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source: palm/trunk/SOURCE/time_integration.f90 @ 1499

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1	SUBROUTINE time_integration
2
3	!--------------------------------------------------------------------------------!
4	! This file is part of PALM.
5	!
6	! PALM is free software: you can redistribute it and/or modify it under the terms
7	! of the GNU General Public License as published by the Free Software Foundation,
8	! either version 3 of the License, or (at your option) any later version.
9	!
10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
13	!
14	! You should have received a copy of the GNU General Public License along with
15	! PALM. If not, see <http://www.gnu.org/licenses/>.
16	!
17	! Copyright 1997-2014 Leibniz Universitaet Hannover
18	!--------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! ------------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: time_integration.f90 1497 2014-12-02 17:28:07Z suehring $
27	!
28	! 1496 2014-12-02 17:25:50Z maronga
29	! Added calls for the land surface model and radiation scheme
30	!
31	! 1402 2014-05-09 14:25:13Z raasch
32	! location messages modified
33	!
34	! 1384 2014-05-02 14:31:06Z raasch
35	! location messages added
36	!
37	! 1380 2014-04-28 12:40:45Z heinze
38	! CALL of nudge_ref added
39	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
40	!
41	! 1365 2014-04-22 15:03:56Z boeske
42	! Reset sums_ls_l to zero at each timestep
43	! +sums_ls_l
44	! Calculation of reference state (previously in subroutine calc_mean_profile)
45
46	! 1342 2014-03-26 17:04:47Z kanani
47	! REAL constants defined as wp-kind
48	!
49	! 1320 2014-03-20 08:40:49Z raasch
50	! ONLY-attribute added to USE-statements,
51	! kind-parameters added to all INTEGER and REAL declaration statements,
52	! kinds are defined in new module kinds,
53	! old module precision_kind is removed,
54	! revision history before 2012 removed,
55	! comment fields (!:) to be used for variable explanations added to
56	! all variable declaration statements
57	! 1318 2014-03-17 13:35:16Z raasch
58	! module interfaces removed
59	!
60	! 1308 2014-03-13 14:58:42Z fricke
61	! +netcdf_data_format_save
62	! For masked data, parallel netcdf output is not tested so far, hence
63	! netcdf_data_format is switched back to non-paralell output.
64	!
65	! 1276 2014-01-15 13:40:41Z heinze
66	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
67	!
68	! 1257 2013-11-08 15:18:40Z raasch
69	! acc-update-host directive for timestep removed
70	!
71	! 1241 2013-10-30 11:36:58Z heinze
72	! Generalize calc_mean_profile for wider use
73	! Determine shf and qsws in dependence on data from LSF_DATA
74	! Determine ug and vg in dependence on data from LSF_DATA
75	! 1221 2013-09-10 08:59:13Z raasch
76	! host update of arrays before timestep is called
77	!
78	! 1179 2013-06-14 05:57:58Z raasch
79	! mean profiles for reference state are only calculated if required,
80	! small bugfix for background communication
81	!
82	! 1171 2013-05-30 11:27:45Z raasch
83	! split of prognostic_equations deactivated (comment lines), for the time being
84	!
85	! 1128 2013-04-12 06:19:32Z raasch
86	! asynchronous transfer of ghost point data realized for acc-optimized version:
87	! prognostic_equations are first called two times for those points required for
88	! the left-right and north-south exchange, respectively, and then for the
89	! remaining points,
90	! those parts requiring global communication moved from prognostic_equations to
91	! here
92	!
93	! 1115 2013-03-26 18:16:16Z hoffmann
94	! calculation of qr and nr is restricted to precipitation
95	!
96	! 1113 2013-03-10 02:48:14Z raasch
97	! GPU-porting of boundary conditions,
98	! openACC directives updated
99	! formal parameter removed from routine boundary_conds
100	!
101	! 1111 2013-03-08 23:54:10Z raasch
102	! +internal timestep counter for cpu statistics added,
103	! openACC directives updated
104	!
105	! 1092 2013-02-02 11:24:22Z raasch
106	! unused variables removed
107	!
108	! 1065 2012-11-22 17:42:36Z hoffmann
109	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
110	!
111	! 1053 2012-11-13 17:11:03Z hoffmann
112	! exchange of ghost points for nr, qr added
113	!
