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source: palm/trunk/SOURCE/time_integration.f90 @ 1798

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1	!> @file time_integration.f90
2	!--------------------------------------------------------------------------------!
3	! This file is part of PALM.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the terms
6	! of the GNU General Public License as published by the Free Software Foundation,
7	! either version 3 of the License, or (at your option) any later version.
8	!
9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12	!
13	! You should have received a copy of the GNU General Public License along with
14	! PALM. If not, see <http://www.gnu.org/licenses/>.
15	!
16	! Copyright 1997-2015 Leibniz Universitaet Hannover
17	!--------------------------------------------------------------------------------!
18	!
19	! Current revisions:
20	! ------------------
21	!
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: time_integration.f90 1798 2016-03-21 16:59:17Z raasch $
26	!
27	! 1797 2016-03-21 16:50:28Z raasch
28	! introduction of different datatransfer modes
29	!
30	! 1791 2016-03-11 10:41:25Z raasch
31	! call of pmci_update_new removed
32	!
33	! 1786 2016-03-08 05:49:27Z raasch
34	! +module spectrum
35	!
36	! 1783 2016-03-06 18:36:17Z raasch
37	! switch back of netcdf data format for mask output moved to the mask output
38	! routine
39	!
40	! 1781 2016-03-03 15:12:23Z raasch
41	! some pmc calls removed at the beginning (before timeloop),
42	! pmc initialization moved to the main program
43	!
44	! 1764 2016-02-28 12:45:19Z raasch
45	! PMC_ACTIVE flags removed,
46	! bugfix: nest synchronization after first call of timestep
47	!
48	! 1762 2016-02-25 12:31:13Z hellstea
49	! Introduction of nested domain feature
50	!
51	! 1736 2015-12-04 08:56:33Z raasch
52	! no perturbations added to total domain if energy limit has been set zero
53	!
54	! 1691 2015-10-26 16:17:44Z maronga
55	! Added option for spin-ups without land surface and radiation models. Moved calls
56	! for radiation and lan surface schemes.
57	!
58	! 1682 2015-10-07 23:56:08Z knoop
59	! Code annotations made doxygen readable
60	!
61	! 1671 2015-09-25 03:29:37Z raasch
62	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
63	! for particles
64	!
65	! 1585 2015-04-30 07:05:52Z maronga
66	! Moved call of radiation scheme. Added support for RRTM
67	!
68	! 1551 2015-03-03 14:18:16Z maronga
69	! Added interface for different radiation schemes.
70	!
71	! 1496 2014-12-02 17:25:50Z maronga
72	! Added calls for the land surface model and radiation scheme
73	!
74	! 1402 2014-05-09 14:25:13Z raasch
75	! location messages modified
76	!
77	! 1384 2014-05-02 14:31:06Z raasch
78	! location messages added
79	!
80	! 1380 2014-04-28 12:40:45Z heinze
81	! CALL of nudge_ref added
82	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
83	!
84	! 1365 2014-04-22 15:03:56Z boeske
85	! Reset sums_ls_l to zero at each timestep
86	! +sums_ls_l
87	! Calculation of reference state (previously in subroutine calc_mean_profile)
88
89	! 1342 2014-03-26 17:04:47Z kanani
90	! REAL constants defined as wp-kind
91	!
92	! 1320 2014-03-20 08:40:49Z raasch
93	! ONLY-attribute added to USE-statements,
94	! kind-parameters added to all INTEGER and REAL declaration statements,
95	! kinds are defined in new module kinds,
96	! old module precision_kind is removed,
97	! revision history before 2012 removed,
98	! comment fields (!:) to be used for variable explanations added to
99	! all variable declaration statements
100	! 1318 2014-03-17 13:35:16Z raasch
101	! module interfaces removed
102	!
103	! 1308 2014-03-13 14:58:42Z fricke
104	! +netcdf_data_format_save
105	! For masked data, parallel netcdf output is not tested so far, hence
106	! netcdf_data_format is switched back to non-paralell output.
107	!
108	! 1276 2014-01-15 13:40:41Z heinze
109	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
110	!
111	! 1257 2013-11-08 15:18:40Z raasch
112	! acc-update-host directive for timestep removed
113	!
114	! 1241 2013-10-30 11:36:58Z heinze
115	! Generalize calc_mean_profile for wider use
116	! Determine shf and qsws in dependence on data from LSF_DATA
117	! Determine ug and vg in dependence on data from LSF_DATA
118	! 1221 2013-09-10 08:59:13Z raasch
119	! host update of arrays before timestep is called
120	!
121	! 1179 2013-06-14 05:57:58Z raasch
122	! mean profiles for reference state are only calculated if required,
123	! small bugfix for background communication
124	!
125	! 1171 2013-05-30 11:27:45Z raasch
126	! split of prognostic_equations deactivated (comment lines), for the time being
127	!
