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source: palm/trunk/SOURCE/time_integration.f90 @ 1493

Last change on this file since 1493 was 1403, checked in by raasch, 11 years ago
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[1]	1	SUBROUTINE time_integration
	2
[1036]	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	!
[1310]	17	! Copyright 1997-2014 Leibniz Universitaet Hannover
[1036]	18	!--------------------------------------------------------------------------------!
	19	!
[484]	20	! Current revisions:
[1092]	21	! ------------------
[1366]	22	!
[1403]	23	!
[1366]	24	! Former revisions:
	25	! -----------------
	26	! $Id: time_integration.f90 1403 2014-05-09 14:52:24Z kanani $
	27	!
[1403]	28	! 1402 2014-05-09 14:25:13Z raasch
	29	! location messages modified
	30	!
[1385]	31	! 1384 2014-05-02 14:31:06Z raasch
	32	! location messages added
	33	!
[1381]	34	! 1380 2014-04-28 12:40:45Z heinze
	35	! CALL of nudge_ref added
	36	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
	37	!
[1366]	38	! 1365 2014-04-22 15:03:56Z boeske
[1365]	39	! Reset sums_ls_l to zero at each timestep
	40	! +sums_ls_l
	41	! Calculation of reference state (previously in subroutine calc_mean_profile)
	42
[1343]	43	! 1342 2014-03-26 17:04:47Z kanani
	44	! REAL constants defined as wp-kind
	45	!
[1321]	46	! 1320 2014-03-20 08:40:49Z raasch
[1320]	47	! ONLY-attribute added to USE-statements,
	48	! kind-parameters added to all INTEGER and REAL declaration statements,
	49	! kinds are defined in new module kinds,
	50	! old module precision_kind is removed,
	51	! revision history before 2012 removed,
	52	! comment fields (!:) to be used for variable explanations added to
	53	! all variable declaration statements
[1319]	54	! 1318 2014-03-17 13:35:16Z raasch
	55	! module interfaces removed
	56	!
[1309]	57	! 1308 2014-03-13 14:58:42Z fricke
	58	! +netcdf_data_format_save
	59	! For masked data, parallel netcdf output is not tested so far, hence
	60	! netcdf_data_format is switched back to non-paralell output.
	61	!
[1277]	62	! 1276 2014-01-15 13:40:41Z heinze
	63	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
	64	!
[1258]	65	! 1257 2013-11-08 15:18:40Z raasch
	66	! acc-update-host directive for timestep removed
	67	!
[1242]	68	! 1241 2013-10-30 11:36:58Z heinze
	69	! Generalize calc_mean_profile for wider use
	70	! Determine shf and qsws in dependence on data from LSF_DATA
	71	! Determine ug and vg in dependence on data from LSF_DATA
[1222]	72	! 1221 2013-09-10 08:59:13Z raasch
	73	! host update of arrays before timestep is called
	74	!
[1182]	75	! 1179 2013-06-14 05:57:58Z raasch
	76	! mean profiles for reference state are only calculated if required,
	77	! small bugfix for background communication
	78	!
[1172]	79	! 1171 2013-05-30 11:27:45Z raasch
	80	! split of prognostic_equations deactivated (comment lines), for the time being
	81	!
[1132]	82	! 1128 2013-04-12 06:19:32Z raasch
[1128]	83	! asynchronous transfer of ghost point data realized for acc-optimized version:
	84	! prognostic_equations are first called two times for those points required for
	85	! the left-right and north-south exchange, respectively, and then for the
	86	! remaining points,
	87	! those parts requiring global communication moved from prognostic_equations to
	88	! here
[392]	89	!
[1116]	90	! 1115 2013-03-26 18:16:16Z hoffmann
	91	! calculation of qr and nr is restricted to precipitation
	92	!
[1114]	93	! 1113 2013-03-10 02:48:14Z raasch
	94	! GPU-porting of boundary conditions,
	95	! openACC directives updated
	96	! formal parameter removed from routine boundary_conds
	97	!
[1112]	98	! 1111 2013-03-08 23:54:10Z raasch
	99	! +internal timestep counter for cpu statistics added,
	100	! openACC directives updated
	101	!
[1093]	102	! 1092 2013-02-02 11:24:22Z raasch
	103	! unused variables removed
	104	!
[1066]	105	! 1065 2012-11-22 17:42:36Z hoffmann
	106	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
	107	!
[1054]	108	! 1053 2012-11-13 17:11:03Z hoffmann
	109	! exchange of ghost points for nr, qr added
	110	!
[1037]	111	! 1036 2012-10-22 13:43:42Z raasch
	112	! code put under GPL (PALM 3.9)
	113	!
