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source: palm/trunk/SOURCE/time_integration.f90 @ 1369

Last change on this file since 1369 was 1366, checked in by boeske, 11 years ago
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[1]	1	SUBROUTINE time_integration
	2
[1036]	3	!--------------------------------------------------------------------------------!
	4	! This file is part of PALM.
	5	!
	6	! PALM is free software: you can redistribute it and/or modify it under the terms
	7	! of the GNU General Public License as published by the Free Software Foundation,
	8	! either version 3 of the License, or (at your option) any later version.
	9	!
	10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	13	!
	14	! You should have received a copy of the GNU General Public License along with
	15	! PALM. If not, see <http://www.gnu.org/licenses/>.
	16	!
[1310]	17	! Copyright 1997-2014 Leibniz Universitaet Hannover
[1036]	18	!--------------------------------------------------------------------------------!
	19	!
[484]	20	! Current revisions:
[1092]	21	! ------------------
[1366]	22	!
	23	!
	24	! Former revisions:
	25	! -----------------
	26	! $Id: time_integration.f90 1366 2014-04-22 15:06:33Z raasch $
	27	!
	28	! 1365 2014-04-22 15:03:56Z boeske
[1365]	29	! Reset sums_ls_l to zero at each timestep
	30	! +sums_ls_l
	31	! Calculation of reference state (previously in subroutine calc_mean_profile)
	32
[1343]	33	! 1342 2014-03-26 17:04:47Z kanani
	34	! REAL constants defined as wp-kind
	35	!
[1321]	36	! 1320 2014-03-20 08:40:49Z raasch
[1320]	37	! ONLY-attribute added to USE-statements,
	38	! kind-parameters added to all INTEGER and REAL declaration statements,
	39	! kinds are defined in new module kinds,
	40	! old module precision_kind is removed,
	41	! revision history before 2012 removed,
	42	! comment fields (!:) to be used for variable explanations added to
	43	! all variable declaration statements
[1319]	44	! 1318 2014-03-17 13:35:16Z raasch
	45	! module interfaces removed
	46	!
[1309]	47	! 1308 2014-03-13 14:58:42Z fricke
	48	! +netcdf_data_format_save
	49	! For masked data, parallel netcdf output is not tested so far, hence
	50	! netcdf_data_format is switched back to non-paralell output.
	51	!
[1277]	52	! 1276 2014-01-15 13:40:41Z heinze
	53	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
	54	!
[1258]	55	! 1257 2013-11-08 15:18:40Z raasch
	56	! acc-update-host directive for timestep removed
	57	!
[1242]	58	! 1241 2013-10-30 11:36:58Z heinze
	59	! Generalize calc_mean_profile for wider use
	60	! Determine shf and qsws in dependence on data from LSF_DATA
	61	! Determine ug and vg in dependence on data from LSF_DATA
[1222]	62	! 1221 2013-09-10 08:59:13Z raasch
	63	! host update of arrays before timestep is called
	64	!
[1182]	65	! 1179 2013-06-14 05:57:58Z raasch
	66	! mean profiles for reference state are only calculated if required,
	67	! small bugfix for background communication
	68	!
[1172]	69	! 1171 2013-05-30 11:27:45Z raasch
	70	! split of prognostic_equations deactivated (comment lines), for the time being
	71	!
[1132]	72	! 1128 2013-04-12 06:19:32Z raasch
[1128]	73	! asynchronous transfer of ghost point data realized for acc-optimized version:
	74	! prognostic_equations are first called two times for those points required for
	75	! the left-right and north-south exchange, respectively, and then for the
	76	! remaining points,
	77	! those parts requiring global communication moved from prognostic_equations to
	78	! here
[392]	79	!
[1116]	80	! 1115 2013-03-26 18:16:16Z hoffmann
	81	! calculation of qr and nr is restricted to precipitation
	82	!
[1114]	83	! 1113 2013-03-10 02:48:14Z raasch
	84	! GPU-porting of boundary conditions,
	85	! openACC directives updated
	86	! formal parameter removed from routine boundary_conds
	87	!
[1112]	88	! 1111 2013-03-08 23:54:10Z raasch
	89	! +internal timestep counter for cpu statistics added,
	90	! openACC directives updated
	91	!
