgs_for_particles, wang_kernel
276
277	USE pegrid
278
279	USE pmc_interface, &
280	ONLY: client_to_server, nested_run, nesting_mode, &
281	pmci_client_synchronize, pmci_datatrans, &
282	pmci_ensure_nest_mass_conservation, &
283	pmci_server_synchronize, server_to_client
284
285	USE production_e_mod, &
286	ONLY: production_e_init
287
288	USE progress_bar, &
289	ONLY: finish_progress_bar, output_progress_bar
290
291	USE prognostic_equations_mod, &
292	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
293	prognostic_equations_vector
294
295	USE radiation_model_mod, &
296	ONLY: dt_radiation, force_radiation_call, radiation, &
297	radiation_clearsky, radiation_rrtmg, radiation_scheme, &
298	skip_time_do_radiation, time_radiation
299
300	USE spectra_mod, &
301	ONLY: average_count_sp, averaging_interval_sp, calc_spectra, dt_dosp, &
302	skip_time_dosp
303
304	USE statistics, &
305	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
306
307	USE surface_layer_fluxes_mod, &
308	ONLY: surface_layer_fluxes
309
310	USE user_actions_mod, &
311	ONLY: user_actions
312
313	IMPLICIT NONE
314
315	CHARACTER (LEN=9) :: time_to_string !<
316
317	!
318	!-- At the beginning of a simulation determine the time step as well as
319	!-- determine and print out the run control parameters
320	IF ( simulated_time == 0.0_wp ) CALL timestep
321
322	!
323	!-- Synchronize the timestep in case of nested run.
324	!-- The server side must be called first
325	IF ( nested_run ) THEN
326	CALL pmci_server_synchronize
327	CALL pmci_client_synchronize
328	ENDIF
329
330	CALL run_control
331
332	!
333	!-- Data exchange between coupled models in case that a call has been omitted
334	!-- at the end of the previous run of a job chain.
335	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
336	!
337	!-- In case of model termination initiated by the local model the coupler
338	!-- must not be called because this would again cause an MPI hang.
339	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
340	CALL surface_coupler
341	time_coupling = time_coupling - dt_coupling
342	ENDDO
343	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
344	THEN
345	time_coupling = time_since_reference_point
346	ENDIF
347	ENDIF
348
349	#if defined( __dvrp_graphics )
350	!
351	!-- Time measurement with dvrp software
352	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
353	#endif
354
355	CALL location_message( 'start with time-stepping', .TRUE. )
356	!
357	!-- Start of the time loop
358	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
359	.NOT. terminate_run )
360
361	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
362
363	!
364	!-- Determine size of next time step
365	IF ( simulated_time /= 0.0_wp ) THEN
366	CALL timestep
367
368	IF ( nested_run ) THEN
369	!
370	!-- TO_DO: try to give more detailed and meaningful comments here
371	!-- Server side must be called first
372	CALL pmci_server_synchronize
373	CALL pmci_client_synchronize
374	ENDIF
375	ENDIF
376
377
378	!
379	!-- Determine ug, vg and w_subs in dependence on data from external file
380	!-- LSF_DATA
381	IF ( large_scale_forcing .AND. lsf_vert ) THEN
382	CALL ls_forcing_vert ( simulated_time )
383	sums_ls_l = 0.0_wp
384	ENDIF
385
386	!
387	!-- Set pt_init and q_init to the current profiles taken from
388	!-- NUDGING_DATA
389	IF ( nudging ) THEN
390	CALL nudge_ref ( simulated_time )
391	!
392	!-- Store temperature gradient at the top boundary for possible Neumann
393	!-- boundary condition
394	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
395	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
396	ENDIF
397
398	!
399	!-- Execute the user-defined actions
400	CALL user_actions( 'before_timestep' )
401
402	!
403	!-- Start of intermediate step loop
404	intermediate_timestep_count = 0
405	DO WHILE ( intermediate_timestep_count < &
406	intermediate_timestep_count_max )
407
408	intermediate_timestep_count = intermediate_timestep_count + 1
409
410	!
411	!-- Set the steering factors for the prognostic equations which depend
412	!-- on the timestep scheme
413	CALL timestep_scheme_steering
414
415	!