[1020]	114	! 1019 2012-09-28 06:46:45Z raasch
	115	! non-optimized version of prognostic_equations removed
	116	!
[1017]	117	! 1015 2012-09-27 09:23:24Z raasch
	118	! +call of prognostic_equations_acc
	119	!
[1002]	120	! 1001 2012-09-13 14:08:46Z raasch
	121	! all actions concerning leapfrog- and upstream-spline-scheme removed
	122	!
[850]	123	! 849 2012-03-15 10:35:09Z raasch
	124	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
	125	!
[826]	126	! 825 2012-02-19 03:03:44Z raasch
	127	! wang_collision_kernel renamed wang_kernel
	128	!
[1]	129	! Revision 1.1 1997/08/11 06:19:04 raasch
	130	! Initial revision
	131	!
	132	!
	133	! Description:
	134	! ------------
	135	! Integration in time of the model equations, statistical analysis and graphic
	136	! output
	137	!------------------------------------------------------------------------------!
	138
[1320]	139	USE advec_ws, &
	140	ONLY: ws_statistics
	141
	142	USE arrays_3d, &
[1380]	143	ONLY: diss, dzu, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, ql, &
	144	ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, u, &
	145	u_p, v, vpt, v_p, w_p
[1320]	146
[1365]	147	USE calc_mean_profile_mod, &
[1320]	148	ONLY: calc_mean_profile
	149
	150	USE control_parameters, &
	151	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
	152	average_count_sp, averaging_interval, averaging_interval_pr, &
[1380]	153	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
	154	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
	155	cloud_physics, constant_heatflux, create_disturbances, dopr_n, &
[1320]	156	constant_diffusion, coupling_mode, coupling_start_time, &
	157	current_timestep_number, disturbance_created, &
	158	disturbance_energy_limit, dist_range, do_sum, dt_3d, &
	159	dt_averaging_input, dt_averaging_input_pr, dt_coupling, &
	160	dt_data_output_av, dt_disturb, dt_do2d_xy, dt_do2d_xz, &
	161	dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
	162	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
	163	end_time, first_call_lpm, galilei_transformation, humidity, &
	164	icloud_scheme, intermediate_timestep_count, &
	165	intermediate_timestep_count_max, large_scale_forcing, &
	166	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
[1365]	167	netcdf_data_format, neutral, nr_timesteps_this_run, nudging, &
	168	ocean, on_device, passive_scalar, prandtl_layer, precipitation, &
[1320]	169	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
	170	run_coupled, simulated_time, simulated_time_chr, &
	171	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
	172	skip_time_do3d, skip_time_domask, skip_time_dopr, &
	173	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
	174	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
	175	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
	176	time_do3d, time_domask, time_dopr, time_dopr_av, &
	177	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
	178	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
	179	time_run_control, time_since_reference_point, turbulence, &
	180	turbulent_inflow, use_initial_profile_as_reference, &
	181	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
	182	ws_scheme_sca
	183
	184	USE cpulog, &
	185	ONLY: cpu_log, log_point, log_point_s
	186
	187	USE indices, &
	188	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
[1380]	189	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
[1320]	190
	191	USE interaction_droplets_ptq_mod, &
	192	ONLY: interaction_droplets_ptq
	193
	194	USE kinds
	195
	196	USE ls_forcing_mod, &
	197	ONLY: ls_forcing_surf, ls_forcing_vert
	198
[1365]	199	USE nudge_mod, &
[1380]	200	ONLY: calc_tnudge, nudge_ref
[1365]	201
[1320]	202	USE particle_attributes, &
	203	ONLY: particle_advection, particle_advection_start, wang_kernel
	204
[1]	205	USE pegrid
	206
[1320]	207	USE production_e_mod, &
	208	ONLY: production_e_init
	209
[1402]	210	USE progress_bar, &
	211	ONLY: finish_progress_bar, output_progress_bar
	212
[1320]	213	USE prognostic_equations_mod, &
	214	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
	215	prognostic_equations_vector
	216
	217	USE statistics, &
[1365]	218	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
[1320]	219
	220	USE user_actions_mod, &
	221	ONLY: user_actions
	222
[1]	223	IMPLICIT NONE
	224
[1320]	225	CHARACTER (LEN=9) :: time_to_string !:
[1]	226
[1320]	227	INTEGER(iwp) :: netcdf_data_format_save !:
	228
[1]	229	!
	230	!-- At the beginning of a simulation determine the time step as well as
	231	!-- determine and print out the run control parameters
[1342]	232	IF ( simulated_time == 0.0_wp ) CALL timestep
[667]	233
[1]	234	CALL run_control
	235
[667]	236
[108]	237	!
