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source: palm/trunk/SOURCE/time_integration.f90 @ 1684

Last change on this file since 1684 was 1683, checked in by knoop, 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	!
[1310]	16	! Copyright 1997-2014 Leibniz Universitaet Hannover
[1036]	17	!--------------------------------------------------------------------------------!
	18	!
[484]	19	! Current revisions:
[1092]	20	! ------------------
[1366]	21	!
[1683]	22	!
[1366]	23	! Former revisions:
	24	! -----------------
	25	! $Id: time_integration.f90 1683 2015-10-07 23:57:51Z knoop $
	26	!
[1683]	27	! 1682 2015-10-07 23:56:08Z knoop
	28	! Code annotations made doxygen readable
	29	!
[1672]	30	! 1671 2015-09-25 03:29:37Z raasch
	31	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
	32	! for particles
	33	!
[1586]	34	! 1585 2015-04-30 07:05:52Z maronga
	35	! Moved call of radiation scheme. Added support for RRTM
	36	!
[1552]	37	! 1551 2015-03-03 14:18:16Z maronga
	38	! Added interface for different radiation schemes.
	39	!
[1497]	40	! 1496 2014-12-02 17:25:50Z maronga
	41	! Added calls for the land surface model and radiation scheme
	42	!
[1403]	43	! 1402 2014-05-09 14:25:13Z raasch
	44	! location messages modified
	45	!
[1385]	46	! 1384 2014-05-02 14:31:06Z raasch
	47	! location messages added
	48	!
[1381]	49	! 1380 2014-04-28 12:40:45Z heinze
	50	! CALL of nudge_ref added
	51	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
	52	!
[1366]	53	! 1365 2014-04-22 15:03:56Z boeske
[1365]	54	! Reset sums_ls_l to zero at each timestep
	55	! +sums_ls_l
	56	! Calculation of reference state (previously in subroutine calc_mean_profile)
	57
[1343]	58	! 1342 2014-03-26 17:04:47Z kanani
	59	! REAL constants defined as wp-kind
	60	!
[1321]	61	! 1320 2014-03-20 08:40:49Z raasch
[1320]	62	! ONLY-attribute added to USE-statements,
	63	! kind-parameters added to all INTEGER and REAL declaration statements,
	64	! kinds are defined in new module kinds,
	65	! old module precision_kind is removed,
	66	! revision history before 2012 removed,
	67	! comment fields (!:) to be used for variable explanations added to
	68	! all variable declaration statements
[1319]	69	! 1318 2014-03-17 13:35:16Z raasch
	70	! module interfaces removed
	71	!
[1309]	72	! 1308 2014-03-13 14:58:42Z fricke
	73	! +netcdf_data_format_save
	74	! For masked data, parallel netcdf output is not tested so far, hence
	75	! netcdf_data_format is switched back to non-paralell output.
	76	!
[1277]	77	! 1276 2014-01-15 13:40:41Z heinze
	78	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
	79	!
[1258]	80	! 1257 2013-11-08 15:18:40Z raasch
	81	! acc-update-host directive for timestep removed
	82	!
[1242]	83	! 1241 2013-10-30 11:36:58Z heinze
	84	! Generalize calc_mean_profile for wider use
	85	! Determine shf and qsws in dependence on data from LSF_DATA
	86	! Determine ug and vg in dependence on data from LSF_DATA
[1222]	87	! 1221 2013-09-10 08:59:13Z raasch
	88	! host update of arrays before timestep is called
	89	!
[1182]	90	! 1179 2013-06-14 05:57:58Z raasch
	91	! mean profiles for reference state are only calculated if required,
	92	! small bugfix for background communication
	93	!
[1172]	94	! 1171 2013-05-30 11:27:45Z raasch
	95	! split of prognostic_equations deactivated (comment lines), for the time being
	96	!
[1132]	97	! 1128 2013-04-12 06:19:32Z raasch
[1128]	98	! asynchronous transfer of ghost point data realized for acc-optimized version:
	99	! prognostic_equations are first called two times for those points required for
	100	! the left-right and north-south exchange, respectively, and then for the
	101	! remaining points,
	102	! those parts requiring global communication moved from prognostic_equations to
	103	! here
[392]	104	!
[1116]	105	! 1115 2013-03-26 18:16:16Z hoffmann
	106	! calculation of qr and nr is restricted to precipitation
	107	!
[1114]	108	! 1113 2013-03-10 02:48:14Z raasch
	109	! GPU-porting of boundary conditions,
	110	! openACC directives updated
	111	! formal parameter removed from routine boundary_conds
	112	!
[1112]	113	! 1111 2013-03-08 23:54:10Z raasch
	114	! +internal timestep counter for cpu statistics added,
	115	! openACC directives updated
	116	!
[1093]	117	! 1092 2013-02-02 11:24:22Z raasch
	118	! unused variables removed
	119	!
[1066]	120	! 1065 2012-11-22 17:42:36Z hoffmann
	121	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
	122	!