[1093]	92	! 1092 2013-02-02 11:24:22Z raasch
	93	! unused variables removed
	94	!
[1066]	95	! 1065 2012-11-22 17:42:36Z hoffmann
	96	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
	97	!
[1054]	98	! 1053 2012-11-13 17:11:03Z hoffmann
	99	! exchange of ghost points for nr, qr added
	100	!
[1037]	101	! 1036 2012-10-22 13:43:42Z raasch
	102	! code put under GPL (PALM 3.9)
	103	!
[1020]	104	! 1019 2012-09-28 06:46:45Z raasch
	105	! non-optimized version of prognostic_equations removed
	106	!
[1017]	107	! 1015 2012-09-27 09:23:24Z raasch
	108	! +call of prognostic_equations_acc
	109	!
[1002]	110	! 1001 2012-09-13 14:08:46Z raasch
	111	! all actions concerning leapfrog- and upstream-spline-scheme removed
	112	!
[850]	113	! 849 2012-03-15 10:35:09Z raasch
	114	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
	115	!
[826]	116	! 825 2012-02-19 03:03:44Z raasch
	117	! wang_collision_kernel renamed wang_kernel
	118	!
[1]	119	! Revision 1.1 1997/08/11 06:19:04 raasch
	120	! Initial revision
	121	!
	122	!
	123	! Description:
	124	! ------------
	125	! Integration in time of the model equations, statistical analysis and graphic
	126	! output
	127	!------------------------------------------------------------------------------!
	128
[1320]	129	USE advec_ws, &
	130	ONLY: ws_statistics
	131
	132	USE arrays_3d, &
[1365]	133	ONLY: diss, e_p, nr_p, prho, pt, pt_p, q, ql, ql_c, ql_v, ql_vp, qr_p,&
	134	q_p, ref_state, rho, sa_p, tend, u, u_p, v, vpt, v_p, w_p
[1320]	135
[1365]	136	USE calc_mean_profile_mod, &
[1320]	137	ONLY: calc_mean_profile
	138
	139	USE control_parameters, &
	140	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
	141	average_count_sp, averaging_interval, averaging_interval_pr, &
	142	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, &
	143	call_psolver_at_all_substeps, cloud_droplets, cloud_physics, &
	144	constant_heatflux, create_disturbances, dopr_n, &
	145	constant_diffusion, coupling_mode, coupling_start_time, &
	146	current_timestep_number, disturbance_created, &
	147	disturbance_energy_limit, dist_range, do_sum, dt_3d, &
	148	dt_averaging_input, dt_averaging_input_pr, dt_coupling, &
	149	dt_data_output_av, dt_disturb, dt_do2d_xy, dt_do2d_xz, &
	150	dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
	151	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
	152	end_time, first_call_lpm, galilei_transformation, humidity, &
	153	icloud_scheme, intermediate_timestep_count, &
	154	intermediate_timestep_count_max, large_scale_forcing, &
	155	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
[1365]	156	netcdf_data_format, neutral, nr_timesteps_this_run, nudging, &
	157	ocean, on_device, passive_scalar, prandtl_layer, precipitation, &
[1320]	158	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
	159	run_coupled, simulated_time, simulated_time_chr, &
	160	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
	161	skip_time_do3d, skip_time_domask, skip_time_dopr, &
	162	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
	163	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
	164	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
	165	time_do3d, time_domask, time_dopr, time_dopr_av, &
	166	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
	167	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
	168	time_run_control, time_since_reference_point, turbulence, &
	169	turbulent_inflow, use_initial_profile_as_reference, &
	170	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
	171	ws_scheme_sca
	172
	173	USE cpulog, &
	174	ONLY: cpu_log, log_point, log_point_s
	175
	176	USE indices, &
	177	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
	178	nxrg, nyn, nys, nzb, nzb_u_inner, nzb_v_inner
	179
	180	USE interaction_droplets_ptq_mod, &
	181	ONLY: interaction_droplets_ptq
	182
	183	USE kinds
	184
	185	USE ls_forcing_mod, &
	186	ONLY: ls_forcing_surf, ls_forcing_vert
	187
[1365]	188	USE nudge_mod, &
	189	ONLY: calc_tnudge
	190
[1320]	191	USE particle_attributes, &
	192	ONLY: particle_advection, particle_advection_start, wang_kernel
	193
[1]	194	USE pegrid
	195
[1320]	196	USE production_e_mod, &
	197	ONLY: production_e_init
	198
	199	USE prognostic_equations_mod, &
	200	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
	201	prognostic_equations_vector
	202
	203	USE statistics, &
[1365]	204	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
[1320]	205
	206	USE user_actions_mod, &
	207	ONLY: user_actions
	208
[1]	209	IMPLICIT NONE
	210
[1320]	211	CHARACTER (LEN=9) :: time_to_string !:
[1]	212
[1320]	213	INTEGER(iwp) :: netcdf_data_format_save !:
	214
[1]	215	!