	238	!-- Data exchange between coupled models in case that a call has been omitted
	239	!-- at the end of the previous run of a job chain.
[291]	240	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[108]	241	!
	242	!-- In case of model termination initiated by the local model the coupler
	243	!-- must not be called because this would again cause an MPI hang.
	244	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
	245	CALL surface_coupler
	246	time_coupling = time_coupling - dt_coupling
	247	ENDDO
[1342]	248	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
[348]	249	THEN
	250	time_coupling = time_since_reference_point
	251	ENDIF
[108]	252	ENDIF
	253
	254
[1]	255	#if defined( __dvrp_graphics )
	256	!
	257	!-- Time measurement with dvrp software
	258	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	259	#endif
	260
[1402]	261	CALL location_message( 'start with time-stepping', .TRUE. )
[1]	262	!
	263	!-- Start of the time loop
	264	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
	265	.NOT. terminate_run )
	266
	267	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
[1221]	268
[1]	269	!
	270	!-- Determine size of next time step
[1342]	271	IF ( simulated_time /= 0.0_wp ) THEN
[1221]	272	CALL timestep
	273	ENDIF
	274
[1]	275	!
[1241]	276	!-- Determine ug, vg and w_subs in dependence on data from external file
	277	!-- LSF_DATA
[1365]	278	IF ( large_scale_forcing .AND. lsf_vert ) THEN
[1241]	279	CALL ls_forcing_vert ( simulated_time )
[1365]	280	sums_ls_l = 0.0_wp
[1241]	281	ENDIF
	282
	283	!
[1380]	284	!-- Set pt_init and q_init to the current profiles taken from
	285	!-- NUDGING_DATA
	286	IF ( nudging ) THEN
	287	CALL nudge_ref ( simulated_time )
	288	!
	289	!-- Store temperature gradient at the top boundary for possible Neumann
	290	!-- boundary condition
	291	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
	292	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
	293	ENDIF
	294
	295	!
[1]	296	!-- Execute the user-defined actions
	297	CALL user_actions( 'before_timestep' )
	298
	299	!
	300	!-- Start of intermediate step loop
	301	intermediate_timestep_count = 0
	302	DO WHILE ( intermediate_timestep_count < &
	303	intermediate_timestep_count_max )
	304
	305	intermediate_timestep_count = intermediate_timestep_count + 1
	306
	307	!
	308	!-- Set the steering factors for the prognostic equations which depend
	309	!-- on the timestep scheme
	310	CALL timestep_scheme_steering
	311
	312	!
[1128]	313	!-- Calculate those variables needed in the tendency terms which need
	314	!-- global communication
[1179]	315	IF ( .NOT. use_single_reference_value .AND. &
	316	.NOT. use_initial_profile_as_reference ) THEN
	317	!
	318	!-- Horizontally averaged profiles to be used as reference state in
	319	!-- buoyancy terms (WARNING: only the respective last call of
	320	!-- calc_mean_profile defines the reference state!)
[1365]	321	IF ( .NOT. neutral ) THEN
	322	CALL calc_mean_profile( pt, 4 )
	323	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
	324	ENDIF
	325	IF ( ocean ) THEN
	326	CALL calc_mean_profile( rho, 64 )
	327	ref_state(:) = hom(:,1,64,0)
	328	ENDIF
	329	IF ( humidity ) THEN
	330	CALL calc_mean_profile( vpt, 44 )
	331	ref_state(:) = hom(:,1,44,0)
	332	ENDIF
	333
[1179]	334	ENDIF
	335
[1128]	336	IF ( .NOT. constant_diffusion ) CALL production_e_init
	337	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
	338	intermediate_timestep_count == 1 ) CALL ws_statistics
[1365]	339	!
	340	!-- In case of nudging calculate current nudging time scale and horizontal
[1380]	341	!-- means of u, v, pt and q
[1365]	342	IF ( nudging ) THEN
	343	CALL calc_tnudge( simulated_time )
	344	CALL calc_mean_profile( u, 1 )
	345	CALL calc_mean_profile( v, 2 )
	346	CALL calc_mean_profile( pt, 4 )
	347	CALL calc_mean_profile( q, 41 )
	348	ENDIF
[1128]	349
	350	!
[1]	351	!-- Solve the prognostic equations. A fast cache optimized version with
	352	!-- only one single loop is used in case of Piascek-Williams advection
	353	!-- scheme. NEC vector machines use a different version, because
	354	!-- in the other versions a good vectorization is prohibited due to
	355	!-- inlining problems.
