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source: palm/trunk/SOURCE/time_integration.f90 @ 1691

Last change on this file since 1691 was 1691, checked in by maronga, 9 years ago
various bugfixes and modifications of the atmosphere-land-surface-radiation interaction. Completely re-written routine to calculate surface fluxes (surface_layer_fluxes.f90) that replaces prandtl_fluxes. Minor formatting corrections and renamings
Property svn:keywords set to `Id`
File size: 40.9 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 1997-2015 Leibniz Universitaet Hannover
17	!--------------------------------------------------------------------------------!
18	!
19	! Current revisions:
20	! ------------------
21	! Added option for spin-ups without land surface and radiation models. Moved calls
22	! for radiation and lan surface schemes.
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: time_integration.f90 1691 2015-10-26 16:17:44Z maronga $
27	!
28	! 1682 2015-10-07 23:56:08Z knoop
29	! Code annotations made doxygen readable
30	!
31	! 1671 2015-09-25 03:29:37Z raasch
32	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
33	! for particles
34	!
35	! 1585 2015-04-30 07:05:52Z maronga
36	! Moved call of radiation scheme. Added support for RRTM
37	!
38	! 1551 2015-03-03 14:18:16Z maronga
39	! Added interface for different radiation schemes.
40	!
41	! 1496 2014-12-02 17:25:50Z maronga
42	! Added calls for the land surface model and radiation scheme
43	!
44	! 1402 2014-05-09 14:25:13Z raasch
45	! location messages modified
46	!
47	! 1384 2014-05-02 14:31:06Z raasch
48	! location messages added
49	!
50	! 1380 2014-04-28 12:40:45Z heinze
51	! CALL of nudge_ref added
52	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
53	!
54	! 1365 2014-04-22 15:03:56Z boeske
55	! Reset sums_ls_l to zero at each timestep
56	! +sums_ls_l
57	! Calculation of reference state (previously in subroutine calc_mean_profile)
58
59	! 1342 2014-03-26 17:04:47Z kanani
60	! REAL constants defined as wp-kind
61	!
62	! 1320 2014-03-20 08:40:49Z raasch
63	! ONLY-attribute added to USE-statements,
64	! kind-parameters added to all INTEGER and REAL declaration statements,
65	! kinds are defined in new module kinds,
66	! old module precision_kind is removed,
67	! revision history before 2012 removed,
68	! comment fields (!:) to be used for variable explanations added to
69	! all variable declaration statements
70	! 1318 2014-03-17 13:35:16Z raasch
71	! module interfaces removed
72	!
73	! 1308 2014-03-13 14:58:42Z fricke
74	! +netcdf_data_format_save
75	! For masked data, parallel netcdf output is not tested so far, hence
76	! netcdf_data_format is switched back to non-paralell output.
77	!
78	! 1276 2014-01-15 13:40:41Z heinze
79	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
80	!
81	! 1257 2013-11-08 15:18:40Z raasch
82	! acc-update-host directive for timestep removed
83	!
84	! 1241 2013-10-30 11:36:58Z heinze
85	! Generalize calc_mean_profile for wider use
86	! Determine shf and qsws in dependence on data from LSF_DATA
87	! Determine ug and vg in dependence on data from LSF_DATA
88	! 1221 2013-09-10 08:59:13Z raasch
89	! host update of arrays before timestep is called
90	!
91	! 1179 2013-06-14 05:57:58Z raasch
92	! mean profiles for reference state are only calculated if required,
93	! small bugfix for background communication
94	!
95	! 1171 2013-05-30 11:27:45Z raasch
96	! split of prognostic_equations deactivated (comment lines), for the time being
97	!
98	! 1128 2013-04-12 06:19:32Z raasch
99	! asynchronous transfer of ghost point data realized for acc-optimized version:
100	! prognostic_equations are first called two times for those points required for
101	! the left-right and north-south exchange, respectively, and then for the
102	! remaining points,
103	! those parts requiring global communication moved from prognostic_equations to
104	! here
105	!
106	! 1115 2013-03-26 18:16:16Z hoffmann
107	! calculation of qr and nr is restricted to precipitation
108	!
109	! 1113 2013-03-10 02:48:14Z raasch
110	! GPU-porting of boundary conditions,
111	! openACC directives updated
112	! formal parameter removed from routine boundary_conds
113	!
114	! 1111 2013-03-08 23:54:10Z raasch
115	! +internal timestep counter for cpu statistics added,
116	! openACC directives updated
117	!
