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source: palm/trunk/SOURCE/time_integration.f90 @ 1833

Last change on this file since 1833 was 1833, checked in by raasch, 8 years ago
spectrum renamed spactra_par and further modularized, POINTER-attributes added in coupler-routines to avoid gfortran error messages
Property svn:keywords set to `Id`
File size: 43.8 KB

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1	!> @file time_integration.f90
2	!--------------------------------------------------------------------------------!
3	! This file is part of PALM.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the terms
6	! of the GNU General Public License as published by the Free Software Foundation,
7	! either version 3 of the License, or (at your option) any later version.
8	!
9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12	!
13	! You should have received a copy of the GNU General Public License along with
14	! PALM. If not, see <http://www.gnu.org/licenses/>.
15	!
16	! Copyright 1997-2016 Leibniz Universitaet Hannover
17	!--------------------------------------------------------------------------------!
18	!
19	! Current revisions:
20	! ------------------
21	! spectrum renamed spectra_mod, spectra related variables moved to spectra_mod
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: time_integration.f90 1833 2016-04-07 14:23:03Z raasch $
26	!
27	! 1831 2016-04-07 13:15:51Z hoffmann
28	! turbulence renamed collision_turbulence
29	!
30	! 1822 2016-04-07 07:49:42Z hoffmann
31	! icloud_scheme replaced by microphysics_*
32	!
33	! 1808 2016-04-05 19:44:00Z raasch
34	! output message in case unscheduled radiation calls removed
35	!
36	! 1797 2016-03-21 16:50:28Z raasch
37	! introduction of different datatransfer modes
38	!
39	! 1791 2016-03-11 10:41:25Z raasch
40	! call of pmci_update_new removed
41	!
42	! 1786 2016-03-08 05:49:27Z raasch
43	! +module spectrum
44	!
45	! 1783 2016-03-06 18:36:17Z raasch
46	! switch back of netcdf data format for mask output moved to the mask output
47	! routine
48	!
49	! 1781 2016-03-03 15:12:23Z raasch
50	! some pmc calls removed at the beginning (before timeloop),
51	! pmc initialization moved to the main program
52	!
53	! 1764 2016-02-28 12:45:19Z raasch
54	! PMC_ACTIVE flags removed,
55	! bugfix: nest synchronization after first call of timestep
56	!
57	! 1762 2016-02-25 12:31:13Z hellstea
58	! Introduction of nested domain feature
59	!
60	! 1736 2015-12-04 08:56:33Z raasch
61	! no perturbations added to total domain if energy limit has been set zero
62	!
63	! 1691 2015-10-26 16:17:44Z maronga
64	! Added option for spin-ups without land surface and radiation models. Moved calls
65	! for radiation and lan surface schemes.
66	!
67	! 1682 2015-10-07 23:56:08Z knoop
68	! Code annotations made doxygen readable
69	!
70	! 1671 2015-09-25 03:29:37Z raasch
71	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
72	! for particles
73	!
74	! 1585 2015-04-30 07:05:52Z maronga
75	! Moved call of radiation scheme. Added support for RRTM
76	!
77	! 1551 2015-03-03 14:18:16Z maronga
78	! Added interface for different radiation schemes.
79	!
80	! 1496 2014-12-02 17:25:50Z maronga
81	! Added calls for the land surface model and radiation scheme
82	!
83	! 1402 2014-05-09 14:25:13Z raasch
84	! location messages modified
85	!
86	! 1384 2014-05-02 14:31:06Z raasch
87	! location messages added
88	!
89	! 1380 2014-04-28 12:40:45Z heinze
90	! CALL of nudge_ref added
91	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
92	!
93	! 1365 2014-04-22 15:03:56Z boeske
94	! Reset sums_ls_l to zero at each timestep
95	! +sums_ls_l
96	! Calculation of reference state (previously in subroutine calc_mean_profile)
97
98	! 1342 2014-03-26 17:04:47Z kanani
99	! REAL constants defined as wp-kind
100	!
101	! 1320 2014-03-20 08:40:49Z raasch
102	! ONLY-attribute added to USE-statements,
103	! kind-parameters added to all INTEGER and REAL declaration statements,
104	! kinds are defined in new module kinds,
105	! old module precision_kind is removed,
106	! revision history before 2012 removed,
107	! comment fields (!:) to be used for variable explanations added to
108	! all variable declaration statements
109	! 1318 2014-03-17 13:35:16Z raasch
110	! module interfaces removed
111	!
112	! 1308 2014-03-13 14:58:42Z fricke
113	! +netcdf_data_format_save
114	! For masked data, parallel netcdf output is not tested so far, hence
115	! netcdf_data_format is switched back to non-paralell output.
116	!
117	! 1276 2014-01-15 13:40:41Z heinze
118	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
119	!
120	! 1257 2013-11-08 15:18:40Z raasch
121	! acc-update-host directive for timestep removed
122	!