128	! 1128 2013-04-12 06:19:32Z raasch
129	! asynchronous transfer of ghost point data realized for acc-optimized version:
130	! prognostic_equations are first called two times for those points required for
131	! the left-right and north-south exchange, respectively, and then for the
132	! remaining points,
133	! those parts requiring global communication moved from prognostic_equations to
134	! here
135	!
136	! 1115 2013-03-26 18:16:16Z hoffmann
137	! calculation of qr and nr is restricted to precipitation
138	!
139	! 1113 2013-03-10 02:48:14Z raasch
140	! GPU-porting of boundary conditions,
141	! openACC directives updated
142	! formal parameter removed from routine boundary_conds
143	!
144	! 1111 2013-03-08 23:54:10Z raasch
145	! +internal timestep counter for cpu statistics added,
146	! openACC directives updated
147	!
148	! 1092 2013-02-02 11:24:22Z raasch
149	! unused variables removed
150	!
151	! 1065 2012-11-22 17:42:36Z hoffmann
152	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
153	!
154	! 1053 2012-11-13 17:11:03Z hoffmann
155	! exchange of ghost points for nr, qr added
156	!
157	! 1036 2012-10-22 13:43:42Z raasch
158	! code put under GPL (PALM 3.9)
159	!
160	! 1019 2012-09-28 06:46:45Z raasch
161	! non-optimized version of prognostic_equations removed
162	!
163	! 1015 2012-09-27 09:23:24Z raasch
164	! +call of prognostic_equations_acc
165	!
166	! 1001 2012-09-13 14:08:46Z raasch
167	! all actions concerning leapfrog- and upstream-spline-scheme removed
168	!
169	! 849 2012-03-15 10:35:09Z raasch
170	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
171	!
172	! 825 2012-02-19 03:03:44Z raasch
173	! wang_collision_kernel renamed wang_kernel
174	!
175	! Revision 1.1 1997/08/11 06:19:04 raasch
176	! Initial revision
177	!
178	!
179	! Description:
180	! ------------
181	!> Integration in time of the model equations, statistical analysis and graphic
182	!> output
183	!------------------------------------------------------------------------------!
184	SUBROUTINE time_integration
185
186
187	USE advec_ws, &
188	ONLY: ws_statistics
189
190	USE arrays_3d, &
191	ONLY: diss, dzu, e, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, &
192	ql, ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, &
193	u, u_p, v, vpt, v_p, w, w_p
194
195	USE calc_mean_profile_mod, &
196	ONLY: calc_mean_profile
197
198	USE control_parameters, &
199	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
200	average_count_sp, averaging_interval, averaging_interval_pr, &
201	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
202	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
203	cloud_physics, constant_flux_layer, constant_heatflux, &
204	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
205	coupling_start_time, current_timestep_number, &
206	disturbance_created, disturbance_energy_limit, dist_range, &
207	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
208	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
209	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
210	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
211	end_time, first_call_lpm, galilei_transformation, humidity, &
212	icloud_scheme, intermediate_timestep_count, &
213	intermediate_timestep_count_max, large_scale_forcing, &
214	loop_optimization, lsf_surf, lsf_vert, masks, mid, nest_domain, &
215	neutral, nr_timesteps_this_run, nudging, &
216	ocean, on_device, passive_scalar, precipitation, &
217	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
218	run_coupled, simulated_time, simulated_time_chr, &
219	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
220	skip_time_do3d, skip_time_domask, skip_time_dopr, &
221	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
222	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
223	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
224	time_do3d, time_domask, time_dopr, time_dopr_av, &
225	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
226	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
227	time_run_control, time_since_reference_point, &
228	turbulence, &
229	turbulent_inflow, use_initial_profile_as_reference, &
230	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
231	ws_scheme_sca
232
233	USE cpulog, &
234	ONLY: cpu_log, log_point, log_point_s
235
236	USE indices, &
237	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
238	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
239
240	USE interaction_droplets_ptq_mod, &
241	ONLY: interaction_droplets_ptq
242
243	USE kinds
244
245	USE land_surface_model_mod, &
246	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
247	skip_time_do_lsm
248
249	USE ls_forcing_mod, &
250	ONLY: ls_forcing_surf, ls_forcing_vert
251
252	USE nudge_mod, &
253	ONLY: calc_tnudge, nudge_ref
254
255	USE particle_attributes, &
256	ONLY: particle_advection, particle_advection_start, &
257	use_sgs_for_particles, wang_kernel
258
259	USE pegrid
260
261	USE pmc_interface, &
262	ONLY: client_to_server, nested_run, nesting_mode, &
263	pmci_client_synchronize, pmci_datatrans, &
264	pmci_ensure_nest_mass_conservation, &
265	pmci_server_synchronize, server_to_client
266
267	USE production_e_mod, &
268	ONLY: production_e_init
269
270	USE progress_bar, &
271	ONLY: finish_progress_bar, output_progress_bar
272
273	USE prognostic_equations_mod, &
274	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
275	prognostic_equations_vector
276
277	USE radiation_model_mod, &
278	ONLY: dt_radiation, force_radiation_call, radiation, &
279	radiation_clearsky, radiation_rrtmg, radiation_scheme, &
280	skip_time_do_radiation, time_radiation
281
282	USE spectrum, &
283	ONLY: calc_spectra
284
285	USE statistics, &
286	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
287
288	USE surface_layer_fluxes_mod, &
289	ONLY: surface_layer_fluxes
290
291	USE user_actions_mod, &
292	ONLY: user_actions
293
294	IMPLICIT NONE
295
296	CHARACTER (LEN=9) :: time_to_string !<
297
298	!
