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source: palm/trunk/SOURCE/time_integration.f90 @ 1712

Last change on this file since 1712 was 1692, checked in by maronga, 9 years ago
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[1682]	1	!> @file time_integration.f90
[1036]	2	!--------------------------------------------------------------------------------!
	3	! This file is part of PALM.
	4	!
	5	! PALM is free software: you can redistribute it and/or modify it under the terms
	6	! of the GNU General Public License as published by the Free Software Foundation,
	7	! either version 3 of the License, or (at your option) any later version.
	8	!
	9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	12	!
	13	! You should have received a copy of the GNU General Public License along with
	14	! PALM. If not, see <http://www.gnu.org/licenses/>.
	15	!
[1691]	16	! Copyright 1997-2015 Leibniz Universitaet Hannover
[1036]	17	!--------------------------------------------------------------------------------!
	18	!
[484]	19	! Current revisions:
[1092]	20	! ------------------
[1366]	21	!
[1692]	22	!
[1366]	23	! Former revisions:
	24	! -----------------
	25	! $Id: time_integration.f90 1692 2015-10-26 16:29:17Z raasch $
	26	!
[1692]	27	! 1691 2015-10-26 16:17:44Z maronga
	28	! Added option for spin-ups without land surface and radiation models. Moved calls
	29	! for radiation and lan surface schemes.
	30	!
[1683]	31	! 1682 2015-10-07 23:56:08Z knoop
	32	! Code annotations made doxygen readable
	33	!
[1672]	34	! 1671 2015-09-25 03:29:37Z raasch
	35	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
	36	! for particles
	37	!
[1586]	38	! 1585 2015-04-30 07:05:52Z maronga
	39	! Moved call of radiation scheme. Added support for RRTM
	40	!
[1552]	41	! 1551 2015-03-03 14:18:16Z maronga
	42	! Added interface for different radiation schemes.
	43	!
[1497]	44	! 1496 2014-12-02 17:25:50Z maronga
	45	! Added calls for the land surface model and radiation scheme
	46	!
[1403]	47	! 1402 2014-05-09 14:25:13Z raasch
	48	! location messages modified
	49	!
[1385]	50	! 1384 2014-05-02 14:31:06Z raasch
	51	! location messages added
	52	!
[1381]	53	! 1380 2014-04-28 12:40:45Z heinze
	54	! CALL of nudge_ref added
	55	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
	56	!
[1366]	57	! 1365 2014-04-22 15:03:56Z boeske
[1365]	58	! Reset sums_ls_l to zero at each timestep
	59	! +sums_ls_l
	60	! Calculation of reference state (previously in subroutine calc_mean_profile)
	61
[1343]	62	! 1342 2014-03-26 17:04:47Z kanani
	63	! REAL constants defined as wp-kind
	64	!
[1321]	65	! 1320 2014-03-20 08:40:49Z raasch
[1320]	66	! ONLY-attribute added to USE-statements,
	67	! kind-parameters added to all INTEGER and REAL declaration statements,
	68	! kinds are defined in new module kinds,
	69	! old module precision_kind is removed,
	70	! revision history before 2012 removed,
	71	! comment fields (!:) to be used for variable explanations added to
	72	! all variable declaration statements
[1319]	73	! 1318 2014-03-17 13:35:16Z raasch
	74	! module interfaces removed
	75	!
[1309]	76	! 1308 2014-03-13 14:58:42Z fricke
	77	! +netcdf_data_format_save
	78	! For masked data, parallel netcdf output is not tested so far, hence
	79	! netcdf_data_format is switched back to non-paralell output.
	80	!
[1277]	81	! 1276 2014-01-15 13:40:41Z heinze
	82	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
	83	!
[1258]	84	! 1257 2013-11-08 15:18:40Z raasch
	85	! acc-update-host directive for timestep removed
	86	!
[1242]	87	! 1241 2013-10-30 11:36:58Z heinze
	88	! Generalize calc_mean_profile for wider use
	89	! Determine shf and qsws in dependence on data from LSF_DATA
	90	! Determine ug and vg in dependence on data from LSF_DATA
[1222]	91	! 1221 2013-09-10 08:59:13Z raasch
	92	! host update of arrays before timestep is called
	93	!
[1182]	94	! 1179 2013-06-14 05:57:58Z raasch
	95	! mean profiles for reference state are only calculated if required,
	96	! small bugfix for background communication
	97	!
[1172]	98	! 1171 2013-05-30 11:27:45Z raasch
	99	! split of prognostic_equations deactivated (comment lines), for the time being
	100	!
[1132]	101	! 1128 2013-04-12 06:19:32Z raasch
[1128]	102	! asynchronous transfer of ghost point data realized for acc-optimized version:
	103	! prognostic_equations are first called two times for those points required for
	104	! the left-right and north-south exchange, respectively, and then for the
	105	! remaining points,
	106	! those parts requiring global communication moved from prognostic_equations to
	107	! here
[392]	108	!
[1116]	109	! 1115 2013-03-26 18:16:16Z hoffmann
	110	! calculation of qr and nr is restricted to precipitation
	111	!