123	! 1241 2013-10-30 11:36:58Z heinze
124	! Generalize calc_mean_profile for wider use
125	! Determine shf and qsws in dependence on data from LSF_DATA
126	! Determine ug and vg in dependence on data from LSF_DATA
127	! 1221 2013-09-10 08:59:13Z raasch
128	! host update of arrays before timestep is called
129	!
130	! 1179 2013-06-14 05:57:58Z raasch
131	! mean profiles for reference state are only calculated if required,
132	! small bugfix for background communication
133	!
134	! 1171 2013-05-30 11:27:45Z raasch
135	! split of prognostic_equations deactivated (comment lines), for the time being
136	!
137	! 1128 2013-04-12 06:19:32Z raasch
138	! asynchronous transfer of ghost point data realized for acc-optimized version:
139	! prognostic_equations are first called two times for those points required for
140	! the left-right and north-south exchange, respectively, and then for the
141	! remaining points,
142	! those parts requiring global communication moved from prognostic_equations to
143	! here
144	!
145	! 1115 2013-03-26 18:16:16Z hoffmann
146	! calculation of qr and nr is restricted to precipitation
147	!
148	! 1113 2013-03-10 02:48:14Z raasch
149	! GPU-porting of boundary conditions,
150	! openACC directives updated
151	! formal parameter removed from routine boundary_conds
152	!
153	! 1111 2013-03-08 23:54:10Z raasch
154	! +internal timestep counter for cpu statistics added,
155	! openACC directives updated
156	!
157	! 1092 2013-02-02 11:24:22Z raasch
158	! unused variables removed
159	!
160	! 1065 2012-11-22 17:42:36Z hoffmann
161	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
162	!
163	! 1053 2012-11-13 17:11:03Z hoffmann
164	! exchange of ghost points for nr, qr added
165	!
166	! 1036 2012-10-22 13:43:42Z raasch
167	! code put under GPL (PALM 3.9)
168	!
169	! 1019 2012-09-28 06:46:45Z raasch
170	! non-optimized version of prognostic_equations removed
171	!
172	! 1015 2012-09-27 09:23:24Z raasch
173	! +call of prognostic_equations_acc
174	!
175	! 1001 2012-09-13 14:08:46Z raasch
176	! all actions concerning leapfrog- and upstream-spline-scheme removed
177	!
178	! 849 2012-03-15 10:35:09Z raasch
179	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
180	!
181	! 825 2012-02-19 03:03:44Z raasch
182	! wang_collision_kernel renamed wang_kernel
183	!
184	! Revision 1.1 1997/08/11 06:19:04 raasch
185	! Initial revision
186	!
187	!
188	! Description:
189	! ------------
190	!> Integration in time of the model equations, statistical analysis and graphic
191	!> output
192	!------------------------------------------------------------------------------!
193	SUBROUTINE time_integration
194
195
196	USE advec_ws, &
197	ONLY: ws_statistics
198
199	USE arrays_3d, &
200	ONLY: diss, dzu, e, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, &
201	ql, ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, &
202	u, u_p, v, vpt, v_p, w, w_p
203
204	USE calc_mean_profile_mod, &
205	ONLY: calc_mean_profile
206
207	USE control_parameters, &
208	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
209	averaging_interval, averaging_interval_pr, &
210	bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
211	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
212	cloud_physics, constant_flux_layer, constant_heatflux, &
213	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
214	coupling_start_time, current_timestep_number, &
215	disturbance_created, disturbance_energy_limit, dist_range, &
216	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
217	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
218	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
219	dt_dopr_listing, dt_dots, dt_dvrp, dt_run_control, &
220	end_time, first_call_lpm, galilei_transformation, humidity, &
221	intermediate_timestep_count, &
222	intermediate_timestep_count_max, large_scale_forcing, &
223	loop_optimization, lsf_surf, lsf_vert, masks, &
224	microphysics_seifert, mid, nest_domain, &
225	neutral, nr_timesteps_this_run, nudging, &
226	ocean, on_device, passive_scalar, &
227	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
228	run_coupled, simulated_time, simulated_time_chr, &
229	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
230	skip_time_do3d, skip_time_domask, skip_time_dopr, &
231	skip_time_data_output_av, sloping_surface, &
232	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
233	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
234	time_do3d, time_domask, time_dopr, time_dopr_av, &
235	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
236	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
237	time_run_control, time_since_reference_point, &
238	turbulent_inflow, use_initial_profile_as_reference, &
239	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
240	ws_scheme_sca
241
242	USE cloud_parameters, &
243	ONLY: collision_turbulence
244
245	USE cpulog, &
246	ONLY: cpu_log, log_point, log_point_s
247
248	USE indices, &
249	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