	216	!-- At the beginning of a simulation determine the time step as well as
	217	!-- determine and print out the run control parameters
[1342]	218	IF ( simulated_time == 0.0_wp ) CALL timestep
[667]	219
[1]	220	CALL run_control
	221
[667]	222
[108]	223	!
	224	!-- Data exchange between coupled models in case that a call has been omitted
	225	!-- at the end of the previous run of a job chain.
[291]	226	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[108]	227	!
	228	!-- In case of model termination initiated by the local model the coupler
	229	!-- must not be called because this would again cause an MPI hang.
	230	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
	231	CALL surface_coupler
	232	time_coupling = time_coupling - dt_coupling
	233	ENDDO
[1342]	234	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
[348]	235	THEN
	236	time_coupling = time_since_reference_point
	237	ENDIF
[108]	238	ENDIF
	239
	240
[1]	241	#if defined( __dvrp_graphics )
	242	!
	243	!-- Time measurement with dvrp software
	244	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	245	#endif
	246
	247	!
	248	!-- Start of the time loop
	249	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
	250	.NOT. terminate_run )
	251
	252	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
[1221]	253
[1]	254	!
	255	!-- Determine size of next time step
[1342]	256	IF ( simulated_time /= 0.0_wp ) THEN
[1221]	257	CALL timestep
	258	ENDIF
	259
[1]	260	!
[1241]	261	!-- Determine ug, vg and w_subs in dependence on data from external file
	262	!-- LSF_DATA
[1365]	263	IF ( large_scale_forcing .AND. lsf_vert ) THEN
[1241]	264	CALL ls_forcing_vert ( simulated_time )
[1365]	265	sums_ls_l = 0.0_wp
[1241]	266	ENDIF
	267
	268	!
[1]	269	!-- Execute the user-defined actions
	270	CALL user_actions( 'before_timestep' )
	271
	272	!
	273	!-- Start of intermediate step loop
	274	intermediate_timestep_count = 0
	275	DO WHILE ( intermediate_timestep_count < &
	276	intermediate_timestep_count_max )
	277
	278	intermediate_timestep_count = intermediate_timestep_count + 1
	279
	280	!
	281	!-- Set the steering factors for the prognostic equations which depend
	282	!-- on the timestep scheme
	283	CALL timestep_scheme_steering
	284
	285	!
[1128]	286	!-- Calculate those variables needed in the tendency terms which need
	287	!-- global communication
[1179]	288	IF ( .NOT. use_single_reference_value .AND. &
	289	.NOT. use_initial_profile_as_reference ) THEN
	290	!
	291	!-- Horizontally averaged profiles to be used as reference state in
	292	!-- buoyancy terms (WARNING: only the respective last call of
	293	!-- calc_mean_profile defines the reference state!)
[1365]	294	IF ( .NOT. neutral ) THEN
	295	CALL calc_mean_profile( pt, 4 )
	296	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
	297	ENDIF
	298	IF ( ocean ) THEN
	299	CALL calc_mean_profile( rho, 64 )
	300	ref_state(:) = hom(:,1,64,0)
	301	ENDIF
	302	IF ( humidity ) THEN
	303	CALL calc_mean_profile( vpt, 44 )
	304	ref_state(:) = hom(:,1,44,0)
	305	ENDIF
	306
[1179]	307	ENDIF
	308
[1128]	309	IF ( .NOT. constant_diffusion ) CALL production_e_init
	310	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
	311	intermediate_timestep_count == 1 ) CALL ws_statistics
[1365]	312	!