114	! 1036 2012-10-22 13:43:42Z raasch
115	! code put under GPL (PALM 3.9)
116	!
117	! 1019 2012-09-28 06:46:45Z raasch
118	! non-optimized version of prognostic_equations removed
119	!
120	! 1015 2012-09-27 09:23:24Z raasch
121	! +call of prognostic_equations_acc
122	!
123	! 1001 2012-09-13 14:08:46Z raasch
124	! all actions concerning leapfrog- and upstream-spline-scheme removed
125	!
126	! 849 2012-03-15 10:35:09Z raasch
127	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
128	!
129	! 825 2012-02-19 03:03:44Z raasch
130	! wang_collision_kernel renamed wang_kernel
131	!
132	! Revision 1.1 1997/08/11 06:19:04 raasch
133	! Initial revision
134	!
135	!
136	! Description:
137	! ------------
138	! Integration in time of the model equations, statistical analysis and graphic
139	! output
140	!------------------------------------------------------------------------------!
141
142	USE advec_ws, &
143	ONLY: ws_statistics
144
145	USE arrays_3d, &
146	ONLY: diss, dzu, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, ql, &
147	ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, u, &
148	u_p, v, vpt, v_p, w_p
149
150	USE calc_mean_profile_mod, &
151	ONLY: calc_mean_profile
152
153	USE control_parameters, &
154	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
155	average_count_sp, averaging_interval, averaging_interval_pr, &
156	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
157	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
158	cloud_physics, constant_heatflux, create_disturbances, dopr_n, &
159	constant_diffusion, coupling_mode, coupling_start_time, &
160	current_timestep_number, disturbance_created, &
161	disturbance_energy_limit, dist_range, do_sum, dt_3d, &
162	dt_averaging_input, dt_averaging_input_pr, dt_coupling, &
163	dt_data_output_av, dt_disturb, dt_do2d_xy, dt_do2d_xz, &
164	dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
165	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
166	end_time, first_call_lpm, galilei_transformation, humidity, &
167	icloud_scheme, intermediate_timestep_count, &
168	intermediate_timestep_count_max, large_scale_forcing, &
169	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
170	netcdf_data_format, neutral, nr_timesteps_this_run, nudging, &
171	ocean, on_device, passive_scalar, prandtl_layer, precipitation, &
172	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
173	run_coupled, simulated_time, simulated_time_chr, &
174	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
175	skip_time_do3d, skip_time_domask, skip_time_dopr, &
176	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
177	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
178	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
179	time_do3d, time_domask, time_dopr, time_dopr_av, &
180	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
181	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
182	time_run_control, time_since_reference_point, &
183	turbulence, &
184	turbulent_inflow, use_initial_profile_as_reference, &
185	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
186	ws_scheme_sca
187
188	USE cpulog, &
189	ONLY: cpu_log, log_point, log_point_s
190
191	USE indices, &
192	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
193	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
194
195	USE interaction_droplets_ptq_mod, &
196	ONLY: interaction_droplets_ptq
197
198	USE kinds
199
200	USE land_surface_model_mod, &
201	ONLY: land_surface, lsm_energy_balance, lsm_soil_model
202
203	USE ls_forcing_mod, &
204	ONLY: ls_forcing_surf, ls_forcing_vert
205
206	USE nudge_mod, &
207	ONLY: calc_tnudge, nudge_ref
208
209	USE particle_attributes, &
210	ONLY: particle_advection, particle_advection_start, wang_kernel
211
212	USE pegrid
213
214	USE production_e_mod, &
215	ONLY: production_e_init
216
217	USE progress_bar, &
218	ONLY: finish_progress_bar, output_progress_bar
219
220	USE prognostic_equations_mod, &
221	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
222	prognostic_equations_vector
223
224	USE radiation_model_mod, &
225	ONLY: dt_radiation, lsm_radiation, radiation, time_radiation
226
227	USE statistics, &
228	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
229
230	USE user_actions_mod, &
231	ONLY: user_actions
232
233	IMPLICIT NONE
234
235	CHARACTER (LEN=9) :: time_to_string !:
236
237	INTEGER(iwp) :: netcdf_data_format_save !:
238
239	!
