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source: palm/trunk/SOURCE/time_integration.f90 @ 1344

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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 1343 2014-03-26 17:07:58Z kanani $
27	!
28	! 1342 2014-03-26 17:04:47Z kanani
29	! REAL constants defined as wp-kind
30	!
31	! 1320 2014-03-20 08:40:49Z raasch
32	! ONLY-attribute added to USE-statements,
33	! kind-parameters added to all INTEGER and REAL declaration statements,
34	! kinds are defined in new module kinds,
35	! old module precision_kind is removed,
36	! revision history before 2012 removed,
37	! comment fields (!:) to be used for variable explanations added to
38	! all variable declaration statements
39	! 1318 2014-03-17 13:35:16Z raasch
40	! module interfaces removed
41	!
42	! 1308 2014-03-13 14:58:42Z fricke
43	! +netcdf_data_format_save
44	! For masked data, parallel netcdf output is not tested so far, hence
45	! netcdf_data_format is switched back to non-paralell output.
46	!
47	! 1276 2014-01-15 13:40:41Z heinze
48	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
49	!
50	! 1257 2013-11-08 15:18:40Z raasch
51	! acc-update-host directive for timestep removed
52	!
53	! 1241 2013-10-30 11:36:58Z heinze
54	! Generalize calc_mean_profile for wider use
55	! Determine shf and qsws in dependence on data from LSF_DATA
56	! Determine ug and vg in dependence on data from LSF_DATA
57	! 1221 2013-09-10 08:59:13Z raasch
58	! host update of arrays before timestep is called
59	!
60	! 1179 2013-06-14 05:57:58Z raasch
61	! mean profiles for reference state are only calculated if required,
62	! small bugfix for background communication
63	!
64	! 1171 2013-05-30 11:27:45Z raasch
65	! split of prognostic_equations deactivated (comment lines), for the time being
66	!
67	! 1128 2013-04-12 06:19:32Z raasch
68	! asynchronous transfer of ghost point data realized for acc-optimized version:
69	! prognostic_equations are first called two times for those points required for
70	! the left-right and north-south exchange, respectively, and then for the
71	! remaining points,
72	! those parts requiring global communication moved from prognostic_equations to
73	! here
74	!
75	! 1115 2013-03-26 18:16:16Z hoffmann
76	! calculation of qr and nr is restricted to precipitation
77	!
78	! 1113 2013-03-10 02:48:14Z raasch
79	! GPU-porting of boundary conditions,
80	! openACC directives updated
81	! formal parameter removed from routine boundary_conds
82	!
83	! 1111 2013-03-08 23:54:10Z raasch
84	! +internal timestep counter for cpu statistics added,
85	! openACC directives updated
86	!
87	! 1092 2013-02-02 11:24:22Z raasch
88	! unused variables removed
89	!
90	! 1065 2012-11-22 17:42:36Z hoffmann
91	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
92	!
93	! 1053 2012-11-13 17:11:03Z hoffmann
94	! exchange of ghost points for nr, qr added
95	!
96	! 1036 2012-10-22 13:43:42Z raasch
97	! code put under GPL (PALM 3.9)
98	!
99	! 1019 2012-09-28 06:46:45Z raasch
100	! non-optimized version of prognostic_equations removed
101	!
102	! 1015 2012-09-27 09:23:24Z raasch
103	! +call of prognostic_equations_acc
104	!
105	! 1001 2012-09-13 14:08:46Z raasch
106	! all actions concerning leapfrog- and upstream-spline-scheme removed
107	!
108	! 849 2012-03-15 10:35:09Z raasch
109	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
110	!
111	! 825 2012-02-19 03:03:44Z raasch
112	! wang_collision_kernel renamed wang_kernel
113	!
114	! Revision 1.1 1997/08/11 06:19:04 raasch
115	! Initial revision
116	!
117	!
118	! Description:
119	! ------------
120	! Integration in time of the model equations, statistical analysis and graphic
121	! output
122	!------------------------------------------------------------------------------!