416	!-- Calculate those variables needed in the tendency terms which need
417	!-- global communication
418	IF ( .NOT. use_single_reference_value .AND. &
419	.NOT. use_initial_profile_as_reference ) THEN
420	!
421	!-- Horizontally averaged profiles to be used as reference state in
422	!-- buoyancy terms (WARNING: only the respective last call of
423	!-- calc_mean_profile defines the reference state!)
424	IF ( .NOT. neutral ) THEN
425	CALL calc_mean_profile( pt, 4 )
426	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
427	ENDIF
428	IF ( ocean ) THEN
429	CALL calc_mean_profile( rho, 64 )
430	ref_state(:) = hom(:,1,64,0)
431	ENDIF
432	IF ( humidity ) THEN
433	CALL calc_mean_profile( vpt, 44 )
434	ref_state(:) = hom(:,1,44,0)
435	ENDIF
436
437	ENDIF
438
439	IF ( .NOT. constant_diffusion ) CALL production_e_init
440	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
441	intermediate_timestep_count == 1 ) CALL ws_statistics
442	!
443	!-- In case of nudging calculate current nudging time scale and horizontal
444	!-- means of u, v, pt and q
445	IF ( nudging ) THEN
446	CALL calc_tnudge( simulated_time )
447	CALL calc_mean_profile( u, 1 )
448	CALL calc_mean_profile( v, 2 )
449	CALL calc_mean_profile( pt, 4 )
450	CALL calc_mean_profile( q, 41 )
451	ENDIF
452
453	!
454	!-- Solve the prognostic equations. A fast cache optimized version with
455	!-- only one single loop is used in case of Piascek-Williams advection
456	!-- scheme. NEC vector machines use a different version, because
457	!-- in the other versions a good vectorization is prohibited due to
458	!-- inlining problems.
459	IF ( loop_optimization == 'cache' ) THEN
460	CALL prognostic_equations_cache
461	ELSEIF ( loop_optimization == 'vector' ) THEN
462	CALL prognostic_equations_vector
463	ELSEIF ( loop_optimization == 'acc' ) THEN
464	i_left = nxl; i_right = nxr
465	j_south = nys; j_north = nyn
466	CALL prognostic_equations_acc
467
468	! i_left = nxl; i_right = nxl+nbgp-1
469	! j_south = nys; j_north = nyn
470	! CALL prognostic_equations_acc
471	! i_left = nxr-nbgp+1; i_right = nxr
472	! j_south = nys; j_north = nyn
473	! CALL prognostic_equations_acc
474
475	!
476	!-- Exchange of ghost points (lateral boundary conditions)
477	IF ( background_communication ) THEN
478
479	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
480
481	send_receive = 'lr'
482	sendrecv_in_background = .TRUE.
483	req = 0
484	req_count = 0
485
486	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
487	on_device = .TRUE. ! to be removed after complete porting
488	ELSE ! of ghost point exchange
489	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
490	ENDIF
491
492	CALL exchange_horiz( u_p, nbgp )
493	CALL exchange_horiz( v_p, nbgp )
494	CALL exchange_horiz( w_p, nbgp )
495	CALL exchange_horiz( pt_p, nbgp )
496	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
497	IF ( ocean ) THEN
498	CALL exchange_horiz( sa_p, nbgp )
499	CALL exchange_horiz( rho, nbgp )
500	CALL exchange_horiz( prho, nbgp )
501	ENDIF
502	IF (humidity .OR. passive_scalar) THEN
503	CALL exchange_horiz( q_p, nbgp )
504	IF ( cloud_physics .AND. microphysics_seifert ) THEN
505	CALL exchange_horiz( qr_p, nbgp )
506	CALL exchange_horiz( nr_p, nbgp )
507	ENDIF
508	ENDIF
509	IF ( cloud_droplets ) THEN
510	CALL exchange_horiz( ql, nbgp )
511	CALL exchange_horiz( ql_c, nbgp )
512	CALL exchange_horiz( ql_v, nbgp )
513	CALL exchange_horiz( ql_vp, nbgp )
514	ENDIF
515	IF ( wang_kernel .OR. collision_turbulence .OR. &
516	use_sgs_for_particles ) THEN
517	CALL exchange_horiz( diss, nbgp )
518	ENDIF
519
520	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
521	on_device = .FALSE. ! to be removed after complete porting
522	ELSE ! of ghost point exchange
523	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
524	ENDIF
525
526	sendrecv_in_background = .FALSE.