118	! 1092 2013-02-02 11:24:22Z raasch
119	! unused variables removed
120	!
121	! 1065 2012-11-22 17:42:36Z hoffmann
122	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
123	!
124	! 1053 2012-11-13 17:11:03Z hoffmann
125	! exchange of ghost points for nr, qr added
126	!
127	! 1036 2012-10-22 13:43:42Z raasch
128	! code put under GPL (PALM 3.9)
129	!
130	! 1019 2012-09-28 06:46:45Z raasch
131	! non-optimized version of prognostic_equations removed
132	!
133	! 1015 2012-09-27 09:23:24Z raasch
134	! +call of prognostic_equations_acc
135	!
136	! 1001 2012-09-13 14:08:46Z raasch
137	! all actions concerning leapfrog- and upstream-spline-scheme removed
138	!
139	! 849 2012-03-15 10:35:09Z raasch
140	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
141	!
142	! 825 2012-02-19 03:03:44Z raasch
143	! wang_collision_kernel renamed wang_kernel
144	!
145	! Revision 1.1 1997/08/11 06:19:04 raasch
146	! Initial revision
147	!
148	!
149	! Description:
150	! ------------
151	!> Integration in time of the model equations, statistical analysis and graphic
152	!> output
153	!------------------------------------------------------------------------------!
154	SUBROUTINE time_integration
155
156
157	USE advec_ws, &
158	ONLY: ws_statistics
159
160	USE arrays_3d, &
161	ONLY: diss, dzu, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, ql, &
162	ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, u, &
163	u_p, v, vpt, v_p, w_p
164
165	USE calc_mean_profile_mod, &
166	ONLY: calc_mean_profile
167
168	USE control_parameters, &
169	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
170	average_count_sp, averaging_interval, averaging_interval_pr, &
171	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
172	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
173	cloud_physics, constant_flux_layer, constant_heatflux, &
174	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
175	coupling_start_time, current_timestep_number, &
176	disturbance_created, disturbance_energy_limit, dist_range, &
177	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
178	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
179	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
180	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
181	end_time, first_call_lpm, galilei_transformation, humidity, &
182	icloud_scheme, intermediate_timestep_count, &
183	intermediate_timestep_count_max, large_scale_forcing, &
184	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
185	netcdf_data_format, neutral, nr_timesteps_this_run, nudging, &
186	ocean, on_device, passive_scalar, precipitation, &
187	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
188	run_coupled, simulated_time, simulated_time_chr, &
189	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
190	skip_time_do3d, skip_time_domask, skip_time_dopr, &
191	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
192	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
193	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
194	time_do3d, time_domask, time_dopr, time_dopr_av, &
195	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
196	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
197	time_run_control, time_since_reference_point, &
198	turbulence, &
199	turbulent_inflow, use_initial_profile_as_reference, &
200	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
201	ws_scheme_sca
202
203	USE cpulog, &
204	ONLY: cpu_log, log_point, log_point_s
205
206	USE indices, &
207	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
208	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
209
210	USE interaction_droplets_ptq_mod, &
211	ONLY: interaction_droplets_ptq
212
213	USE kinds
214
215	USE land_surface_model_mod, &
216	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
217	skip_time_do_lsm
218
219	USE ls_forcing_mod, &
220	ONLY: ls_forcing_surf, ls_forcing_vert
221
222	USE nudge_mod, &
223	ONLY: calc_tnudge, nudge_ref
224
225	USE particle_attributes, &
226	ONLY: particle_advection, particle_advection_start, &
227	use_sgs_for_particles, wang_kernel
228
229	USE pegrid
230
231	USE production_e_mod, &
232	ONLY: production_e_init
233
234	USE progress_bar, &
235	ONLY: finish_progress_bar, output_progress_bar
236
237	USE prognostic_equations_mod, &
238	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
239	prognostic_equations_vector
240
241	USE radiation_model_mod, &
242	ONLY: dt_radiation, force_radiation_call, radiation, &
243	radiation_clearsky, radiation_rrtmg, radiation_scheme, &
244	skip_time_do_radiation, time_radiation
245
246	USE statistics, &
247	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
248
249	USE surface_layer_fluxes_mod, &
250	ONLY: surface_layer_fluxes
251
252	USE user_actions_mod, &
253	ONLY: user_actions
254
255	IMPLICIT NONE
256
257	CHARACTER (LEN=9) :: time_to_string !<
258
259	INTEGER(iwp) :: netcdf_data_format_save !<
260
261	!
