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source: palm/trunk/SOURCE/time_integration.f90 @ 1752

Last change on this file since 1752 was 1737, checked in by raasch, 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	!
[1737]	22	!
[1366]	23	! Former revisions:
	24	! -----------------
	25	! $Id: time_integration.f90 1737 2015-12-04 08:59:40Z maronga $
	26	!
[1737]	27	! 1736 2015-12-04 08:56:33Z raasch
	28	! no perturbations added to total domain if energy limit has been set zero
	29	!
[1692]	30	! 1691 2015-10-26 16:17:44Z maronga
	31	! Added option for spin-ups without land surface and radiation models. Moved calls
	32	! for radiation and lan surface schemes.
	33	!
[1683]	34	! 1682 2015-10-07 23:56:08Z knoop
	35	! Code annotations made doxygen readable
	36	!
[1672]	37	! 1671 2015-09-25 03:29:37Z raasch
	38	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
	39	! for particles
	40	!
[1586]	41	! 1585 2015-04-30 07:05:52Z maronga
	42	! Moved call of radiation scheme. Added support for RRTM
	43	!
[1552]	44	! 1551 2015-03-03 14:18:16Z maronga
	45	! Added interface for different radiation schemes.
	46	!
[1497]	47	! 1496 2014-12-02 17:25:50Z maronga
	48	! Added calls for the land surface model and radiation scheme
	49	!
[1403]	50	! 1402 2014-05-09 14:25:13Z raasch
	51	! location messages modified
	52	!
[1385]	53	! 1384 2014-05-02 14:31:06Z raasch
	54	! location messages added
	55	!
[1381]	56	! 1380 2014-04-28 12:40:45Z heinze
	57	! CALL of nudge_ref added
	58	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
	59	!
[1366]	60	! 1365 2014-04-22 15:03:56Z boeske
[1365]	61	! Reset sums_ls_l to zero at each timestep
	62	! +sums_ls_l
	63	! Calculation of reference state (previously in subroutine calc_mean_profile)
	64
[1343]	65	! 1342 2014-03-26 17:04:47Z kanani
	66	! REAL constants defined as wp-kind
	67	!
[1321]	68	! 1320 2014-03-20 08:40:49Z raasch
[1320]	69	! ONLY-attribute added to USE-statements,
	70	! kind-parameters added to all INTEGER and REAL declaration statements,
	71	! kinds are defined in new module kinds,
	72	! old module precision_kind is removed,
	73	! revision history before 2012 removed,
	74	! comment fields (!:) to be used for variable explanations added to
	75	! all variable declaration statements
[1319]	76	! 1318 2014-03-17 13:35:16Z raasch
	77	! module interfaces removed
	78	!
[1309]	79	! 1308 2014-03-13 14:58:42Z fricke
	80	! +netcdf_data_format_save
	81	! For masked data, parallel netcdf output is not tested so far, hence
	82	! netcdf_data_format is switched back to non-paralell output.
	83	!
[1277]	84	! 1276 2014-01-15 13:40:41Z heinze
	85	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
	86	!
[1258]	87	! 1257 2013-11-08 15:18:40Z raasch
	88	! acc-update-host directive for timestep removed
	89	!
[1242]	90	! 1241 2013-10-30 11:36:58Z heinze
	91	! Generalize calc_mean_profile for wider use
	92	! Determine shf and qsws in dependence on data from LSF_DATA
	93	! Determine ug and vg in dependence on data from LSF_DATA
[1222]	94	! 1221 2013-09-10 08:59:13Z raasch
	95	! host update of arrays before timestep is called
	96	!
[1182]	97	! 1179 2013-06-14 05:57:58Z raasch
	98	! mean profiles for reference state are only calculated if required,
	99	! small bugfix for background communication
	100	!
[1172]	101	! 1171 2013-05-30 11:27:45Z raasch
	102	! split of prognostic_equations deactivated (comment lines), for the time being
	103	!
[1132]	104	! 1128 2013-04-12 06:19:32Z raasch
[1128]	105	! asynchronous transfer of ghost point data realized for acc-optimized version:
	106	! prognostic_equations are first called two times for those points required for
	107	! the left-right and north-south exchange, respectively, and then for the
	108	! remaining points,
	109	! those parts requiring global communication moved from prognostic_equations to
	110	! here
[392]	111	!
[1116]	112	! 1115 2013-03-26 18:16:16Z hoffmann
	113	! calculation of qr and nr is restricted to precipitation
	114	!
[1114]	115	! 1113 2013-03-10 02:48:14Z raasch
	116	! GPU-porting of boundary conditions,
	117	! openACC directives updated
	118	! formal parameter removed from routine boundary_conds
	119	!
[1112]	120	! 1111 2013-03-08 23:54:10Z raasch
	121	! +internal timestep counter for cpu statistics added,
	122	! openACC directives updated
	123	!
[1093]	124	! 1092 2013-02-02 11:24:22Z raasch
	125	! unused variables removed
	126	!
[1066]	127	! 1065 2012-11-22 17:42:36Z hoffmann
	128	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
	129	!