[1019]	356	IF ( loop_optimization == 'cache' ) THEN
	357	CALL prognostic_equations_cache
	358	ELSEIF ( loop_optimization == 'vector' ) THEN
[63]	359	CALL prognostic_equations_vector
[1015]	360	ELSEIF ( loop_optimization == 'acc' ) THEN
[1171]	361	i_left = nxl; i_right = nxr
	362	j_south = nys; j_north = nyn
	363	CALL prognostic_equations_acc
	364
	365	! i_left = nxl; i_right = nxl+nbgp-1
[1128]	366	! j_south = nys; j_north = nyn
	367	! CALL prognostic_equations_acc
[1171]	368	! i_left = nxr-nbgp+1; i_right = nxr
	369	! j_south = nys; j_north = nyn
	370	! CALL prognostic_equations_acc
[1128]	371
	372	!
	373	!-- Exchange of ghost points (lateral boundary conditions)
	374	IF ( background_communication ) THEN
	375
	376	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
	377
	378	send_receive = 'lr'
	379	sendrecv_in_background = .TRUE.
	380	req = 0
	381	req_count = 0
	382
	383	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	384	on_device = .TRUE. ! to be removed after complete porting
	385	ELSE ! of ghost point exchange
	386	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	387	ENDIF
	388
	389	CALL exchange_horiz( u_p, nbgp )
	390	CALL exchange_horiz( v_p, nbgp )
	391	CALL exchange_horiz( w_p, nbgp )
	392	CALL exchange_horiz( pt_p, nbgp )
	393	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	394	IF ( ocean ) THEN
	395	CALL exchange_horiz( sa_p, nbgp )
	396	CALL exchange_horiz( rho, nbgp )
	397	CALL exchange_horiz( prho, nbgp )
	398	ENDIF
	399	IF (humidity .OR. passive_scalar) THEN
	400	CALL exchange_horiz( q_p, nbgp )
	401	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	402	CALL exchange_horiz( qr_p, nbgp )
	403	CALL exchange_horiz( nr_p, nbgp )
	404	ENDIF
	405	ENDIF
	406	IF ( cloud_droplets ) THEN
	407	CALL exchange_horiz( ql, nbgp )
	408	CALL exchange_horiz( ql_c, nbgp )
	409	CALL exchange_horiz( ql_v, nbgp )
	410	CALL exchange_horiz( ql_vp, nbgp )
	411	ENDIF
	412	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	413
	414	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	415	on_device = .FALSE. ! to be removed after complete porting
	416	ELSE ! of ghost point exchange
	417	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	418	ENDIF
	419
	420	sendrecv_in_background = .FALSE.
	421
	422	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
	423
	424	ENDIF
	425
[1171]	426	! i_left = nxl+nbgp; i_right = nxr-nbgp
	427	! j_south = nys; j_north = nys+nbgp-1
	428	! CALL prognostic_equations_acc
	429	! i_left = nxl+nbgp; i_right = nxr-nbgp
	430	! j_south = nyn-nbgp+1; j_north = nyn
	431	! CALL prognostic_equations_acc
[1128]	432
	433	IF ( background_communication ) THEN
	434	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
	435	#if defined( __parallel )
	436	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	437	#endif
	438	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
	439
	440	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
	441
	442	send_receive = 'ns'
	443	sendrecv_in_background = .TRUE.
	444	req = 0
	445	req_count = 0
	446
	447	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	448	on_device = .TRUE. ! to be removed after complete porting
	449	ELSE ! of ghost point exchange
	450	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	451	ENDIF
	452
	453	CALL exchange_horiz( u_p, nbgp )
	454	CALL exchange_horiz( v_p, nbgp )
	455	CALL exchange_horiz( w_p, nbgp )
	456	CALL exchange_horiz( pt_p, nbgp )
	457	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	458	IF ( ocean ) THEN
	459	CALL exchange_horiz( sa_p, nbgp )
	460	CALL exchange_horiz( rho, nbgp )
	461	CALL exchange_horiz( prho, nbgp )
	462	ENDIF
	463	IF (humidity .OR. passive_scalar) THEN
	464	CALL exchange_horiz( q_p, nbgp )
	465	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	466	CALL exchange_horiz( qr_p, nbgp )
	467	CALL exchange_horiz( nr_p, nbgp )
	468	ENDIF
	469	ENDIF
	470	IF ( cloud_droplets ) THEN
	471	CALL exchange_horiz( ql, nbgp )
	472	CALL exchange_horiz( ql_c, nbgp )
	473	CALL exchange_horiz( ql_v, nbgp )
	474	CALL exchange_horiz( ql_vp, nbgp )
	475	ENDIF
	476	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	477
	478	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	479	on_device = .FALSE. ! to be removed after complete porting
	480	ELSE ! of ghost point exchange
	481	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	482	ENDIF
	483
	484	sendrecv_in_background = .FALSE.