262	!-- At the beginning of a simulation determine the time step as well as
263	!-- determine and print out the run control parameters
264	IF ( simulated_time == 0.0_wp ) CALL timestep
265
266	CALL run_control
267
268
269	!
270	!-- Data exchange between coupled models in case that a call has been omitted
271	!-- at the end of the previous run of a job chain.
272	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
273	!
274	!-- In case of model termination initiated by the local model the coupler
275	!-- must not be called because this would again cause an MPI hang.
276	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
277	CALL surface_coupler
278	time_coupling = time_coupling - dt_coupling
279	ENDDO
280	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
281	THEN
282	time_coupling = time_since_reference_point
283	ENDIF
284	ENDIF
285
286
287	#if defined( __dvrp_graphics )
288	!
289	!-- Time measurement with dvrp software
290	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
291	#endif
292
293	CALL location_message( 'start with time-stepping', .TRUE. )
294	!
295	!-- Start of the time loop
296	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
297	.NOT. terminate_run )
298
299	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
300
301	!
302	!-- Determine size of next time step
303	IF ( simulated_time /= 0.0_wp ) THEN
304	CALL timestep
305	ENDIF
306
307	!
308	!-- Determine ug, vg and w_subs in dependence on data from external file
309	!-- LSF_DATA
310	IF ( large_scale_forcing .AND. lsf_vert ) THEN
311	CALL ls_forcing_vert ( simulated_time )
312	sums_ls_l = 0.0_wp
313	ENDIF
314
315	!
316	!-- Set pt_init and q_init to the current profiles taken from
317	!-- NUDGING_DATA
318	IF ( nudging ) THEN
319	CALL nudge_ref ( simulated_time )
320	!
321	!-- Store temperature gradient at the top boundary for possible Neumann
322	!-- boundary condition
323	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
324	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
325	ENDIF
326
327	!
328	!-- Execute the user-defined actions
329	CALL user_actions( 'before_timestep' )
330
331	!
332	!-- Start of intermediate step loop
333	intermediate_timestep_count = 0
334	DO WHILE ( intermediate_timestep_count < &
335	intermediate_timestep_count_max )
336
337	intermediate_timestep_count = intermediate_timestep_count + 1
338
339	!
340	!-- Set the steering factors for the prognostic equations which depend
341	!-- on the timestep scheme
342	CALL timestep_scheme_steering
343
344	!
345	!-- Calculate those variables needed in the tendency terms which need
346	!-- global communication
347	IF ( .NOT. use_single_reference_value .AND. &
348	.NOT. use_initial_profile_as_reference ) THEN
349	!
350	!-- Horizontally averaged profiles to be used as reference state in
351	!-- buoyancy terms (WARNING: only the respective last call of
352	!-- calc_mean_profile defines the reference state!)
353	IF ( .NOT. neutral ) THEN
354	CALL calc_mean_profile( pt, 4 )
355	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
356	ENDIF
357	IF ( ocean ) THEN
358	CALL calc_mean_profile( rho, 64 )
359	ref_state(:) = hom(:,1,64,0)
360	ENDIF
361	IF ( humidity ) THEN
362	CALL calc_mean_profile( vpt, 44 )
363	ref_state(:) = hom(:,1,44,0)
364	ENDIF
365
366	ENDIF
367
368	IF ( .NOT. constant_diffusion ) CALL production_e_init
369	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
370	intermediate_timestep_count == 1 ) CALL ws_statistics
371	!
372	!-- In case of nudging calculate current nudging time scale and horizontal
373	!-- means of u, v, pt and q
374	IF ( nudging ) THEN
375	CALL calc_tnudge( simulated_time )
376	CALL calc_mean_profile( u, 1 )
377	CALL calc_mean_profile( v, 2 )
378	CALL calc_mean_profile( pt, 4 )
379	CALL calc_mean_profile( q, 41 )
380	ENDIF
381
382	!
383	!-- Solve the prognostic equations. A fast cache optimized version with
384	!-- only one single loop is used in case of Piascek-Williams advection
385	!-- scheme. NEC vector machines use a different version, because
386	!-- in the other versions a good vectorization is prohibited due to
387	!-- inlining problems.