250	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
251
252	USE interaction_droplets_ptq_mod, &
253	ONLY: interaction_droplets_ptq
254
255	USE kinds
256
257	USE land_surface_model_mod, &
258	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
259	skip_time_do_lsm
260
261	USE ls_forcing_mod, &
262	ONLY: ls_forcing_surf, ls_forcing_vert
263
264	USE nudge_mod, &
265	ONLY: calc_tnudge, nudge_ref
266
267	USE particle_attributes, &
268	ONLY: particle_advection, particle_advection_start, &
269	use_sgs_for_particles, wang_kernel
270
271	USE pegrid
272
273	USE pmc_interface, &
274	ONLY: client_to_server, nested_run, nesting_mode, &
275	pmci_client_synchronize, pmci_datatrans, &
276	pmci_ensure_nest_mass_conservation, &
277	pmci_server_synchronize, server_to_client
278
279	USE production_e_mod, &
280	ONLY: production_e_init
281
282	USE progress_bar, &
283	ONLY: finish_progress_bar, output_progress_bar
284
285	USE prognostic_equations_mod, &
286	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
287	prognostic_equations_vector
288
289	USE radiation_model_mod, &
290	ONLY: dt_radiation, force_radiation_call, radiation, &
291	radiation_clearsky, radiation_rrtmg, radiation_scheme, &
292	skip_time_do_radiation, time_radiation
293
294	USE spectra_mod, &
295	ONLY: average_count_sp, averaging_interval_sp, calc_spectra, dt_dosp, &
296	skip_time_dosp
297
298	USE statistics, &
299	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
300
301	USE surface_layer_fluxes_mod, &
302	ONLY: surface_layer_fluxes
303
304	USE user_actions_mod, &
305	ONLY: user_actions
306
307	IMPLICIT NONE
308
309	CHARACTER (LEN=9) :: time_to_string !<
310
311	!
312	!-- At the beginning of a simulation determine the time step as well as
313	!-- determine and print out the run control parameters
314	IF ( simulated_time == 0.0_wp ) CALL timestep
315
316	!
317	!-- Synchronize the timestep in case of nested run.
318	!-- The server side must be called first
319	IF ( nested_run ) THEN
320	CALL pmci_server_synchronize
321	CALL pmci_client_synchronize
322	ENDIF
323
324	CALL run_control
325
326	!
327	!-- Data exchange between coupled models in case that a call has been omitted
328	!-- at the end of the previous run of a job chain.
329	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
330	!
331	!-- In case of model termination initiated by the local model the coupler
332	!-- must not be called because this would again cause an MPI hang.
333	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
334	CALL surface_coupler
335	time_coupling = time_coupling - dt_coupling
336	ENDDO
337	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
338	THEN
339	time_coupling = time_since_reference_point
340	ENDIF
341	ENDIF
342
343	#if defined( __dvrp_graphics )
344	!
345	!-- Time measurement with dvrp software
346	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
347	#endif
348
349	CALL location_message( 'start with time-stepping', .TRUE. )
350	!
351	!-- Start of the time loop
352	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
353	.NOT. terminate_run )
354
355	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
356
357	!
358	!-- Determine size of next time step
359	IF ( simulated_time /= 0.0_wp ) THEN
360	CALL timestep
361
362	IF ( nested_run ) THEN
363	!
364	!-- TO_DO: try to give more detailed and meaningful comments here
365	!-- Server side must be called first
366	CALL pmci_server_synchronize
367	CALL pmci_client_synchronize
368	ENDIF
369	ENDIF
370
371
372	!
373	!-- Determine ug, vg and w_subs in dependence on data from external file
374	!-- LSF_DATA
375	IF ( large_scale_forcing .AND. lsf_vert ) THEN
376	CALL ls_forcing_vert ( simulated_time )
377	sums_ls_l = 0.0_wp
378	ENDIF
379
380	!
381	!-- Set pt_init and q_init to the current profiles taken from
382	!-- NUDGING_DATA
383	IF ( nudging ) THEN
384	CALL nudge_ref ( simulated_time )
385	!
386	!-- Store temperature gradient at the top boundary for possible Neumann
387	!-- boundary condition
388	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
389	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
390	ENDIF
391
392	!
393	!-- Execute the user-defined actions
394	CALL user_actions( 'before_timestep' )
395
396	!
397	!-- Start of intermediate step loop
398	intermediate_timestep_count = 0
399	DO WHILE ( intermediate_timestep_count < &
400	intermediate_timestep_count_max )
401
402	intermediate_timestep_count = intermediate_timestep_count + 1
403
404	!
405	!-- Set the steering factors for the prognostic equations which depend
406	!-- on the timestep scheme
407	CALL timestep_scheme_steering
408
409	!
410	!-- Calculate those variables needed in the tendency terms which need
411	!-- global communication
412	IF ( .NOT. use_single_reference_value .AND. &
413	.NOT. use_initial_profile_as_reference ) THEN
414	!
415	!-- Horizontally averaged profiles to be used as reference state in
416	!-- buoyancy terms (WARNING: only the respective last call of
417	!-- calc_mean_profile defines the reference state!)