299	!-- At the beginning of a simulation determine the time step as well as
300	!-- determine and print out the run control parameters
301	IF ( simulated_time == 0.0_wp ) CALL timestep
302
303	!
304	!-- Synchronize the timestep in case of nested run.
305	!-- The server side must be called first
306	IF ( nested_run ) THEN
307	CALL pmci_server_synchronize
308	CALL pmci_client_synchronize
309	ENDIF
310
311	CALL run_control
312
313	!
314	!-- Data exchange between coupled models in case that a call has been omitted
315	!-- at the end of the previous run of a job chain.
316	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
317	!
318	!-- In case of model termination initiated by the local model the coupler
319	!-- must not be called because this would again cause an MPI hang.
320	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
321	CALL surface_coupler
322	time_coupling = time_coupling - dt_coupling
323	ENDDO
324	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
325	THEN
326	time_coupling = time_since_reference_point
327	ENDIF
328	ENDIF
329
330	#if defined( __dvrp_graphics )
331	!
332	!-- Time measurement with dvrp software
333	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
334	#endif
335
336	CALL location_message( 'start with time-stepping', .TRUE. )
337	!
338	!-- Start of the time loop
339	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
340	.NOT. terminate_run )
341
342	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
343
344	!
345	!-- Determine size of next time step
346	IF ( simulated_time /= 0.0_wp ) THEN
347	CALL timestep
348
349	IF ( nested_run ) THEN
350	!
351	!-- TO_DO: try to give more detailed and meaningful comments here
352	!-- Server side must be called first
353	CALL pmci_server_synchronize
354	CALL pmci_client_synchronize
355	ENDIF
356	ENDIF
357
358
359	!
360	!-- Determine ug, vg and w_subs in dependence on data from external file
361	!-- LSF_DATA
362	IF ( large_scale_forcing .AND. lsf_vert ) THEN
363	CALL ls_forcing_vert ( simulated_time )
364	sums_ls_l = 0.0_wp
365	ENDIF
366
367	!
368	!-- Set pt_init and q_init to the current profiles taken from
369	!-- NUDGING_DATA
370	IF ( nudging ) THEN
371	CALL nudge_ref ( simulated_time )
372	!
373	!-- Store temperature gradient at the top boundary for possible Neumann
374	!-- boundary condition
375	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
376	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
377	ENDIF
378
379	!
380	!-- Execute the user-defined actions
381	CALL user_actions( 'before_timestep' )
382
383	!
384	!-- Start of intermediate step loop
385	intermediate_timestep_count = 0
386	DO WHILE ( intermediate_timestep_count < &
387	intermediate_timestep_count_max )
388
389	intermediate_timestep_count = intermediate_timestep_count + 1
390
391	!
392	!-- Set the steering factors for the prognostic equations which depend
393	!-- on the timestep scheme
394	CALL timestep_scheme_steering
395
396	!
397	!-- Calculate those variables needed in the tendency terms which need
398	!-- global communication
399	IF ( .NOT. use_single_reference_value .AND. &
400	.NOT. use_initial_profile_as_reference ) THEN
401	!
402	!-- Horizontally averaged profiles to be used as reference state in
403	!-- buoyancy terms (WARNING: only the respective last call of
404	!-- calc_mean_profile defines the reference state!)
405	IF ( .NOT. neutral ) THEN
406	CALL calc_mean_profile( pt, 4 )
407	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
408	ENDIF
409	IF ( ocean ) THEN
410	CALL calc_mean_profile( rho, 64 )
411	ref_state(:) = hom(:,1,64,0)
412	ENDIF
413	IF ( humidity ) THEN
414	CALL calc_mean_profile( vpt, 44 )
415	ref_state(:) = hom(:,1,44,0)
416	ENDIF
417
418	ENDIF
419
420	IF ( .NOT. constant_diffusion ) CALL production_e_init
421	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
422	intermediate_timestep_count == 1 ) CALL ws_statistics
423	!