388	IF ( loop_optimization == 'cache' ) THEN
389	CALL prognostic_equations_cache
390	ELSEIF ( loop_optimization == 'vector' ) THEN
391	CALL prognostic_equations_vector
392	ELSEIF ( loop_optimization == 'acc' ) THEN
393	i_left = nxl; i_right = nxr
394	j_south = nys; j_north = nyn
395	CALL prognostic_equations_acc
396
397	! i_left = nxl; i_right = nxl+nbgp-1
398	! j_south = nys; j_north = nyn
399	! CALL prognostic_equations_acc
400	! i_left = nxr-nbgp+1; i_right = nxr
401	! j_south = nys; j_north = nyn
402	! CALL prognostic_equations_acc
403
404	!
405	!-- Exchange of ghost points (lateral boundary conditions)
406	IF ( background_communication ) THEN
407
408	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
409
410	send_receive = 'lr'
411	sendrecv_in_background = .TRUE.
412	req = 0
413	req_count = 0
414
415	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
416	on_device = .TRUE. ! to be removed after complete porting
417	ELSE ! of ghost point exchange
418	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
419	ENDIF
420
421	CALL exchange_horiz( u_p, nbgp )
422	CALL exchange_horiz( v_p, nbgp )
423	CALL exchange_horiz( w_p, nbgp )
424	CALL exchange_horiz( pt_p, nbgp )
425	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
426	IF ( ocean ) THEN
427	CALL exchange_horiz( sa_p, nbgp )
428	CALL exchange_horiz( rho, nbgp )
429	CALL exchange_horiz( prho, nbgp )
430	ENDIF
431	IF (humidity .OR. passive_scalar) THEN
432	CALL exchange_horiz( q_p, nbgp )
433	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
434	CALL exchange_horiz( qr_p, nbgp )
435	CALL exchange_horiz( nr_p, nbgp )
436	ENDIF
437	ENDIF
438	IF ( cloud_droplets ) THEN
439	CALL exchange_horiz( ql, nbgp )
440	CALL exchange_horiz( ql_c, nbgp )
441	CALL exchange_horiz( ql_v, nbgp )
442	CALL exchange_horiz( ql_vp, nbgp )
443	ENDIF
444	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
445	THEN
446	CALL exchange_horiz( diss, nbgp )
447	ENDIF
448
449	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
450	on_device = .FALSE. ! to be removed after complete porting
451	ELSE ! of ghost point exchange
452	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
453	ENDIF
454
455	sendrecv_in_background = .FALSE.
456
457	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
458
459	ENDIF
460
461	! i_left = nxl+nbgp; i_right = nxr-nbgp
462	! j_south = nys; j_north = nys+nbgp-1
463	! CALL prognostic_equations_acc
464	! i_left = nxl+nbgp; i_right = nxr-nbgp
465	! j_south = nyn-nbgp+1; j_north = nyn
466	! CALL prognostic_equations_acc
467
468	IF ( background_communication ) THEN
469	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
470	#if defined( __parallel )
471	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
472	#endif
473	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
474
475	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
476
477	send_receive = 'ns'
478	sendrecv_in_background = .TRUE.
479	req = 0
480	req_count = 0
481
482	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
483	on_device = .TRUE. ! to be removed after complete porting
484	ELSE ! of ghost point exchange
485	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
486	ENDIF
487
488	CALL exchange_horiz( u_p, nbgp )
489	CALL exchange_horiz( v_p, nbgp )
490	CALL exchange_horiz( w_p, nbgp )
491	CALL exchange_horiz( pt_p, nbgp )
492	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
493	IF ( ocean ) THEN
494	CALL exchange_horiz( sa_p, nbgp )
495	CALL exchange_horiz( rho, nbgp )
496	CALL exchange_horiz( prho, nbgp )
497	ENDIF
498	IF (humidity .OR. passive_scalar) THEN
499	CALL exchange_horiz( q_p, nbgp )
500	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
501	CALL exchange_horiz( qr_p, nbgp )
502	CALL exchange_horiz( nr_p, nbgp )
503	ENDIF
504	ENDIF
505	IF ( cloud_droplets ) THEN
506	CALL exchange_horiz( ql, nbgp )
507	CALL exchange_horiz( ql_c, nbgp )
508	CALL exchange_horiz( ql_v, nbgp )
509	CALL exchange_horiz( ql_vp, nbgp )
510	ENDIF
511	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
512	THEN
513	CALL exchange_horiz( diss, nbgp )
514	ENDIF
515
516	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
517	on_device = .FALSE. ! to be removed after complete porting
518	ELSE ! of ghost point exchange
519	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
520	ENDIF
521
522	sendrecv_in_background = .FALSE.