[1054]	130	! 1053 2012-11-13 17:11:03Z hoffmann
	131	! exchange of ghost points for nr, qr added
	132	!
[1037]	133	! 1036 2012-10-22 13:43:42Z raasch
	134	! code put under GPL (PALM 3.9)
	135	!
[1020]	136	! 1019 2012-09-28 06:46:45Z raasch
	137	! non-optimized version of prognostic_equations removed
	138	!
[1017]	139	! 1015 2012-09-27 09:23:24Z raasch
	140	! +call of prognostic_equations_acc
	141	!
[1002]	142	! 1001 2012-09-13 14:08:46Z raasch
	143	! all actions concerning leapfrog- and upstream-spline-scheme removed
	144	!
[850]	145	! 849 2012-03-15 10:35:09Z raasch
	146	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
	147	!
[826]	148	! 825 2012-02-19 03:03:44Z raasch
	149	! wang_collision_kernel renamed wang_kernel
	150	!
[1]	151	! Revision 1.1 1997/08/11 06:19:04 raasch
	152	! Initial revision
	153	!
	154	!
	155	! Description:
	156	! ------------
[1682]	157	!> Integration in time of the model equations, statistical analysis and graphic
	158	!> output
[1]	159	!------------------------------------------------------------------------------!
[1682]	160	SUBROUTINE time_integration
	161
[1]	162
[1320]	163	USE advec_ws, &
	164	ONLY: ws_statistics
	165
	166	USE arrays_3d, &
[1380]	167	ONLY: diss, dzu, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, ql, &
	168	ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, u, &
	169	u_p, v, vpt, v_p, w_p
[1320]	170
[1365]	171	USE calc_mean_profile_mod, &
[1320]	172	ONLY: calc_mean_profile
	173
	174	USE control_parameters, &
	175	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
	176	average_count_sp, averaging_interval, averaging_interval_pr, &
[1380]	177	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
	178	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
[1691]	179	cloud_physics, constant_flux_layer, constant_heatflux, &
	180	create_disturbances, dopr_n, constant_diffusion, coupling_mode, &
	181	coupling_start_time, current_timestep_number, &
	182	disturbance_created, disturbance_energy_limit, dist_range, &
	183	do_sum, dt_3d, dt_averaging_input, dt_averaging_input_pr, &
	184	dt_coupling, dt_data_output_av, dt_disturb, dt_do2d_xy, &
	185	dt_do2d_xz, dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
[1320]	186	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
	187	end_time, first_call_lpm, galilei_transformation, humidity, &
	188	icloud_scheme, intermediate_timestep_count, &
	189	intermediate_timestep_count_max, large_scale_forcing, &
	190	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
[1365]	191	netcdf_data_format, neutral, nr_timesteps_this_run, nudging, &
[1691]	192	ocean, on_device, passive_scalar, precipitation, &
[1320]	193	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
	194	run_coupled, simulated_time, simulated_time_chr, &
	195	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
	196	skip_time_do3d, skip_time_domask, skip_time_dopr, &
	197	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
	198	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
	199	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
	200	time_do3d, time_domask, time_dopr, time_dopr_av, &
	201	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
	202	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
[1496]	203	time_run_control, time_since_reference_point, &
	204	turbulence, &
[1320]	205	turbulent_inflow, use_initial_profile_as_reference, &
	206	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
	207	ws_scheme_sca
	208
	209	USE cpulog, &
	210	ONLY: cpu_log, log_point, log_point_s
	211
	212	USE indices, &
	213	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
[1380]	214	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
[1320]	215
	216	USE interaction_droplets_ptq_mod, &
	217	ONLY: interaction_droplets_ptq
	218
	219	USE kinds
	220
[1496]	221	USE land_surface_model_mod, &
[1691]	222	ONLY: land_surface, lsm_energy_balance, lsm_soil_model, &
	223	skip_time_do_lsm
[1496]	224
[1320]	225	USE ls_forcing_mod, &
	226	ONLY: ls_forcing_surf, ls_forcing_vert
	227
[1365]	228	USE nudge_mod, &
[1380]	229	ONLY: calc_tnudge, nudge_ref
[1365]	230
[1320]	231	USE particle_attributes, &
[1671]	232	ONLY: particle_advection, particle_advection_start, &
	233	use_sgs_for_particles, wang_kernel
[1320]	234
[1]	235	USE pegrid
	236
[1320]	237	USE production_e_mod, &
	238	ONLY: production_e_init
	239
[1402]	240	USE progress_bar, &
	241	ONLY: finish_progress_bar, output_progress_bar
	242
[1320]	243	USE prognostic_equations_mod, &
	244	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
	245	prognostic_equations_vector
	246
[1496]	247	USE radiation_model_mod, &
[1691]	248	ONLY: dt_radiation, force_radiation_call, radiation, &
	249	radiation_clearsky, radiation_rrtmg, radiation_scheme, &
	250	skip_time_do_radiation, time_radiation
[1496]	251
[1320]	252	USE statistics, &
[1365]	253	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
[1320]	254
[1691]	255	USE surface_layer_fluxes_mod, &
	256	ONLY: surface_layer_fluxes
	257
[1320]	258	USE user_actions_mod, &
	259	ONLY: user_actions
	260
[1]	261	IMPLICIT NONE
	262
[1682]	263	CHARACTER (LEN=9) :: time_to_string !<
[1]	264
[1682]	265	INTEGER(iwp) :: netcdf_data_format_save !<
[1320]	266
[1]	267	!