240	!-- At the beginning of a simulation determine the time step as well as
241	!-- determine and print out the run control parameters
242	IF ( simulated_time == 0.0_wp ) CALL timestep
243
244	CALL run_control
245
246
247	!
248	!-- Data exchange between coupled models in case that a call has been omitted
249	!-- at the end of the previous run of a job chain.
250	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
251	!
252	!-- In case of model termination initiated by the local model the coupler
253	!-- must not be called because this would again cause an MPI hang.
254	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
255	CALL surface_coupler
256	time_coupling = time_coupling - dt_coupling
257	ENDDO
258	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
259	THEN
260	time_coupling = time_since_reference_point
261	ENDIF
262	ENDIF
263
264
265	#if defined( __dvrp_graphics )
266	!
267	!-- Time measurement with dvrp software
268	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
269	#endif
270
271	CALL location_message( 'start with time-stepping', .TRUE. )
272	!
273	!-- Start of the time loop
274	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
275	.NOT. terminate_run )
276
277	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
278
279	!
280	!-- Determine size of next time step
281	IF ( simulated_time /= 0.0_wp ) THEN
282	CALL timestep
283	ENDIF
284
285	!
286	!-- Determine ug, vg and w_subs in dependence on data from external file
287	!-- LSF_DATA
288	IF ( large_scale_forcing .AND. lsf_vert ) THEN
289	CALL ls_forcing_vert ( simulated_time )
290	sums_ls_l = 0.0_wp
291	ENDIF
292
293	!
294	!-- Set pt_init and q_init to the current profiles taken from
295	!-- NUDGING_DATA
296	IF ( nudging ) THEN
297	CALL nudge_ref ( simulated_time )
298	!
299	!-- Store temperature gradient at the top boundary for possible Neumann
300	!-- boundary condition
301	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
302	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
303	ENDIF
304
305	!
306	!-- Execute the user-defined actions
307	CALL user_actions( 'before_timestep' )
308
309	!
310	!-- Start of intermediate step loop
311	intermediate_timestep_count = 0
312	DO WHILE ( intermediate_timestep_count < &
313	intermediate_timestep_count_max )
314
315	intermediate_timestep_count = intermediate_timestep_count + 1
316
317	!
318	!-- Set the steering factors for the prognostic equations which depend
319	!-- on the timestep scheme
320	CALL timestep_scheme_steering
321
322	!
323	!-- Calculate those variables needed in the tendency terms which need
324	!-- global communication
325	IF ( .NOT. use_single_reference_value .AND. &
326	.NOT. use_initial_profile_as_reference ) THEN
327	!
328	!-- Horizontally averaged profiles to be used as reference state in
329	!-- buoyancy terms (WARNING: only the respective last call of
330	!-- calc_mean_profile defines the reference state!)
331	IF ( .NOT. neutral ) THEN
332	CALL calc_mean_profile( pt, 4 )
333	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
334	ENDIF
335	IF ( ocean ) THEN
336	CALL calc_mean_profile( rho, 64 )
337	ref_state(:) = hom(:,1,64,0)
338	ENDIF
339	IF ( humidity ) THEN
340	CALL calc_mean_profile( vpt, 44 )
341	ref_state(:) = hom(:,1,44,0)
342	ENDIF
343
344	ENDIF
345
346	IF ( .NOT. constant_diffusion ) CALL production_e_init
347	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
348	intermediate_timestep_count == 1 ) CALL ws_statistics
349	!
350	!-- In case of nudging calculate current nudging time scale and horizontal
351	!-- means of u, v, pt and q
352	IF ( nudging ) THEN
353	CALL calc_tnudge( simulated_time )
354	CALL calc_mean_profile( u, 1 )
355	CALL calc_mean_profile( v, 2 )
356	CALL calc_mean_profile( pt, 4 )
357	CALL calc_mean_profile( q, 41 )
358	ENDIF
359
360	!
361	!-- Solve the prognostic equations. A fast cache optimized version with
362	!-- only one single loop is used in case of Piascek-Williams advection
363	!-- scheme. NEC vector machines use a different version, because
364	!-- in the other versions a good vectorization is prohibited due to
365	!-- inlining problems.