523
524	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
525
526	ENDIF
527
528	! i_left = nxl+nbgp; i_right = nxr-nbgp
529	! j_south = nys+nbgp; j_north = nyn-nbgp
530	! CALL prognostic_equations_acc
531
532	IF ( background_communication ) THEN
533	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
534	#if defined( __parallel )
535	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
536	#endif
537	send_receive = 'al'
538	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
539	ENDIF
540
541	ENDIF
542
543	!
544	!-- Particle transport/physics with the Lagrangian particle model
545	!-- (only once during intermediate steps, because it uses an Euler-step)
546	!-- ### particle model should be moved before prognostic_equations, in order
547	!-- to regard droplet interactions directly
548	IF ( particle_advection .AND. &
549	simulated_time >= particle_advection_start .AND. &
550	intermediate_timestep_count == 1 ) THEN
551	CALL lpm
552	first_call_lpm = .FALSE.
553	ENDIF
554
555	!
556	!-- Interaction of droplets with temperature and specific humidity.
557	!-- Droplet condensation and evaporation is calculated within
558	!-- advec_particles.
559	IF ( cloud_droplets .AND. &
560	intermediate_timestep_count == intermediate_timestep_count_max )&
561	THEN
562	CALL interaction_droplets_ptq
563	ENDIF
564
565	!
566	!-- Exchange of ghost points (lateral boundary conditions)
567	IF ( .NOT. background_communication ) THEN
568
569	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
570
571	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
572	on_device = .TRUE. ! to be removed after complete porting
573	ELSE ! of ghost point exchange
574	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
575	ENDIF
576
577	CALL exchange_horiz( u_p, nbgp )
578	CALL exchange_horiz( v_p, nbgp )
579	CALL exchange_horiz( w_p, nbgp )
580	CALL exchange_horiz( pt_p, nbgp )
581	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
582	IF ( ocean ) THEN
583	CALL exchange_horiz( sa_p, nbgp )
584	CALL exchange_horiz( rho, nbgp )
585	CALL exchange_horiz( prho, nbgp )
586	ENDIF
587	IF (humidity .OR. passive_scalar) THEN
588	CALL exchange_horiz( q_p, nbgp )
589	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
590	precipitation ) THEN
591	CALL exchange_horiz( qr_p, nbgp )
592	CALL exchange_horiz( nr_p, nbgp )
593	ENDIF
594	ENDIF
595	IF ( cloud_droplets ) THEN
596	CALL exchange_horiz( ql, nbgp )
597	CALL exchange_horiz( ql_c, nbgp )
598	CALL exchange_horiz( ql_v, nbgp )
599	CALL exchange_horiz( ql_vp, nbgp )
600	ENDIF
601	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
602	THEN
603	CALL exchange_horiz( diss, nbgp )
604	ENDIF
605
606	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
607	on_device = .FALSE. ! to be removed after complete porting
608	ELSE ! of ghost point exchange
609	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
610	ENDIF
611
612	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
613
614	ENDIF
615
616	!
617	!-- Boundary conditions for the prognostic quantities (except of the
618	!-- velocities at the outflow in case of a non-cyclic lateral wall)
619	CALL boundary_conds
620
621	!
622	!-- Swap the time levels in preparation for the next time step.
623	CALL swap_timelevel
624
625	!
626	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
627	!-- when a sloping surface is used
628	IF ( sloping_surface ) THEN
629	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
630	pt_slope_offset
631	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
632	pt_slope_offset
633	ENDIF
634
635	!
636	!-- Impose a turbulent inflow using the recycling method
637	IF ( turbulent_inflow ) CALL inflow_turbulence
638
639	!
640	!-- Impose a random perturbation on the horizontal velocity field
641	IF ( create_disturbances .AND. &
642	( call_psolver_at_all_substeps .AND. &
643	intermediate_timestep_count == intermediate_timestep_count_max )&
644	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
645	intermediate_timestep_count == 1 ) ) &
646	THEN
647	time_disturb = time_disturb + dt_3d
648	IF ( time_disturb >= dt_disturb ) THEN
649	!$acc update host( u, v )
650	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
651	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
652	CALL disturb_field( nzb_u_inner, tend, u )
653	CALL disturb_field( nzb_v_inner, tend, v )
654	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
655	!