123
124	USE advec_ws, &
125	ONLY: ws_statistics
126
127	USE arrays_3d, &
128	ONLY: diss, e_p, nr_p, prho, pt, pt_p, ql, ql_c, ql_v, ql_vp, qr_p, &
129	q_p, rho, sa_p, tend, u, u_p, v, vpt, v_p, w_p
130
131	USE buoyancy_mod, &
132	ONLY: calc_mean_profile
133
134	USE control_parameters, &
135	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
136	average_count_sp, averaging_interval, averaging_interval_pr, &
137	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, &
138	call_psolver_at_all_substeps, cloud_droplets, cloud_physics, &
139	constant_heatflux, create_disturbances, dopr_n, &
140	constant_diffusion, coupling_mode, coupling_start_time, &
141	current_timestep_number, disturbance_created, &
142	disturbance_energy_limit, dist_range, do_sum, dt_3d, &
143	dt_averaging_input, dt_averaging_input_pr, dt_coupling, &
144	dt_data_output_av, dt_disturb, dt_do2d_xy, dt_do2d_xz, &
145	dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
146	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
147	end_time, first_call_lpm, galilei_transformation, humidity, &
148	icloud_scheme, intermediate_timestep_count, &
149	intermediate_timestep_count_max, large_scale_forcing, &
150	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
151	netcdf_data_format, neutral, nr_timesteps_this_run, ocean, &
152	on_device, passive_scalar, prandtl_layer, precipitation, &
153	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
154	run_coupled, simulated_time, simulated_time_chr, &
155	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
156	skip_time_do3d, skip_time_domask, skip_time_dopr, &
157	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
158	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
159	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
160	time_do3d, time_domask, time_dopr, time_dopr_av, &
161	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
162	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
163	time_run_control, time_since_reference_point, turbulence, &
164	turbulent_inflow, use_initial_profile_as_reference, &
165	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
166	ws_scheme_sca
167
168	USE cpulog, &
169	ONLY: cpu_log, log_point, log_point_s
170
171	USE indices, &
172	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
173	nxrg, nyn, nys, nzb, nzb_u_inner, nzb_v_inner
174
175	USE interaction_droplets_ptq_mod, &
176	ONLY: interaction_droplets_ptq
177
178	USE kinds
179
180	USE ls_forcing_mod, &
181	ONLY: ls_forcing_surf, ls_forcing_vert
182
183	USE particle_attributes, &
184	ONLY: particle_advection, particle_advection_start, wang_kernel
185
186	USE pegrid
187
188	USE production_e_mod, &
189	ONLY: production_e_init
190
191	USE prognostic_equations_mod, &
192	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
193	prognostic_equations_vector
194
195	USE statistics, &
196	ONLY: flow_statistics_called, hom, pr_palm
197
198	USE user_actions_mod, &
199	ONLY: user_actions
200
201	IMPLICIT NONE
202
203	CHARACTER (LEN=9) :: time_to_string !:
204
205	INTEGER(iwp) :: netcdf_data_format_save !:
206
207	!
208	!-- At the beginning of a simulation determine the time step as well as
209	!-- determine and print out the run control parameters
210	IF ( simulated_time == 0.0_wp ) CALL timestep
211
212	CALL run_control
213
214
215	!
216	!-- Data exchange between coupled models in case that a call has been omitted
217	!-- at the end of the previous run of a job chain.
218	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
219	!
220	!-- In case of model termination initiated by the local model the coupler
221	!-- must not be called because this would again cause an MPI hang.
222	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
223	CALL surface_coupler
224	time_coupling = time_coupling - dt_coupling
225	ENDDO
226	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
227	THEN
228	time_coupling = time_since_reference_point
229	ENDIF
230	ENDIF
231
232
233	#if defined( __dvrp_graphics )
234	!
235	!-- Time measurement with dvrp software
236	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
237	#endif
238
239	!
240	!-- Start of the time loop
241	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
242	.NOT. terminate_run )
243
244	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
245
246	!
247	!-- Determine size of next time step
248	IF ( simulated_time /= 0.0_wp ) THEN
249	CALL timestep
250	ENDIF
251
252	!
253	!-- Determine ug, vg and w_subs in dependence on data from external file
254	!-- LSF_DATA
255	IF ( large_scale_forcing .AND. lsf_vert ) THEN
256	CALL ls_forcing_vert ( simulated_time )
257	ENDIF
258
259	!
260	!-- Execute the user-defined actions
261	CALL user_actions( 'before_timestep' )
262
263	!
264	!-- Start of intermediate step loop
265	intermediate_timestep_count = 0
266	DO WHILE ( intermediate_timestep_count < &
267	intermediate_timestep_count_max )
268
269	intermediate_timestep_count = intermediate_timestep_count + 1
270
271	!