[1114]	112	! 1113 2013-03-10 02:48:14Z raasch
	113	! GPU-porting of boundary conditions,
	114	! openACC directives updated
	115	! formal parameter removed from routine boundary_conds
	116	!
[1112]	117	! 1111 2013-03-08 23:54:10Z raasch
	118	! +internal timestep counter for cpu statistics added,
	119	! openACC directives updated
	120	!
[1093]	121	! 1092 2013-02-02 11:24:22Z raasch
	122	! unused variables removed
	123	!
[1066]	124	! 1065 2012-11-22 17:42:36Z hoffmann
	125	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
	126	!
[1054]	127	! 1053 2012-11-13 17:11:03Z hoffmann
	128	! exchange of ghost points for nr, qr added
	129	!
[1037]	130	! 1036 2012-10-22 13:43:42Z raasch
	131	! code put under GPL (PALM 3.9)
	132	!
[1020]	133	! 1019 2012-09-28 06:46:45Z raasch
	134	! non-optimized version of prognostic_equations removed
	135	!
[1017]	136	! 1015 2012-09-27 09:23:24Z raasch
	137	! +call of prognostic_equations_acc
	138	!
[1002]	139	! 1001 2012-09-13 14:08:46Z raasch
	140	! all actions concerning leapfrog- and upstream-spline-scheme removed
	141	!
[850]	142	! 849 2012-03-15 10:35:09Z raasch
	143	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
	144	!
[826]	145	! 825 2012-02-19 03:03:44Z raasch
	146	! wang_collision_kernel renamed wang_kernel
	147	!
[1]	148	! Revision 1.1 1997/08/11 06:19:04 raasch
	149	! Initial revision
	150	!
	151	!
	152	! Description:
	153	! ------------
[1682]	154	!> Integration in time of the model equations, statistical analysis and graphic
	155	!> output
[1]	156	!------------------------------------------------------------------------------!
[1682]	157	SUBROUTINE time_integration
	158
[1]	159
[1320]	160	USE advec_ws, &
	161	ONLY: ws_statistics
	162
	163	USE arrays_3d, &
[1380]	164	ONLY: diss, dzu, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, ql, &
	165	ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, u, &
	166	u_p, v, vpt, v_p, w_p
[1320]	167
[1365]	168	USE calc_mean_profile_mod, &
[1320]	169	ONLY: calc_mean_profile
	170
	171	USE control_parameters, &
	172	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
	173	average_count_sp, averaging_interval, averaging_interval_pr, &
[1380]	174	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
	175	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
[1691]	176	cloud_physics, constant_flux_layer, constant_heatflux, &
	177	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
	178	coupling_start_time, current_timestep_number, &
	179	disturbance_created, disturbance_energy_limit, dist_range, &
	180	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
	181	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
	182	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
[1320]	183	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
	184	end_time, first_call_lpm, galilei_transformation, humidity, &
	185	icloud_scheme, intermediate_timestep_count, &
	186	intermediate_timestep_count_max, large_scale_forcing, &
	187	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
[1365]	188	netcdf_data_format, neutral, nr_timesteps_this_run, nudging, &
[1691]	189	ocean, on_device, passive_scalar, precipitation, &
[1320]	190	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
	191	run_coupled, simulated_time, simulated_time_chr, &
	192	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
	193	skip_time_do3d, skip_time_domask, skip_time_dopr, &
	194	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
	195	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
	196	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
	197	time_do3d, time_domask, time_dopr, time_dopr_av, &
	198	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
	199	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
[1496]	200	time_run_control, time_since_reference_point, &
	201	turbulence, &
[1320]	202	turbulent_inflow, use_initial_profile_as_reference, &
	203	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
	204	ws_scheme_sca
	205
	206	USE cpulog, &
	207	ONLY: cpu_log, log_point, log_point_s
	208
	209	USE indices, &
	210	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
[1380]	211	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
[1320]	212
	213	USE interaction_droplets_ptq_mod, &
	214	ONLY: interaction_droplets_ptq
	215
	216	USE kinds
	217
[1496]	218	USE land_surface_model_mod, &
[1691]	219	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
	220	skip_time_do_lsm
[1496]	221
[1320]	222	USE ls_forcing_mod, &
	223	ONLY: ls_forcing_surf, ls_forcing_vert
	224
[1365]	225	USE nudge_mod, &
[1380]	226	ONLY: calc_tnudge, nudge_ref
[1365]	227
[1320]	228	USE particle_attributes, &
[1671]	229	ONLY: particle_advection, particle_advection_start, &
	230	use_sgs_for_particles, wang_kernel
[1320]	231
[1]	232	USE pegrid
	233
[1320]	234	USE production_e_mod, &
	235	ONLY: production_e_init
	236
[1402]	237	USE progress_bar, &
	238	ONLY: finish_progress_bar, output_progress_bar
	239
[1320]	240	USE prognostic_equations_mod, &
	241	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
	242	prognostic_equations_vector
	243
[1496]	244	USE radiation_model_mod, &
[1691]	245	ONLY: dt_radiation, force_radiation_call, radiation, &
	246	radiation_clearsky, radiation_rrtmg, radiation_scheme, &
	247	skip_time_do_radiation, time_radiation
[1496]	248
[1320]	249	USE statistics, &
[1365]	250	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
[1320]	251
[1691]	252	USE surface_layer_fluxes_mod, &
	253	ONLY: surface_layer_fluxes
	254
[1320]	255	USE user_actions_mod, &
	256	ONLY: user_actions
	257
[1]	258	IMPLICIT NONE
	259
[1682]	260	CHARACTER (LEN=9) :: time_to_string !<
[1]	261
[1682]	262	INTEGER(iwp) :: netcdf_data_format_save !<
[1320]	263
[1]	264	!