[1054]	123	! 1053 2012-11-13 17:11:03Z hoffmann
	124	! exchange of ghost points for nr, qr added
	125	!
[1037]	126	! 1036 2012-10-22 13:43:42Z raasch
	127	! code put under GPL (PALM 3.9)
	128	!
[1020]	129	! 1019 2012-09-28 06:46:45Z raasch
	130	! non-optimized version of prognostic_equations removed
	131	!
[1017]	132	! 1015 2012-09-27 09:23:24Z raasch
	133	! +call of prognostic_equations_acc
	134	!
[1002]	135	! 1001 2012-09-13 14:08:46Z raasch
	136	! all actions concerning leapfrog- and upstream-spline-scheme removed
	137	!
[850]	138	! 849 2012-03-15 10:35:09Z raasch
	139	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
	140	!
[826]	141	! 825 2012-02-19 03:03:44Z raasch
	142	! wang_collision_kernel renamed wang_kernel
	143	!
[1]	144	! Revision 1.1 1997/08/11 06:19:04 raasch
	145	! Initial revision
	146	!
	147	!
	148	! Description:
	149	! ------------
[1682]	150	!> Integration in time of the model equations, statistical analysis and graphic
	151	!> output
[1]	152	!------------------------------------------------------------------------------!
[1682]	153	SUBROUTINE time_integration
	154
[1]	155
[1320]	156	USE advec_ws, &
	157	ONLY: ws_statistics
	158
	159	USE arrays_3d, &
[1380]	160	ONLY: diss, dzu, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, ql, &
	161	ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, u, &
	162	u_p, v, vpt, v_p, w_p
[1320]	163
[1365]	164	USE calc_mean_profile_mod, &
[1320]	165	ONLY: calc_mean_profile
	166
	167	USE control_parameters, &
	168	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
	169	average_count_sp, averaging_interval, averaging_interval_pr, &
[1380]	170	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
	171	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
	172	cloud_physics, constant_heatflux, create_disturbances, dopr_n, &
[1320]	173	constant_diffusion, coupling_mode, coupling_start_time, &
	174	current_timestep_number, disturbance_created, &
	175	disturbance_energy_limit, dist_range, do_sum, dt_3d, &
	176	dt_averaging_input, dt_averaging_input_pr, dt_coupling, &
	177	dt_data_output_av, dt_disturb, dt_do2d_xy, dt_do2d_xz, &
	178	dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
	179	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
	180	end_time, first_call_lpm, galilei_transformation, humidity, &
	181	icloud_scheme, intermediate_timestep_count, &
	182	intermediate_timestep_count_max, large_scale_forcing, &
	183	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
[1365]	184	netcdf_data_format, neutral, nr_timesteps_this_run, nudging, &
	185	ocean, on_device, passive_scalar, prandtl_layer, precipitation, &
[1320]	186	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
	187	run_coupled, simulated_time, simulated_time_chr, &
	188	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
	189	skip_time_do3d, skip_time_domask, skip_time_dopr, &
	190	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
	191	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
	192	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
	193	time_do3d, time_domask, time_dopr, time_dopr_av, &
	194	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
	195	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
[1496]	196	time_run_control, time_since_reference_point, &
	197	turbulence, &
[1320]	198	turbulent_inflow, use_initial_profile_as_reference, &
	199	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
	200	ws_scheme_sca
	201
	202	USE cpulog, &
	203	ONLY: cpu_log, log_point, log_point_s
	204
	205	USE indices, &
	206	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
[1380]	207	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
[1320]	208
	209	USE interaction_droplets_ptq_mod, &
	210	ONLY: interaction_droplets_ptq
	211
	212	USE kinds
	213
[1496]	214	USE land_surface_model_mod, &
	215	ONLY: land_surface, lsm_energy_balance, lsm_soil_model
	216
[1320]	217	USE ls_forcing_mod, &
	218	ONLY: ls_forcing_surf, ls_forcing_vert
	219
[1365]	220	USE nudge_mod, &
[1380]	221	ONLY: calc_tnudge, nudge_ref
[1365]	222
[1320]	223	USE particle_attributes, &
[1671]	224	ONLY: particle_advection, particle_advection_start, &
	225	use_sgs_for_particles, wang_kernel
[1320]	226
[1]	227	USE pegrid
	228
[1320]	229	USE production_e_mod, &
	230	ONLY: production_e_init
	231
[1402]	232	USE progress_bar, &
	233	ONLY: finish_progress_bar, output_progress_bar
	234
[1320]	235	USE prognostic_equations_mod, &
	236	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
	237	prognostic_equations_vector
	238
[1496]	239	USE radiation_model_mod, &
[1585]	240	ONLY: dt_radiation, radiation, radiation_clearsky, &
	241	radiation_rrtmg, radiation_scheme, time_radiation
[1496]	242
[1320]	243	USE statistics, &
[1365]	244	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
[1320]	245
	246	USE user_actions_mod, &
	247	ONLY: user_actions
	248
[1]	249	IMPLICIT NONE
	250
[1682]	251	CHARACTER (LEN=9) :: time_to_string !<
[1]	252
[1682]	253	INTEGER(iwp) :: netcdf_data_format_save !<
[1320]	254
[1]	255	!