418	IF ( .NOT. neutral ) THEN
419	CALL calc_mean_profile( pt, 4 )
420	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
421	ENDIF
422	IF ( ocean ) THEN
423	CALL calc_mean_profile( rho, 64 )
424	ref_state(:) = hom(:,1,64,0)
425	ENDIF
426	IF ( humidity ) THEN
427	CALL calc_mean_profile( vpt, 44 )
428	ref_state(:) = hom(:,1,44,0)
429	ENDIF
430
431	ENDIF
432
433	IF ( .NOT. constant_diffusion ) CALL production_e_init
434	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
435	intermediate_timestep_count == 1 ) CALL ws_statistics
436	!
437	!-- In case of nudging calculate current nudging time scale and horizontal
438	!-- means of u, v, pt and q
439	IF ( nudging ) THEN
440	CALL calc_tnudge( simulated_time )
441	CALL calc_mean_profile( u, 1 )
442	CALL calc_mean_profile( v, 2 )
443	CALL calc_mean_profile( pt, 4 )
444	CALL calc_mean_profile( q, 41 )
445	ENDIF
446
447	!
448	!-- Solve the prognostic equations. A fast cache optimized version with
449	!-- only one single loop is used in case of Piascek-Williams advection
450	!-- scheme. NEC vector machines use a different version, because
451	!-- in the other versions a good vectorization is prohibited due to
452	!-- inlining problems.
453	IF ( loop_optimization == 'cache' ) THEN
454	CALL prognostic_equations_cache
455	ELSEIF ( loop_optimization == 'vector' ) THEN
456	CALL prognostic_equations_vector
457	ELSEIF ( loop_optimization == 'acc' ) THEN
458	i_left = nxl; i_right = nxr
459	j_south = nys; j_north = nyn
460	CALL prognostic_equations_acc
461
462	! i_left = nxl; i_right = nxl+nbgp-1
463	! j_south = nys; j_north = nyn
464	! CALL prognostic_equations_acc
465	! i_left = nxr-nbgp+1; i_right = nxr
466	! j_south = nys; j_north = nyn
467	! CALL prognostic_equations_acc
468
469	!
470	!-- Exchange of ghost points (lateral boundary conditions)
471	IF ( background_communication ) THEN
472
473	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
474
475	send_receive = 'lr'
476	sendrecv_in_background = .TRUE.
477	req = 0
478	req_count = 0
479
480	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
481	on_device = .TRUE. ! to be removed after complete porting
482	ELSE ! of ghost point exchange
483	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
484	ENDIF
485
486	CALL exchange_horiz( u_p, nbgp )
487	CALL exchange_horiz( v_p, nbgp )
488	CALL exchange_horiz( w_p, nbgp )
489	CALL exchange_horiz( pt_p, nbgp )
490	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
491	IF ( ocean ) THEN
492	CALL exchange_horiz( sa_p, nbgp )
493	CALL exchange_horiz( rho, nbgp )
494	CALL exchange_horiz( prho, nbgp )
495	ENDIF
496	IF (humidity .OR. passive_scalar) THEN
497	CALL exchange_horiz( q_p, nbgp )
498	IF ( cloud_physics .AND. microphysics_seifert ) THEN
499	CALL exchange_horiz( qr_p, nbgp )
500	CALL exchange_horiz( nr_p, nbgp )
501	ENDIF
502	ENDIF
503	IF ( cloud_droplets ) THEN
504	CALL exchange_horiz( ql, nbgp )
505	CALL exchange_horiz( ql_c, nbgp )
506	CALL exchange_horiz( ql_v, nbgp )
507	CALL exchange_horiz( ql_vp, nbgp )
508	ENDIF
509	IF ( wang_kernel .OR. collision_turbulence .OR. &
510	use_sgs_for_particles ) THEN
511	CALL exchange_horiz( diss, nbgp )
512	ENDIF
513
514	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
515	on_device = .FALSE. ! to be removed after complete porting
516	ELSE ! of ghost point exchange
517	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
518	ENDIF
519
520	sendrecv_in_background = .FALSE.
521
522	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
523
524	ENDIF
525
526	! i_left = nxl+nbgp; i_right = nxr-nbgp
527	! j_south = nys; j_north = nys+nbgp-1
528	! CALL prognostic_equations_acc
529	! i_left = nxl+nbgp; i_right = nxr-nbgp
530	! j_south = nyn-nbgp+1; j_north = nyn
531	! CALL prognostic_equations_acc
532
533	IF ( background_communication ) THEN
534	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
535	#if defined( __parallel )
536	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
537	#endif
538	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
539
540	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
541
542	send_receive = 'ns'
543	sendrecv_in_background = .TRUE.