	265	!-- At the beginning of a simulation determine the time step as well as
	266	!-- determine and print out the run control parameters
[1342]	267	IF ( simulated_time == 0.0_wp ) CALL timestep
[667]	268
[1]	269	CALL run_control
	270
[667]	271
[108]	272	!
	273	!-- Data exchange between coupled models in case that a call has been omitted
	274	!-- at the end of the previous run of a job chain.
[291]	275	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[108]	276	!
	277	!-- In case of model termination initiated by the local model the coupler
	278	!-- must not be called because this would again cause an MPI hang.
	279	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
	280	CALL surface_coupler
	281	time_coupling = time_coupling - dt_coupling
	282	ENDDO
[1342]	283	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
[348]	284	THEN
	285	time_coupling = time_since_reference_point
	286	ENDIF
[108]	287	ENDIF
	288
	289
[1]	290	#if defined( __dvrp_graphics )
	291	!
	292	!-- Time measurement with dvrp software
	293	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	294	#endif
	295
[1402]	296	CALL location_message( 'start with time-stepping', .TRUE. )
[1]	297	!
	298	!-- Start of the time loop
	299	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
	300	.NOT. terminate_run )
	301
	302	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
[1221]	303
[1]	304	!
	305	!-- Determine size of next time step
[1342]	306	IF ( simulated_time /= 0.0_wp ) THEN
[1221]	307	CALL timestep
	308	ENDIF
	309
[1]	310	!
[1241]	311	!-- Determine ug, vg and w_subs in dependence on data from external file
	312	!-- LSF_DATA
[1365]	313	IF ( large_scale_forcing .AND. lsf_vert ) THEN
[1241]	314	CALL ls_forcing_vert ( simulated_time )
[1365]	315	sums_ls_l = 0.0_wp
[1241]	316	ENDIF
	317
	318	!
[1380]	319	!-- Set pt_init and q_init to the current profiles taken from
	320	!-- NUDGING_DATA
	321	IF ( nudging ) THEN
	322	CALL nudge_ref ( simulated_time )
	323	!
	324	!-- Store temperature gradient at the top boundary for possible Neumann
	325	!-- boundary condition
	326	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
	327	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
	328	ENDIF
	329
	330	!
[1]	331	!-- Execute the user-defined actions
	332	CALL user_actions( 'before_timestep' )
	333
	334	!
	335	!-- Start of intermediate step loop
	336	intermediate_timestep_count = 0
	337	DO WHILE ( intermediate_timestep_count < &
	338	intermediate_timestep_count_max )
	339
	340	intermediate_timestep_count = intermediate_timestep_count + 1
	341
	342	!
	343	!-- Set the steering factors for the prognostic equations which depend
	344	!-- on the timestep scheme
	345	CALL timestep_scheme_steering
	346
	347	!
[1128]	348	!-- Calculate those variables needed in the tendency terms which need
	349	!-- global communication
[1179]	350	IF ( .NOT. use_single_reference_value .AND. &
	351	.NOT. use_initial_profile_as_reference ) THEN
	352	!
	353	!-- Horizontally averaged profiles to be used as reference state in
	354	!-- buoyancy terms (WARNING: only the respective last call of
	355	!-- calc_mean_profile defines the reference state!)
[1365]	356	IF ( .NOT. neutral ) THEN
	357	CALL calc_mean_profile( pt, 4 )
	358	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
	359	ENDIF
	360	IF ( ocean ) THEN
	361	CALL calc_mean_profile( rho, 64 )
	362	ref_state(:) = hom(:,1,64,0)
	363	ENDIF
	364	IF ( humidity ) THEN
	365	CALL calc_mean_profile( vpt, 44 )
	366	ref_state(:) = hom(:,1,44,0)
	367	ENDIF
	368
[1179]	369	ENDIF
	370
[1128]	371	IF ( .NOT. constant_diffusion ) CALL production_e_init
	372	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
	373	intermediate_timestep_count == 1 ) CALL ws_statistics
[1365]	374	!
	375	!-- In case of nudging calculate current nudging time scale and horizontal
[1380]	376	!-- means of u, v, pt and q
[1365]	377	IF ( nudging ) THEN
	378	CALL calc_tnudge( simulated_time )
	379	CALL calc_mean_profile( u, 1 )
	380	CALL calc_mean_profile( v, 2 )
	381	CALL calc_mean_profile( pt, 4 )
	382	CALL calc_mean_profile( q, 41 )
	383	ENDIF
[1128]	384
	385	!