	268	!-- At the beginning of a simulation determine the time step as well as
	269	!-- determine and print out the run control parameters
[1342]	270	IF ( simulated_time == 0.0_wp ) CALL timestep
[667]	271
[1]	272	CALL run_control
	273
[667]	274
[108]	275	!
	276	!-- Data exchange between coupled models in case that a call has been omitted
	277	!-- at the end of the previous run of a job chain.
[291]	278	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[108]	279	!
	280	!-- In case of model termination initiated by the local model the coupler
	281	!-- must not be called because this would again cause an MPI hang.
	282	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
	283	CALL surface_coupler
	284	time_coupling = time_coupling - dt_coupling
	285	ENDDO
[1342]	286	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
[348]	287	THEN
	288	time_coupling = time_since_reference_point
	289	ENDIF
[108]	290	ENDIF
	291
	292
[1]	293	#if defined( __dvrp_graphics )
	294	!
	295	!-- Time measurement with dvrp software
	296	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	297	#endif
	298
[1402]	299	CALL location_message( 'start with time-stepping', .TRUE. )
[1]	300	!
	301	!-- Start of the time loop
	302	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
	303	.NOT. terminate_run )
	304
	305	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
[1221]	306
[1]	307	!
	308	!-- Determine size of next time step
[1342]	309	IF ( simulated_time /= 0.0_wp ) THEN
[1221]	310	CALL timestep
	311	ENDIF
	312
[1]	313	!
[1241]	314	!-- Determine ug, vg and w_subs in dependence on data from external file
	315	!-- LSF_DATA
[1365]	316	IF ( large_scale_forcing .AND. lsf_vert ) THEN
[1241]	317	CALL ls_forcing_vert ( simulated_time )
[1365]	318	sums_ls_l = 0.0_wp
[1241]	319	ENDIF
	320
	321	!
[1380]	322	!-- Set pt_init and q_init to the current profiles taken from
	323	!-- NUDGING_DATA
	324	IF ( nudging ) THEN
	325	CALL nudge_ref ( simulated_time )
	326	!
	327	!-- Store temperature gradient at the top boundary for possible Neumann
	328	!-- boundary condition
	329	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
	330	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
	331	ENDIF
	332
	333	!
[1]	334	!-- Execute the user-defined actions
	335	CALL user_actions( 'before_timestep' )
	336
	337	!
	338	!-- Start of intermediate step loop
	339	intermediate_timestep_count = 0
	340	DO WHILE ( intermediate_timestep_count < &
	341	intermediate_timestep_count_max )
	342
	343	intermediate_timestep_count = intermediate_timestep_count + 1
	344
	345	!
	346	!-- Set the steering factors for the prognostic equations which depend
	347	!-- on the timestep scheme
	348	CALL timestep_scheme_steering
	349
	350	!
[1128]	351	!-- Calculate those variables needed in the tendency terms which need
	352	!-- global communication
[1179]	353	IF ( .NOT. use_single_reference_value .AND. &
	354	.NOT. use_initial_profile_as_reference ) THEN
	355	!
	356	!-- Horizontally averaged profiles to be used as reference state in
	357	!-- buoyancy terms (WARNING: only the respective last call of
	358	!-- calc_mean_profile defines the reference state!)
[1365]	359	IF ( .NOT. neutral ) THEN
	360	CALL calc_mean_profile( pt, 4 )
	361	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
	362	ENDIF
	363	IF ( ocean ) THEN
	364	CALL calc_mean_profile( rho, 64 )
	365	ref_state(:) = hom(:,1,64,0)
	366	ENDIF
	367	IF ( humidity ) THEN
	368	CALL calc_mean_profile( vpt, 44 )
	369	ref_state(:) = hom(:,1,44,0)
	370	ENDIF
	371
[1179]	372	ENDIF
	373
[1128]	374	IF ( .NOT. constant_diffusion ) CALL production_e_init
	375	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
	376	intermediate_timestep_count == 1 ) CALL ws_statistics
[1365]	377	!
	378	!-- In case of nudging calculate current nudging time scale and horizontal
[1380]	379	!-- means of u, v, pt and q
[1365]	380	IF ( nudging ) THEN
	381	CALL calc_tnudge( simulated_time )
	382	CALL calc_mean_profile( u, 1 )
	383	CALL calc_mean_profile( v, 2 )
	384	CALL calc_mean_profile( pt, 4 )
	385	CALL calc_mean_profile( q, 41 )
	386	ENDIF
[1128]	387
	388	!
[1]	389	!-- Solve the prognostic equations. A fast cache optimized version with
	390	!-- only one single loop is used in case of Piascek-Williams advection
	391	!-- scheme. NEC vector machines use a different version, because
	392	!-- in the other versions a good vectorization is prohibited due to
	393	!-- inlining problems.