	485
	486	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	487
	488	ENDIF
	489
[1171]	490	! i_left = nxl+nbgp; i_right = nxr-nbgp
	491	! j_south = nys+nbgp; j_north = nyn-nbgp
	492	! CALL prognostic_equations_acc
[1128]	493
	494	IF ( background_communication ) THEN
	495	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
	496	#if defined( __parallel )
	497	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	498	#endif
	499	send_receive = 'al'
	500	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
	501	ENDIF
	502
[1]	503	ENDIF
	504
	505	!
[849]	506	!-- Particle transport/physics with the Lagrangian particle model
	507	!-- (only once during intermediate steps, because it uses an Euler-step)
[1128]	508	!-- ### particle model should be moved before prognostic_equations, in order
	509	!-- to regard droplet interactions directly
[63]	510	IF ( particle_advection .AND. &
	511	simulated_time >= particle_advection_start .AND. &
[1]	512	intermediate_timestep_count == 1 ) THEN
[849]	513	CALL lpm
	514	first_call_lpm = .FALSE.
[1]	515	ENDIF
	516
	517	!
	518	!-- Interaction of droplets with temperature and specific humidity.
	519	!-- Droplet condensation and evaporation is calculated within
	520	!-- advec_particles.
	521	IF ( cloud_droplets .AND. &
	522	intermediate_timestep_count == intermediate_timestep_count_max )&
	523	THEN
	524	CALL interaction_droplets_ptq
	525	ENDIF
	526
	527	!
	528	!-- Exchange of ghost points (lateral boundary conditions)
[1128]	529	IF ( .NOT. background_communication ) THEN
[1113]	530
[1128]	531	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
[1113]	532
[1128]	533	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	534	on_device = .TRUE. ! to be removed after complete porting
	535	ELSE ! of ghost point exchange
	536	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
[1053]	537	ENDIF
[1]	538
[1128]	539	CALL exchange_horiz( u_p, nbgp )
	540	CALL exchange_horiz( v_p, nbgp )
	541	CALL exchange_horiz( w_p, nbgp )
	542	CALL exchange_horiz( pt_p, nbgp )
	543	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	544	IF ( ocean ) THEN
	545	CALL exchange_horiz( sa_p, nbgp )
	546	CALL exchange_horiz( rho, nbgp )
	547	CALL exchange_horiz( prho, nbgp )
	548	ENDIF
	549	IF (humidity .OR. passive_scalar) THEN
	550	CALL exchange_horiz( q_p, nbgp )
[1179]	551	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	552	precipitation ) THEN
[1128]	553	CALL exchange_horiz( qr_p, nbgp )
	554	CALL exchange_horiz( nr_p, nbgp )
	555	ENDIF
	556	ENDIF
	557	IF ( cloud_droplets ) THEN
	558	CALL exchange_horiz( ql, nbgp )
	559	CALL exchange_horiz( ql_c, nbgp )
	560	CALL exchange_horiz( ql_v, nbgp )
	561	CALL exchange_horiz( ql_vp, nbgp )
	562	ENDIF
	563	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	564
	565	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	566	on_device = .FALSE. ! to be removed after complete porting
	567	ELSE ! of ghost point exchange
	568	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	569	ENDIF
	570
	571	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	572
[1113]	573	ENDIF
	574
[1]	575	!
	576	!-- Boundary conditions for the prognostic quantities (except of the
	577	!-- velocities at the outflow in case of a non-cyclic lateral wall)
[1113]	578	CALL boundary_conds
[1]	579
	580	!
[73]	581	!-- Swap the time levels in preparation for the next time step.
	582	CALL swap_timelevel
	583
	584	!
[1]	585	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
	586	!-- when a sloping surface is used
	587	IF ( sloping_surface ) THEN
[707]	588	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
	589	pt_slope_offset
	590	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
	591	pt_slope_offset
[1]	592	ENDIF
	593
	594	!
[151]	595	!-- Impose a turbulent inflow using the recycling method
	596	IF ( turbulent_inflow ) CALL inflow_turbulence
	597
	598	!