424	!-- In case of nudging calculate current nudging time scale and horizontal
425	!-- means of u, v, pt and q
426	IF ( nudging ) THEN
427	CALL calc_tnudge( simulated_time )
428	CALL calc_mean_profile( u, 1 )
429	CALL calc_mean_profile( v, 2 )
430	CALL calc_mean_profile( pt, 4 )
431	CALL calc_mean_profile( q, 41 )
432	ENDIF
433
434	!
435	!-- Solve the prognostic equations. A fast cache optimized version with
436	!-- only one single loop is used in case of Piascek-Williams advection
437	!-- scheme. NEC vector machines use a different version, because
438	!-- in the other versions a good vectorization is prohibited due to
439	!-- inlining problems.
440	IF ( loop_optimization == 'cache' ) THEN
441	CALL prognostic_equations_cache
442	ELSEIF ( loop_optimization == 'vector' ) THEN
443	CALL prognostic_equations_vector
444	ELSEIF ( loop_optimization == 'acc' ) THEN
445	i_left = nxl; i_right = nxr
446	j_south = nys; j_north = nyn
447	CALL prognostic_equations_acc
448
449	! i_left = nxl; i_right = nxl+nbgp-1
450	! j_south = nys; j_north = nyn
451	! CALL prognostic_equations_acc
452	! i_left = nxr-nbgp+1; i_right = nxr
453	! j_south = nys; j_north = nyn
454	! CALL prognostic_equations_acc
455
456	!
457	!-- Exchange of ghost points (lateral boundary conditions)
458	IF ( background_communication ) THEN
459
460	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
461
462	send_receive = 'lr'
463	sendrecv_in_background = .TRUE.
464	req = 0
465	req_count = 0
466
467	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
468	on_device = .TRUE. ! to be removed after complete porting
469	ELSE ! of ghost point exchange
470	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
471	ENDIF
472
473	CALL exchange_horiz( u_p, nbgp )
474	CALL exchange_horiz( v_p, nbgp )
475	CALL exchange_horiz( w_p, nbgp )
476	CALL exchange_horiz( pt_p, nbgp )
477	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
478	IF ( ocean ) THEN
479	CALL exchange_horiz( sa_p, nbgp )
480	CALL exchange_horiz( rho, nbgp )
481	CALL exchange_horiz( prho, nbgp )
482	ENDIF
483	IF (humidity .OR. passive_scalar) THEN
484	CALL exchange_horiz( q_p, nbgp )
485	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
486	CALL exchange_horiz( qr_p, nbgp )
487	CALL exchange_horiz( nr_p, nbgp )
488	ENDIF
489	ENDIF
490	IF ( cloud_droplets ) THEN
491	CALL exchange_horiz( ql, nbgp )
492	CALL exchange_horiz( ql_c, nbgp )
493	CALL exchange_horiz( ql_v, nbgp )
494	CALL exchange_horiz( ql_vp, nbgp )
495	ENDIF
496	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
497	THEN
498	CALL exchange_horiz( diss, nbgp )
499	ENDIF
500
501	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
502	on_device = .FALSE. ! to be removed after complete porting
503	ELSE ! of ghost point exchange
504	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
505	ENDIF
506
507	sendrecv_in_background = .FALSE.
508
509	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
510
511	ENDIF
512
513	! i_left = nxl+nbgp; i_right = nxr-nbgp
514	! j_south = nys; j_north = nys+nbgp-1
515	! CALL prognostic_equations_acc
516	! i_left = nxl+nbgp; i_right = nxr-nbgp
517	! j_south = nyn-nbgp+1; j_north = nyn
518	! CALL prognostic_equations_acc
519
520	IF ( background_communication ) THEN
521	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
522	#if defined( __parallel )
523	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
524	#endif
525	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
526
527	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
528
529	send_receive = 'ns'
530	sendrecv_in_background = .TRUE.
531	req = 0
532	req_count = 0
533
534	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
535	on_device = .TRUE. ! to be removed after complete porting
536	ELSE ! of ghost point exchange
537	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
538	ENDIF
539
540	CALL exchange_horiz( u_p, nbgp )
541	CALL exchange_horiz( v_p, nbgp )
542	CALL exchange_horiz( w_p, nbgp )
543	CALL exchange_horiz( pt_p, nbgp )
544	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
545	IF ( ocean ) THEN
546	CALL exchange_horiz( sa_p, nbgp )
547	CALL exchange_horiz( rho, nbgp )
548	CALL exchange_horiz( prho, nbgp )
549	ENDIF
550	IF (humidity .OR. passive_scalar) THEN
551	CALL exchange_horiz( q_p, nbgp )
552	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
553	CALL exchange_horiz( qr_p, nbgp )
554	CALL exchange_horiz( nr_p, nbgp )
555	ENDIF
556	ENDIF
557	IF ( cloud_droplets ) THEN
558	CALL exchange_horiz( ql, nbgp )
559	CALL exchange_horiz( ql_c, nbgp )
560	CALL exchange_horiz( ql_v, nbgp )
561	CALL exchange_horiz( ql_vp, nbgp )
562	ENDIF
563	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
564	THEN
565	CALL exchange_horiz( diss, nbgp )
566	ENDIF
567
568	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
569	on_device = .FALSE. ! to be removed after complete porting
570	ELSE ! of ghost point exchange
571	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
572	ENDIF
573
574	sendrecv_in_background = .FALSE.