272	!-- Set the steering factors for the prognostic equations which depend
273	!-- on the timestep scheme
274	CALL timestep_scheme_steering
275
276	!
277	!-- Calculate those variables needed in the tendency terms which need
278	!-- global communication
279	IF ( .NOT. use_single_reference_value .AND. &
280	.NOT. use_initial_profile_as_reference ) THEN
281	!
282	!-- Horizontally averaged profiles to be used as reference state in
283	!-- buoyancy terms (WARNING: only the respective last call of
284	!-- calc_mean_profile defines the reference state!)
285	IF ( .NOT. neutral ) CALL calc_mean_profile( pt, 4, 'time_int' )
286	IF ( ocean ) CALL calc_mean_profile( rho, 64, 'time_int' )
287	IF ( humidity ) CALL calc_mean_profile( vpt, 44, 'time_int' )
288	ENDIF
289
290	IF ( .NOT. constant_diffusion ) CALL production_e_init
291	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
292	intermediate_timestep_count == 1 ) CALL ws_statistics
293
294	!
295	!-- Solve the prognostic equations. A fast cache optimized version with
296	!-- only one single loop is used in case of Piascek-Williams advection
297	!-- scheme. NEC vector machines use a different version, because
298	!-- in the other versions a good vectorization is prohibited due to
299	!-- inlining problems.
300	IF ( loop_optimization == 'cache' ) THEN
301	CALL prognostic_equations_cache
302	ELSEIF ( loop_optimization == 'vector' ) THEN
303	CALL prognostic_equations_vector
304	ELSEIF ( loop_optimization == 'acc' ) THEN
305	i_left = nxl; i_right = nxr
306	j_south = nys; j_north = nyn
307	CALL prognostic_equations_acc
308
309	! i_left = nxl; i_right = nxl+nbgp-1
310	! j_south = nys; j_north = nyn
311	! CALL prognostic_equations_acc
312	! i_left = nxr-nbgp+1; i_right = nxr
313	! j_south = nys; j_north = nyn
314	! CALL prognostic_equations_acc
315
316	!
317	!-- Exchange of ghost points (lateral boundary conditions)
318	IF ( background_communication ) THEN
319
320	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
321
322	send_receive = 'lr'
323	sendrecv_in_background = .TRUE.
324	req = 0
325	req_count = 0
326
327	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
328	on_device = .TRUE. ! to be removed after complete porting
329	ELSE ! of ghost point exchange
330	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
331	ENDIF
332
333	CALL exchange_horiz( u_p, nbgp )
334	CALL exchange_horiz( v_p, nbgp )
335	CALL exchange_horiz( w_p, nbgp )
336	CALL exchange_horiz( pt_p, nbgp )
337	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
338	IF ( ocean ) THEN
339	CALL exchange_horiz( sa_p, nbgp )
340	CALL exchange_horiz( rho, nbgp )
341	CALL exchange_horiz( prho, nbgp )
342	ENDIF
343	IF (humidity .OR. passive_scalar) THEN
344	CALL exchange_horiz( q_p, nbgp )
345	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
346	CALL exchange_horiz( qr_p, nbgp )
347	CALL exchange_horiz( nr_p, nbgp )
348	ENDIF
349	ENDIF
350	IF ( cloud_droplets ) THEN
351	CALL exchange_horiz( ql, nbgp )
352	CALL exchange_horiz( ql_c, nbgp )
353	CALL exchange_horiz( ql_v, nbgp )
354	CALL exchange_horiz( ql_vp, nbgp )
355	ENDIF
356	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
357
358	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
359	on_device = .FALSE. ! to be removed after complete porting
360	ELSE ! of ghost point exchange
361	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
362	ENDIF
363
364	sendrecv_in_background = .FALSE.
365
366	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
367
368	ENDIF
369
370	! i_left = nxl+nbgp; i_right = nxr-nbgp
371	! j_south = nys; j_north = nys+nbgp-1
372	! CALL prognostic_equations_acc
373	! i_left = nxl+nbgp; i_right = nxr-nbgp
374	! j_south = nyn-nbgp+1; j_north = nyn
375	! CALL prognostic_equations_acc
376
377	IF ( background_communication ) THEN
378	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
379	#if defined( __parallel )
380	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
381	#endif
382	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
383
384	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
385
386	send_receive = 'ns'
387	sendrecv_in_background = .TRUE.