[1019]	394	IF ( loop_optimization == 'cache' ) THEN
	395	CALL prognostic_equations_cache
	396	ELSEIF ( loop_optimization == 'vector' ) THEN
[63]	397	CALL prognostic_equations_vector
[1015]	398	ELSEIF ( loop_optimization == 'acc' ) THEN
[1171]	399	i_left = nxl; i_right = nxr
	400	j_south = nys; j_north = nyn
	401	CALL prognostic_equations_acc
	402
	403	! i_left = nxl; i_right = nxl+nbgp-1
[1128]	404	! j_south = nys; j_north = nyn
	405	! CALL prognostic_equations_acc
[1171]	406	! i_left = nxr-nbgp+1; i_right = nxr
	407	! j_south = nys; j_north = nyn
	408	! CALL prognostic_equations_acc
[1128]	409
	410	!
	411	!-- Exchange of ghost points (lateral boundary conditions)
	412	IF ( background_communication ) THEN
	413
	414	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
	415
	416	send_receive = 'lr'
	417	sendrecv_in_background = .TRUE.
	418	req = 0
	419	req_count = 0
	420
	421	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	422	on_device = .TRUE. ! to be removed after complete porting
	423	ELSE ! of ghost point exchange
	424	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	425	ENDIF
	426
	427	CALL exchange_horiz( u_p, nbgp )
	428	CALL exchange_horiz( v_p, nbgp )
	429	CALL exchange_horiz( w_p, nbgp )
	430	CALL exchange_horiz( pt_p, nbgp )
	431	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	432	IF ( ocean ) THEN
	433	CALL exchange_horiz( sa_p, nbgp )
	434	CALL exchange_horiz( rho, nbgp )
	435	CALL exchange_horiz( prho, nbgp )
	436	ENDIF
	437	IF (humidity .OR. passive_scalar) THEN
	438	CALL exchange_horiz( q_p, nbgp )
	439	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	440	CALL exchange_horiz( qr_p, nbgp )
	441	CALL exchange_horiz( nr_p, nbgp )
	442	ENDIF
	443	ENDIF
	444	IF ( cloud_droplets ) THEN
	445	CALL exchange_horiz( ql, nbgp )
	446	CALL exchange_horiz( ql_c, nbgp )
	447	CALL exchange_horiz( ql_v, nbgp )
	448	CALL exchange_horiz( ql_vp, nbgp )
	449	ENDIF
[1671]	450	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	451	THEN
	452	CALL exchange_horiz( diss, nbgp )
	453	ENDIF
[1128]	454
	455	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	456	on_device = .FALSE. ! to be removed after complete porting
	457	ELSE ! of ghost point exchange
	458	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	459	ENDIF
	460
	461	sendrecv_in_background = .FALSE.
	462
	463	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
	464
	465	ENDIF
	466
[1171]	467	! i_left = nxl+nbgp; i_right = nxr-nbgp
	468	! j_south = nys; j_north = nys+nbgp-1
	469	! CALL prognostic_equations_acc
	470	! i_left = nxl+nbgp; i_right = nxr-nbgp
	471	! j_south = nyn-nbgp+1; j_north = nyn
	472	! CALL prognostic_equations_acc
[1128]	473
	474	IF ( background_communication ) THEN
	475	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
	476	#if defined( __parallel )
	477	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	478	#endif
	479	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
	480
	481	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
	482
	483	send_receive = 'ns'
	484	sendrecv_in_background = .TRUE.
	485	req = 0
	486	req_count = 0
	487
	488	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	489	on_device = .TRUE. ! to be removed after complete porting
	490	ELSE ! of ghost point exchange
	491	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	492	ENDIF
	493
	494	CALL exchange_horiz( u_p, nbgp )
	495	CALL exchange_horiz( v_p, nbgp )
	496	CALL exchange_horiz( w_p, nbgp )
	497	CALL exchange_horiz( pt_p, nbgp )
	498	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	499	IF ( ocean ) THEN
	500	CALL exchange_horiz( sa_p, nbgp )
	501	CALL exchange_horiz( rho, nbgp )
	502	CALL exchange_horiz( prho, nbgp )
	503	ENDIF
	504	IF (humidity .OR. passive_scalar) THEN
	505	CALL exchange_horiz( q_p, nbgp )
	506	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	507	CALL exchange_horiz( qr_p, nbgp )
	508	CALL exchange_horiz( nr_p, nbgp )
	509	ENDIF
	510	ENDIF
	511	IF ( cloud_droplets ) THEN
	512	CALL exchange_horiz( ql, nbgp )
	513	CALL exchange_horiz( ql_c, nbgp )
	514	CALL exchange_horiz( ql_v, nbgp )
	515	CALL exchange_horiz( ql_vp, nbgp )
	516	ENDIF
[1671]	517	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	518	THEN
	519	CALL exchange_horiz( diss, nbgp )
	520	ENDIF
[1128]	521
	522	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	523	on_device = .FALSE. ! to be removed after complete porting
	524	ELSE ! of ghost point exchange
	525	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	526	ENDIF
	527
	528	sendrecv_in_background = .FALSE.