527
528	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
529
530	ENDIF
531
532	! i_left = nxl+nbgp; i_right = nxr-nbgp
533	! j_south = nys; j_north = nys+nbgp-1
534	! CALL prognostic_equations_acc
535	! i_left = nxl+nbgp; i_right = nxr-nbgp
536	! j_south = nyn-nbgp+1; j_north = nyn
537	! CALL prognostic_equations_acc
538
539	IF ( background_communication ) THEN
540	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
541	#if defined( __parallel )
542	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
543	#endif
544	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
545
546	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
547
548	send_receive = 'ns'
549	sendrecv_in_background = .TRUE.
550	req = 0
551	req_count = 0
552
553	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
554	on_device = .TRUE. ! to be removed after complete porting
555	ELSE ! of ghost point exchange
556	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
557	ENDIF
558
559	CALL exchange_horiz( u_p, nbgp )
560	CALL exchange_horiz( v_p, nbgp )
561	CALL exchange_horiz( w_p, nbgp )
562	CALL exchange_horiz( pt_p, nbgp )
563	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
564	IF ( ocean ) THEN
565	CALL exchange_horiz( sa_p, nbgp )
566	CALL exchange_horiz( rho, nbgp )
567	CALL exchange_horiz( prho, nbgp )
568	ENDIF
569	IF (humidity .OR. passive_scalar) THEN
570	CALL exchange_horiz( q_p, nbgp )
571	IF ( cloud_physics .AND. microphysics_seifert ) THEN
572	CALL exchange_horiz( qr_p, nbgp )
573	CALL exchange_horiz( nr_p, nbgp )
574	ENDIF
575	ENDIF
576	IF ( cloud_droplets ) THEN
577	CALL exchange_horiz( ql, nbgp )
578	CALL exchange_horiz( ql_c, nbgp )
579	CALL exchange_horiz( ql_v, nbgp )
580	CALL exchange_horiz( ql_vp, nbgp )
581	ENDIF
582	IF ( wang_kernel .OR. collision_turbulence .OR. &
583	use_sgs_for_particles ) THEN
584	CALL exchange_horiz( diss, nbgp )
585	ENDIF
586
587	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
588	on_device = .FALSE. ! to be removed after complete porting
589	ELSE ! of ghost point exchange
590	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
591	ENDIF
592
593	sendrecv_in_background = .FALSE.
594
595	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
596
597	ENDIF
598
599	! i_left = nxl+nbgp; i_right = nxr-nbgp
600	! j_south = nys+nbgp; j_north = nyn-nbgp
601	! CALL prognostic_equations_acc
602
603	IF ( background_communication ) THEN
604	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
605	#if defined( __parallel )
606	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
607	#endif
608	send_receive = 'al'
609	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
610	ENDIF
611
612	ENDIF
613
614	!
615	!-- Particle transport/physics with the Lagrangian particle model
616	!-- (only once during intermediate steps, because it uses an Euler-step)
617	!-- ### particle model should be moved before prognostic_equations, in order
618	!-- to regard droplet interactions directly
619	IF ( particle_advection .AND. &
620	simulated_time >= particle_advection_start .AND. &
621	intermediate_timestep_count == 1 ) THEN
622	CALL lpm
623	first_call_lpm = .FALSE.
624	ENDIF
625
626	!
627	!-- Interaction of droplets with temperature and specific humidity.
628	!-- Droplet condensation and evaporation is calculated within
629	!-- advec_particles.
630	IF ( cloud_droplets .AND. &
631	intermediate_timestep_count == intermediate_timestep_count_max )&
632	THEN
633	CALL interaction_droplets_ptq
634	ENDIF
635
636	!