575
576	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
577
578	ENDIF
579
580	! i_left = nxl+nbgp; i_right = nxr-nbgp
581	! j_south = nys+nbgp; j_north = nyn-nbgp
582	! CALL prognostic_equations_acc
583
584	IF ( background_communication ) THEN
585	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
586	#if defined( __parallel )
587	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
588	#endif
589	send_receive = 'al'
590	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
591	ENDIF
592
593	ENDIF
594
595	!
596	!-- Particle transport/physics with the Lagrangian particle model
597	!-- (only once during intermediate steps, because it uses an Euler-step)
598	!-- ### particle model should be moved before prognostic_equations, in order
599	!-- to regard droplet interactions directly
600	IF ( particle_advection .AND. &
601	simulated_time >= particle_advection_start .AND. &
602	intermediate_timestep_count == 1 ) THEN
603	CALL lpm
604	first_call_lpm = .FALSE.
605	ENDIF
606
607	!
608	!-- Interaction of droplets with temperature and specific humidity.
609	!-- Droplet condensation and evaporation is calculated within
610	!-- advec_particles.
611	IF ( cloud_droplets .AND. &
612	intermediate_timestep_count == intermediate_timestep_count_max )&
613	THEN
614	CALL interaction_droplets_ptq
615	ENDIF
616
617	!
618	!-- Exchange of ghost points (lateral boundary conditions)
619	IF ( .NOT. background_communication ) THEN
620
621	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
622
623	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
624	on_device = .TRUE. ! to be removed after complete porting
625	ELSE ! of ghost point exchange
626	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
627	ENDIF
628
629	CALL exchange_horiz( u_p, nbgp )
630	CALL exchange_horiz( v_p, nbgp )
631	CALL exchange_horiz( w_p, nbgp )
632	CALL exchange_horiz( pt_p, nbgp )
633	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
634	IF ( ocean ) THEN
635	CALL exchange_horiz( sa_p, nbgp )
636	CALL exchange_horiz( rho, nbgp )
637	CALL exchange_horiz( prho, nbgp )
638	ENDIF
639	IF (humidity .OR. passive_scalar) THEN
640	CALL exchange_horiz( q_p, nbgp )
641	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
642	precipitation ) THEN
643	CALL exchange_horiz( qr_p, nbgp )
644	CALL exchange_horiz( nr_p, nbgp )
645	ENDIF
646	ENDIF
647	IF ( cloud_droplets ) THEN
648	CALL exchange_horiz( ql, nbgp )
649	CALL exchange_horiz( ql_c, nbgp )
650	CALL exchange_horiz( ql_v, nbgp )
651	CALL exchange_horiz( ql_vp, nbgp )
652	ENDIF
653	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
654	THEN
655	CALL exchange_horiz( diss, nbgp )
656	ENDIF
657
658	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
659	on_device = .FALSE. ! to be removed after complete porting
660	ELSE ! of ghost point exchange
661	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
662	ENDIF
663
664	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
665
666	ENDIF
667
668	!
669	!-- Boundary conditions for the prognostic quantities (except of the
670	!-- velocities at the outflow in case of a non-cyclic lateral wall)
671	CALL boundary_conds
672
673	!
674	!-- Swap the time levels in preparation for the next time step.
675	CALL swap_timelevel
676
677	IF ( nested_run ) THEN
678
679	CALL cpu_log( log_point(60), 'nesting', 'start' )
680	!
681	!-- Domain nesting. The data transfer subroutines pmci_server_datatrans
682	!-- and pmci_client_datatatrans are called inside the wrapper
683	!-- subroutine pmci_datatrans according to the control parameters
684	!-- nesting_mode and nesting_datatransfer_mode.
685	!-- TO_DO: why is nesting_mode given as a parameter here?
686	CALL pmci_datatrans( nesting_mode )
687
688	IF ( nesting_mode == 'two-way' ) THEN
689	!