656	!-- Runs with a non-cyclic lateral wall need perturbations
657	!-- near the inflow throughout the whole simulation
658	dist_range = 1
659	CALL disturb_field( nzb_u_inner, tend, u )
660	CALL disturb_field( nzb_v_inner, tend, v )
661	dist_range = 0
662	ENDIF
663	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
664	!$acc update device( u, v )
665	time_disturb = time_disturb - dt_disturb
666	ENDIF
667	ENDIF
668
669	!
670	!-- Reduce the velocity divergence via the equation for perturbation
671	!-- pressure.
672	IF ( intermediate_timestep_count == 1 .OR. &
673	call_psolver_at_all_substeps ) THEN
674	CALL pres
675	ENDIF
676
677	!
678	!-- If required, compute liquid water content
679	IF ( cloud_physics ) THEN
680	CALL calc_liquid_water_content
681	!$acc update device( ql )
682	ENDIF
683	!
684	!-- If required, compute virtual potential temperature
685	IF ( humidity ) THEN
686	CALL compute_vpt
687	!$acc update device( vpt )
688	ENDIF
689
690	!
691	!-- Compute the diffusion quantities
692	IF ( .NOT. constant_diffusion ) THEN
693
694	!
695	!-- Determine surface fluxes shf and qsws and surface values
696	!-- pt_surface and q_surface in dependence on data from external
697	!-- file LSF_DATA respectively
698	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
699	intermediate_timestep_count == intermediate_timestep_count_max )&
700	THEN
701	CALL ls_forcing_surf ( simulated_time )
702	ENDIF
703
704	!
705	!-- First the vertical fluxes in the surface (constant flux) layer are computed
706	IF ( constant_flux_layer ) THEN
707	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
708	CALL surface_layer_fluxes
709	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
710	ENDIF
711
712	!
713	!-- If required, solve the energy balance for the surface and run soil
714	!-- model
715	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
716
717	CALL cpu_log( log_point(54), 'land_surface', 'start' )
718	CALL lsm_energy_balance
719	CALL lsm_soil_model
720	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
721	ENDIF
722	!
723	!-- Compute the diffusion coefficients
724	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
725	IF ( .NOT. humidity ) THEN
726	IF ( ocean ) THEN
727	CALL diffusivities( prho, prho_reference )
728	ELSE
729	CALL diffusivities( pt, pt_reference )
730	ENDIF
731	ELSE
732	CALL diffusivities( vpt, pt_reference )
733	ENDIF
734	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
735
736	ENDIF
737
738	!
739	!-- If required, calculate radiative fluxes and heating rates
740	IF ( radiation .AND. intermediate_timestep_count &
741	== intermediate_timestep_count_max .AND. simulated_time > &
742	skip_time_do_radiation ) THEN
743
744	time_radiation = time_radiation + dt_3d
745
746	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
747	THEN
748
749	CALL cpu_log( log_point(50), 'radiation', 'start' )
750
751	IF ( .NOT. force_radiation_call ) THEN
752	time_radiation = time_radiation - dt_radiation
753	ELSE
754	WRITE(9,*) "Unscheduled radiation call at ", simulated_time
755	CALL LOCAL_FLUSH ( 9 )
756	ENDIF
757
758	IF ( radiation_scheme == 'clear-sky' ) THEN
759	CALL radiation_clearsky
760	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
761	CALL radiation_rrtmg
762	ENDIF
763
764	CALL cpu_log( log_point(50), 'radiation', 'stop' )
765	ENDIF
766	ENDIF
767
768	ENDDO ! Intermediate step loop
769
770	!