	256	!-- At the beginning of a simulation determine the time step as well as
	257	!-- determine and print out the run control parameters
[1342]	258	IF ( simulated_time == 0.0_wp ) CALL timestep
[667]	259
[1]	260	CALL run_control
	261
[667]	262
[108]	263	!
	264	!-- Data exchange between coupled models in case that a call has been omitted
	265	!-- at the end of the previous run of a job chain.
[291]	266	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[108]	267	!
	268	!-- In case of model termination initiated by the local model the coupler
	269	!-- must not be called because this would again cause an MPI hang.
	270	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
	271	CALL surface_coupler
	272	time_coupling = time_coupling - dt_coupling
	273	ENDDO
[1342]	274	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
[348]	275	THEN
	276	time_coupling = time_since_reference_point
	277	ENDIF
[108]	278	ENDIF
	279
	280
[1]	281	#if defined( __dvrp_graphics )
	282	!
	283	!-- Time measurement with dvrp software
	284	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	285	#endif
	286
[1402]	287	CALL location_message( 'start with time-stepping', .TRUE. )
[1]	288	!
	289	!-- Start of the time loop
	290	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
	291	.NOT. terminate_run )
	292
	293	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
[1221]	294
[1]	295	!
	296	!-- Determine size of next time step
[1342]	297	IF ( simulated_time /= 0.0_wp ) THEN
[1221]	298	CALL timestep
	299	ENDIF
	300
[1]	301	!
[1241]	302	!-- Determine ug, vg and w_subs in dependence on data from external file
	303	!-- LSF_DATA
[1365]	304	IF ( large_scale_forcing .AND. lsf_vert ) THEN
[1241]	305	CALL ls_forcing_vert ( simulated_time )
[1365]	306	sums_ls_l = 0.0_wp
[1241]	307	ENDIF
	308
	309	!
[1380]	310	!-- Set pt_init and q_init to the current profiles taken from
	311	!-- NUDGING_DATA
	312	IF ( nudging ) THEN
	313	CALL nudge_ref ( simulated_time )
	314	!
	315	!-- Store temperature gradient at the top boundary for possible Neumann
	316	!-- boundary condition
	317	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
	318	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
	319	ENDIF
	320
	321	!
[1]	322	!-- Execute the user-defined actions
	323	CALL user_actions( 'before_timestep' )
	324
	325	!
	326	!-- Start of intermediate step loop
	327	intermediate_timestep_count = 0
	328	DO WHILE ( intermediate_timestep_count < &
	329	intermediate_timestep_count_max )
	330
	331	intermediate_timestep_count = intermediate_timestep_count + 1
	332
	333	!
	334	!-- Set the steering factors for the prognostic equations which depend
	335	!-- on the timestep scheme
	336	CALL timestep_scheme_steering
	337
	338	!
[1128]	339	!-- Calculate those variables needed in the tendency terms which need
	340	!-- global communication
[1179]	341	IF ( .NOT. use_single_reference_value .AND. &
	342	.NOT. use_initial_profile_as_reference ) THEN
	343	!
	344	!-- Horizontally averaged profiles to be used as reference state in
	345	!-- buoyancy terms (WARNING: only the respective last call of
	346	!-- calc_mean_profile defines the reference state!)
[1365]	347	IF ( .NOT. neutral ) THEN
	348	CALL calc_mean_profile( pt, 4 )
	349	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
	350	ENDIF
	351	IF ( ocean ) THEN
	352	CALL calc_mean_profile( rho, 64 )
	353	ref_state(:) = hom(:,1,64,0)
	354	ENDIF
	355	IF ( humidity ) THEN
	356	CALL calc_mean_profile( vpt, 44 )
	357	ref_state(:) = hom(:,1,44,0)
	358	ENDIF
	359
[1179]	360	ENDIF
	361
[1128]	362	IF ( .NOT. constant_diffusion ) CALL production_e_init
	363	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
	364	intermediate_timestep_count == 1 ) CALL ws_statistics
[1365]	365	!
	366	!-- In case of nudging calculate current nudging time scale and horizontal
[1380]	367	!-- means of u, v, pt and q
[1365]	368	IF ( nudging ) THEN
	369	CALL calc_tnudge( simulated_time )
	370	CALL calc_mean_profile( u, 1 )
	371	CALL calc_mean_profile( v, 2 )
	372	CALL calc_mean_profile( pt, 4 )
	373	CALL calc_mean_profile( q, 41 )
	374	ENDIF
[1128]	375
[1585]	376	IF ( radiation .AND. intermediate_timestep_count &
	377	== intermediate_timestep_count_max ) THEN
	378
	379	time_radiation = time_radiation + dt_3d
	380
	381	IF ( time_radiation >= dt_radiation ) THEN
	382
	383	CALL cpu_log( log_point(50), 'radiation', 'start' )
	384
	385	time_radiation = time_radiation - dt_radiation
	386	IF ( radiation_scheme == 'clear-sky' ) THEN
	387	CALL radiation_clearsky
	388	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
	389	CALL radiation_rrtmg
	390	ENDIF
	391
	392	CALL cpu_log( log_point(50), 'radiation', 'stop' )
	393	ENDIF
	394	ENDIF
[1128]	395	!