	529
	530	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	531
	532	ENDIF
	533
[1171]	534	! i_left = nxl+nbgp; i_right = nxr-nbgp
	535	! j_south = nys+nbgp; j_north = nyn-nbgp
	536	! CALL prognostic_equations_acc
[1128]	537
	538	IF ( background_communication ) THEN
	539	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
	540	#if defined( __parallel )
	541	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	542	#endif
	543	send_receive = 'al'
	544	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
	545	ENDIF
	546
[1]	547	ENDIF
	548
	549	!
[849]	550	!-- Particle transport/physics with the Lagrangian particle model
	551	!-- (only once during intermediate steps, because it uses an Euler-step)
[1128]	552	!-- ### particle model should be moved before prognostic_equations, in order
	553	!-- to regard droplet interactions directly
[63]	554	IF ( particle_advection .AND. &
	555	simulated_time >= particle_advection_start .AND. &
[1]	556	intermediate_timestep_count == 1 ) THEN
[849]	557	CALL lpm
	558	first_call_lpm = .FALSE.
[1]	559	ENDIF
	560
	561	!
	562	!-- Interaction of droplets with temperature and specific humidity.
	563	!-- Droplet condensation and evaporation is calculated within
	564	!-- advec_particles.
	565	IF ( cloud_droplets .AND. &
	566	intermediate_timestep_count == intermediate_timestep_count_max )&
	567	THEN
	568	CALL interaction_droplets_ptq
	569	ENDIF
	570
	571	!
	572	!-- Exchange of ghost points (lateral boundary conditions)
[1128]	573	IF ( .NOT. background_communication ) THEN
[1113]	574
[1128]	575	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
[1113]	576
[1128]	577	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	578	on_device = .TRUE. ! to be removed after complete porting
	579	ELSE ! of ghost point exchange
	580	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
[1053]	581	ENDIF
[1]	582
[1128]	583	CALL exchange_horiz( u_p, nbgp )
	584	CALL exchange_horiz( v_p, nbgp )
	585	CALL exchange_horiz( w_p, nbgp )
	586	CALL exchange_horiz( pt_p, nbgp )
	587	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	588	IF ( ocean ) THEN
	589	CALL exchange_horiz( sa_p, nbgp )
	590	CALL exchange_horiz( rho, nbgp )
	591	CALL exchange_horiz( prho, nbgp )
	592	ENDIF
	593	IF (humidity .OR. passive_scalar) THEN
	594	CALL exchange_horiz( q_p, nbgp )
[1179]	595	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	596	precipitation ) THEN
[1128]	597	CALL exchange_horiz( qr_p, nbgp )
	598	CALL exchange_horiz( nr_p, nbgp )
	599	ENDIF
	600	ENDIF
	601	IF ( cloud_droplets ) THEN
	602	CALL exchange_horiz( ql, nbgp )
	603	CALL exchange_horiz( ql_c, nbgp )
	604	CALL exchange_horiz( ql_v, nbgp )
	605	CALL exchange_horiz( ql_vp, nbgp )
	606	ENDIF
[1671]	607	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	608	THEN
	609	CALL exchange_horiz( diss, nbgp )
	610	ENDIF
[1128]	611
	612	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	613	on_device = .FALSE. ! to be removed after complete porting
	614	ELSE ! of ghost point exchange
	615	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	616	ENDIF
	617
	618	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	619
[1113]	620	ENDIF
	621
[1]	622	!
	623	!-- Boundary conditions for the prognostic quantities (except of the
	624	!-- velocities at the outflow in case of a non-cyclic lateral wall)
[1113]	625	CALL boundary_conds
[1]	626
	627	!
[73]	628	!-- Swap the time levels in preparation for the next time step.
	629	CALL swap_timelevel
	630
	631	!
[1]	632	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
	633	!-- when a sloping surface is used
	634	IF ( sloping_surface ) THEN
[707]	635	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
	636	pt_slope_offset
	637	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
	638	pt_slope_offset
[1]	639	ENDIF
	640
	641	!
[151]	642	!-- Impose a turbulent inflow using the recycling method
	643	IF ( turbulent_inflow ) CALL inflow_turbulence
	644
	645	!
[1]	646	!-- Impose a random perturbation on the horizontal velocity field
[106]	647	IF ( create_disturbances .AND. &
	648	( call_psolver_at_all_substeps .AND. &
[1]	649	intermediate_timestep_count == intermediate_timestep_count_max )&
[106]	650	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
	651	intermediate_timestep_count == 1 ) ) &
[1]	652	THEN
	653	time_disturb = time_disturb + dt_3d
	654	IF ( time_disturb >= dt_disturb ) THEN
[1111]	655	!$acc update host( u, v )
[1113]	656	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
[1736]	657	IF ( disturbance_energy_limit /= 0.0_wp .AND. &
	658	hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
[75]	659	CALL disturb_field( nzb_u_inner, tend, u )
	660	CALL disturb_field( nzb_v_inner, tend, v )
[707]	661	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
[1]	662	!