388	req = 0
389	req_count = 0
390
391	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
392	on_device = .TRUE. ! to be removed after complete porting
393	ELSE ! of ghost point exchange
394	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
395	ENDIF
396
397	CALL exchange_horiz( u_p, nbgp )
398	CALL exchange_horiz( v_p, nbgp )
399	CALL exchange_horiz( w_p, nbgp )
400	CALL exchange_horiz( pt_p, nbgp )
401	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
402	IF ( ocean ) THEN
403	CALL exchange_horiz( sa_p, nbgp )
404	CALL exchange_horiz( rho, nbgp )
405	CALL exchange_horiz( prho, nbgp )
406	ENDIF
407	IF (humidity .OR. passive_scalar) THEN
408	CALL exchange_horiz( q_p, nbgp )
409	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
410	CALL exchange_horiz( qr_p, nbgp )
411	CALL exchange_horiz( nr_p, nbgp )
412	ENDIF
413	ENDIF
414	IF ( cloud_droplets ) THEN
415	CALL exchange_horiz( ql, nbgp )
416	CALL exchange_horiz( ql_c, nbgp )
417	CALL exchange_horiz( ql_v, nbgp )
418	CALL exchange_horiz( ql_vp, nbgp )
419	ENDIF
420	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
421
422	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
423	on_device = .FALSE. ! to be removed after complete porting
424	ELSE ! of ghost point exchange
425	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
426	ENDIF
427
428	sendrecv_in_background = .FALSE.
429
430	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
431
432	ENDIF
433
434	! i_left = nxl+nbgp; i_right = nxr-nbgp
435	! j_south = nys+nbgp; j_north = nyn-nbgp
436	! CALL prognostic_equations_acc
437
438	IF ( background_communication ) THEN
439	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
440	#if defined( __parallel )
441	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
442	#endif
443	send_receive = 'al'
444	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
445	ENDIF
446
447	ENDIF
448
449	!
450	!-- Particle transport/physics with the Lagrangian particle model
451	!-- (only once during intermediate steps, because it uses an Euler-step)
452	!-- ### particle model should be moved before prognostic_equations, in order
453	!-- to regard droplet interactions directly
454	IF ( particle_advection .AND. &
455	simulated_time >= particle_advection_start .AND. &
456	intermediate_timestep_count == 1 ) THEN
457	CALL lpm
458	first_call_lpm = .FALSE.
459	ENDIF
460
461	!
462	!-- Interaction of droplets with temperature and specific humidity.
463	!-- Droplet condensation and evaporation is calculated within
464	!-- advec_particles.
465	IF ( cloud_droplets .AND. &
466	intermediate_timestep_count == intermediate_timestep_count_max )&
467	THEN
468	CALL interaction_droplets_ptq
469	ENDIF
470
471	!
472	!-- Exchange of ghost points (lateral boundary conditions)
473	IF ( .NOT. background_communication ) THEN
474
475	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
476
477	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
478	on_device = .TRUE. ! to be removed after complete porting
479	ELSE ! of ghost point exchange
480	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
481	ENDIF
482
483	CALL exchange_horiz( u_p, nbgp )
484	CALL exchange_horiz( v_p, nbgp )
485	CALL exchange_horiz( w_p, nbgp )
486	CALL exchange_horiz( pt_p, nbgp )
487	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
488	IF ( ocean ) THEN
489	CALL exchange_horiz( sa_p, nbgp )
490	CALL exchange_horiz( rho, nbgp )
491	CALL exchange_horiz( prho, nbgp )
492	ENDIF
493	IF (humidity .OR. passive_scalar) THEN
494	CALL exchange_horiz( q_p, nbgp )
495	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
496	precipitation ) THEN
497	CALL exchange_horiz( qr_p, nbgp )
498	CALL exchange_horiz( nr_p, nbgp )
499	ENDIF
500	ENDIF
501	IF ( cloud_droplets ) THEN
502	CALL exchange_horiz( ql, nbgp )
503	CALL exchange_horiz( ql_c, nbgp )
504	CALL exchange_horiz( ql_v, nbgp )
505	CALL exchange_horiz( ql_vp, nbgp )
506	ENDIF
507	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
508
509	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
510	on_device = .FALSE. ! to be removed after complete porting
511	ELSE ! of ghost point exchange
512	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
513	ENDIF
514
515	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
516
517	ENDIF
518
519	!