[1]	396	!-- Solve the prognostic equations. A fast cache optimized version with
	397	!-- only one single loop is used in case of Piascek-Williams advection
	398	!-- scheme. NEC vector machines use a different version, because
	399	!-- in the other versions a good vectorization is prohibited due to
	400	!-- inlining problems.
[1019]	401	IF ( loop_optimization == 'cache' ) THEN
	402	CALL prognostic_equations_cache
	403	ELSEIF ( loop_optimization == 'vector' ) THEN
[63]	404	CALL prognostic_equations_vector
[1015]	405	ELSEIF ( loop_optimization == 'acc' ) THEN
[1171]	406	i_left = nxl; i_right = nxr
	407	j_south = nys; j_north = nyn
	408	CALL prognostic_equations_acc
	409
	410	! i_left = nxl; i_right = nxl+nbgp-1
[1128]	411	! j_south = nys; j_north = nyn
	412	! CALL prognostic_equations_acc
[1171]	413	! i_left = nxr-nbgp+1; i_right = nxr
	414	! j_south = nys; j_north = nyn
	415	! CALL prognostic_equations_acc
[1128]	416
	417	!
	418	!-- Exchange of ghost points (lateral boundary conditions)
	419	IF ( background_communication ) THEN
	420
	421	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
	422
	423	send_receive = 'lr'
	424	sendrecv_in_background = .TRUE.
	425	req = 0
	426	req_count = 0
	427
	428	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	429	on_device = .TRUE. ! to be removed after complete porting
	430	ELSE ! of ghost point exchange
	431	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	432	ENDIF
	433
	434	CALL exchange_horiz( u_p, nbgp )
	435	CALL exchange_horiz( v_p, nbgp )
	436	CALL exchange_horiz( w_p, nbgp )
	437	CALL exchange_horiz( pt_p, nbgp )
	438	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	439	IF ( ocean ) THEN
	440	CALL exchange_horiz( sa_p, nbgp )
	441	CALL exchange_horiz( rho, nbgp )
	442	CALL exchange_horiz( prho, nbgp )
	443	ENDIF
	444	IF (humidity .OR. passive_scalar) THEN
	445	CALL exchange_horiz( q_p, nbgp )
	446	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	447	CALL exchange_horiz( qr_p, nbgp )
	448	CALL exchange_horiz( nr_p, nbgp )
	449	ENDIF
	450	ENDIF
	451	IF ( cloud_droplets ) THEN
	452	CALL exchange_horiz( ql, nbgp )
	453	CALL exchange_horiz( ql_c, nbgp )
	454	CALL exchange_horiz( ql_v, nbgp )
	455	CALL exchange_horiz( ql_vp, nbgp )
	456	ENDIF
[1671]	457	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	458	THEN
	459	CALL exchange_horiz( diss, nbgp )
	460	ENDIF
[1128]	461
	462	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	463	on_device = .FALSE. ! to be removed after complete porting
	464	ELSE ! of ghost point exchange
	465	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	466	ENDIF
	467
	468	sendrecv_in_background = .FALSE.
	469
	470	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
	471
	472	ENDIF
	473
[1171]	474	! i_left = nxl+nbgp; i_right = nxr-nbgp
	475	! j_south = nys; j_north = nys+nbgp-1
	476	! CALL prognostic_equations_acc
	477	! i_left = nxl+nbgp; i_right = nxr-nbgp
	478	! j_south = nyn-nbgp+1; j_north = nyn
	479	! CALL prognostic_equations_acc
[1128]	480
	481	IF ( background_communication ) THEN
	482	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
	483	#if defined( __parallel )
	484	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	485	#endif
	486	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
	487
	488	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
	489
	490	send_receive = 'ns'
	491	sendrecv_in_background = .TRUE.