637	!-- Exchange of ghost points (lateral boundary conditions)
638	IF ( .NOT. background_communication ) THEN
639
640	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
641
642	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
643	on_device = .TRUE. ! to be removed after complete porting
644	ELSE ! of ghost point exchange
645	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
646	ENDIF
647
648	CALL exchange_horiz( u_p, nbgp )
649	CALL exchange_horiz( v_p, nbgp )
650	CALL exchange_horiz( w_p, nbgp )
651	CALL exchange_horiz( pt_p, nbgp )
652	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
653	IF ( ocean ) THEN
654	CALL exchange_horiz( sa_p, nbgp )
655	CALL exchange_horiz( rho, nbgp )
656	CALL exchange_horiz( prho, nbgp )
657	ENDIF
658	IF (humidity .OR. passive_scalar) THEN
659	CALL exchange_horiz( q_p, nbgp )
660	IF ( cloud_physics .AND. microphysics_seifert ) THEN
661	CALL exchange_horiz( qr_p, nbgp )
662	CALL exchange_horiz( nr_p, nbgp )
663	ENDIF
664	ENDIF
665	IF ( cloud_droplets ) THEN
666	CALL exchange_horiz( ql, nbgp )
667	CALL exchange_horiz( ql_c, nbgp )
668	CALL exchange_horiz( ql_v, nbgp )
669	CALL exchange_horiz( ql_vp, nbgp )
670	ENDIF
671	IF ( wang_kernel .OR. collision_turbulence .OR. &
672	use_sgs_for_particles ) THEN
673	CALL exchange_horiz( diss, nbgp )
674	ENDIF
675
676	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
677	on_device = .FALSE. ! to be removed after complete porting
678	ELSE ! of ghost point exchange
679	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
680	ENDIF
681
682	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
683
684	ENDIF
685
686	!
687	!-- Boundary conditions for the prognostic quantities (except of the
688	!-- velocities at the outflow in case of a non-cyclic lateral wall)
689	CALL boundary_conds
690
691	!
692	!-- Swap the time levels in preparation for the next time step.
693	CALL swap_timelevel
694
695	IF ( nested_run ) THEN
696
697	CALL cpu_log( log_point(60), 'nesting', 'start' )
698	!
699	!-- Domain nesting. The data transfer subroutines pmci_server_datatrans
700	!-- and pmci_client_datatatrans are called inside the wrapper
701	!-- subroutine pmci_datatrans according to the control parameters
702	!-- nesting_mode and nesting_datatransfer_mode.
703	!-- TO_DO: why is nesting_mode given as a parameter here?
704	CALL pmci_datatrans( nesting_mode )
705
706	IF ( nesting_mode == 'two-way' ) THEN
707	!
708	!-- Exchange_horiz is needed for all server-domains after the
709	!-- anterpolation
710	CALL exchange_horiz( u, nbgp )
711	CALL exchange_horiz( v, nbgp )
712	CALL exchange_horiz( w, nbgp )
713	CALL exchange_horiz( pt, nbgp )
714	IF ( humidity .OR. passive_scalar ) THEN
715	CALL exchange_horiz( q, nbgp )
716	ENDIF
717	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
718	ENDIF
719	!
720	!-- Correct the w top-BC in nest domains to ensure mass conservation.
721	!-- This action must never be done for the root domain.
722	IF ( nest_domain ) THEN
723	CALL pmci_ensure_nest_mass_conservation
724	ENDIF
725
726	CALL cpu_log( log_point(60), 'nesting', 'stop' )
727
728	ENDIF
729
730	!
731	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
732	!-- when a sloping surface is used
733	IF ( sloping_surface ) THEN
734	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
735	pt_slope_offset
736	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
737	pt_slope_offset
738	ENDIF
739
740	!
741	!-- Impose a turbulent inflow using the recycling method
742	IF ( turbulent_inflow ) CALL inflow_turbulence
743
744	!
745	!-- Impose a random perturbation on the horizontal velocity field
746	IF ( create_disturbances .AND. &
747	( call_psolver_at_all_substeps .AND. &
748	intermediate_timestep_count == intermediate_timestep_count_max )&
749	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
750	intermediate_timestep_count == 1 ) ) &
751	THEN
752	time_disturb = time_disturb + dt_3d
753	IF ( time_disturb >= dt_disturb ) THEN
754	!$acc update host( u, v )
755	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
756	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
757	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
758	CALL disturb_field( nzb_u_inner, tend, u )
759	CALL disturb_field( nzb_v_inner, tend, v )
760	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
761	!