520	!-- Boundary conditions for the prognostic quantities (except of the
521	!-- velocities at the outflow in case of a non-cyclic lateral wall)
522	CALL boundary_conds
523
524	!
525	!-- Swap the time levels in preparation for the next time step.
526	CALL swap_timelevel
527
528	!
529	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
530	!-- when a sloping surface is used
531	IF ( sloping_surface ) THEN
532	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
533	pt_slope_offset
534	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
535	pt_slope_offset
536	ENDIF
537
538	!
539	!-- Impose a turbulent inflow using the recycling method
540	IF ( turbulent_inflow ) CALL inflow_turbulence
541
542	!
543	!-- Impose a random perturbation on the horizontal velocity field
544	IF ( create_disturbances .AND. &
545	( call_psolver_at_all_substeps .AND. &
546	intermediate_timestep_count == intermediate_timestep_count_max )&
547	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
548	intermediate_timestep_count == 1 ) ) &
549	THEN
550	time_disturb = time_disturb + dt_3d
551	IF ( time_disturb >= dt_disturb ) THEN
552	!$acc update host( u, v )
553	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
554	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
555	CALL disturb_field( nzb_u_inner, tend, u )
556	CALL disturb_field( nzb_v_inner, tend, v )
557	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
558	!
559	!-- Runs with a non-cyclic lateral wall need perturbations
560	!-- near the inflow throughout the whole simulation
561	dist_range = 1
562	CALL disturb_field( nzb_u_inner, tend, u )
563	CALL disturb_field( nzb_v_inner, tend, v )
564	dist_range = 0
565	ENDIF
566	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
567	!$acc update device( u, v )
568	time_disturb = time_disturb - dt_disturb
569	ENDIF
570	ENDIF
571
572	!
573	!-- Reduce the velocity divergence via the equation for perturbation
574	!-- pressure.
575	IF ( intermediate_timestep_count == 1 .OR. &
576	call_psolver_at_all_substeps ) THEN
577	CALL pres
578	ENDIF
579
580	!
581	!-- If required, compute liquid water content
582	IF ( cloud_physics ) THEN
583	CALL calc_liquid_water_content
584	!$acc update device( ql )
585	ENDIF
586	!
587	!-- If required, compute virtual potential temperature
588	IF ( humidity ) THEN
589	CALL compute_vpt
590	!$acc update device( vpt )
591	ENDIF
592	!
593	!-- Compute the diffusion quantities
594	IF ( .NOT. constant_diffusion ) THEN
595
596	!
597	!-- Determine surface fluxes shf and qsws and surface values
598	!-- pt_surface and q_surface in dependence on data from external
599	!-- file LSF_DATA respectively
600	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
601	intermediate_timestep_count == intermediate_timestep_count_max )&
602	THEN
603	CALL ls_forcing_surf ( simulated_time )
604	ENDIF
605
606	!
607	!-- First the vertical fluxes in the Prandtl layer are being computed
608	IF ( prandtl_layer ) THEN
609	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
610	CALL prandtl_fluxes
611	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
612	ENDIF
613
614	!
615	!-- Compute the diffusion coefficients
616	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
617	IF ( .NOT. humidity ) THEN
618	IF ( ocean ) THEN
619	CALL diffusivities( prho, prho_reference )
620	ELSE
621	CALL diffusivities( pt, pt_reference )
622	ENDIF
623	ELSE
624	CALL diffusivities( vpt, pt_reference )
625	ENDIF
626	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
627
628	ENDIF
629
630	ENDDO ! Intermediate step loop
631
632	!