[1]	599	!-- Impose a random perturbation on the horizontal velocity field
[106]	600	IF ( create_disturbances .AND. &
	601	( call_psolver_at_all_substeps .AND. &
[1]	602	intermediate_timestep_count == intermediate_timestep_count_max )&
[106]	603	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
	604	intermediate_timestep_count == 1 ) ) &
[1]	605	THEN
	606	time_disturb = time_disturb + dt_3d
	607	IF ( time_disturb >= dt_disturb ) THEN
[1111]	608	!$acc update host( u, v )
[1113]	609	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
[87]	610	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
[75]	611	CALL disturb_field( nzb_u_inner, tend, u )
	612	CALL disturb_field( nzb_v_inner, tend, v )
[707]	613	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
[1]	614	!
	615	!-- Runs with a non-cyclic lateral wall need perturbations
	616	!-- near the inflow throughout the whole simulation
	617	dist_range = 1
[75]	618	CALL disturb_field( nzb_u_inner, tend, u )
	619	CALL disturb_field( nzb_v_inner, tend, v )
[1]	620	dist_range = 0
	621	ENDIF
[1113]	622	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
[1111]	623	!$acc update device( u, v )
[1]	624	time_disturb = time_disturb - dt_disturb
	625	ENDIF
	626	ENDIF
	627
	628	!
	629	!-- Reduce the velocity divergence via the equation for perturbation
	630	!-- pressure.
[106]	631	IF ( intermediate_timestep_count == 1 .OR. &
	632	call_psolver_at_all_substeps ) THEN
[1]	633	CALL pres
	634	ENDIF
	635
	636	!
	637	!-- If required, compute liquid water content
[1015]	638	IF ( cloud_physics ) THEN
	639	CALL calc_liquid_water_content
	640	!$acc update device( ql )
	641	ENDIF
[1115]	642	!
	643	!-- If required, compute virtual potential temperature
	644	IF ( humidity ) THEN
	645	CALL compute_vpt
	646	!$acc update device( vpt )
	647	ENDIF
[1]	648	!
	649	!-- Compute the diffusion quantities
	650	IF ( .NOT. constant_diffusion ) THEN
	651
	652	!
[1276]	653	!-- Determine surface fluxes shf and qsws and surface values
	654	!-- pt_surface and q_surface in dependence on data from external
	655	!-- file LSF_DATA respectively
	656	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
	657	intermediate_timestep_count == intermediate_timestep_count_max )&
	658	THEN
	659	CALL ls_forcing_surf ( simulated_time )
	660	ENDIF
	661
	662	!
[1]	663	!-- First the vertical fluxes in the Prandtl layer are being computed
	664	IF ( prandtl_layer ) THEN
	665	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
	666	CALL prandtl_fluxes
	667	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
	668	ENDIF
[1241]	669
[1]	670	!
	671	!-- Compute the diffusion coefficients
	672	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
[75]	673	IF ( .NOT. humidity ) THEN
[97]	674	IF ( ocean ) THEN
[388]	675	CALL diffusivities( prho, prho_reference )
[97]	676	ELSE
	677	CALL diffusivities( pt, pt_reference )
	678	ENDIF
[1]	679	ELSE
[97]	680	CALL diffusivities( vpt, pt_reference )
[1]	681	ENDIF
	682	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
	683
	684	ENDIF
	685
	686	ENDDO ! Intermediate step loop
	687
	688	!
	689	!-- Increase simulation time and output times
[1111]	690	nr_timesteps_this_run = nr_timesteps_this_run + 1
[291]	691	current_timestep_number = current_timestep_number + 1
	692	simulated_time = simulated_time + dt_3d
	693	simulated_time_chr = time_to_string( simulated_time )
	694	time_since_reference_point = simulated_time - coupling_start_time
	695
[1]	696	IF ( simulated_time >= skip_time_data_output_av ) THEN
	697	time_do_av = time_do_av + dt_3d
	698	ENDIF
	699	IF ( simulated_time >= skip_time_do2d_xy ) THEN
	700	time_do2d_xy = time_do2d_xy + dt_3d
	701	ENDIF
	702	IF ( simulated_time >= skip_time_do2d_xz ) THEN
	703	time_do2d_xz = time_do2d_xz + dt_3d
	704	ENDIF
	705	IF ( simulated_time >= skip_time_do2d_yz ) THEN
	706	time_do2d_yz = time_do2d_yz + dt_3d
	707	ENDIF
	708	IF ( simulated_time >= skip_time_do3d ) THEN
	709	time_do3d = time_do3d + dt_3d
	710	ENDIF
[410]	711	DO mid = 1, masks
	712	IF ( simulated_time >= skip_time_domask(mid) ) THEN
	713	time_domask(mid)= time_domask(mid) + dt_3d
	714	ENDIF
	715	ENDDO
[1]	716	time_dvrp = time_dvrp + dt_3d
	717	IF ( simulated_time >= skip_time_dosp ) THEN
	718	time_dosp = time_dosp + dt_3d
	719	ENDIF
	720	time_dots = time_dots + dt_3d
[849]	721	IF ( .NOT. first_call_lpm ) THEN
[1]	722	time_dopts = time_dopts + dt_3d
	723	ENDIF
	724	IF ( simulated_time >= skip_time_dopr ) THEN
	725	time_dopr = time_dopr + dt_3d
	726	ENDIF
	727	time_dopr_listing = time_dopr_listing + dt_3d
	728	time_run_control = time_run_control + dt_3d
	729
	730	!