	663	!-- Runs with a non-cyclic lateral wall need perturbations
	664	!-- near the inflow throughout the whole simulation
	665	dist_range = 1
[75]	666	CALL disturb_field( nzb_u_inner, tend, u )
	667	CALL disturb_field( nzb_v_inner, tend, v )
[1]	668	dist_range = 0
	669	ENDIF
[1113]	670	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
[1111]	671	!$acc update device( u, v )
[1]	672	time_disturb = time_disturb - dt_disturb
	673	ENDIF
	674	ENDIF
	675
	676	!
	677	!-- Reduce the velocity divergence via the equation for perturbation
	678	!-- pressure.
[106]	679	IF ( intermediate_timestep_count == 1 .OR. &
	680	call_psolver_at_all_substeps ) THEN
[1]	681	CALL pres
	682	ENDIF
	683
	684	!
	685	!-- If required, compute liquid water content
[1015]	686	IF ( cloud_physics ) THEN
	687	CALL calc_liquid_water_content
	688	!$acc update device( ql )
	689	ENDIF
[1115]	690	!
	691	!-- If required, compute virtual potential temperature
	692	IF ( humidity ) THEN
	693	CALL compute_vpt
	694	!$acc update device( vpt )
	695	ENDIF
[1585]	696
[1]	697	!
	698	!-- Compute the diffusion quantities
	699	IF ( .NOT. constant_diffusion ) THEN
	700
	701	!
[1276]	702	!-- Determine surface fluxes shf and qsws and surface values
	703	!-- pt_surface and q_surface in dependence on data from external
	704	!-- file LSF_DATA respectively
	705	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
	706	intermediate_timestep_count == intermediate_timestep_count_max )&
	707	THEN
	708	CALL ls_forcing_surf ( simulated_time )
	709	ENDIF
	710
	711	!
[1691]	712	!-- First the vertical fluxes in the surface (constant flux) layer are computed
	713	IF ( constant_flux_layer ) THEN
	714	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'start' )
	715	CALL surface_layer_fluxes
	716	CALL cpu_log( log_point(19), 'surface_layer_fluxes', 'stop' )
[1]	717	ENDIF
[1241]	718
[1]	719	!
[1691]	720	!-- If required, solve the energy balance for the surface and run soil
	721	!-- model
	722	IF ( land_surface .AND. simulated_time > skip_time_do_lsm) THEN
	723
	724	CALL cpu_log( log_point(54), 'land_surface', 'start' )
	725	CALL lsm_energy_balance
	726	CALL lsm_soil_model
	727	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
	728	ENDIF
	729	!
[1]	730	!-- Compute the diffusion coefficients
	731	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
[75]	732	IF ( .NOT. humidity ) THEN
[97]	733	IF ( ocean ) THEN
[388]	734	CALL diffusivities( prho, prho_reference )
[97]	735	ELSE
	736	CALL diffusivities( pt, pt_reference )
	737	ENDIF
[1]	738	ELSE
[97]	739	CALL diffusivities( vpt, pt_reference )
[1]	740	ENDIF
	741	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
	742
	743	ENDIF
	744
[1691]	745	!
	746	!-- If required, calculate radiative fluxes and heating rates
	747	IF ( radiation .AND. intermediate_timestep_count &
	748	== intermediate_timestep_count_max .AND. simulated_time > &
	749	skip_time_do_radiation ) THEN
	750
	751	time_radiation = time_radiation + dt_3d
	752
	753	IF ( time_radiation >= dt_radiation .OR. force_radiation_call ) &
	754	THEN
	755
	756	CALL cpu_log( log_point(50), 'radiation', 'start' )
	757
	758	IF ( .NOT. force_radiation_call ) THEN
	759	time_radiation = time_radiation - dt_radiation
	760	ELSE
	761	WRITE(9,*) "Unscheduled radiation call at ", simulated_time
	762	CALL LOCAL_FLUSH ( 9 )
	763	ENDIF
	764
	765	IF ( radiation_scheme == 'clear-sky' ) THEN
	766	CALL radiation_clearsky
	767	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
	768	CALL radiation_rrtmg
	769	ENDIF
	770
	771	CALL cpu_log( log_point(50), 'radiation', 'stop' )
	772	ENDIF
	773	ENDIF
	774
[1]	775	ENDDO ! Intermediate step loop
	776
	777	!
