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source: palm/trunk/SOURCE/time_integration.f90 @ 1320

Last change on this file since 1320 was 1320, checked in by raasch, 10 years ago
ONLY-attribute added to USE-statements, kind-parameters added to all INTEGER and REAL declaration statements, kinds are defined in new module kinds, old module precision_kind is removed, revision history before 2012 removed, comment fields (!:) to be used for variable explanations added to all variable declaration statements
Property svn:keywords set to `Id`
File size: 35.5 KB

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

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