690	!-- Exchange_horiz is needed for all server-domains after the
691	!-- anterpolation
692	CALL exchange_horiz( u, nbgp )
693	CALL exchange_horiz( v, nbgp )
694	CALL exchange_horiz( w, nbgp )
695	CALL exchange_horiz( pt, nbgp )
696	IF ( humidity .OR. passive_scalar ) THEN
697	CALL exchange_horiz( q, nbgp )
698	ENDIF
699	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
700	ENDIF
701	!
702	!-- Correct the w top-BC in nest domains to ensure mass conservation.
703	!-- This action must never be done for the root domain.
704	IF ( nest_domain ) THEN
705	CALL pmci_ensure_nest_mass_conservation
706	ENDIF
707
708	CALL cpu_log( log_point(60), 'nesting', 'stop' )
709
710	ENDIF
711
712	!
713	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
714	!-- when a sloping surface is used
715	IF ( sloping_surface ) THEN
716	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
717	pt_slope_offset
718	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
719	pt_slope_offset
720	ENDIF
721
722	!
723	!-- Impose a turbulent inflow using the recycling method
724	IF ( turbulent_inflow ) CALL inflow_turbulence
725
726	!
727	!-- Impose a random perturbation on the horizontal velocity field
728	IF ( create_disturbances .AND. &
729	( call_psolver_at_all_substeps .AND. &
730	intermediate_timestep_count == intermediate_timestep_count_max )&
731	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
732	intermediate_timestep_count == 1 ) ) &
733	THEN
734	time_disturb = time_disturb + dt_3d
735	IF ( time_disturb >= dt_disturb ) THEN
736	!$acc update host( u, v )
737	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
738	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
739	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
740	CALL disturb_field( nzb_u_inner, tend, u )
741	CALL disturb_field( nzb_v_inner, tend, v )
742	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
743	!
744	!-- Runs with a non-cyclic lateral wall need perturbations
745	!-- near the inflow throughout the whole simulation
746	dist_range = 1
747	CALL disturb_field( nzb_u_inner, tend, u )
748	CALL disturb_field( nzb_v_inner, tend, v )
749	dist_range = 0
750	ENDIF
751	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
752	!$acc update device( u, v )
753	time_disturb = time_disturb - dt_disturb
754	ENDIF
755	ENDIF
756
757	!
758	!-- Reduce the velocity divergence via the equation for perturbation
759	!-- pressure.
760	IF ( intermediate_timestep_count == 1 .OR. &
761	call_psolver_at_all_substeps ) THEN
762	CALL pres
763	ENDIF
764
765	!
766	!-- If required, compute liquid water content
767	IF ( cloud_physics ) THEN
768	CALL calc_liquid_water_content
769	!$acc update device( ql )
770	ENDIF
771	!
772	!-- If required, compute virtual potential temperature
773	IF ( humidity ) THEN
774	CALL compute_vpt
775	!$acc update device( vpt )
776	ENDIF
777
778	!
779	!-- Compute the diffusion quantities
780	IF ( .NOT. constant_diffusion ) THEN
781
782	!
783	!-- Determine surface fluxes shf and qsws and surface values
784	!-- pt_surface and q_surface in dependence on data from external
785	!-- file LSF_DATA respectively
786	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
787	intermediate_timestep_count == intermediate_timestep_count_max )&
788	THEN
789	CALL ls_forcing_surf ( simulated_time )
790	ENDIF
791
792	!
793	!-- First the vertical fluxes in the surface (constant flux) layer are computed
794	IF ( constant_flux_layer ) THEN
795	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
796	CALL surface_layer_fluxes
797	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
798	ENDIF
799
800	!
801	!-- If required, solve the energy balance for the surface and run soil
802	!-- model
803	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
804
805	CALL cpu_log( log_point(54), 'land_surface', 'start' )
806	CALL lsm_energy_balance
807	CALL lsm_soil_model
808	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
809	ENDIF
810	!
811	!-- Compute the diffusion coefficients
812	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
813	IF ( .NOT. humidity ) THEN
814	IF ( ocean ) THEN
815	CALL diffusivities( prho, prho_reference )
816	ELSE
817	CALL diffusivities( pt, pt_reference )
818	ENDIF
819	ELSE
820	CALL diffusivities( vpt, pt_reference )
821	ENDIF
822	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
823
824	ENDIF
825
826	!
827	!-- If required, calculate radiative fluxes and heating rates
828	IF ( radiation .AND. intermediate_timestep_count &
829	== intermediate_timestep_count_max .AND. simulated_time > &
830	skip_time_do_radiation ) THEN
831
832	time_radiation = time_radiation + dt_3d
833
834	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
835	THEN
836
837	CALL cpu_log( log_point(50), 'radiation', 'start' )
838
839	IF ( .NOT. force_radiation_call ) THEN
840	time_radiation = time_radiation - dt_radiation
841	ELSE
842	WRITE(9,*) "Unscheduled radiation call at ", simulated_time
843	CALL LOCAL_FLUSH ( 9 )
844	ENDIF
845
846	IF ( radiation_scheme == 'clear-sky' ) THEN
847	CALL radiation_clearsky
848	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
849	CALL radiation_rrtmg
850	ENDIF
851
852	CALL cpu_log( log_point(50), 'radiation', 'stop' )
853	ENDIF
854	ENDIF
855
856	ENDDO ! Intermediate step loop
857
858	!