544	req = 0
545	req_count = 0
546
547	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
548	on_device = .TRUE. ! to be removed after complete porting
549	ELSE ! of ghost point exchange
550	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
551	ENDIF
552
553	CALL exchange_horiz( u_p, nbgp )
554	CALL exchange_horiz( v_p, nbgp )
555	CALL exchange_horiz( w_p, nbgp )
556	CALL exchange_horiz( pt_p, nbgp )
557	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
558	IF ( ocean ) THEN
559	CALL exchange_horiz( sa_p, nbgp )
560	CALL exchange_horiz( rho, nbgp )
561	CALL exchange_horiz( prho, nbgp )
562	ENDIF
563	IF (humidity .OR. passive_scalar) THEN
564	CALL exchange_horiz( q_p, nbgp )
565	IF ( cloud_physics .AND. microphysics_seifert ) THEN
566	CALL exchange_horiz( qr_p, nbgp )
567	CALL exchange_horiz( nr_p, nbgp )
568	ENDIF
569	ENDIF
570	IF ( cloud_droplets ) THEN
571	CALL exchange_horiz( ql, nbgp )
572	CALL exchange_horiz( ql_c, nbgp )
573	CALL exchange_horiz( ql_v, nbgp )
574	CALL exchange_horiz( ql_vp, nbgp )
575	ENDIF
576	IF ( wang_kernel .OR. collision_turbulence .OR. &
577	use_sgs_for_particles ) THEN
578	CALL exchange_horiz( diss, nbgp )
579	ENDIF
580
581	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
582	on_device = .FALSE. ! to be removed after complete porting
583	ELSE ! of ghost point exchange
584	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
585	ENDIF
586
587	sendrecv_in_background = .FALSE.
588
589	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
590
591	ENDIF
592
593	! i_left = nxl+nbgp; i_right = nxr-nbgp
594	! j_south = nys+nbgp; j_north = nyn-nbgp
595	! CALL prognostic_equations_acc
596
597	IF ( background_communication ) THEN
598	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
599	#if defined( __parallel )
600	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
601	#endif
602	send_receive = 'al'
603	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
604	ENDIF
605
606	ENDIF
607
608	!
609	!-- Particle transport/physics with the Lagrangian particle model
610	!-- (only once during intermediate steps, because it uses an Euler-step)
611	!-- ### particle model should be moved before prognostic_equations, in order
612	!-- to regard droplet interactions directly
613	IF ( particle_advection .AND. &
614	simulated_time >= particle_advection_start .AND. &
615	intermediate_timestep_count == 1 ) THEN
616	CALL lpm
617	first_call_lpm = .FALSE.
618	ENDIF
619
620	!
621	!-- Interaction of droplets with temperature and specific humidity.
622	!-- Droplet condensation and evaporation is calculated within
623	!-- advec_particles.
624	IF ( cloud_droplets .AND. &
625	intermediate_timestep_count == intermediate_timestep_count_max )&
626	THEN
627	CALL interaction_droplets_ptq
628	ENDIF
629
630	!
631	!-- Exchange of ghost points (lateral boundary conditions)
632	IF ( .NOT. background_communication ) THEN
633
634	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
635
636	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
637	on_device = .TRUE. ! to be removed after complete porting
638	ELSE ! of ghost point exchange
639	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
640	ENDIF
641
642	CALL exchange_horiz( u_p, nbgp )
643	CALL exchange_horiz( v_p, nbgp )
644	CALL exchange_horiz( w_p, nbgp )
645	CALL exchange_horiz( pt_p, nbgp )
646	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
647	IF ( ocean ) THEN
648	CALL exchange_horiz( sa_p, nbgp )
649	CALL exchange_horiz( rho, nbgp )
650	CALL exchange_horiz( prho, nbgp )
651	ENDIF
652	IF (humidity .OR. passive_scalar) THEN
653	CALL exchange_horiz( q_p, nbgp )
654	IF ( cloud_physics .AND. microphysics_seifert ) THEN
655	CALL exchange_horiz( qr_p, nbgp )
656	CALL exchange_horiz( nr_p, nbgp )
657	ENDIF
658	ENDIF
659	IF ( cloud_droplets ) THEN
660	CALL exchange_horiz( ql, nbgp )
661	CALL exchange_horiz( ql_c, nbgp )
662	CALL exchange_horiz( ql_v, nbgp )
663	CALL exchange_horiz( ql_vp, nbgp )
664	ENDIF
665	IF ( wang_kernel .OR. collision_turbulence .OR. &
666	use_sgs_for_particles ) THEN
667	CALL exchange_horiz( diss, nbgp )
668	ENDIF
669
670	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
671	on_device = .FALSE. ! to be removed after complete porting
672	ELSE ! of ghost point exchange
673	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
674	ENDIF
675
676	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
677
678	ENDIF
679
680	!
681	!-- Boundary conditions for the prognostic quantities (except of the
682	!-- velocities at the outflow in case of a non-cyclic lateral wall)
683	CALL boundary_conds
684
685	!
686	!-- Swap the time levels in preparation for the next time step.
687	CALL swap_timelevel
688
689	IF ( nested_run ) THEN
690
691	CALL cpu_log( log_point(60), 'nesting', 'start' )
692	!