	778	!-- Increase simulation time and output times
[1111]	779	nr_timesteps_this_run = nr_timesteps_this_run + 1
[291]	780	current_timestep_number = current_timestep_number + 1
	781	simulated_time = simulated_time + dt_3d
	782	simulated_time_chr = time_to_string( simulated_time )
	783	time_since_reference_point = simulated_time - coupling_start_time
	784
[1]	785	IF ( simulated_time >= skip_time_data_output_av ) THEN
	786	time_do_av = time_do_av + dt_3d
	787	ENDIF
	788	IF ( simulated_time >= skip_time_do2d_xy ) THEN
	789	time_do2d_xy = time_do2d_xy + dt_3d
	790	ENDIF
	791	IF ( simulated_time >= skip_time_do2d_xz ) THEN
	792	time_do2d_xz = time_do2d_xz + dt_3d
	793	ENDIF
	794	IF ( simulated_time >= skip_time_do2d_yz ) THEN
	795	time_do2d_yz = time_do2d_yz + dt_3d
	796	ENDIF
	797	IF ( simulated_time >= skip_time_do3d ) THEN
	798	time_do3d = time_do3d + dt_3d
	799	ENDIF
[410]	800	DO mid = 1, masks
	801	IF ( simulated_time >= skip_time_domask(mid) ) THEN
	802	time_domask(mid)= time_domask(mid) + dt_3d
	803	ENDIF
	804	ENDDO
[1]	805	time_dvrp = time_dvrp + dt_3d
	806	IF ( simulated_time >= skip_time_dosp ) THEN
	807	time_dosp = time_dosp + dt_3d
	808	ENDIF
	809	time_dots = time_dots + dt_3d
[849]	810	IF ( .NOT. first_call_lpm ) THEN
[1]	811	time_dopts = time_dopts + dt_3d
	812	ENDIF
	813	IF ( simulated_time >= skip_time_dopr ) THEN
	814	time_dopr = time_dopr + dt_3d
	815	ENDIF
	816	time_dopr_listing = time_dopr_listing + dt_3d
	817	time_run_control = time_run_control + dt_3d
	818
	819	!
[102]	820	!-- Data exchange between coupled models
[291]	821	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[102]	822	time_coupling = time_coupling + dt_3d
[343]	823
[108]	824	!
	825	!-- In case of model termination initiated by the local model
	826	!-- (terminate_coupled > 0), the coupler must be skipped because it would
	827	!-- cause an MPI intercomminucation hang.
	828	!-- If necessary, the coupler will be called at the beginning of the
	829	!-- next restart run.
	830	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
[102]	831	CALL surface_coupler
	832	time_coupling = time_coupling - dt_coupling
	833	ENDDO
	834	ENDIF
	835
	836	!
[46]	837	!-- Execute user-defined actions
	838	CALL user_actions( 'after_integration' )
	839
	840	!
[1]	841	!-- If Galilei transformation is used, determine the distance that the
	842	!-- model has moved so far
	843	IF ( galilei_transformation ) THEN
	844	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
	845	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
	846	ENDIF
	847
	848	!
	849	!-- Check, if restart is necessary (because cpu-time is expiring or
	850	!-- because it is forced by user) and set stop flag
[108]	851	!-- This call is skipped if the remote model has already initiated a restart.
	852	IF ( .NOT. terminate_run ) CALL check_for_restart
[1]	853
	854	!
	855	!-- Carry out statistical analysis and output at the requested output times.
	856	!-- The MOD function is used for calculating the output time counters (like
	857	!-- time_dopr) in order to regard a possible decrease of the output time
	858	!-- interval in case of restart runs
	859
	860	!
	861	!-- Set a flag indicating that so far no statistics have been created
	862	!-- for this time step
	863	flow_statistics_called = .FALSE.
	864
	865	!
	866	!-- If required, call flow_statistics for averaging in time
[1342]	867	IF ( averaging_interval_pr /= 0.0_wp .AND. &
[1]	868	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
	869	simulated_time >= skip_time_dopr ) THEN
	870	time_dopr_av = time_dopr_av + dt_3d
	871	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
	872	do_sum = .TRUE.
	873	time_dopr_av = MOD( time_dopr_av, &
	874	MAX( dt_averaging_input_pr, dt_3d ) )
	875	ENDIF
	876	ENDIF
	877	IF ( do_sum ) CALL flow_statistics
	878
	879	!
[410]	880	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
[1342]	881	IF ( averaging_interval /= 0.0_wp .AND. &
[1]	882	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
	883	simulated_time >= skip_time_data_output_av ) &
	884	THEN
	885	time_do_sla = time_do_sla + dt_3d
	886	IF ( time_do_sla >= dt_averaging_input ) THEN
	887	CALL sum_up_3d_data
	888	average_count_3d = average_count_3d + 1
	889	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
	890	ENDIF
	891	ENDIF
	892
	893	!
	894	!-- Calculate spectra for time averaging
[1342]	895	IF ( averaging_interval_sp /= 0.0_wp .AND. &
[1]	896	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
	897	simulated_time >= skip_time_dosp ) THEN
	898	time_dosp_av = time_dosp_av + dt_3d
	899	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
	900	CALL calc_spectra
	901	time_dosp_av = MOD( time_dosp_av, &
	902	MAX( dt_averaging_input_pr, dt_3d ) )
	903	ENDIF
	904	ENDIF
	905
	906	!
	907	!-- Computation and output of run control parameters.
[1001]	908	!-- This is also done whenever perturbations have been imposed
[1]	909	IF ( time_run_control >= dt_run_control .OR. &
[1001]	910	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
[1]	911	THEN
	912	CALL run_control
	913	IF ( time_run_control >= dt_run_control ) THEN
	914	time_run_control = MOD( time_run_control, &
	915	MAX( dt_run_control, dt_3d ) )
	916	ENDIF
	917	ENDIF
	918
	919	!