859	!-- Increase simulation time and output times
860	nr_timesteps_this_run = nr_timesteps_this_run + 1
861	current_timestep_number = current_timestep_number + 1
862	simulated_time = simulated_time + dt_3d
863	simulated_time_chr = time_to_string( simulated_time )
864	time_since_reference_point = simulated_time - coupling_start_time
865
866	IF ( simulated_time >= skip_time_data_output_av ) THEN
867	time_do_av = time_do_av + dt_3d
868	ENDIF
869	IF ( simulated_time >= skip_time_do2d_xy ) THEN
870	time_do2d_xy = time_do2d_xy + dt_3d
871	ENDIF
872	IF ( simulated_time >= skip_time_do2d_xz ) THEN
873	time_do2d_xz = time_do2d_xz + dt_3d
874	ENDIF
875	IF ( simulated_time >= skip_time_do2d_yz ) THEN
876	time_do2d_yz = time_do2d_yz + dt_3d
877	ENDIF
878	IF ( simulated_time >= skip_time_do3d ) THEN
879	time_do3d = time_do3d + dt_3d
880	ENDIF
881	DO mid = 1, masks
882	IF ( simulated_time >= skip_time_domask(mid) ) THEN
883	time_domask(mid)= time_domask(mid) + dt_3d
884	ENDIF
885	ENDDO
886	time_dvrp = time_dvrp + dt_3d
887	IF ( simulated_time >= skip_time_dosp ) THEN
888	time_dosp = time_dosp + dt_3d
889	ENDIF
890	time_dots = time_dots + dt_3d
891	IF ( .NOT. first_call_lpm ) THEN
892	time_dopts = time_dopts + dt_3d
893	ENDIF
894	IF ( simulated_time >= skip_time_dopr ) THEN
895	time_dopr = time_dopr + dt_3d
896	ENDIF
897	time_dopr_listing = time_dopr_listing + dt_3d
898	time_run_control = time_run_control + dt_3d
899
900	!
901	!-- Data exchange between coupled models
902	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
903	time_coupling = time_coupling + dt_3d
904
905	!
906	!-- In case of model termination initiated by the local model
907	!-- (terminate_coupled > 0), the coupler must be skipped because it would
908	!-- cause an MPI intercomminucation hang.
909	!-- If necessary, the coupler will be called at the beginning of the
910	!-- next restart run.
911	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
912	CALL surface_coupler
913	time_coupling = time_coupling - dt_coupling
914	ENDDO
915	ENDIF
916
917	!
918	!-- Execute user-defined actions
919	CALL user_actions( 'after_integration' )
920
921	!
922	!-- If Galilei transformation is used, determine the distance that the
923	!-- model has moved so far
924	IF ( galilei_transformation ) THEN
925	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
926	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
927	ENDIF
928
929	!
930	!-- Check, if restart is necessary (because cpu-time is expiring or
931	!-- because it is forced by user) and set stop flag
932	!-- This call is skipped if the remote model has already initiated a restart.
933	IF ( .NOT. terminate_run ) CALL check_for_restart
934
935	!
936	!-- Carry out statistical analysis and output at the requested output times.
937	!-- The MOD function is used for calculating the output time counters (like
938	!-- time_dopr) in order to regard a possible decrease of the output time
939	!-- interval in case of restart runs
940
941	!
942	!-- Set a flag indicating that so far no statistics have been created
943	!-- for this time step
944	flow_statistics_called = .FALSE.
945
946	!
947	!-- If required, call flow_statistics for averaging in time
948	IF ( averaging_interval_pr /= 0.0_wp .AND. &
949	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
950	simulated_time >= skip_time_dopr ) THEN
951	time_dopr_av = time_dopr_av + dt_3d
952	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
953	do_sum = .TRUE.
954	time_dopr_av = MOD( time_dopr_av, &
955	MAX( dt_averaging_input_pr, dt_3d ) )
956	ENDIF
957	ENDIF
958	IF ( do_sum ) CALL flow_statistics
959
960	!
961	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
962	IF ( averaging_interval /= 0.0_wp .AND. &
963	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
964	simulated_time >= skip_time_data_output_av ) &
965	THEN
966	time_do_sla = time_do_sla + dt_3d
967	IF ( time_do_sla >= dt_averaging_input ) THEN
968	CALL sum_up_3d_data
969	average_count_3d = average_count_3d + 1
970	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
971	ENDIF
972	ENDIF
973
974	!