366	IF ( loop_optimization == 'cache' ) THEN
367	CALL prognostic_equations_cache
368	ELSEIF ( loop_optimization == 'vector' ) THEN
369	CALL prognostic_equations_vector
370	ELSEIF ( loop_optimization == 'acc' ) THEN
371	i_left = nxl; i_right = nxr
372	j_south = nys; j_north = nyn
373	CALL prognostic_equations_acc
374
375	! i_left = nxl; i_right = nxl+nbgp-1
376	! j_south = nys; j_north = nyn
377	! CALL prognostic_equations_acc
378	! i_left = nxr-nbgp+1; i_right = nxr
379	! j_south = nys; j_north = nyn
380	! CALL prognostic_equations_acc
381
382	!
383	!-- Exchange of ghost points (lateral boundary conditions)
384	IF ( background_communication ) THEN
385
386	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
387
388	send_receive = 'lr'
389	sendrecv_in_background = .TRUE.
390	req = 0
391	req_count = 0
392
393	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
394	on_device = .TRUE. ! to be removed after complete porting
395	ELSE ! of ghost point exchange
396	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
397	ENDIF
398
399	CALL exchange_horiz( u_p, nbgp )
400	CALL exchange_horiz( v_p, nbgp )
401	CALL exchange_horiz( w_p, nbgp )
402	CALL exchange_horiz( pt_p, nbgp )
403	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
404	IF ( ocean ) THEN
405	CALL exchange_horiz( sa_p, nbgp )
406	CALL exchange_horiz( rho, nbgp )
407	CALL exchange_horiz( prho, nbgp )
408	ENDIF
409	IF (humidity .OR. passive_scalar) THEN
410	CALL exchange_horiz( q_p, nbgp )
411	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
412	CALL exchange_horiz( qr_p, nbgp )
413	CALL exchange_horiz( nr_p, nbgp )
414	ENDIF
415	ENDIF
416	IF ( cloud_droplets ) THEN
417	CALL exchange_horiz( ql, nbgp )
418	CALL exchange_horiz( ql_c, nbgp )
419	CALL exchange_horiz( ql_v, nbgp )
420	CALL exchange_horiz( ql_vp, nbgp )
421	ENDIF
422	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
423
424	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
425	on_device = .FALSE. ! to be removed after complete porting
426	ELSE ! of ghost point exchange
427	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
428	ENDIF
429
430	sendrecv_in_background = .FALSE.
431
432	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
433
434	ENDIF
435
436	! i_left = nxl+nbgp; i_right = nxr-nbgp
437	! j_south = nys; j_north = nys+nbgp-1
438	! CALL prognostic_equations_acc
439	! i_left = nxl+nbgp; i_right = nxr-nbgp
440	! j_south = nyn-nbgp+1; j_north = nyn
441	! CALL prognostic_equations_acc
442
443	IF ( background_communication ) THEN
444	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
445	#if defined( __parallel )
446	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
447	#endif
448	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
449
450	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
451
452	send_receive = 'ns'
453	sendrecv_in_background = .TRUE.
454	req = 0
455	req_count = 0
456
457	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
458	on_device = .TRUE. ! to be removed after complete porting
459	ELSE ! of ghost point exchange
460	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
461	ENDIF
462
463	CALL exchange_horiz( u_p, nbgp )
464	CALL exchange_horiz( v_p, nbgp )
465	CALL exchange_horiz( w_p, nbgp )
466	CALL exchange_horiz( pt_p, nbgp )
467	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
468	IF ( ocean ) THEN
469	CALL exchange_horiz( sa_p, nbgp )
470	CALL exchange_horiz( rho, nbgp )
471	CALL exchange_horiz( prho, nbgp )
472	ENDIF
473	IF (humidity .OR. passive_scalar) THEN
474	CALL exchange_horiz( q_p, nbgp )
475	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
476	CALL exchange_horiz( qr_p, nbgp )
477	CALL exchange_horiz( nr_p, nbgp )
478	ENDIF
479	ENDIF
480	IF ( cloud_droplets ) THEN
481	CALL exchange_horiz( ql, nbgp )
482	CALL exchange_horiz( ql_c, nbgp )
483	CALL exchange_horiz( ql_v, nbgp )
484	CALL exchange_horiz( ql_vp, nbgp )
485	ENDIF
486	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
487
488	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
489	on_device = .FALSE. ! to be removed after complete porting
490	ELSE ! of ghost point exchange
491	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
492	ENDIF
493
494	sendrecv_in_background = .FALSE.