	492	req = 0
	493	req_count = 0
	494
	495	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	496	on_device = .TRUE. ! to be removed after complete porting
	497	ELSE ! of ghost point exchange
	498	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	499	ENDIF
	500
	501	CALL exchange_horiz( u_p, nbgp )
	502	CALL exchange_horiz( v_p, nbgp )
	503	CALL exchange_horiz( w_p, nbgp )
	504	CALL exchange_horiz( pt_p, nbgp )
	505	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	506	IF ( ocean ) THEN
	507	CALL exchange_horiz( sa_p, nbgp )
	508	CALL exchange_horiz( rho, nbgp )
	509	CALL exchange_horiz( prho, nbgp )
	510	ENDIF
	511	IF (humidity .OR. passive_scalar) THEN
	512	CALL exchange_horiz( q_p, nbgp )
	513	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	514	CALL exchange_horiz( qr_p, nbgp )
	515	CALL exchange_horiz( nr_p, nbgp )
	516	ENDIF
	517	ENDIF
	518	IF ( cloud_droplets ) THEN
	519	CALL exchange_horiz( ql, nbgp )
	520	CALL exchange_horiz( ql_c, nbgp )
	521	CALL exchange_horiz( ql_v, nbgp )
	522	CALL exchange_horiz( ql_vp, nbgp )
	523	ENDIF
[1671]	524	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	525	THEN
	526	CALL exchange_horiz( diss, nbgp )
	527	ENDIF
[1128]	528
	529	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	530	on_device = .FALSE. ! to be removed after complete porting
	531	ELSE ! of ghost point exchange
	532	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	533	ENDIF
	534
	535	sendrecv_in_background = .FALSE.
	536
	537	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	538
	539	ENDIF
	540
[1171]	541	! i_left = nxl+nbgp; i_right = nxr-nbgp
	542	! j_south = nys+nbgp; j_north = nyn-nbgp
	543	! CALL prognostic_equations_acc
[1128]	544
	545	IF ( background_communication ) THEN
	546	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
	547	#if defined( __parallel )
	548	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	549	#endif
	550	send_receive = 'al'
	551	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
	552	ENDIF
	553
[1]	554	ENDIF
	555
	556	!
[849]	557	!-- Particle transport/physics with the Lagrangian particle model
	558	!-- (only once during intermediate steps, because it uses an Euler-step)
[1128]	559	!-- ### particle model should be moved before prognostic_equations, in order
	560	!-- to regard droplet interactions directly
[63]	561	IF ( particle_advection .AND. &
	562	simulated_time >= particle_advection_start .AND. &
[1]	563	intermediate_timestep_count == 1 ) THEN
[849]	564	CALL lpm
	565	first_call_lpm = .FALSE.
[1]	566	ENDIF
	567
	568	!
	569	!-- Interaction of droplets with temperature and specific humidity.
	570	!-- Droplet condensation and evaporation is calculated within
	571	!-- advec_particles.
	572	IF ( cloud_droplets .AND. &
	573	intermediate_timestep_count == intermediate_timestep_count_max )&
	574	THEN
	575	CALL interaction_droplets_ptq
	576	ENDIF
	577
	578	!
	579	!-- Exchange of ghost points (lateral boundary conditions)
[1128]	580	IF ( .NOT. background_communication ) THEN
[1113]	581
[1128]	582	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
[1113]	583
[1128]	584	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	585	on_device = .TRUE. ! to be removed after complete porting
	586	ELSE ! of ghost point exchange
	587	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
[1053]	588	ENDIF
[1]	589
[1128]	590	CALL exchange_horiz( u_p, nbgp )
	591	CALL exchange_horiz( v_p, nbgp )
	592	CALL exchange_horiz( w_p, nbgp )
	593	CALL exchange_horiz( pt_p, nbgp )
	594	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	595	IF ( ocean ) THEN
	596	CALL exchange_horiz( sa_p, nbgp )
	597	CALL exchange_horiz( rho, nbgp )
	598	CALL exchange_horiz( prho, nbgp )
	599	ENDIF
	600	IF (humidity .OR. passive_scalar) THEN
	601	CALL exchange_horiz( q_p, nbgp )
[1179]	602	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	603	precipitation ) THEN
[1128]	604	CALL exchange_horiz( qr_p, nbgp )
	605	CALL exchange_horiz( nr_p, nbgp )
	606	ENDIF
	607	ENDIF
	608	IF ( cloud_droplets ) THEN
	609	CALL exchange_horiz( ql, nbgp )
	610	CALL exchange_horiz( ql_c, nbgp )
	611	CALL exchange_horiz( ql_v, nbgp )
	612	CALL exchange_horiz( ql_vp, nbgp )
	613	ENDIF
[1671]	614	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	615	THEN
	616	CALL exchange_horiz( diss, nbgp )
	617	ENDIF
[1128]	618
	619	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	620	on_device = .FALSE. ! to be removed after complete porting
	621	ELSE ! of ghost point exchange
	622	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	623	ENDIF
	624
	625	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	626
[1113]	627	ENDIF
	628
[1]	629	!
	630	!-- Boundary conditions for the prognostic quantities (except of the
	631	!-- velocities at the outflow in case of a non-cyclic lateral wall)
[1113]	632	CALL boundary_conds
[1]	633
	634	!
[1496]	635	!-- When using the land surface model:
	636	!-- 1) solve energy balance equation to calculate new skin temperature
	637	!-- 2) run soil model
	638	IF ( land_surface ) THEN
	639
	640	CALL cpu_log( log_point(54), 'land_surface', 'start' )
	641
	642	CALL lsm_energy_balance
	643	CALL lsm_soil_model
	644
	645	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
	646
	647	ENDIF
	648
	649	!