693	!-- Domain nesting. The data transfer subroutines pmci_server_datatrans
694	!-- and pmci_client_datatatrans are called inside the wrapper
695	!-- subroutine pmci_datatrans according to the control parameters
696	!-- nesting_mode and nesting_datatransfer_mode.
697	!-- TO_DO: why is nesting_mode given as a parameter here?
698	CALL pmci_datatrans( nesting_mode )
699
700	IF ( nesting_mode == 'two-way' ) THEN
701	!
702	!-- Exchange_horiz is needed for all server-domains after the
703	!-- anterpolation
704	CALL exchange_horiz( u, nbgp )
705	CALL exchange_horiz( v, nbgp )
706	CALL exchange_horiz( w, nbgp )
707	CALL exchange_horiz( pt, nbgp )
708	IF ( humidity .OR. passive_scalar ) THEN
709	CALL exchange_horiz( q, nbgp )
710	ENDIF
711	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e, nbgp )
712	ENDIF
713	!
714	!-- Correct the w top-BC in nest domains to ensure mass conservation.
715	!-- This action must never be done for the root domain.
716	IF ( nest_domain ) THEN
717	CALL pmci_ensure_nest_mass_conservation
718	ENDIF
719
720	CALL cpu_log( log_point(60), 'nesting', 'stop' )
721
722	ENDIF
723
724	!
725	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
726	!-- when a sloping surface is used
727	IF ( sloping_surface ) THEN
728	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
729	pt_slope_offset
730	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
731	pt_slope_offset
732	ENDIF
733
734	!
735	!-- Impose a turbulent inflow using the recycling method
736	IF ( turbulent_inflow ) CALL inflow_turbulence
737
738	!
739	!-- Impose a random perturbation on the horizontal velocity field
740	IF ( create_disturbances .AND. &
741	( call_psolver_at_all_substeps .AND. &
742	intermediate_timestep_count == intermediate_timestep_count_max )&
743	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
744	intermediate_timestep_count == 1 ) ) &
745	THEN
746	time_disturb = time_disturb + dt_3d
747	IF ( time_disturb >= dt_disturb ) THEN
748	!$acc update host( u, v )
749	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
750	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
751	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
752	CALL disturb_field( nzb_u_inner, tend, u )
753	CALL disturb_field( nzb_v_inner, tend, v )
754	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
755	!
756	!-- Runs with a non-cyclic lateral wall need perturbations
757	!-- near the inflow throughout the whole simulation
758	dist_range = 1
759	CALL disturb_field( nzb_u_inner, tend, u )
760	CALL disturb_field( nzb_v_inner, tend, v )
761	dist_range = 0
762	ENDIF
763	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
764	!$acc update device( u, v )
765	time_disturb = time_disturb - dt_disturb
766	ENDIF
767	ENDIF
768
769	!
770	!-- Reduce the velocity divergence via the equation for perturbation
771	!-- pressure.
772	IF ( intermediate_timestep_count == 1 .OR. &
773	call_psolver_at_all_substeps ) THEN
774	CALL pres
775	ENDIF
776
777	!
778	!-- If required, compute liquid water content
779	IF ( cloud_physics ) THEN
780	CALL calc_liquid_water_content
781	!$acc update device( ql )
782	ENDIF
783	!
784	!-- If required, compute virtual potential temperature
785	IF ( humidity ) THEN
786	CALL compute_vpt
787	!$acc update device( vpt )
788	ENDIF
789
790	!
791	!-- Compute the diffusion quantities
792	IF ( .NOT. constant_diffusion ) THEN
793
794	!
795	!-- Determine surface fluxes shf and qsws and surface values
796	!-- pt_surface and q_surface in dependence on data from external
797	!-- file LSF_DATA respectively
798	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
799	intermediate_timestep_count == intermediate_timestep_count_max )&
800	THEN
801	CALL ls_forcing_surf ( simulated_time )
802	ENDIF
803
804	!
805	!-- First the vertical fluxes in the surface (constant flux) layer are computed
806	IF ( constant_flux_layer ) THEN
807	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
808	CALL surface_layer_fluxes
809	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
810	ENDIF
811
812	!
813	!-- If required, solve the energy balance for the surface and run soil
814	!-- model
815	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
816
817	CALL cpu_log( log_point(54), 'land_surface', 'start' )
818	CALL lsm_energy_balance
819	CALL lsm_soil_model
820	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
821	ENDIF
822	!
823	!-- Compute the diffusion coefficients
824	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
825	IF ( .NOT. humidity ) THEN
826	IF ( ocean ) THEN
827	CALL diffusivities( prho, prho_reference )
828	ELSE
829	CALL diffusivities( pt, pt_reference )
830	ENDIF
831	ELSE
832	CALL diffusivities( vpt, pt_reference )
833	ENDIF
834	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
835
836	ENDIF
837
838	!