	313	!-- In case of nudging calculate current nudging time scale and horizontal
	314	!-- means of u,v,pt and q
	315	IF ( nudging ) THEN
	316	CALL calc_tnudge( simulated_time )
	317	CALL calc_mean_profile( u, 1 )
	318	CALL calc_mean_profile( v, 2 )
	319	CALL calc_mean_profile( pt, 4 )
	320	CALL calc_mean_profile( q, 41 )
	321	ENDIF
[1128]	322
	323	!
[1]	324	!-- Solve the prognostic equations. A fast cache optimized version with
	325	!-- only one single loop is used in case of Piascek-Williams advection
	326	!-- scheme. NEC vector machines use a different version, because
	327	!-- in the other versions a good vectorization is prohibited due to
	328	!-- inlining problems.
[1019]	329	IF ( loop_optimization == 'cache' ) THEN
	330	CALL prognostic_equations_cache
	331	ELSEIF ( loop_optimization == 'vector' ) THEN
[63]	332	CALL prognostic_equations_vector
[1015]	333	ELSEIF ( loop_optimization == 'acc' ) THEN
[1171]	334	i_left = nxl; i_right = nxr
	335	j_south = nys; j_north = nyn
	336	CALL prognostic_equations_acc
	337
	338	! i_left = nxl; i_right = nxl+nbgp-1
[1128]	339	! j_south = nys; j_north = nyn
	340	! CALL prognostic_equations_acc
[1171]	341	! i_left = nxr-nbgp+1; i_right = nxr
	342	! j_south = nys; j_north = nyn
	343	! CALL prognostic_equations_acc
[1128]	344
	345	!
	346	!-- Exchange of ghost points (lateral boundary conditions)
	347	IF ( background_communication ) THEN
	348
	349	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
	350
	351	send_receive = 'lr'
	352	sendrecv_in_background = .TRUE.
	353	req = 0
	354	req_count = 0
	355
	356	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	357	on_device = .TRUE. ! to be removed after complete porting
	358	ELSE ! of ghost point exchange
	359	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	360	ENDIF
	361
	362	CALL exchange_horiz( u_p, nbgp )
	363	CALL exchange_horiz( v_p, nbgp )
	364	CALL exchange_horiz( w_p, nbgp )
	365	CALL exchange_horiz( pt_p, nbgp )
	366	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	367	IF ( ocean ) THEN
	368	CALL exchange_horiz( sa_p, nbgp )
	369	CALL exchange_horiz( rho, nbgp )
	370	CALL exchange_horiz( prho, nbgp )
	371	ENDIF
	372	IF (humidity .OR. passive_scalar) THEN
	373	CALL exchange_horiz( q_p, nbgp )
	374	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	375	CALL exchange_horiz( qr_p, nbgp )
	376	CALL exchange_horiz( nr_p, nbgp )
	377	ENDIF
	378	ENDIF
	379	IF ( cloud_droplets ) THEN
	380	CALL exchange_horiz( ql, nbgp )
	381	CALL exchange_horiz( ql_c, nbgp )
	382	CALL exchange_horiz( ql_v, nbgp )
	383	CALL exchange_horiz( ql_vp, nbgp )
	384	ENDIF
	385	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	386
	387	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	388	on_device = .FALSE. ! to be removed after complete porting
	389	ELSE ! of ghost point exchange
	390	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	391	ENDIF
	392
	393	sendrecv_in_background = .FALSE.
	394
	395	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
	396
	397	ENDIF
	398
[1171]	399	! i_left = nxl+nbgp; i_right = nxr-nbgp
	400	! j_south = nys; j_north = nys+nbgp-1
	401	! CALL prognostic_equations_acc
	402	! i_left = nxl+nbgp; i_right = nxr-nbgp
	403	! j_south = nyn-nbgp+1; j_north = nyn
	404	! CALL prognostic_equations_acc
[1128]	405
	406	IF ( background_communication ) THEN
	407	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
	408	#if defined( __parallel )
	409	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	410	#endif
	411	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
	412
	413	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
	414
	415	send_receive = 'ns'
	416	sendrecv_in_background = .TRUE.