[73]	650	!-- Swap the time levels in preparation for the next time step.
	651	CALL swap_timelevel
	652
	653	!
[1]	654	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
	655	!-- when a sloping surface is used
	656	IF ( sloping_surface ) THEN
[707]	657	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
	658	pt_slope_offset
	659	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
	660	pt_slope_offset
[1]	661	ENDIF
	662
	663	!
[151]	664	!-- Impose a turbulent inflow using the recycling method
	665	IF ( turbulent_inflow ) CALL inflow_turbulence
	666
	667	!
[1]	668	!-- Impose a random perturbation on the horizontal velocity field
[106]	669	IF ( create_disturbances .AND. &
	670	( call_psolver_at_all_substeps .AND. &
[1]	671	intermediate_timestep_count == intermediate_timestep_count_max )&
[106]	672	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
	673	intermediate_timestep_count == 1 ) ) &
[1]	674	THEN
	675	time_disturb = time_disturb + dt_3d
	676	IF ( time_disturb >= dt_disturb ) THEN
[1111]	677	!$acc update host( u, v )
[1113]	678	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
[87]	679	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
[75]	680	CALL disturb_field( nzb_u_inner, tend, u )
	681	CALL disturb_field( nzb_v_inner, tend, v )
[707]	682	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
[1]	683	!
	684	!-- Runs with a non-cyclic lateral wall need perturbations
	685	!-- near the inflow throughout the whole simulation
	686	dist_range = 1
[75]	687	CALL disturb_field( nzb_u_inner, tend, u )
	688	CALL disturb_field( nzb_v_inner, tend, v )
[1]	689	dist_range = 0
	690	ENDIF
[1113]	691	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
[1111]	692	!$acc update device( u, v )
[1]	693	time_disturb = time_disturb - dt_disturb
	694	ENDIF
	695	ENDIF
	696
	697	!
	698	!-- Reduce the velocity divergence via the equation for perturbation
	699	!-- pressure.
[106]	700	IF ( intermediate_timestep_count == 1 .OR. &
	701	call_psolver_at_all_substeps ) THEN
[1]	702	CALL pres
	703	ENDIF
	704
	705	!
	706	!-- If required, compute liquid water content
[1015]	707	IF ( cloud_physics ) THEN
	708	CALL calc_liquid_water_content
	709	!$acc update device( ql )
	710	ENDIF
[1115]	711	!
	712	!-- If required, compute virtual potential temperature
	713	IF ( humidity ) THEN
	714	CALL compute_vpt
	715	!$acc update device( vpt )
	716	ENDIF
[1585]	717
[1]	718	!
	719	!-- Compute the diffusion quantities
	720	IF ( .NOT. constant_diffusion ) THEN
	721
	722	!
[1276]	723	!-- Determine surface fluxes shf and qsws and surface values
	724	!-- pt_surface and q_surface in dependence on data from external
	725	!-- file LSF_DATA respectively
	726	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
	727	intermediate_timestep_count == intermediate_timestep_count_max )&
	728	THEN
	729	CALL ls_forcing_surf ( simulated_time )
	730	ENDIF
	731
	732	!
[1]	733	!-- First the vertical fluxes in the Prandtl layer are being computed
	734	IF ( prandtl_layer ) THEN
	735	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
	736	CALL prandtl_fluxes
	737	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
	738	ENDIF
[1241]	739
[1]	740	!
	741	!-- Compute the diffusion coefficients
	742	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
[75]	743	IF ( .NOT. humidity ) THEN
[97]	744	IF ( ocean ) THEN
[388]	745	CALL diffusivities( prho, prho_reference )
[97]	746	ELSE
	747	CALL diffusivities( pt, pt_reference )
	748	ENDIF
[1]	749	ELSE
[97]	750	CALL diffusivities( vpt, pt_reference )
[1]	751	ENDIF
	752	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
	753
	754	ENDIF
	755
	756	ENDDO ! Intermediate step loop
	757
	758	!