633	!-- Increase simulation time and output times
634	nr_timesteps_this_run = nr_timesteps_this_run + 1
635	current_timestep_number = current_timestep_number + 1
636	simulated_time = simulated_time + dt_3d
637	simulated_time_chr = time_to_string( simulated_time )
638	time_since_reference_point = simulated_time - coupling_start_time
639
640	IF ( simulated_time >= skip_time_data_output_av ) THEN
641	time_do_av = time_do_av + dt_3d
642	ENDIF
643	IF ( simulated_time >= skip_time_do2d_xy ) THEN
644	time_do2d_xy = time_do2d_xy + dt_3d
645	ENDIF
646	IF ( simulated_time >= skip_time_do2d_xz ) THEN
647	time_do2d_xz = time_do2d_xz + dt_3d
648	ENDIF
649	IF ( simulated_time >= skip_time_do2d_yz ) THEN
650	time_do2d_yz = time_do2d_yz + dt_3d
651	ENDIF
652	IF ( simulated_time >= skip_time_do3d ) THEN
653	time_do3d = time_do3d + dt_3d
654	ENDIF
655	DO mid = 1, masks
656	IF ( simulated_time >= skip_time_domask(mid) ) THEN
657	time_domask(mid)= time_domask(mid) + dt_3d
658	ENDIF
659	ENDDO
660	time_dvrp = time_dvrp + dt_3d
661	IF ( simulated_time >= skip_time_dosp ) THEN
662	time_dosp = time_dosp + dt_3d
663	ENDIF
664	time_dots = time_dots + dt_3d
665	IF ( .NOT. first_call_lpm ) THEN
666	time_dopts = time_dopts + dt_3d
667	ENDIF
668	IF ( simulated_time >= skip_time_dopr ) THEN
669	time_dopr = time_dopr + dt_3d
670	ENDIF
671	time_dopr_listing = time_dopr_listing + dt_3d
672	time_run_control = time_run_control + dt_3d
673
674	!
675	!-- Data exchange between coupled models
676	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
677	time_coupling = time_coupling + dt_3d
678
679	!
680	!-- In case of model termination initiated by the local model
681	!-- (terminate_coupled > 0), the coupler must be skipped because it would
682	!-- cause an MPI intercomminucation hang.
683	!-- If necessary, the coupler will be called at the beginning of the
684	!-- next restart run.
685	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
686	CALL surface_coupler
687	time_coupling = time_coupling - dt_coupling
688	ENDDO
689	ENDIF
690
691	!
692	!-- Execute user-defined actions
693	CALL user_actions( 'after_integration' )
694
695	!
696	!-- If Galilei transformation is used, determine the distance that the
697	!-- model has moved so far
698	IF ( galilei_transformation ) THEN
699	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
700	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
701	ENDIF
702
703	!
704	!-- Check, if restart is necessary (because cpu-time is expiring or
705	!-- because it is forced by user) and set stop flag
706	!-- This call is skipped if the remote model has already initiated a restart.
707	IF ( .NOT. terminate_run ) CALL check_for_restart
708
709	!
710	!-- Carry out statistical analysis and output at the requested output times.
711	!-- The MOD function is used for calculating the output time counters (like
712	!-- time_dopr) in order to regard a possible decrease of the output time
713	!-- interval in case of restart runs
714
715	!
716	!-- Set a flag indicating that so far no statistics have been created
717	!-- for this time step
718	flow_statistics_called = .FALSE.
719
720	!
721	!-- If required, call flow_statistics for averaging in time
722	IF ( averaging_interval_pr /= 0.0_wp .AND. &
723	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
724	simulated_time >= skip_time_dopr ) THEN
725	time_dopr_av = time_dopr_av + dt_3d
726	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
727	do_sum = .TRUE.
728	time_dopr_av = MOD( time_dopr_av, &
729	MAX( dt_averaging_input_pr, dt_3d ) )
730	ENDIF
731	ENDIF
732	IF ( do_sum ) CALL flow_statistics
733
734	!
735	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
736	IF ( averaging_interval /= 0.0_wp .AND. &
737	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
738	simulated_time >= skip_time_data_output_av ) &
739	THEN
740	time_do_sla = time_do_sla + dt_3d
741	IF ( time_do_sla >= dt_averaging_input ) THEN
742	CALL sum_up_3d_data
743	average_count_3d = average_count_3d + 1
744	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
745	ENDIF
746	ENDIF
747
748	!
749	!-- Calculate spectra for time averaging
750	IF ( averaging_interval_sp /= 0.0_wp .AND. &
751	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
752	simulated_time >= skip_time_dosp ) THEN
753	time_dosp_av = time_dosp_av + dt_3d
754	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
755	CALL calc_spectra
756	time_dosp_av = MOD( time_dosp_av, &
757	MAX( dt_averaging_input_pr, dt_3d ) )
758	ENDIF
759	ENDIF
760
761	!