495
496	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
497
498	ENDIF
499
500	! i_left = nxl+nbgp; i_right = nxr-nbgp
501	! j_south = nys+nbgp; j_north = nyn-nbgp
502	! CALL prognostic_equations_acc
503
504	IF ( background_communication ) THEN
505	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
506	#if defined( __parallel )
507	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
508	#endif
509	send_receive = 'al'
510	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
511	ENDIF
512
513	ENDIF
514
515	!
516	!-- Particle transport/physics with the Lagrangian particle model
517	!-- (only once during intermediate steps, because it uses an Euler-step)
518	!-- ### particle model should be moved before prognostic_equations, in order
519	!-- to regard droplet interactions directly
520	IF ( particle_advection .AND. &
521	simulated_time >= particle_advection_start .AND. &
522	intermediate_timestep_count == 1 ) THEN
523	CALL lpm
524	first_call_lpm = .FALSE.
525	ENDIF
526
527	!
528	!-- Interaction of droplets with temperature and specific humidity.
529	!-- Droplet condensation and evaporation is calculated within
530	!-- advec_particles.
531	IF ( cloud_droplets .AND. &
532	intermediate_timestep_count == intermediate_timestep_count_max )&
533	THEN
534	CALL interaction_droplets_ptq
535	ENDIF
536
537	!
538	!-- Exchange of ghost points (lateral boundary conditions)
539	IF ( .NOT. background_communication ) THEN
540
541	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
542
543	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
544	on_device = .TRUE. ! to be removed after complete porting
545	ELSE ! of ghost point exchange
546	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
547	ENDIF
548
549	CALL exchange_horiz( u_p, nbgp )
550	CALL exchange_horiz( v_p, nbgp )
551	CALL exchange_horiz( w_p, nbgp )
552	CALL exchange_horiz( pt_p, nbgp )
553	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
554	IF ( ocean ) THEN
555	CALL exchange_horiz( sa_p, nbgp )
556	CALL exchange_horiz( rho, nbgp )
557	CALL exchange_horiz( prho, nbgp )
558	ENDIF
559	IF (humidity .OR. passive_scalar) THEN
560	CALL exchange_horiz( q_p, nbgp )
561	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
562	precipitation ) THEN
563	CALL exchange_horiz( qr_p, nbgp )
564	CALL exchange_horiz( nr_p, nbgp )
565	ENDIF
566	ENDIF
567	IF ( cloud_droplets ) THEN
568	CALL exchange_horiz( ql, nbgp )
569	CALL exchange_horiz( ql_c, nbgp )
570	CALL exchange_horiz( ql_v, nbgp )
571	CALL exchange_horiz( ql_vp, nbgp )
572	ENDIF
573	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
574
575	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
576	on_device = .FALSE. ! to be removed after complete porting
577	ELSE ! of ghost point exchange
578	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
579	ENDIF
580
581	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
582
583	ENDIF
584
585	!
586	!-- Boundary conditions for the prognostic quantities (except of the
587	!-- velocities at the outflow in case of a non-cyclic lateral wall)
588	CALL boundary_conds
589
590	!
591	!-- When using the land surface model:
592	!-- 1) solve energy balance equation to calculate new skin temperature
593	!-- 2) run soil model
594	IF ( land_surface ) THEN
595
596	time_radiation = time_radiation + dt_3d
597
598	IF ( time_radiation >= dt_radiation ) THEN
599
600	CALL cpu_log( log_point(50), 'radiation', 'start' )
601
602	time_radiation = time_radiation - dt_radiation
603	CALL lsm_radiation
604
605	CALL cpu_log( log_point(50), 'radiation', 'stop' )
606	ENDIF
607
608	CALL cpu_log( log_point(54), 'land_surface', 'start' )
609
610	CALL lsm_energy_balance
611	CALL lsm_soil_model
612
613	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
614
615	ENDIF
616
617	!
618	!-- Swap the time levels in preparation for the next time step.
619	CALL swap_timelevel
620
621	!