762	!-- Runs with a non-cyclic lateral wall need perturbations
763	!-- near the inflow throughout the whole simulation
764	dist_range = 1
765	CALL disturb_field( nzb_u_inner, tend, u )
766	CALL disturb_field( nzb_v_inner, tend, v )
767	dist_range = 0
768	ENDIF
769	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
770	!$acc update device( u, v )
771	time_disturb = time_disturb - dt_disturb
772	ENDIF
773	ENDIF
774
775	!
776	!-- Reduce the velocity divergence via the equation for perturbation
777	!-- pressure.
778	IF ( intermediate_timestep_count == 1 .OR. &
779	call_psolver_at_all_substeps ) THEN
780	CALL pres
781	ENDIF
782
783	!
784	!-- If required, compute liquid water content
785	IF ( cloud_physics ) THEN
786	CALL calc_liquid_water_content
787	!$acc update device( ql )
788	ENDIF
789	!
790	!-- If required, compute virtual potential temperature
791	IF ( humidity ) THEN
792	CALL compute_vpt
793	!$acc update device( vpt )
794	ENDIF
795
796	!
797	!-- Compute the diffusion quantities
798	IF ( .NOT. constant_diffusion ) THEN
799
800	!
801	!-- Determine surface fluxes shf and qsws and surface values
802	!-- pt_surface and q_surface in dependence on data from external
803	!-- file LSF_DATA respectively
804	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
805	intermediate_timestep_count == intermediate_timestep_count_max )&
806	THEN
807	CALL ls_forcing_surf ( simulated_time )
808	ENDIF
809
810	!
811	!-- First the vertical fluxes in the surface (constant flux) layer are computed
812	IF ( constant_flux_layer ) THEN
813	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
814	CALL surface_layer_fluxes
815	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
816	ENDIF
817
818	!
819	!-- If required, solve the energy balance for the surface and run soil
820	!-- model
821	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
822
823	CALL cpu_log( log_point(54), 'land_surface', 'start' )
824	CALL lsm_energy_balance
825	CALL lsm_soil_model
826	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
827	ENDIF
828	!
829	!-- Compute the diffusion coefficients
830	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
831	IF ( .NOT. humidity ) THEN
832	IF ( ocean ) THEN
833	CALL diffusivities( prho, prho_reference )
834	ELSE
835	CALL diffusivities( pt, pt_reference )
836	ENDIF
837	ELSE
838	CALL diffusivities( vpt, pt_reference )
839	ENDIF
840	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
841
842	ENDIF
843
844	!
845	!-- If required, calculate radiative fluxes and heating rates
846	IF ( radiation .AND. intermediate_timestep_count &
847	== intermediate_timestep_count_max .AND. simulated_time > &
848	skip_time_do_radiation ) THEN
849
850	time_radiation = time_radiation + dt_3d
851
852	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
853	THEN
854
855	CALL cpu_log( log_point(50), 'radiation', 'start' )
856
857	IF ( .NOT. force_radiation_call ) THEN
858	time_radiation = time_radiation - dt_radiation
859	ENDIF
860
861	IF ( radiation_scheme == 'clear-sky' ) THEN
862	CALL radiation_clearsky
863	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
864	CALL radiation_rrtmg
865	ENDIF
866
867	CALL cpu_log( log_point(50), 'radiation', 'stop' )
868	ENDIF
869	ENDIF
870
871	ENDDO ! Intermediate step loop
872
873	!