771	!-- Increase simulation time and output times
772	nr_timesteps_this_run = nr_timesteps_this_run + 1
773	current_timestep_number = current_timestep_number + 1
774	simulated_time = simulated_time + dt_3d
775	simulated_time_chr = time_to_string( simulated_time )
776	time_since_reference_point = simulated_time - coupling_start_time
777
778	IF ( simulated_time >= skip_time_data_output_av ) THEN
779	time_do_av = time_do_av + dt_3d
780	ENDIF
781	IF ( simulated_time >= skip_time_do2d_xy ) THEN
782	time_do2d_xy = time_do2d_xy + dt_3d
783	ENDIF
784	IF ( simulated_time >= skip_time_do2d_xz ) THEN
785	time_do2d_xz = time_do2d_xz + dt_3d
786	ENDIF
787	IF ( simulated_time >= skip_time_do2d_yz ) THEN
788	time_do2d_yz = time_do2d_yz + dt_3d
789	ENDIF
790	IF ( simulated_time >= skip_time_do3d ) THEN
791	time_do3d = time_do3d + dt_3d
792	ENDIF
793	DO mid = 1, masks
794	IF ( simulated_time >= skip_time_domask(mid) ) THEN
795	time_domask(mid)= time_domask(mid) + dt_3d
796	ENDIF
797	ENDDO
798	time_dvrp = time_dvrp + dt_3d
799	IF ( simulated_time >= skip_time_dosp ) THEN
800	time_dosp = time_dosp + dt_3d
801	ENDIF
802	time_dots = time_dots + dt_3d
803	IF ( .NOT. first_call_lpm ) THEN
804	time_dopts = time_dopts + dt_3d
805	ENDIF
806	IF ( simulated_time >= skip_time_dopr ) THEN
807	time_dopr = time_dopr + dt_3d
808	ENDIF
809	time_dopr_listing = time_dopr_listing + dt_3d
810	time_run_control = time_run_control + dt_3d
811
812	!
813	!-- Data exchange between coupled models
814	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
815	time_coupling = time_coupling + dt_3d
816
817	!
818	!-- In case of model termination initiated by the local model
819	!-- (terminate_coupled > 0), the coupler must be skipped because it would
820	!-- cause an MPI intercomminucation hang.
821	!-- If necessary, the coupler will be called at the beginning of the
822	!-- next restart run.
823	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
824	CALL surface_coupler
825	time_coupling = time_coupling - dt_coupling
826	ENDDO
827	ENDIF
828
829	!
830	!-- Execute user-defined actions
831	CALL user_actions( 'after_integration' )
832
833	!
834	!-- If Galilei transformation is used, determine the distance that the
835	!-- model has moved so far
836	IF ( galilei_transformation ) THEN
837	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
838	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
839	ENDIF
840
841	!
842	!-- Check, if restart is necessary (because cpu-time is expiring or
843	!-- because it is forced by user) and set stop flag
844	!-- This call is skipped if the remote model has already initiated a restart.
845	IF ( .NOT. terminate_run ) CALL check_for_restart
846
847	!
848	!-- Carry out statistical analysis and output at the requested output times.
849	!-- The MOD function is used for calculating the output time counters (like
850	!-- time_dopr) in order to regard a possible decrease of the output time
851	!-- interval in case of restart runs
852
853	!
854	!-- Set a flag indicating that so far no statistics have been created
855	!-- for this time step
856	flow_statistics_called = .FALSE.
857
858	!
859	!-- If required, call flow_statistics for averaging in time
860	IF ( averaging_interval_pr /= 0.0_wp .AND. &
861	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
862	simulated_time >= skip_time_dopr ) THEN
863	time_dopr_av = time_dopr_av + dt_3d
864	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
865	do_sum = .TRUE.
866	time_dopr_av = MOD( time_dopr_av, &
867	MAX( dt_averaging_input_pr, dt_3d ) )
868	ENDIF
869	ENDIF
870	IF ( do_sum ) CALL flow_statistics
871
872	!
873	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
874	IF ( averaging_interval /= 0.0_wp .AND. &
875	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
876	simulated_time >= skip_time_data_output_av ) &
877	THEN
878	time_do_sla = time_do_sla + dt_3d
879	IF ( time_do_sla >= dt_averaging_input ) THEN
880	CALL sum_up_3d_data
881	average_count_3d = average_count_3d + 1
882	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
883	ENDIF
884	ENDIF
885
886	!
887	!-- Calculate spectra for time averaging
888	IF ( averaging_interval_sp /= 0.0_wp .AND. &
889	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
890	simulated_time >= skip_time_dosp ) THEN
891	time_dosp_av = time_dosp_av + dt_3d
892	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
893	CALL calc_spectra
894	time_dosp_av = MOD( time_dosp_av, &
895	MAX( dt_averaging_input_pr, dt_3d ) )
896	ENDIF
897	ENDIF
898
899	!
900	!-- Computation and output of run control parameters.
901	!-- This is also done whenever perturbations have been imposed
902	IF ( time_run_control >= dt_run_control .OR. &
903	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
904	THEN
905	CALL run_control
906	IF ( time_run_control >= dt_run_control ) THEN
907	time_run_control = MOD( time_run_control, &
908	MAX( dt_run_control, dt_3d ) )
909	ENDIF
910	ENDIF
911
912	!