622	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
623	!-- when a sloping surface is used
624	IF ( sloping_surface ) THEN
625	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
626	pt_slope_offset
627	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
628	pt_slope_offset
629	ENDIF
630
631	!
632	!-- Impose a turbulent inflow using the recycling method
633	IF ( turbulent_inflow ) CALL inflow_turbulence
634
635	!
636	!-- Impose a random perturbation on the horizontal velocity field
637	IF ( create_disturbances .AND. &
638	( call_psolver_at_all_substeps .AND. &
639	intermediate_timestep_count == intermediate_timestep_count_max )&
640	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
641	intermediate_timestep_count == 1 ) ) &
642	THEN
643	time_disturb = time_disturb + dt_3d
644	IF ( time_disturb >= dt_disturb ) THEN
645	!$acc update host( u, v )
646	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
647	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
648	CALL disturb_field( nzb_u_inner, tend, u )
649	CALL disturb_field( nzb_v_inner, tend, v )
650	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
651	!
652	!-- Runs with a non-cyclic lateral wall need perturbations
653	!-- near the inflow throughout the whole simulation
654	dist_range = 1
655	CALL disturb_field( nzb_u_inner, tend, u )
656	CALL disturb_field( nzb_v_inner, tend, v )
657	dist_range = 0
658	ENDIF
659	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
660	!$acc update device( u, v )
661	time_disturb = time_disturb - dt_disturb
662	ENDIF
663	ENDIF
664
665	!
666	!-- Reduce the velocity divergence via the equation for perturbation
667	!-- pressure.
668	IF ( intermediate_timestep_count == 1 .OR. &
669	call_psolver_at_all_substeps ) THEN
670	CALL pres
671	ENDIF
672
673	!
674	!-- If required, compute liquid water content
675	IF ( cloud_physics ) THEN
676	CALL calc_liquid_water_content
677	!$acc update device( ql )
678	ENDIF
679	!
680	!-- If required, compute virtual potential temperature
681	IF ( humidity ) THEN
682	CALL compute_vpt
683	!$acc update device( vpt )
684	ENDIF
685	!
686	!-- Compute the diffusion quantities
687	IF ( .NOT. constant_diffusion ) THEN
688
689	!
690	!-- Determine surface fluxes shf and qsws and surface values
691	!-- pt_surface and q_surface in dependence on data from external
692	!-- file LSF_DATA respectively
693	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
694	intermediate_timestep_count == intermediate_timestep_count_max )&
695	THEN
696	CALL ls_forcing_surf ( simulated_time )
697	ENDIF
698
699	!
700	!-- First the vertical fluxes in the Prandtl layer are being computed
701	IF ( prandtl_layer ) THEN
702	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
703	CALL prandtl_fluxes
704	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
705	ENDIF
706
707	!
708	!-- Compute the diffusion coefficients
709	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
710	IF ( .NOT. humidity ) THEN
711	IF ( ocean ) THEN
712	CALL diffusivities( prho, prho_reference )
713	ELSE
714	CALL diffusivities( pt, pt_reference )
715	ENDIF
716	ELSE
717	CALL diffusivities( vpt, pt_reference )
718	ENDIF
719	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
720
721	ENDIF
722
723	ENDDO ! Intermediate step loop
724
725	!
726	!-- Increase simulation time and output times
727	nr_timesteps_this_run = nr_timesteps_this_run + 1
728	current_timestep_number = current_timestep_number + 1
729	simulated_time = simulated_time + dt_3d
730	simulated_time_chr = time_to_string( simulated_time )
731	time_since_reference_point = simulated_time - coupling_start_time
732
733	IF ( simulated_time >= skip_time_data_output_av ) THEN
734	time_do_av = time_do_av + dt_3d
735	ENDIF
736	IF ( simulated_time >= skip_time_do2d_xy ) THEN
737	time_do2d_xy = time_do2d_xy + dt_3d
738	ENDIF
739	IF ( simulated_time >= skip_time_do2d_xz ) THEN
740	time_do2d_xz = time_do2d_xz + dt_3d
741	ENDIF
742	IF ( simulated_time >= skip_time_do2d_yz ) THEN
743	time_do2d_yz = time_do2d_yz + dt_3d
744	ENDIF
745	IF ( simulated_time >= skip_time_do3d ) THEN
746	time_do3d = time_do3d + dt_3d
747	ENDIF
748	DO mid = 1, masks
749	IF ( simulated_time >= skip_time_domask(mid) ) THEN
750	time_domask(mid)= time_domask(mid) + dt_3d
751	ENDIF
752	ENDDO
753	time_dvrp = time_dvrp + dt_3d
754	IF ( simulated_time >= skip_time_dosp ) THEN
755	time_dosp = time_dosp + dt_3d
756	ENDIF
757	time_dots = time_dots + dt_3d
758	IF ( .NOT. first_call_lpm ) THEN
759	time_dopts = time_dopts + dt_3d
760	ENDIF
761	IF ( simulated_time >= skip_time_dopr ) THEN
762	time_dopr = time_dopr + dt_3d
763	ENDIF
764	time_dopr_listing = time_dopr_listing + dt_3d
765	time_run_control = time_run_control + dt_3d
766
767	!