[1]	386	!-- Solve the prognostic equations. A fast cache optimized version with
	387	!-- only one single loop is used in case of Piascek-Williams advection
	388	!-- scheme. NEC vector machines use a different version, because
	389	!-- in the other versions a good vectorization is prohibited due to
	390	!-- inlining problems.
[1019]	391	IF ( loop_optimization == 'cache' ) THEN
	392	CALL prognostic_equations_cache
	393	ELSEIF ( loop_optimization == 'vector' ) THEN
[63]	394	CALL prognostic_equations_vector
[1015]	395	ELSEIF ( loop_optimization == 'acc' ) THEN
[1171]	396	i_left = nxl; i_right = nxr
	397	j_south = nys; j_north = nyn
	398	CALL prognostic_equations_acc
	399
	400	! i_left = nxl; i_right = nxl+nbgp-1
[1128]	401	! j_south = nys; j_north = nyn
	402	! CALL prognostic_equations_acc
[1171]	403	! i_left = nxr-nbgp+1; i_right = nxr
	404	! j_south = nys; j_north = nyn
	405	! CALL prognostic_equations_acc
[1128]	406
	407	!
	408	!-- Exchange of ghost points (lateral boundary conditions)
	409	IF ( background_communication ) THEN
	410
	411	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
	412
	413	send_receive = 'lr'
	414	sendrecv_in_background = .TRUE.
	415	req = 0
	416	req_count = 0
	417
	418	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	419	on_device = .TRUE. ! to be removed after complete porting
	420	ELSE ! of ghost point exchange
	421	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	422	ENDIF
	423
	424	CALL exchange_horiz( u_p, nbgp )
	425	CALL exchange_horiz( v_p, nbgp )
	426	CALL exchange_horiz( w_p, nbgp )
	427	CALL exchange_horiz( pt_p, nbgp )
	428	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	429	IF ( ocean ) THEN
	430	CALL exchange_horiz( sa_p, nbgp )
	431	CALL exchange_horiz( rho, nbgp )
	432	CALL exchange_horiz( prho, nbgp )
	433	ENDIF
	434	IF (humidity .OR. passive_scalar) THEN
	435	CALL exchange_horiz( q_p, nbgp )
	436	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	437	CALL exchange_horiz( qr_p, nbgp )
	438	CALL exchange_horiz( nr_p, nbgp )
	439	ENDIF
	440	ENDIF
	441	IF ( cloud_droplets ) THEN
	442	CALL exchange_horiz( ql, nbgp )
	443	CALL exchange_horiz( ql_c, nbgp )
	444	CALL exchange_horiz( ql_v, nbgp )
	445	CALL exchange_horiz( ql_vp, nbgp )
	446	ENDIF
[1671]	447	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	448	THEN
	449	CALL exchange_horiz( diss, nbgp )
	450	ENDIF
[1128]	451
	452	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	453	on_device = .FALSE. ! to be removed after complete porting
	454	ELSE ! of ghost point exchange
	455	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	456	ENDIF
	457
	458	sendrecv_in_background = .FALSE.
	459
	460	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
	461
	462	ENDIF
	463
[1171]	464	! i_left = nxl+nbgp; i_right = nxr-nbgp
	465	! j_south = nys; j_north = nys+nbgp-1
	466	! CALL prognostic_equations_acc
	467	! i_left = nxl+nbgp; i_right = nxr-nbgp
	468	! j_south = nyn-nbgp+1; j_north = nyn
	469	! CALL prognostic_equations_acc
[1128]	470
	471	IF ( background_communication ) THEN
	472	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
	473	#if defined( __parallel )
	474	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	475	#endif
	476	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
	477
	478	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
	479
	480	send_receive = 'ns'
	481	sendrecv_in_background = .TRUE.
	482	req = 0
	483	req_count = 0
	484
	485	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	486	on_device = .TRUE. ! to be removed after complete porting
	487	ELSE ! of ghost point exchange
	488	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	489	ENDIF
	490
	491	CALL exchange_horiz( u_p, nbgp )
	492	CALL exchange_horiz( v_p, nbgp )
	493	CALL exchange_horiz( w_p, nbgp )
	494	CALL exchange_horiz( pt_p, nbgp )
	495	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	496	IF ( ocean ) THEN
	497	CALL exchange_horiz( sa_p, nbgp )
	498	CALL exchange_horiz( rho, nbgp )
	499	CALL exchange_horiz( prho, nbgp )
	500	ENDIF
	501	IF (humidity .OR. passive_scalar) THEN
	502	CALL exchange_horiz( q_p, nbgp )
	503	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	504	CALL exchange_horiz( qr_p, nbgp )
	505	CALL exchange_horiz( nr_p, nbgp )
	506	ENDIF
	507	ENDIF
	508	IF ( cloud_droplets ) THEN
	509	CALL exchange_horiz( ql, nbgp )
	510	CALL exchange_horiz( ql_c, nbgp )
	511	CALL exchange_horiz( ql_v, nbgp )
	512	CALL exchange_horiz( ql_vp, nbgp )
	513	ENDIF
[1671]	514	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	515	THEN
	516	CALL exchange_horiz( diss, nbgp )
	517	ENDIF
[1128]	518
	519	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	520	on_device = .FALSE. ! to be removed after complete porting
	521	ELSE ! of ghost point exchange
	522	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	523	ENDIF
	524
	525	sendrecv_in_background = .FALSE.