913	!-- Profile output (ASCII) on file
914	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
915	CALL print_1d
916	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
917	dt_3d ) )
918	ENDIF
919
920	!
921	!-- Graphic output for PROFIL
922	IF ( time_dopr >= dt_dopr ) THEN
923	IF ( dopr_n /= 0 ) CALL data_output_profiles
924	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
925	time_dopr_av = 0.0_wp ! due to averaging (see above)
926	ENDIF
927
928	!
929	!-- Graphic output for time series
930	IF ( time_dots >= dt_dots ) THEN
931	CALL data_output_tseries
932	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
933	ENDIF
934
935	!
936	!-- Output of spectra (formatted for use with PROFIL), in case of no
937	!-- time averaging, spectra has to be calculated before
938	IF ( time_dosp >= dt_dosp ) THEN
939	IF ( average_count_sp == 0 ) CALL calc_spectra
940	CALL data_output_spectra
941	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
942	ENDIF
943
944	!
945	!-- 2d-data output (cross-sections)
946	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
947	CALL data_output_2d( 'xy', 0 )
948	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
949	ENDIF
950	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
951	CALL data_output_2d( 'xz', 0 )
952	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
953	ENDIF
954	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
955	CALL data_output_2d( 'yz', 0 )
956	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
957	ENDIF
958
959	!
960	!-- 3d-data output (volume data)
961	IF ( time_do3d >= dt_do3d ) THEN
962	CALL data_output_3d( 0 )
963	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
964	ENDIF
965
966	!
967	!-- masked data output
968	!-- Parallel netcdf output is not tested so far for masked data, hence
969	!-- netcdf_data_format is switched back to non-paralell output.
970	netcdf_data_format_save = netcdf_data_format
971	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
972	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
973	DO mid = 1, masks
974	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
975	CALL data_output_mask( 0 )
976	time_domask(mid) = MOD( time_domask(mid), &
977	MAX( dt_domask(mid), dt_3d ) )
978	ENDIF
979	ENDDO
980	netcdf_data_format = netcdf_data_format_save
981
982	!
983	!-- Output of time-averaged 2d/3d/masked data
984	IF ( time_do_av >= dt_data_output_av ) THEN
985	CALL average_3d_data
986	CALL data_output_2d( 'xy', 1 )
987	CALL data_output_2d( 'xz', 1 )
988	CALL data_output_2d( 'yz', 1 )
989	CALL data_output_3d( 1 )
990	!-- Parallel netcdf output is not tested so far for masked data, hence
991	!-- netcdf_data_format is switched back to non-paralell output.
992	netcdf_data_format_save = netcdf_data_format
993	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
994	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
995	DO mid = 1, masks
996	CALL data_output_mask( 1 )
997	ENDDO
998	netcdf_data_format = netcdf_data_format_save
999	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
1000	ENDIF
1001
1002	!
1003	!-- Output of particle time series
1004	IF ( particle_advection ) THEN
1005	IF ( time_dopts >= dt_dopts .OR. &
1006	( simulated_time >= particle_advection_start .AND. &
1007	first_call_lpm ) ) THEN
1008	CALL data_output_ptseries
1009	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
1010	ENDIF
1011	ENDIF
1012
1013	!
1014	!-- Output of dvrp-graphics (isosurface, particles, slicer)
1015	#if defined( __dvrp_graphics )
1016	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
1017	#endif
1018	IF ( time_dvrp >= dt_dvrp ) THEN
1019	CALL data_output_dvrp
1020	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
1021	ENDIF
1022	#if defined( __dvrp_graphics )
1023	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
1024	#endif
1025
1026	!
1027	!-- If required, set the heat flux for the next time step at a random value
1028	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
1029
1030	!
1031	!-- Execute user-defined actions
1032	CALL user_actions( 'after_timestep' )
1033
1034	!
1035	!-- Output elapsed simulated time in form of a progress bar on stdout
1036	IF ( myid == 0 ) CALL output_progress_bar
1037
1038	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
1039
1040
1041	ENDDO ! time loop
1042
1043	IF ( myid == 0 ) CALL finish_progress_bar
1044
1045	#if defined( __dvrp_graphics )
1046	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
1047	#endif
1048
1049	CALL location_message( 'finished time-stepping', .TRUE. )
1050
1051	END SUBROUTINE time_integration

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