874	!-- Increase simulation time and output times
875	nr_timesteps_this_run = nr_timesteps_this_run + 1
876	current_timestep_number = current_timestep_number + 1
877	simulated_time = simulated_time + dt_3d
878	simulated_time_chr = time_to_string( simulated_time )
879	time_since_reference_point = simulated_time - coupling_start_time
880
881	IF ( simulated_time >= skip_time_data_output_av ) THEN
882	time_do_av = time_do_av + dt_3d
883	ENDIF
884	IF ( simulated_time >= skip_time_do2d_xy ) THEN
885	time_do2d_xy = time_do2d_xy + dt_3d
886	ENDIF
887	IF ( simulated_time >= skip_time_do2d_xz ) THEN
888	time_do2d_xz = time_do2d_xz + dt_3d
889	ENDIF
890	IF ( simulated_time >= skip_time_do2d_yz ) THEN
891	time_do2d_yz = time_do2d_yz + dt_3d
892	ENDIF
893	IF ( simulated_time >= skip_time_do3d ) THEN
894	time_do3d = time_do3d + dt_3d
895	ENDIF
896	DO mid = 1, masks
897	IF ( simulated_time >= skip_time_domask(mid) ) THEN
898	time_domask(mid)= time_domask(mid) + dt_3d
899	ENDIF
900	ENDDO
901	time_dvrp = time_dvrp + dt_3d
902	IF ( simulated_time >= skip_time_dosp ) THEN
903	time_dosp = time_dosp + dt_3d
904	ENDIF
905	time_dots = time_dots + dt_3d
906	IF ( .NOT. first_call_lpm ) THEN
907	time_dopts = time_dopts + dt_3d
908	ENDIF
909	IF ( simulated_time >= skip_time_dopr ) THEN
910	time_dopr = time_dopr + dt_3d
911	ENDIF
912	time_dopr_listing = time_dopr_listing + dt_3d
913	time_run_control = time_run_control + dt_3d
914
915	!
916	!-- Data exchange between coupled models
917	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
918	time_coupling = time_coupling + dt_3d
919
920	!
921	!-- In case of model termination initiated by the local model
922	!-- (terminate_coupled > 0), the coupler must be skipped because it would
923	!-- cause an MPI intercomminucation hang.
924	!-- If necessary, the coupler will be called at the beginning of the
925	!-- next restart run.
926	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
927	CALL surface_coupler
928	time_coupling = time_coupling - dt_coupling
929	ENDDO
930	ENDIF
931
932	!
933	!-- Execute user-defined actions
934	CALL user_actions( 'after_integration' )
935
936	!
937	!-- If Galilei transformation is used, determine the distance that the
938	!-- model has moved so far
939	IF ( galilei_transformation ) THEN
940	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
941	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
942	ENDIF
943
944	!
945	!-- Check, if restart is necessary (because cpu-time is expiring or
946	!-- because it is forced by user) and set stop flag
947	!-- This call is skipped if the remote model has already initiated a restart.
948	IF ( .NOT. terminate_run ) CALL check_for_restart
949
950	!
951	!-- Carry out statistical analysis and output at the requested output times.
952	!-- The MOD function is used for calculating the output time counters (like
953	!-- time_dopr) in order to regard a possible decrease of the output time
954	!-- interval in case of restart runs
955
956	!
957	!-- Set a flag indicating that so far no statistics have been created
958	!-- for this time step
959	flow_statistics_called = .FALSE.
960
961	!
962	!-- If required, call flow_statistics for averaging in time
963	IF ( averaging_interval_pr /= 0.0_wp .AND. &
964	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
965	simulated_time >= skip_time_dopr ) THEN
966	time_dopr_av = time_dopr_av + dt_3d
967	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
968	do_sum = .TRUE.
969	time_dopr_av = MOD( time_dopr_av, &
970	MAX( dt_averaging_input_pr, dt_3d ) )
971	ENDIF
972	ENDIF
973	IF ( do_sum ) CALL flow_statistics
974
975	!
976	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
977	IF ( averaging_interval /= 0.0_wp .AND. &
978	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
979	simulated_time >= skip_time_data_output_av ) &
980	THEN
981	time_do_sla = time_do_sla + dt_3d
982	IF ( time_do_sla >= dt_averaging_input ) THEN
983	CALL sum_up_3d_data
984	average_count_3d = average_count_3d + 1
985	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
986	ENDIF
987	ENDIF
988
989	!
990	!-- Calculate spectra for time averaging
991	IF ( averaging_interval_sp /= 0.0_wp .AND. &
992	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
993	simulated_time >= skip_time_dosp ) THEN
994	time_dosp_av = time_dosp_av + dt_3d
995	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
996	CALL calc_spectra
997	time_dosp_av = MOD( time_dosp_av, &
998	MAX( dt_averaging_input_pr, dt_3d ) )
999	ENDIF
1000	ENDIF
1001
1002	!
1003	!-- Computation and output of run control parameters.