	526
	527	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	528
	529	ENDIF
	530
[1171]	531	! i_left = nxl+nbgp; i_right = nxr-nbgp
	532	! j_south = nys+nbgp; j_north = nyn-nbgp
	533	! CALL prognostic_equations_acc
[1128]	534
	535	IF ( background_communication ) THEN
	536	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
	537	#if defined( __parallel )
	538	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	539	#endif
	540	send_receive = 'al'
	541	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
	542	ENDIF
	543
[1]	544	ENDIF
	545
	546	!
[849]	547	!-- Particle transport/physics with the Lagrangian particle model
	548	!-- (only once during intermediate steps, because it uses an Euler-step)
[1128]	549	!-- ### particle model should be moved before prognostic_equations, in order
	550	!-- to regard droplet interactions directly
[63]	551	IF ( particle_advection .AND. &
	552	simulated_time >= particle_advection_start .AND. &
[1]	553	intermediate_timestep_count == 1 ) THEN
[849]	554	CALL lpm
	555	first_call_lpm = .FALSE.
[1]	556	ENDIF
	557
	558	!
	559	!-- Interaction of droplets with temperature and specific humidity.
	560	!-- Droplet condensation and evaporation is calculated within
	561	!-- advec_particles.
	562	IF ( cloud_droplets .AND. &
	563	intermediate_timestep_count == intermediate_timestep_count_max )&
	564	THEN
	565	CALL interaction_droplets_ptq
	566	ENDIF
	567
	568	!
	569	!-- Exchange of ghost points (lateral boundary conditions)
[1128]	570	IF ( .NOT. background_communication ) THEN
[1113]	571
[1128]	572	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
[1113]	573
[1128]	574	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	575	on_device = .TRUE. ! to be removed after complete porting
	576	ELSE ! of ghost point exchange
	577	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
[1053]	578	ENDIF
[1]	579
[1128]	580	CALL exchange_horiz( u_p, nbgp )
	581	CALL exchange_horiz( v_p, nbgp )
	582	CALL exchange_horiz( w_p, nbgp )
	583	CALL exchange_horiz( pt_p, nbgp )
	584	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	585	IF ( ocean ) THEN
	586	CALL exchange_horiz( sa_p, nbgp )
	587	CALL exchange_horiz( rho, nbgp )
	588	CALL exchange_horiz( prho, nbgp )
	589	ENDIF
	590	IF (humidity .OR. passive_scalar) THEN
	591	CALL exchange_horiz( q_p, nbgp )
[1179]	592	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	593	precipitation ) THEN
[1128]	594	CALL exchange_horiz( qr_p, nbgp )
	595	CALL exchange_horiz( nr_p, nbgp )
	596	ENDIF
	597	ENDIF
	598	IF ( cloud_droplets ) THEN
	599	CALL exchange_horiz( ql, nbgp )
	600	CALL exchange_horiz( ql_c, nbgp )
	601	CALL exchange_horiz( ql_v, nbgp )
	602	CALL exchange_horiz( ql_vp, nbgp )
	603	ENDIF
[1671]	604	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	605	THEN
	606	CALL exchange_horiz( diss, nbgp )
	607	ENDIF
[1128]	608
	609	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	610	on_device = .FALSE. ! to be removed after complete porting
	611	ELSE ! of ghost point exchange
	612	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	613	ENDIF
	614
	615	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	616
[1113]	617	ENDIF
	618
[1]	619	!
	620	!-- Boundary conditions for the prognostic quantities (except of the
	621	!-- velocities at the outflow in case of a non-cyclic lateral wall)
[1113]	622	CALL boundary_conds
[1]	623
	624	!
[73]	625	!-- Swap the time levels in preparation for the next time step.
	626	CALL swap_timelevel
	627
	628	!
[1]	629	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
	630	!-- when a sloping surface is used
	631	IF ( sloping_surface ) THEN
[707]	632	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
	633	pt_slope_offset
	634	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
	635	pt_slope_offset
[1]	636	ENDIF
	637
	638	!
[151]	639	!-- Impose a turbulent inflow using the recycling method
	640	IF ( turbulent_inflow ) CALL inflow_turbulence
	641
	642	!
[1]	643	!-- Impose a random perturbation on the horizontal velocity field
[106]	644	IF ( create_disturbances .AND. &
	645	( call_psolver_at_all_substeps .AND. &
[1]	646	intermediate_timestep_count == intermediate_timestep_count_max )&
[106]	647	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
	648	intermediate_timestep_count == 1 ) ) &
[1]	649	THEN
	650	time_disturb = time_disturb + dt_3d
	651	IF ( time_disturb >= dt_disturb ) THEN
[1111]	652	!$acc update host( u, v )
[1113]	653	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
[87]	654	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
[75]	655	CALL disturb_field( nzb_u_inner, tend, u )
	656	CALL disturb_field( nzb_v_inner, tend, v )
[707]	657	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
[1]	658	!