	759	!-- Increase simulation time and output times
[1111]	760	nr_timesteps_this_run = nr_timesteps_this_run + 1
[291]	761	current_timestep_number = current_timestep_number + 1
	762	simulated_time = simulated_time + dt_3d
	763	simulated_time_chr = time_to_string( simulated_time )
	764	time_since_reference_point = simulated_time - coupling_start_time
	765
[1]	766	IF ( simulated_time >= skip_time_data_output_av ) THEN
	767	time_do_av = time_do_av + dt_3d
	768	ENDIF
	769	IF ( simulated_time >= skip_time_do2d_xy ) THEN
	770	time_do2d_xy = time_do2d_xy + dt_3d
	771	ENDIF
	772	IF ( simulated_time >= skip_time_do2d_xz ) THEN
	773	time_do2d_xz = time_do2d_xz + dt_3d
	774	ENDIF
	775	IF ( simulated_time >= skip_time_do2d_yz ) THEN
	776	time_do2d_yz = time_do2d_yz + dt_3d
	777	ENDIF
	778	IF ( simulated_time >= skip_time_do3d ) THEN
	779	time_do3d = time_do3d + dt_3d
	780	ENDIF
[410]	781	DO mid = 1, masks
	782	IF ( simulated_time >= skip_time_domask(mid) ) THEN
	783	time_domask(mid)= time_domask(mid) + dt_3d
	784	ENDIF
	785	ENDDO
[1]	786	time_dvrp = time_dvrp + dt_3d
	787	IF ( simulated_time >= skip_time_dosp ) THEN
	788	time_dosp = time_dosp + dt_3d
	789	ENDIF
	790	time_dots = time_dots + dt_3d
[849]	791	IF ( .NOT. first_call_lpm ) THEN
[1]	792	time_dopts = time_dopts + dt_3d
	793	ENDIF
	794	IF ( simulated_time >= skip_time_dopr ) THEN
	795	time_dopr = time_dopr + dt_3d
	796	ENDIF
	797	time_dopr_listing = time_dopr_listing + dt_3d
	798	time_run_control = time_run_control + dt_3d
	799
	800	!
[102]	801	!-- Data exchange between coupled models
[291]	802	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[102]	803	time_coupling = time_coupling + dt_3d
[343]	804
[108]	805	!
	806	!-- In case of model termination initiated by the local model
	807	!-- (terminate_coupled > 0), the coupler must be skipped because it would
	808	!-- cause an MPI intercomminucation hang.
	809	!-- If necessary, the coupler will be called at the beginning of the
	810	!-- next restart run.
	811	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
[102]	812	CALL surface_coupler
	813	time_coupling = time_coupling - dt_coupling
	814	ENDDO
	815	ENDIF
	816
	817	!
[46]	818	!-- Execute user-defined actions
	819	CALL user_actions( 'after_integration' )
	820
	821	!
[1]	822	!-- If Galilei transformation is used, determine the distance that the
	823	!-- model has moved so far
	824	IF ( galilei_transformation ) THEN
	825	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
	826	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
	827	ENDIF
	828
	829	!
	830	!-- Check, if restart is necessary (because cpu-time is expiring or
	831	!-- because it is forced by user) and set stop flag
[108]	832	!-- This call is skipped if the remote model has already initiated a restart.
	833	IF ( .NOT. terminate_run ) CALL check_for_restart
[1]	834
	835	!
	836	!-- Carry out statistical analysis and output at the requested output times.
	837	!-- The MOD function is used for calculating the output time counters (like
	838	!-- time_dopr) in order to regard a possible decrease of the output time
	839	!-- interval in case of restart runs
	840
	841	!
	842	!-- Set a flag indicating that so far no statistics have been created
	843	!-- for this time step
	844	flow_statistics_called = .FALSE.
	845
	846	!
	847	!-- If required, call flow_statistics for averaging in time
[1342]	848	IF ( averaging_interval_pr /= 0.0_wp .AND. &
[1]	849	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
	850	simulated_time >= skip_time_dopr ) THEN
	851	time_dopr_av = time_dopr_av + dt_3d
	852	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
	853	do_sum = .TRUE.
	854	time_dopr_av = MOD( time_dopr_av, &
	855	MAX( dt_averaging_input_pr, dt_3d ) )
	856	ENDIF
	857	ENDIF
	858	IF ( do_sum ) CALL flow_statistics
	859
	860	!
[410]	861	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
[1342]	862	IF ( averaging_interval /= 0.0_wp .AND. &
[1]	863	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
	864	simulated_time >= skip_time_data_output_av ) &
	865	THEN
	866	time_do_sla = time_do_sla + dt_3d
	867	IF ( time_do_sla >= dt_averaging_input ) THEN
	868	CALL sum_up_3d_data
	869	average_count_3d = average_count_3d + 1
	870	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
	871	ENDIF
	872	ENDIF
	873
	874	!
	875	!-- Calculate spectra for time averaging
[1342]	876	IF ( averaging_interval_sp /= 0.0_wp .AND. &
[1]	877	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
	878	simulated_time >= skip_time_dosp ) THEN
	879	time_dosp_av = time_dosp_av + dt_3d
	880	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
	881	CALL calc_spectra
	882	time_dosp_av = MOD( time_dosp_av, &
	883	MAX( dt_averaging_input_pr, dt_3d ) )
	884	ENDIF
	885	ENDIF
	886
	887	!
	888	!-- Computation and output of run control parameters.
[1001]	889	!-- This is also done whenever perturbations have been imposed
[1]	890	IF ( time_run_control >= dt_run_control .OR. &
[1001]	891	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
[1]	892	THEN
	893	CALL run_control
	894	IF ( time_run_control >= dt_run_control ) THEN
	895	time_run_control = MOD( time_run_control, &
	896	MAX( dt_run_control, dt_3d ) )
	897	ENDIF
	898	ENDIF
	899
	900	!