[102]	731	!-- Data exchange between coupled models
[291]	732	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[102]	733	time_coupling = time_coupling + dt_3d
[343]	734
[108]	735	!
	736	!-- In case of model termination initiated by the local model
	737	!-- (terminate_coupled > 0), the coupler must be skipped because it would
	738	!-- cause an MPI intercomminucation hang.
	739	!-- If necessary, the coupler will be called at the beginning of the
	740	!-- next restart run.
	741	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
[102]	742	CALL surface_coupler
	743	time_coupling = time_coupling - dt_coupling
	744	ENDDO
	745	ENDIF
	746
	747	!
[46]	748	!-- Execute user-defined actions
	749	CALL user_actions( 'after_integration' )
	750
	751	!
[1]	752	!-- If Galilei transformation is used, determine the distance that the
	753	!-- model has moved so far
	754	IF ( galilei_transformation ) THEN
	755	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
	756	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
	757	ENDIF
	758
	759	!
	760	!-- Check, if restart is necessary (because cpu-time is expiring or
	761	!-- because it is forced by user) and set stop flag
[108]	762	!-- This call is skipped if the remote model has already initiated a restart.
	763	IF ( .NOT. terminate_run ) CALL check_for_restart
[1]	764
	765	!
	766	!-- Carry out statistical analysis and output at the requested output times.
	767	!-- The MOD function is used for calculating the output time counters (like
	768	!-- time_dopr) in order to regard a possible decrease of the output time
	769	!-- interval in case of restart runs
	770
	771	!
	772	!-- Set a flag indicating that so far no statistics have been created
	773	!-- for this time step
	774	flow_statistics_called = .FALSE.
	775
	776	!
	777	!-- If required, call flow_statistics for averaging in time
[1342]	778	IF ( averaging_interval_pr /= 0.0_wp .AND. &
[1]	779	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
	780	simulated_time >= skip_time_dopr ) THEN
	781	time_dopr_av = time_dopr_av + dt_3d
	782	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
	783	do_sum = .TRUE.
	784	time_dopr_av = MOD( time_dopr_av, &
	785	MAX( dt_averaging_input_pr, dt_3d ) )
	786	ENDIF
	787	ENDIF
	788	IF ( do_sum ) CALL flow_statistics
	789
	790	!
[410]	791	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
[1342]	792	IF ( averaging_interval /= 0.0_wp .AND. &
[1]	793	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
	794	simulated_time >= skip_time_data_output_av ) &
	795	THEN
	796	time_do_sla = time_do_sla + dt_3d
	797	IF ( time_do_sla >= dt_averaging_input ) THEN
	798	CALL sum_up_3d_data
	799	average_count_3d = average_count_3d + 1
	800	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
	801	ENDIF
	802	ENDIF
	803
	804	!
	805	!-- Calculate spectra for time averaging
[1342]	806	IF ( averaging_interval_sp /= 0.0_wp .AND. &
[1]	807	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
	808	simulated_time >= skip_time_dosp ) THEN
	809	time_dosp_av = time_dosp_av + dt_3d
	810	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
	811	CALL calc_spectra
	812	time_dosp_av = MOD( time_dosp_av, &
	813	MAX( dt_averaging_input_pr, dt_3d ) )
	814	ENDIF
	815	ENDIF
	816
	817	!
	818	!-- Computation and output of run control parameters.
[1001]	819	!-- This is also done whenever perturbations have been imposed
[1]	820	IF ( time_run_control >= dt_run_control .OR. &
[1001]	821	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
[1]	822	THEN
	823	CALL run_control
	824	IF ( time_run_control >= dt_run_control ) THEN
	825	time_run_control = MOD( time_run_control, &
	826	MAX( dt_run_control, dt_3d ) )
	827	ENDIF
	828	ENDIF
	829
	830	!
	831	!-- Profile output (ASCII) on file
	832	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
	833	CALL print_1d
	834	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
	835	dt_3d ) )
	836	ENDIF
	837
	838	!