	659	!-- Runs with a non-cyclic lateral wall need perturbations
	660	!-- near the inflow throughout the whole simulation
	661	dist_range = 1
[75]	662	CALL disturb_field( nzb_u_inner, tend, u )
	663	CALL disturb_field( nzb_v_inner, tend, v )
[1]	664	dist_range = 0
	665	ENDIF
[1113]	666	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
[1111]	667	!$acc update device( u, v )
[1]	668	time_disturb = time_disturb - dt_disturb
	669	ENDIF
	670	ENDIF
	671
	672	!
	673	!-- Reduce the velocity divergence via the equation for perturbation
	674	!-- pressure.
[106]	675	IF ( intermediate_timestep_count == 1 .OR. &
	676	call_psolver_at_all_substeps ) THEN
[1]	677	CALL pres
	678	ENDIF
	679
	680	!
	681	!-- If required, compute liquid water content
[1015]	682	IF ( cloud_physics ) THEN
	683	CALL calc_liquid_water_content
	684	!$acc update device( ql )
	685	ENDIF
[1115]	686	!
	687	!-- If required, compute virtual potential temperature
	688	IF ( humidity ) THEN
	689	CALL compute_vpt
	690	!$acc update device( vpt )
	691	ENDIF
[1585]	692
[1]	693	!
	694	!-- Compute the diffusion quantities
	695	IF ( .NOT. constant_diffusion ) THEN
	696
	697	!
[1276]	698	!-- Determine surface fluxes shf and qsws and surface values
	699	!-- pt_surface and q_surface in dependence on data from external
	700	!-- file LSF_DATA respectively
	701	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
	702	intermediate_timestep_count == intermediate_timestep_count_max )&
	703	THEN
	704	CALL ls_forcing_surf ( simulated_time )
	705	ENDIF
	706
	707	!
[1691]	708	!-- First the vertical fluxes in the surface (constant flux) layer are computed
	709	IF ( constant_flux_layer ) THEN
	710	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
	711	CALL surface_layer_fluxes
	712	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
[1]	713	ENDIF
[1241]	714
[1]	715	!
[1691]	716	!-- If required, solve the energy balance for the surface and run soil
	717	!-- model
	718	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
	719
	720	CALL cpu_log( log_point(54), 'land_surface', 'start' )
	721	CALL lsm_energy_balance
	722	CALL lsm_soil_model
	723	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
	724	ENDIF
	725	!
[1]	726	!-- Compute the diffusion coefficients
	727	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
[75]	728	IF ( .NOT. humidity ) THEN
[97]	729	IF ( ocean ) THEN
[388]	730	CALL diffusivities( prho, prho_reference )
[97]	731	ELSE
	732	CALL diffusivities( pt, pt_reference )
	733	ENDIF
[1]	734	ELSE
[97]	735	CALL diffusivities( vpt, pt_reference )
[1]	736	ENDIF
	737	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
	738
	739	ENDIF
	740
[1691]	741	!
	742	!-- If required, calculate radiative fluxes and heating rates
	743	IF ( radiation .AND. intermediate_timestep_count &
	744	== intermediate_timestep_count_max .AND. simulated_time > &
	745	skip_time_do_radiation ) THEN
	746
	747	time_radiation = time_radiation + dt_3d
	748
	749	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
	750	THEN
	751
	752	CALL cpu_log( log_point(50), 'radiation', 'start' )
	753
	754	IF ( .NOT. force_radiation_call ) THEN
	755	time_radiation = time_radiation - dt_radiation
	756	ELSE
	757	WRITE(9,*) "Unscheduled radiation call at ", simulated_time
	758	CALL LOCAL_FLUSH ( 9 )
	759	ENDIF
	760
	761	IF ( radiation_scheme == 'clear-sky' ) THEN
	762	CALL radiation_clearsky
	763	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
	764	CALL radiation_rrtmg
	765	ENDIF
	766
	767	CALL cpu_log( log_point(50), 'radiation', 'stop' )
	768	ENDIF
	769	ENDIF
	770
[1]	771	ENDDO ! Intermediate step loop
	772
	773	!