768	!-- Data exchange between coupled models
769	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
770	time_coupling = time_coupling + dt_3d
771
772	!
773	!-- In case of model termination initiated by the local model
774	!-- (terminate_coupled > 0), the coupler must be skipped because it would
775	!-- cause an MPI intercomminucation hang.
776	!-- If necessary, the coupler will be called at the beginning of the
777	!-- next restart run.
778	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
779	CALL surface_coupler
780	time_coupling = time_coupling - dt_coupling
781	ENDDO
782	ENDIF
783
784	!
785	!-- Execute user-defined actions
786	CALL user_actions( 'after_integration' )
787
788	!
789	!-- If Galilei transformation is used, determine the distance that the
790	!-- model has moved so far
791	IF ( galilei_transformation ) THEN
792	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
793	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
794	ENDIF
795
796	!
797	!-- Check, if restart is necessary (because cpu-time is expiring or
798	!-- because it is forced by user) and set stop flag
799	!-- This call is skipped if the remote model has already initiated a restart.
800	IF ( .NOT. terminate_run ) CALL check_for_restart
801
802	!
803	!-- Carry out statistical analysis and output at the requested output times.
804	!-- The MOD function is used for calculating the output time counters (like
805	!-- time_dopr) in order to regard a possible decrease of the output time
806	!-- interval in case of restart runs
807
808	!
809	!-- Set a flag indicating that so far no statistics have been created
810	!-- for this time step
811	flow_statistics_called = .FALSE.
812
813	!
814	!-- If required, call flow_statistics for averaging in time
815	IF ( averaging_interval_pr /= 0.0_wp .AND. &
816	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
817	simulated_time >= skip_time_dopr ) THEN
818	time_dopr_av = time_dopr_av + dt_3d
819	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
820	do_sum = .TRUE.
821	time_dopr_av = MOD( time_dopr_av, &
822	MAX( dt_averaging_input_pr, dt_3d ) )
823	ENDIF
824	ENDIF
825	IF ( do_sum ) CALL flow_statistics
826
827	!
828	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
829	IF ( averaging_interval /= 0.0_wp .AND. &
830	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
831	simulated_time >= skip_time_data_output_av ) &
832	THEN
833	time_do_sla = time_do_sla + dt_3d
834	IF ( time_do_sla >= dt_averaging_input ) THEN
835	CALL sum_up_3d_data
836	average_count_3d = average_count_3d + 1
837	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
838	ENDIF
839	ENDIF
840
841	!
842	!-- Calculate spectra for time averaging
843	IF ( averaging_interval_sp /= 0.0_wp .AND. &
844	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
845	simulated_time >= skip_time_dosp ) THEN
846	time_dosp_av = time_dosp_av + dt_3d
847	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
848	CALL calc_spectra
849	time_dosp_av = MOD( time_dosp_av, &
850	MAX( dt_averaging_input_pr, dt_3d ) )
851	ENDIF
852	ENDIF
853
854	!
855	!-- Computation and output of run control parameters.
856	!-- This is also done whenever perturbations have been imposed
857	IF ( time_run_control >= dt_run_control .OR. &
858	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
859	THEN
860	CALL run_control
861	IF ( time_run_control >= dt_run_control ) THEN
862	time_run_control = MOD( time_run_control, &
863	MAX( dt_run_control, dt_3d ) )
864	ENDIF
865	ENDIF
866
867	!