762	!-- Computation and output of run control parameters.
763	!-- This is also done whenever perturbations have been imposed
764	IF ( time_run_control >= dt_run_control .OR. &
765	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
766	THEN
767	CALL run_control
768	IF ( time_run_control >= dt_run_control ) THEN
769	time_run_control = MOD( time_run_control, &
770	MAX( dt_run_control, dt_3d ) )
771	ENDIF
772	ENDIF
773
774	!
775	!-- Profile output (ASCII) on file
776	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
777	CALL print_1d
778	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
779	dt_3d ) )
780	ENDIF
781
782	!
783	!-- Graphic output for PROFIL
784	IF ( time_dopr >= dt_dopr ) THEN
785	IF ( dopr_n /= 0 ) CALL data_output_profiles
786	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
787	time_dopr_av = 0.0_wp ! due to averaging (see above)
788	ENDIF
789
790	!
791	!-- Graphic output for time series
792	IF ( time_dots >= dt_dots ) THEN
793	CALL data_output_tseries
794	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
795	ENDIF
796
797	!
798	!-- Output of spectra (formatted for use with PROFIL), in case of no
799	!-- time averaging, spectra has to be calculated before
800	IF ( time_dosp >= dt_dosp ) THEN
801	IF ( average_count_sp == 0 ) CALL calc_spectra
802	CALL data_output_spectra
803	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
804	ENDIF
805
806	!
807	!-- 2d-data output (cross-sections)
808	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
809	CALL data_output_2d( 'xy', 0 )
810	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
811	ENDIF
812	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
813	CALL data_output_2d( 'xz', 0 )
814	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
815	ENDIF
816	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
817	CALL data_output_2d( 'yz', 0 )
818	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
819	ENDIF
820
821	!
822	!-- 3d-data output (volume data)
823	IF ( time_do3d >= dt_do3d ) THEN
824	CALL data_output_3d( 0 )
825	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
826	ENDIF
827
828	!
829	!-- masked data output
830	!-- Parallel netcdf output is not tested so far for masked data, hence
831	!-- netcdf_data_format is switched back to non-paralell output.
832	netcdf_data_format_save = netcdf_data_format
833	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
834	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
835	DO mid = 1, masks
836	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
837	CALL data_output_mask( 0 )
838	time_domask(mid) = MOD( time_domask(mid), &
839	MAX( dt_domask(mid), dt_3d ) )
840	ENDIF
841	ENDDO
842	netcdf_data_format = netcdf_data_format_save
843
844	!
845	!-- Output of time-averaged 2d/3d/masked data
846	IF ( time_do_av >= dt_data_output_av ) THEN
847	CALL average_3d_data
848	CALL data_output_2d( 'xy', 1 )
849	CALL data_output_2d( 'xz', 1 )
850	CALL data_output_2d( 'yz', 1 )
851	CALL data_output_3d( 1 )
852	!-- Parallel netcdf output is not tested so far for masked data, hence
853	!-- netcdf_data_format is switched back to non-paralell output.
854	netcdf_data_format_save = netcdf_data_format
855	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
856	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
857	DO mid = 1, masks
858	CALL data_output_mask( 1 )
859	ENDDO
860	netcdf_data_format = netcdf_data_format_save
861	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
862	ENDIF
863
864	!
865	!-- Output of particle time series
866	IF ( particle_advection ) THEN
867	IF ( time_dopts >= dt_dopts .OR. &
868	( simulated_time >= particle_advection_start .AND. &
869	first_call_lpm ) ) THEN
870	CALL data_output_ptseries
871	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
872	ENDIF
873	ENDIF
874
875	!
876	!-- Output of dvrp-graphics (isosurface, particles, slicer)
877	#if defined( __dvrp_graphics )
878	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
879	#endif
880	IF ( time_dvrp >= dt_dvrp ) THEN
881	CALL data_output_dvrp
882	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
883	ENDIF
884	#if defined( __dvrp_graphics )
885	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
886	#endif
887
888	!
889	!-- If required, set the heat flux for the next time step at a random value
890	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
891
892	!
893	!-- Execute user-defined actions
894	CALL user_actions( 'after_timestep' )
895
896	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
897
898
899	ENDDO ! time loop
900
901	#if defined( __dvrp_graphics )
902	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
903	#endif
904
905	END SUBROUTINE time_integration

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