	774	!-- Increase simulation time and output times
[1111]	775	nr_timesteps_this_run = nr_timesteps_this_run + 1
[291]	776	current_timestep_number = current_timestep_number + 1
	777	simulated_time = simulated_time + dt_3d
	778	simulated_time_chr = time_to_string( simulated_time )
	779	time_since_reference_point = simulated_time - coupling_start_time
	780
[1]	781	IF ( simulated_time >= skip_time_data_output_av ) THEN
	782	time_do_av = time_do_av + dt_3d
	783	ENDIF
	784	IF ( simulated_time >= skip_time_do2d_xy ) THEN
	785	time_do2d_xy = time_do2d_xy + dt_3d
	786	ENDIF
	787	IF ( simulated_time >= skip_time_do2d_xz ) THEN
	788	time_do2d_xz = time_do2d_xz + dt_3d
	789	ENDIF
	790	IF ( simulated_time >= skip_time_do2d_yz ) THEN
	791	time_do2d_yz = time_do2d_yz + dt_3d
	792	ENDIF
	793	IF ( simulated_time >= skip_time_do3d ) THEN
	794	time_do3d = time_do3d + dt_3d
	795	ENDIF
[410]	796	DO mid = 1, masks
	797	IF ( simulated_time >= skip_time_domask(mid) ) THEN
	798	time_domask(mid)= time_domask(mid) + dt_3d
	799	ENDIF
	800	ENDDO
[1]	801	time_dvrp = time_dvrp + dt_3d
	802	IF ( simulated_time >= skip_time_dosp ) THEN
	803	time_dosp = time_dosp + dt_3d
	804	ENDIF
	805	time_dots = time_dots + dt_3d
[849]	806	IF ( .NOT. first_call_lpm ) THEN
[1]	807	time_dopts = time_dopts + dt_3d
	808	ENDIF
	809	IF ( simulated_time >= skip_time_dopr ) THEN
	810	time_dopr = time_dopr + dt_3d
	811	ENDIF
	812	time_dopr_listing = time_dopr_listing + dt_3d
	813	time_run_control = time_run_control + dt_3d
	814
	815	!
[102]	816	!-- Data exchange between coupled models
[291]	817	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[102]	818	time_coupling = time_coupling + dt_3d
[343]	819
[108]	820	!
	821	!-- In case of model termination initiated by the local model
	822	!-- (terminate_coupled > 0), the coupler must be skipped because it would
	823	!-- cause an MPI intercomminucation hang.
	824	!-- If necessary, the coupler will be called at the beginning of the
	825	!-- next restart run.
	826	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
[102]	827	CALL surface_coupler
	828	time_coupling = time_coupling - dt_coupling
	829	ENDDO
	830	ENDIF
	831
	832	!
[46]	833	!-- Execute user-defined actions
	834	CALL user_actions( 'after_integration' )
	835
	836	!
[1]	837	!-- If Galilei transformation is used, determine the distance that the
	838	!-- model has moved so far
	839	IF ( galilei_transformation ) THEN
	840	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
	841	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
	842	ENDIF
	843
	844	!
	845	!-- Check, if restart is necessary (because cpu-time is expiring or
	846	!-- because it is forced by user) and set stop flag
[108]	847	!-- This call is skipped if the remote model has already initiated a restart.
	848	IF ( .NOT. terminate_run ) CALL check_for_restart
[1]	849
	850	!
	851	!-- Carry out statistical analysis and output at the requested output times.
	852	!-- The MOD function is used for calculating the output time counters (like
	853	!-- time_dopr) in order to regard a possible decrease of the output time
	854	!-- interval in case of restart runs
	855
	856	!
	857	!-- Set a flag indicating that so far no statistics have been created
	858	!-- for this time step
	859	flow_statistics_called = .FALSE.
	860
	861	!
	862	!-- If required, call flow_statistics for averaging in time
[1342]	863	IF ( averaging_interval_pr /= 0.0_wp .AND. &
[1]	864	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
	865	simulated_time >= skip_time_dopr ) THEN
	866	time_dopr_av = time_dopr_av + dt_3d
	867	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
	868	do_sum = .TRUE.
	869	time_dopr_av = MOD( time_dopr_av, &
	870	MAX( dt_averaging_input_pr, dt_3d ) )
	871	ENDIF
	872	ENDIF
	873	IF ( do_sum ) CALL flow_statistics
	874
	875	!
[410]	876	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
[1342]	877	IF ( averaging_interval /= 0.0_wp .AND. &
[1]	878	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
	879	simulated_time >= skip_time_data_output_av ) &
	880	THEN
	881	time_do_sla = time_do_sla + dt_3d
	882	IF ( time_do_sla >= dt_averaging_input ) THEN
	883	CALL sum_up_3d_data
	884	average_count_3d = average_count_3d + 1
	885	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
	886	ENDIF
	887	ENDIF
	888
	889	!
	890	!-- Calculate spectra for time averaging
[1342]	891	IF ( averaging_interval_sp /= 0.0_wp .AND. &
[1]	892	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
	893	simulated_time >= skip_time_dosp ) THEN
	894	time_dosp_av = time_dosp_av + dt_3d
	895	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
	896	CALL calc_spectra
	897	time_dosp_av = MOD( time_dosp_av, &
	898	MAX( dt_averaging_input_pr, dt_3d ) )
	899	ENDIF
	900	ENDIF
	901
	902	!
	903	!-- Computation and output of run control parameters.
[1001]	904	!-- This is also done whenever perturbations have been imposed
[1]	905	IF ( time_run_control >= dt_run_control .OR. &
[1001]	906	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
[1]	907	THEN
	908	CALL run_control
	909	IF ( time_run_control >= dt_run_control ) THEN
	910	time_run_control = MOD( time_run_control, &
	911	MAX( dt_run_control, dt_3d ) )
	912	ENDIF
	913	ENDIF
	914
	915	!