839	!-- If required, calculate radiative fluxes and heating rates
840	IF ( radiation .AND. intermediate_timestep_count &
841	== intermediate_timestep_count_max .AND. simulated_time > &
842	skip_time_do_radiation ) THEN
843
844	time_radiation = time_radiation + dt_3d
845
846	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
847	THEN
848
849	CALL cpu_log( log_point(50), 'radiation', 'start' )
850
851	IF ( .NOT. force_radiation_call ) THEN
852	time_radiation = time_radiation - dt_radiation
853	ENDIF
854
855	IF ( radiation_scheme == 'clear-sky' ) THEN
856	CALL radiation_clearsky
857	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
858	CALL radiation_rrtmg
859	ENDIF
860
861	CALL cpu_log( log_point(50), 'radiation', 'stop' )
862	ENDIF
863	ENDIF
864
865	ENDDO ! Intermediate step loop
866
867	!
868	!-- Increase simulation time and output times
869	nr_timesteps_this_run = nr_timesteps_this_run + 1
870	current_timestep_number = current_timestep_number + 1
871	simulated_time = simulated_time + dt_3d
872	simulated_time_chr = time_to_string( simulated_time )
873	time_since_reference_point = simulated_time - coupling_start_time
874
875	IF ( simulated_time >= skip_time_data_output_av ) THEN
876	time_do_av = time_do_av + dt_3d
877	ENDIF
878	IF ( simulated_time >= skip_time_do2d_xy ) THEN
879	time_do2d_xy = time_do2d_xy + dt_3d
880	ENDIF
881	IF ( simulated_time >= skip_time_do2d_xz ) THEN
882	time_do2d_xz = time_do2d_xz + dt_3d
883	ENDIF
884	IF ( simulated_time >= skip_time_do2d_yz ) THEN
885	time_do2d_yz = time_do2d_yz + dt_3d
886	ENDIF
887	IF ( simulated_time >= skip_time_do3d ) THEN
888	time_do3d = time_do3d + dt_3d
889	ENDIF
890	DO mid = 1, masks
891	IF ( simulated_time >= skip_time_domask(mid) ) THEN
892	time_domask(mid)= time_domask(mid) + dt_3d
893	ENDIF
894	ENDDO
895	time_dvrp = time_dvrp + dt_3d
896	IF ( simulated_time >= skip_time_dosp ) THEN
897	time_dosp = time_dosp + dt_3d
898	ENDIF
899	time_dots = time_dots + dt_3d
900	IF ( .NOT. first_call_lpm ) THEN
901	time_dopts = time_dopts + dt_3d
902	ENDIF
903	IF ( simulated_time >= skip_time_dopr ) THEN
904	time_dopr = time_dopr + dt_3d
905	ENDIF
906	time_dopr_listing = time_dopr_listing + dt_3d
907	time_run_control = time_run_control + dt_3d
908
909	!
910	!-- Data exchange between coupled models
911	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
912	time_coupling = time_coupling + dt_3d
913
914	!
915	!-- In case of model termination initiated by the local model
916	!-- (terminate_coupled > 0), the coupler must be skipped because it would
917	!-- cause an MPI intercomminucation hang.
918	!-- If necessary, the coupler will be called at the beginning of the
919	!-- next restart run.
920	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
921	CALL surface_coupler
922	time_coupling = time_coupling - dt_coupling
923	ENDDO
924	ENDIF
925
926	!
927	!-- Execute user-defined actions
928	CALL user_actions( 'after_integration' )
929
930	!
931	!-- If Galilei transformation is used, determine the distance that the
932	!-- model has moved so far
933	IF ( galilei_transformation ) THEN
934	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
935	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
936	ENDIF
937
938	!
939	!-- Check, if restart is necessary (because cpu-time is expiring or
940	!-- because it is forced by user) and set stop flag
941	!-- This call is skipped if the remote model has already initiated a restart.
942	IF ( .NOT. terminate_run ) CALL check_for_restart
943
944	!
945	!-- Carry out statistical analysis and output at the requested output times.
946	!-- The MOD function is used for calculating the output time counters (like
947	!-- time_dopr) in order to regard a possible decrease of the output time
948	!-- interval in case of restart runs
949
950	!
951	!-- Set a flag indicating that so far no statistics have been created
952	!-- for this time step
953	flow_statistics_called = .FALSE.
954
955	!
956	!-- If required, call flow_statistics for averaging in time
957	IF ( averaging_interval_pr /= 0.0_wp .AND. &
958	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
959	simulated_time >= skip_time_dopr ) THEN
960	time_dopr_av = time_dopr_av + dt_3d
961	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
962	do_sum = .TRUE.
963	time_dopr_av = MOD( time_dopr_av, &
964	MAX( dt_averaging_input_pr, dt_3d ) )
965	ENDIF
966	ENDIF
967	IF ( do_sum ) CALL flow_statistics
968
969	!
970	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
971	IF ( averaging_interval /= 0.0_wp .AND. &
972	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
973	simulated_time >= skip_time_data_output_av ) &
974	THEN
975	time_do_sla = time_do_sla + dt_3d
976	IF ( time_do_sla >= dt_averaging_input ) THEN
977	CALL sum_up_3d_data
978	average_count_3d = average_count_3d + 1
979	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
980	ENDIF
981	ENDIF
982
983	!