	839	!-- Graphic output for PROFIL
	840	IF ( time_dopr >= dt_dopr ) THEN
	841	IF ( dopr_n /= 0 ) CALL data_output_profiles
	842	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
[1342]	843	time_dopr_av = 0.0_wp ! due to averaging (see above)
[1]	844	ENDIF
	845
	846	!
	847	!-- Graphic output for time series
	848	IF ( time_dots >= dt_dots ) THEN
[48]	849	CALL data_output_tseries
[1]	850	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
	851	ENDIF
	852
	853	!
	854	!-- Output of spectra (formatted for use with PROFIL), in case of no
	855	!-- time averaging, spectra has to be calculated before
	856	IF ( time_dosp >= dt_dosp ) THEN
	857	IF ( average_count_sp == 0 ) CALL calc_spectra
	858	CALL data_output_spectra
	859	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
	860	ENDIF
	861
	862	!
	863	!-- 2d-data output (cross-sections)
	864	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
	865	CALL data_output_2d( 'xy', 0 )
	866	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
	867	ENDIF
	868	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
	869	CALL data_output_2d( 'xz', 0 )
	870	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
	871	ENDIF
	872	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
	873	CALL data_output_2d( 'yz', 0 )
	874	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
	875	ENDIF
	876
	877	!
	878	!-- 3d-data output (volume data)
	879	IF ( time_do3d >= dt_do3d ) THEN
	880	CALL data_output_3d( 0 )
	881	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
	882	ENDIF
	883
	884	!
[410]	885	!-- masked data output
[1308]	886	!-- Parallel netcdf output is not tested so far for masked data, hence
	887	!-- netcdf_data_format is switched back to non-paralell output.
	888	netcdf_data_format_save = netcdf_data_format
	889	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	890	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	891	DO mid = 1, masks
	892	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
	893	CALL data_output_mask( 0 )
	894	time_domask(mid) = MOD( time_domask(mid), &
	895	MAX( dt_domask(mid), dt_3d ) )
	896	ENDIF
	897	ENDDO
[1308]	898	netcdf_data_format = netcdf_data_format_save
[410]	899
	900	!
	901	!-- Output of time-averaged 2d/3d/masked data
[1]	902	IF ( time_do_av >= dt_data_output_av ) THEN
	903	CALL average_3d_data
	904	CALL data_output_2d( 'xy', 1 )
	905	CALL data_output_2d( 'xz', 1 )
	906	CALL data_output_2d( 'yz', 1 )
	907	CALL data_output_3d( 1 )
[1308]	908	!-- Parallel netcdf output is not tested so far for masked data, hence
	909	!-- netcdf_data_format is switched back to non-paralell output.
	910	netcdf_data_format_save = netcdf_data_format
	911	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	912	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	913	DO mid = 1, masks
	914	CALL data_output_mask( 1 )
	915	ENDDO
[1308]	916	netcdf_data_format = netcdf_data_format_save
[1]	917	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
	918	ENDIF
	919
	920	!
	921	!-- Output of particle time series
[253]	922	IF ( particle_advection ) THEN
	923	IF ( time_dopts >= dt_dopts .OR. &
	924	( simulated_time >= particle_advection_start .AND. &
[849]	925	first_call_lpm ) ) THEN
[253]	926	CALL data_output_ptseries
	927	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
	928	ENDIF
[1]	929	ENDIF
	930
	931	!
	932	!-- Output of dvrp-graphics (isosurface, particles, slicer)
	933	#if defined( __dvrp_graphics )
	934	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
	935	#endif
	936	IF ( time_dvrp >= dt_dvrp ) THEN
	937	CALL data_output_dvrp
	938	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
	939	ENDIF
	940	#if defined( __dvrp_graphics )
	941	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	942	#endif
	943
	944	!
	945	!-- If required, set the heat flux for the next time step at a random value
	946	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
	947
	948	!
	949	!-- Execute user-defined actions
	950	CALL user_actions( 'after_timestep' )
	951
[1402]	952	!
	953	!-- Output elapsed simulated time in form of a progress bar on stdout
	954	IF ( myid == 0 ) CALL output_progress_bar
	955
[1]	956	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
	957
[667]	958
[1]	959	ENDDO ! time loop
	960
[1402]	961	IF ( myid == 0 ) CALL finish_progress_bar
	962
[1]	963	#if defined( __dvrp_graphics )
	964	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
	965	#endif
	966
[1402]	967	CALL location_message( 'finished time-stepping', .TRUE. )
[1384]	968
[1]	969	END SUBROUTINE time_integration

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