	901	!-- Profile output (ASCII) on file
	902	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
	903	CALL print_1d
	904	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
	905	dt_3d ) )
	906	ENDIF
	907
	908	!
	909	!-- Graphic output for PROFIL
	910	IF ( time_dopr >= dt_dopr ) THEN
	911	IF ( dopr_n /= 0 ) CALL data_output_profiles
	912	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
[1342]	913	time_dopr_av = 0.0_wp ! due to averaging (see above)
[1]	914	ENDIF
	915
	916	!
	917	!-- Graphic output for time series
	918	IF ( time_dots >= dt_dots ) THEN
[48]	919	CALL data_output_tseries
[1]	920	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
	921	ENDIF
	922
	923	!
	924	!-- Output of spectra (formatted for use with PROFIL), in case of no
	925	!-- time averaging, spectra has to be calculated before
	926	IF ( time_dosp >= dt_dosp ) THEN
	927	IF ( average_count_sp == 0 ) CALL calc_spectra
	928	CALL data_output_spectra
	929	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
	930	ENDIF
	931
	932	!
	933	!-- 2d-data output (cross-sections)
	934	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
	935	CALL data_output_2d( 'xy', 0 )
	936	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
	937	ENDIF
	938	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
	939	CALL data_output_2d( 'xz', 0 )
	940	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
	941	ENDIF
	942	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
	943	CALL data_output_2d( 'yz', 0 )
	944	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
	945	ENDIF
	946
	947	!
	948	!-- 3d-data output (volume data)
	949	IF ( time_do3d >= dt_do3d ) THEN
	950	CALL data_output_3d( 0 )
	951	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
	952	ENDIF
	953
	954	!
[410]	955	!-- masked data output
[1308]	956	!-- Parallel netcdf output is not tested so far for masked data, hence
	957	!-- netcdf_data_format is switched back to non-paralell output.
	958	netcdf_data_format_save = netcdf_data_format
	959	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	960	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	961	DO mid = 1, masks
	962	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
	963	CALL data_output_mask( 0 )
	964	time_domask(mid) = MOD( time_domask(mid), &
	965	MAX( dt_domask(mid), dt_3d ) )
	966	ENDIF
	967	ENDDO
[1308]	968	netcdf_data_format = netcdf_data_format_save
[410]	969
	970	!
	971	!-- Output of time-averaged 2d/3d/masked data
[1]	972	IF ( time_do_av >= dt_data_output_av ) THEN
	973	CALL average_3d_data
	974	CALL data_output_2d( 'xy', 1 )
	975	CALL data_output_2d( 'xz', 1 )
	976	CALL data_output_2d( 'yz', 1 )
	977	CALL data_output_3d( 1 )
[1308]	978	!-- Parallel netcdf output is not tested so far for masked data, hence
	979	!-- netcdf_data_format is switched back to non-paralell output.
	980	netcdf_data_format_save = netcdf_data_format
	981	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	982	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	983	DO mid = 1, masks
	984	CALL data_output_mask( 1 )
	985	ENDDO
[1308]	986	netcdf_data_format = netcdf_data_format_save
[1]	987	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
	988	ENDIF
	989
	990	!
	991	!-- Output of particle time series
[253]	992	IF ( particle_advection ) THEN
	993	IF ( time_dopts >= dt_dopts .OR. &
	994	( simulated_time >= particle_advection_start .AND. &
[849]	995	first_call_lpm ) ) THEN
[253]	996	CALL data_output_ptseries
	997	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
	998	ENDIF
[1]	999	ENDIF
	1000
	1001	!
	1002	!-- Output of dvrp-graphics (isosurface, particles, slicer)
	1003	#if defined( __dvrp_graphics )
	1004	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
	1005	#endif
	1006	IF ( time_dvrp >= dt_dvrp ) THEN
	1007	CALL data_output_dvrp
	1008	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
	1009	ENDIF
	1010	#if defined( __dvrp_graphics )
	1011	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	1012	#endif
	1013
	1014	!
	1015	!-- If required, set the heat flux for the next time step at a random value
	1016	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
	1017
	1018	!
	1019	!-- Execute user-defined actions
	1020	CALL user_actions( 'after_timestep' )
	1021
[1402]	1022	!
	1023	!-- Output elapsed simulated time in form of a progress bar on stdout
	1024	IF ( myid == 0 ) CALL output_progress_bar
	1025
[1]	1026	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
	1027
[667]	1028
[1]	1029	ENDDO ! time loop
	1030
[1402]	1031	IF ( myid == 0 ) CALL finish_progress_bar
	1032
[1]	1033	#if defined( __dvrp_graphics )
	1034	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
	1035	#endif
	1036
[1402]	1037	CALL location_message( 'finished time-stepping', .TRUE. )
[1384]	1038
[1]	1039	END SUBROUTINE time_integration

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