975	!-- Calculate spectra for time averaging
976	IF ( averaging_interval_sp /= 0.0_wp .AND. &
977	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
978	simulated_time >= skip_time_dosp ) THEN
979	time_dosp_av = time_dosp_av + dt_3d
980	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
981	CALL calc_spectra
982	time_dosp_av = MOD( time_dosp_av, &
983	MAX( dt_averaging_input_pr, dt_3d ) )
984	ENDIF
985	ENDIF
986
987	!
988	!-- Computation and output of run control parameters.
989	!-- This is also done whenever perturbations have been imposed
990	IF ( time_run_control >= dt_run_control .OR. &
991	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
992	THEN
993	CALL run_control
994	IF ( time_run_control >= dt_run_control ) THEN
995	time_run_control = MOD( time_run_control, &
996	MAX( dt_run_control, dt_3d ) )
997	ENDIF
998	ENDIF
999
1000	!
1001	!-- Profile output (ASCII) on file
1002	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1003	CALL print_1d
1004	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1005	dt_3d ) )
1006	ENDIF
1007
1008	!
1009	!-- Graphic output for PROFIL
1010	IF ( time_dopr >= dt_dopr ) THEN
1011	IF ( dopr_n /= 0 ) CALL data_output_profiles
1012	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1013	time_dopr_av = 0.0_wp ! due to averaging (see above)
1014	ENDIF
1015
1016	!
1017	!-- Graphic output for time series
1018	IF ( time_dots >= dt_dots ) THEN
1019	CALL data_output_tseries
1020	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1021	ENDIF
1022
1023	!
1024	!-- Output of spectra (formatted for use with PROFIL), in case of no
1025	!-- time averaging, spectra has to be calculated before
1026	IF ( time_dosp >= dt_dosp ) THEN
1027	IF ( average_count_sp == 0 ) CALL calc_spectra
1028	CALL data_output_spectra
1029	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1030	ENDIF
1031
1032	!
1033	!-- 2d-data output (cross-sections)
1034	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1035	CALL data_output_2d( 'xy', 0 )
1036	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1037	ENDIF
1038	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1039	CALL data_output_2d( 'xz', 0 )
1040	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1041	ENDIF
1042	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1043	CALL data_output_2d( 'yz', 0 )
1044	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1045	ENDIF
1046
1047	!
1048	!-- 3d-data output (volume data)
1049	IF ( time_do3d >= dt_do3d ) THEN
1050	CALL data_output_3d( 0 )
1051	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1052	ENDIF
1053
1054	!
1055	!-- Masked data output
1056	DO mid = 1, masks
1057	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1058	CALL data_output_mask( 0 )
1059	time_domask(mid) = MOD( time_domask(mid), &
1060	MAX( dt_domask(mid), dt_3d ) )
1061	ENDIF
1062	ENDDO
1063
1064	!
1065	!-- Output of time-averaged 2d/3d/masked data
1066	IF ( time_do_av >= dt_data_output_av ) THEN
1067	CALL average_3d_data
1068	CALL data_output_2d( 'xy', 1 )
1069	CALL data_output_2d( 'xz', 1 )
1070	CALL data_output_2d( 'yz', 1 )
1071	CALL data_output_3d( 1 )
1072	DO mid = 1, masks
1073	CALL data_output_mask( 1 )
1074	ENDDO
1075	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1076	ENDIF
1077
1078	!
1079	!-- Output of particle time series
1080	IF ( particle_advection ) THEN
1081	IF ( time_dopts >= dt_dopts .OR. &
1082	( simulated_time >= particle_advection_start .AND. &
1083	first_call_lpm ) ) THEN
1084	CALL data_output_ptseries
1085	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1086	ENDIF
1087	ENDIF
1088
1089	!
1090	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1091	#if defined( __dvrp_graphics )
1092	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1093	#endif
1094	IF ( time_dvrp >= dt_dvrp ) THEN
1095	CALL data_output_dvrp
1096	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1097	ENDIF
1098	#if defined( __dvrp_graphics )
1099	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1100	#endif
1101
1102	!
1103	!-- If required, set the heat flux for the next time step at a random value
1104	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
1105
1106	!
1107	!-- Execute user-defined actions
1108	CALL user_actions( 'after_timestep' )
1109
1110	!
1111	!-- Output elapsed simulated time in form of a progress bar on stdout
1112	IF ( myid == 0 ) CALL output_progress_bar
1113
1114	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1115
1116
1117	ENDDO ! time loop
1118
1119	IF ( myid == 0 ) CALL finish_progress_bar
1120
1121	#if defined( __dvrp_graphics )
1122	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1123	#endif
1124
1125	CALL location_message( 'finished time-stepping', .TRUE. )
1126
1127	END SUBROUTINE time_integration

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