	916	!-- Profile output (ASCII) on file
	917	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
	918	CALL print_1d
	919	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
	920	dt_3d ) )
	921	ENDIF
	922
	923	!
	924	!-- Graphic output for PROFIL
	925	IF ( time_dopr >= dt_dopr ) THEN
	926	IF ( dopr_n /= 0 ) CALL data_output_profiles
	927	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
[1342]	928	time_dopr_av = 0.0_wp ! due to averaging (see above)
[1]	929	ENDIF
	930
	931	!
	932	!-- Graphic output for time series
	933	IF ( time_dots >= dt_dots ) THEN
[48]	934	CALL data_output_tseries
[1]	935	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
	936	ENDIF
	937
	938	!
	939	!-- Output of spectra (formatted for use with PROFIL), in case of no
	940	!-- time averaging, spectra has to be calculated before
	941	IF ( time_dosp >= dt_dosp ) THEN
	942	IF ( average_count_sp == 0 ) CALL calc_spectra
	943	CALL data_output_spectra
	944	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
	945	ENDIF
	946
	947	!
	948	!-- 2d-data output (cross-sections)
	949	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
	950	CALL data_output_2d( 'xy', 0 )
	951	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
	952	ENDIF
	953	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
	954	CALL data_output_2d( 'xz', 0 )
	955	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
	956	ENDIF
	957	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
	958	CALL data_output_2d( 'yz', 0 )
	959	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
	960	ENDIF
	961
	962	!
	963	!-- 3d-data output (volume data)
	964	IF ( time_do3d >= dt_do3d ) THEN
	965	CALL data_output_3d( 0 )
	966	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
	967	ENDIF
	968
	969	!
[410]	970	!-- masked data output
[1308]	971	!-- Parallel netcdf output is not tested so far for masked data, hence
	972	!-- netcdf_data_format is switched back to non-paralell output.
	973	netcdf_data_format_save = netcdf_data_format
	974	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	975	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	976	DO mid = 1, masks
	977	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
	978	CALL data_output_mask( 0 )
	979	time_domask(mid) = MOD( time_domask(mid), &
	980	MAX( dt_domask(mid), dt_3d ) )
	981	ENDIF
	982	ENDDO
[1308]	983	netcdf_data_format = netcdf_data_format_save
[410]	984
	985	!
	986	!-- Output of time-averaged 2d/3d/masked data
[1]	987	IF ( time_do_av >= dt_data_output_av ) THEN
	988	CALL average_3d_data
	989	CALL data_output_2d( 'xy', 1 )
	990	CALL data_output_2d( 'xz', 1 )
	991	CALL data_output_2d( 'yz', 1 )
	992	CALL data_output_3d( 1 )
[1308]	993	!-- Parallel netcdf output is not tested so far for masked data, hence
	994	!-- netcdf_data_format is switched back to non-paralell output.
	995	netcdf_data_format_save = netcdf_data_format
	996	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	997	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	998	DO mid = 1, masks
	999	CALL data_output_mask( 1 )
	1000	ENDDO
[1308]	1001	netcdf_data_format = netcdf_data_format_save
[1]	1002	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
	1003	ENDIF
	1004
	1005	!
	1006	!-- Output of particle time series
[253]	1007	IF ( particle_advection ) THEN
	1008	IF ( time_dopts >= dt_dopts .OR. &
	1009	( simulated_time >= particle_advection_start .AND. &
[849]	1010	first_call_lpm ) ) THEN
[253]	1011	CALL data_output_ptseries
	1012	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
	1013	ENDIF
[1]	1014	ENDIF
	1015
	1016	!
	1017	!-- Output of dvrp-graphics (isosurface, particles, slicer)
	1018	#if defined( __dvrp_graphics )
	1019	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
	1020	#endif
	1021	IF ( time_dvrp >= dt_dvrp ) THEN
	1022	CALL data_output_dvrp
	1023	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
	1024	ENDIF
	1025	#if defined( __dvrp_graphics )
	1026	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	1027	#endif
	1028
	1029	!
	1030	!-- If required, set the heat flux for the next time step at a random value
	1031	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
	1032
	1033	!
	1034	!-- Execute user-defined actions
	1035	CALL user_actions( 'after_timestep' )
	1036
[1402]	1037	!
	1038	!-- Output elapsed simulated time in form of a progress bar on stdout
	1039	IF ( myid == 0 ) CALL output_progress_bar
	1040
[1]	1041	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
	1042
[667]	1043
[1]	1044	ENDDO ! time loop
	1045
[1402]	1046	IF ( myid == 0 ) CALL finish_progress_bar
	1047
[1]	1048	#if defined( __dvrp_graphics )
	1049	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
	1050	#endif
	1051
[1402]	1052	CALL location_message( 'finished time-stepping', .TRUE. )
[1384]	1053
[1]	1054	END SUBROUTINE time_integration

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