	920	!-- Profile output (ASCII) on file
	921	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
	922	CALL print_1d
	923	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
	924	dt_3d ) )
	925	ENDIF
	926
	927	!
	928	!-- Graphic output for PROFIL
	929	IF ( time_dopr >= dt_dopr ) THEN
	930	IF ( dopr_n /= 0 ) CALL data_output_profiles
	931	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
[1342]	932	time_dopr_av = 0.0_wp ! due to averaging (see above)
[1]	933	ENDIF
	934
	935	!
	936	!-- Graphic output for time series
	937	IF ( time_dots >= dt_dots ) THEN
[48]	938	CALL data_output_tseries
[1]	939	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
	940	ENDIF
	941
	942	!
	943	!-- Output of spectra (formatted for use with PROFIL), in case of no
	944	!-- time averaging, spectra has to be calculated before
	945	IF ( time_dosp >= dt_dosp ) THEN
	946	IF ( average_count_sp == 0 ) CALL calc_spectra
	947	CALL data_output_spectra
	948	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
	949	ENDIF
	950
	951	!
	952	!-- 2d-data output (cross-sections)
	953	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
	954	CALL data_output_2d( 'xy', 0 )
	955	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
	956	ENDIF
	957	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
	958	CALL data_output_2d( 'xz', 0 )
	959	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
	960	ENDIF
	961	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
	962	CALL data_output_2d( 'yz', 0 )
	963	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
	964	ENDIF
	965
	966	!
	967	!-- 3d-data output (volume data)
	968	IF ( time_do3d >= dt_do3d ) THEN
	969	CALL data_output_3d( 0 )
	970	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
	971	ENDIF
	972
	973	!
[410]	974	!-- masked data output
[1308]	975	!-- Parallel netcdf output is not tested so far for masked data, hence
	976	!-- netcdf_data_format is switched back to non-paralell output.
	977	netcdf_data_format_save = netcdf_data_format
	978	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	979	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	980	DO mid = 1, masks
	981	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
	982	CALL data_output_mask( 0 )
	983	time_domask(mid) = MOD( time_domask(mid), &
	984	MAX( dt_domask(mid), dt_3d ) )
	985	ENDIF
	986	ENDDO
[1308]	987	netcdf_data_format = netcdf_data_format_save
[410]	988
	989	!
	990	!-- Output of time-averaged 2d/3d/masked data
[1]	991	IF ( time_do_av >= dt_data_output_av ) THEN
	992	CALL average_3d_data
	993	CALL data_output_2d( 'xy', 1 )
	994	CALL data_output_2d( 'xz', 1 )
	995	CALL data_output_2d( 'yz', 1 )
	996	CALL data_output_3d( 1 )
[1308]	997	!-- Parallel netcdf output is not tested so far for masked data, hence
	998	!-- netcdf_data_format is switched back to non-paralell output.
	999	netcdf_data_format_save = netcdf_data_format
	1000	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	1001	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	1002	DO mid = 1, masks
	1003	CALL data_output_mask( 1 )
	1004	ENDDO
[1308]	1005	netcdf_data_format = netcdf_data_format_save
[1]	1006	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
	1007	ENDIF
	1008
	1009	!
	1010	!-- Output of particle time series
[253]	1011	IF ( particle_advection ) THEN
	1012	IF ( time_dopts >= dt_dopts .OR. &
	1013	( simulated_time >= particle_advection_start .AND. &
[849]	1014	first_call_lpm ) ) THEN
[253]	1015	CALL data_output_ptseries
	1016	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
	1017	ENDIF
[1]	1018	ENDIF
	1019
	1020	!
	1021	!-- Output of dvrp-graphics (isosurface, particles, slicer)
	1022	#if defined( __dvrp_graphics )
	1023	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
	1024	#endif
	1025	IF ( time_dvrp >= dt_dvrp ) THEN
	1026	CALL data_output_dvrp
	1027	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
	1028	ENDIF
	1029	#if defined( __dvrp_graphics )
	1030	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	1031	#endif
	1032
	1033	!
	1034	!-- If required, set the heat flux for the next time step at a random value
	1035	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
	1036
	1037	!
	1038	!-- Execute user-defined actions
	1039	CALL user_actions( 'after_timestep' )
	1040
[1402]	1041	!
	1042	!-- Output elapsed simulated time in form of a progress bar on stdout
	1043	IF ( myid == 0 ) CALL output_progress_bar
	1044
[1]	1045	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
	1046
[667]	1047
[1]	1048	ENDDO ! time loop
	1049
[1402]	1050	IF ( myid == 0 ) CALL finish_progress_bar
	1051
[1]	1052	#if defined( __dvrp_graphics )
	1053	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
	1054	#endif
	1055
[1402]	1056	CALL location_message( 'finished time-stepping', .TRUE. )
[1384]	1057
[1]	1058	END SUBROUTINE time_integration

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