984	!-- Calculate spectra for time averaging
985	IF ( averaging_interval_sp /= 0.0_wp .AND. &
986	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
987	simulated_time >= skip_time_dosp ) THEN
988	time_dosp_av = time_dosp_av + dt_3d
989	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
990	CALL calc_spectra
991	time_dosp_av = MOD( time_dosp_av, &
992	MAX( dt_averaging_input_pr, dt_3d ) )
993	ENDIF
994	ENDIF
995
996	!
997	!-- Computation and output of run control parameters.
998	!-- This is also done whenever perturbations have been imposed
999	IF ( time_run_control >= dt_run_control .OR. &
1000	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
1001	THEN
1002	CALL run_control
1003	IF ( time_run_control >= dt_run_control ) THEN
1004	time_run_control = MOD( time_run_control, &
1005	MAX( dt_run_control, dt_3d ) )
1006	ENDIF
1007	ENDIF
1008
1009	!
1010	!-- Profile output (ASCII) on file
1011	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
1012	CALL print_1d
1013	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
1014	dt_3d ) )
1015	ENDIF
1016
1017	!
1018	!-- Graphic output for PROFIL
1019	IF ( time_dopr >= dt_dopr ) THEN
1020	IF ( dopr_n /= 0 ) CALL data_output_profiles
1021	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
1022	time_dopr_av = 0.0_wp ! due to averaging (see above)
1023	ENDIF
1024
1025	!
1026	!-- Graphic output for time series
1027	IF ( time_dots >= dt_dots ) THEN
1028	CALL data_output_tseries
1029	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
1030	ENDIF
1031
1032	!
1033	!-- Output of spectra (formatted for use with PROFIL), in case of no
1034	!-- time averaging, spectra has to be calculated before
1035	IF ( time_dosp >= dt_dosp ) THEN
1036	IF ( average_count_sp == 0 ) CALL calc_spectra
1037	CALL data_output_spectra
1038	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
1039	ENDIF
1040
1041	!
1042	!-- 2d-data output (cross-sections)
1043	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
1044	CALL data_output_2d( 'xy', 0 )
1045	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
1046	ENDIF
1047	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
1048	CALL data_output_2d( 'xz', 0 )
1049	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
1050	ENDIF
1051	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
1052	CALL data_output_2d( 'yz', 0 )
1053	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
1054	ENDIF
1055
1056	!
1057	!-- 3d-data output (volume data)
1058	IF ( time_do3d >= dt_do3d ) THEN
1059	CALL data_output_3d( 0 )
1060	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
1061	ENDIF
1062
1063	!
1064	!-- Masked data output
1065	DO mid = 1, masks
1066	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
1067	CALL data_output_mask( 0 )
1068	time_domask(mid) = MOD( time_domask(mid), &
1069	MAX( dt_domask(mid), dt_3d ) )
1070	ENDIF
1071	ENDDO
1072
1073	!
1074	!-- Output of time-averaged 2d/3d/masked data
1075	IF ( time_do_av >= dt_data_output_av ) THEN
1076	CALL average_3d_data
1077	CALL data_output_2d( 'xy', 1 )
1078	CALL data_output_2d( 'xz', 1 )
1079	CALL data_output_2d( 'yz', 1 )
1080	CALL data_output_3d( 1 )
1081	DO mid = 1, masks
1082	CALL data_output_mask( 1 )
1083	ENDDO
1084	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1085	ENDIF
1086
1087	!
1088	!-- Output of particle time series
1089	IF ( particle_advection ) THEN
1090	IF ( time_dopts >= dt_dopts .OR. &
1091	( simulated_time >= particle_advection_start .AND. &
1092	first_call_lpm ) ) THEN
1093	CALL data_output_ptseries
1094	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1095	ENDIF
1096	ENDIF
1097
1098	!
1099	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1100	#if defined( __dvrp_graphics )
1101	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1102	#endif
1103	IF ( time_dvrp >= dt_dvrp ) THEN
1104	CALL data_output_dvrp
1105	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1106	ENDIF
1107	#if defined( __dvrp_graphics )
1108	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1109	#endif
1110
1111	!
1112	!-- If required, set the heat flux for the next time step at a random value
1113	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
1114
1115	!
1116	!-- Execute user-defined actions
1117	CALL user_actions( 'after_timestep' )
1118
1119	!
1120	!-- Output elapsed simulated time in form of a progress bar on stdout
1121	IF ( myid == 0 ) CALL output_progress_bar
1122
1123	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1124
1125
1126	ENDDO ! time loop
1127
1128	IF ( myid == 0 ) CALL finish_progress_bar
1129
1130	#if defined( __dvrp_graphics )
1131	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1132	#endif
1133
1134	CALL location_message( 'finished time-stepping', .TRUE. )
1135
1136	END SUBROUTINE time_integration

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