868	!-- Profile output (ASCII) on file
869	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
870	CALL print_1d
871	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
872	dt_3d ) )
873	ENDIF
874
875	!
876	!-- Graphic output for PROFIL
877	IF ( time_dopr >= dt_dopr ) THEN
878	IF ( dopr_n /= 0 ) CALL data_output_profiles
879	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
880	time_dopr_av = 0.0_wp ! due to averaging (see above)
881	ENDIF
882
883	!
884	!-- Graphic output for time series
885	IF ( time_dots >= dt_dots ) THEN
886	CALL data_output_tseries
887	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
888	ENDIF
889
890	!
891	!-- Output of spectra (formatted for use with PROFIL), in case of no
892	!-- time averaging, spectra has to be calculated before
893	IF ( time_dosp >= dt_dosp ) THEN
894	IF ( average_count_sp == 0 ) CALL calc_spectra
895	CALL data_output_spectra
896	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
897	ENDIF
898
899	!
900	!-- 2d-data output (cross-sections)
901	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
902	CALL data_output_2d( 'xy', 0 )
903	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
904	ENDIF
905	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
906	CALL data_output_2d( 'xz', 0 )
907	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
908	ENDIF
909	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
910	CALL data_output_2d( 'yz', 0 )
911	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
912	ENDIF
913
914	!
915	!-- 3d-data output (volume data)
916	IF ( time_do3d >= dt_do3d ) THEN
917	CALL data_output_3d( 0 )
918	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
919	ENDIF
920
921	!
922	!-- masked data output
923	!-- Parallel netcdf output is not tested so far for masked data, hence
924	!-- netcdf_data_format is switched back to non-paralell output.
925	netcdf_data_format_save = netcdf_data_format
926	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
927	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
928	DO mid = 1, masks
929	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
930	CALL data_output_mask( 0 )
931	time_domask(mid) = MOD( time_domask(mid), &
932	MAX( dt_domask(mid), dt_3d ) )
933	ENDIF
934	ENDDO
935	netcdf_data_format = netcdf_data_format_save
936
937	!
938	!-- Output of time-averaged 2d/3d/masked data
939	IF ( time_do_av >= dt_data_output_av ) THEN
940	CALL average_3d_data
941	CALL data_output_2d( 'xy', 1 )
942	CALL data_output_2d( 'xz', 1 )
943	CALL data_output_2d( 'yz', 1 )
944	CALL data_output_3d( 1 )
945	!-- Parallel netcdf output is not tested so far for masked data, hence
946	!-- netcdf_data_format is switched back to non-paralell output.
947	netcdf_data_format_save = netcdf_data_format
948	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
949	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
950	DO mid = 1, masks
951	CALL data_output_mask( 1 )
952	ENDDO
953	netcdf_data_format = netcdf_data_format_save
954	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
955	ENDIF
956
957	!
958	!-- Output of particle time series
959	IF ( particle_advection ) THEN
960	IF ( time_dopts >= dt_dopts .OR. &
961	( simulated_time >= particle_advection_start .AND. &
962	first_call_lpm ) ) THEN
963	CALL data_output_ptseries
964	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
965	ENDIF
966	ENDIF
967
968	!
969	!-- Output of dvrp-graphics (isosurface, particles, slicer)
970	#if defined( __dvrp_graphics )
971	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
972	#endif
973	IF ( time_dvrp >= dt_dvrp ) THEN
974	CALL data_output_dvrp
975	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
976	ENDIF
977	#if defined( __dvrp_graphics )
978	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
979	#endif
980
981	!
982	!-- If required, set the heat flux for the next time step at a random value
983	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
984
985	!
986	!-- Execute user-defined actions
987	CALL user_actions( 'after_timestep' )
988
989	!
990	!-- Output elapsed simulated time in form of a progress bar on stdout
991	IF ( myid == 0 ) CALL output_progress_bar
992
993	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
994
995
996	ENDDO ! time loop
997
998	IF ( myid == 0 ) CALL finish_progress_bar
999
1000	#if defined( __dvrp_graphics )
1001	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1002	#endif
1003
1004	CALL location_message( 'finished time-stepping', .TRUE. )
1005
1006	END SUBROUTINE time_integration

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