1004	!-- This is also done whenever perturbations have been imposed
1005	IF ( time_run_control >= dt_run_control .OR. &
1006	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
1007	THEN
1008	CALL run_control
1009	IF ( time_run_control >= dt_run_control ) THEN
1010	time_run_control = MOD( time_run_control, &
1011	MAX( dt_run_control, dt_3d ) )
1012	ENDIF
1013	ENDIF
1014
1015	!
1016	!-- Profile output (ASCII) on file
1017	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1018	CALL print_1d
1019	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1020	dt_3d ) )
1021	ENDIF
1022
1023	!
1024	!-- Graphic output for PROFIL
1025	IF ( time_dopr >= dt_dopr ) THEN
1026	IF ( dopr_n /= 0 ) CALL data_output_profiles
1027	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1028	time_dopr_av = 0.0_wp ! due to averaging (see above)
1029	ENDIF
1030
1031	!
1032	!-- Graphic output for time series
1033	IF ( time_dots >= dt_dots ) THEN
1034	CALL data_output_tseries
1035	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1036	ENDIF
1037
1038	!
1039	!-- Output of spectra (formatted for use with PROFIL), in case of no
1040	!-- time averaging, spectra has to be calculated before
1041	IF ( time_dosp >= dt_dosp ) THEN
1042	IF ( average_count_sp == 0 ) CALL calc_spectra
1043	CALL data_output_spectra
1044	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1045	ENDIF
1046
1047	!
1048	!-- 2d-data output (cross-sections)
1049	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1050	CALL data_output_2d( 'xy', 0 )
1051	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1052	ENDIF
1053	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1054	CALL data_output_2d( 'xz', 0 )
1055	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1056	ENDIF
1057	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1058	CALL data_output_2d( 'yz', 0 )
1059	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1060	ENDIF
1061
1062	!
1063	!-- 3d-data output (volume data)
1064	IF ( time_do3d >= dt_do3d ) THEN
1065	CALL data_output_3d( 0 )
1066	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1067	ENDIF
1068
1069	!
1070	!-- Masked data output
1071	DO mid = 1, masks
1072	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1073	CALL data_output_mask( 0 )
1074	time_domask(mid) = MOD( time_domask(mid), &
1075	MAX( dt_domask(mid), dt_3d ) )
1076	ENDIF
1077	ENDDO
1078
1079	!
1080	!-- Output of time-averaged 2d/3d/masked data
1081	IF ( time_do_av >= dt_data_output_av ) THEN
1082	CALL average_3d_data
1083	CALL data_output_2d( 'xy', 1 )
1084	CALL data_output_2d( 'xz', 1 )
1085	CALL data_output_2d( 'yz', 1 )
1086	CALL data_output_3d( 1 )
1087	DO mid = 1, masks
1088	CALL data_output_mask( 1 )
1089	ENDDO
1090	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1091	ENDIF
1092
1093	!
1094	!-- Output of particle time series
1095	IF ( particle_advection ) THEN
1096	IF ( time_dopts >= dt_dopts .OR. &
1097	( simulated_time >= particle_advection_start .AND. &
1098	first_call_lpm ) ) THEN
1099	CALL data_output_ptseries
1100	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1101	ENDIF
1102	ENDIF
1103
1104	!
1105	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1106	#if defined( __dvrp_graphics )
1107	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1108	#endif
1109	IF ( time_dvrp >= dt_dvrp ) THEN
1110	CALL data_output_dvrp
1111	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1112	ENDIF
1113	#if defined( __dvrp_graphics )
1114	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1115	#endif
1116
1117	!
1118	!-- If required, set the heat flux for the next time step at a random value
1119	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
1120
1121	!
1122	!-- Execute user-defined actions
1123	CALL user_actions( 'after_timestep' )
1124
1125	!
1126	!-- Output elapsed simulated time in form of a progress bar on stdout
1127	IF ( myid == 0 ) CALL output_progress_bar
1128
1129	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1130
1131
1132	ENDDO ! time loop
1133
1134	IF ( myid == 0 ) CALL finish_progress_bar
1135
1136	#if defined( __dvrp_graphics )
1137	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1138	#endif
1139
1140	CALL location_message( 'finished time-stepping', .TRUE. )
1141
1142	END SUBROUTINE time_integration

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