	417	req = 0
	418	req_count = 0
	419
	420	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	421	on_device = .TRUE. ! to be removed after complete porting
	422	ELSE ! of ghost point exchange
	423	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	424	ENDIF
	425
	426	CALL exchange_horiz( u_p, nbgp )
	427	CALL exchange_horiz( v_p, nbgp )
	428	CALL exchange_horiz( w_p, nbgp )
	429	CALL exchange_horiz( pt_p, nbgp )
	430	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	431	IF ( ocean ) THEN
	432	CALL exchange_horiz( sa_p, nbgp )
	433	CALL exchange_horiz( rho, nbgp )
	434	CALL exchange_horiz( prho, nbgp )
	435	ENDIF
	436	IF (humidity .OR. passive_scalar) THEN
	437	CALL exchange_horiz( q_p, nbgp )
	438	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	439	CALL exchange_horiz( qr_p, nbgp )
	440	CALL exchange_horiz( nr_p, nbgp )
	441	ENDIF
	442	ENDIF
	443	IF ( cloud_droplets ) THEN
	444	CALL exchange_horiz( ql, nbgp )
	445	CALL exchange_horiz( ql_c, nbgp )
	446	CALL exchange_horiz( ql_v, nbgp )
	447	CALL exchange_horiz( ql_vp, nbgp )
	448	ENDIF
	449	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	450
	451	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	452	on_device = .FALSE. ! to be removed after complete porting
	453	ELSE ! of ghost point exchange
	454	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	455	ENDIF
	456
	457	sendrecv_in_background = .FALSE.
	458
	459	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	460
	461	ENDIF
	462
[1171]	463	! i_left = nxl+nbgp; i_right = nxr-nbgp
	464	! j_south = nys+nbgp; j_north = nyn-nbgp
	465	! CALL prognostic_equations_acc
[1128]	466
	467	IF ( background_communication ) THEN
	468	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
	469	#if defined( __parallel )
	470	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	471	#endif
	472	send_receive = 'al'
	473	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
	474	ENDIF
	475
[1]	476	ENDIF
	477
	478	!
[849]	479	!-- Particle transport/physics with the Lagrangian particle model
	480	!-- (only once during intermediate steps, because it uses an Euler-step)
[1128]	481	!-- ### particle model should be moved before prognostic_equations, in order
	482	!-- to regard droplet interactions directly
[63]	483	IF ( particle_advection .AND. &
	484	simulated_time >= particle_advection_start .AND. &
[1]	485	intermediate_timestep_count == 1 ) THEN
[849]	486	CALL lpm
	487	first_call_lpm = .FALSE.
[1]	488	ENDIF
	489
	490	!
	491	!-- Interaction of droplets with temperature and specific humidity.
	492	!-- Droplet condensation and evaporation is calculated within
	493	!-- advec_particles.
	494	IF ( cloud_droplets .AND. &
	495	intermediate_timestep_count == intermediate_timestep_count_max )&
	496	THEN
	497	CALL interaction_droplets_ptq
	498	ENDIF
	499
	500	!
	501	!-- Exchange of ghost points (lateral boundary conditions)
[1128]	502	IF ( .NOT. background_communication ) THEN
[1113]	503
[1128]	504	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
[1113]	505
[1128]	506	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	507	on_device = .TRUE. ! to be removed after complete porting
	508	ELSE ! of ghost point exchange
	509	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
[1053]	510	ENDIF
[1]	511
[1128]	512	CALL exchange_horiz( u_p, nbgp )
	513	CALL exchange_horiz( v_p, nbgp )
	514	CALL exchange_horiz( w_p, nbgp )
	515	CALL exchange_horiz( pt_p, nbgp )
	516	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	517	IF ( ocean ) THEN
	518	CALL exchange_horiz( sa_p, nbgp )
	519	CALL exchange_horiz( rho, nbgp )
	520	CALL exchange_horiz( prho, nbgp )
	521	ENDIF
	522	IF (humidity .OR. passive_scalar) THEN
	523	CALL exchange_horiz( q_p, nbgp )
[1179]	524	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	525	precipitation ) THEN
[1128]	526	CALL exchange_horiz( qr_p, nbgp )
	527	CALL exchange_horiz( nr_p, nbgp )
	528	ENDIF
	529	ENDIF
	530	IF ( cloud_droplets ) THEN
	531	CALL exchange_horiz( ql, nbgp )
	532	CALL exchange_horiz( ql_c, nbgp )
	533	CALL exchange_horiz( ql_v, nbgp )
	534	CALL exchange_horiz( ql_vp, nbgp )
	535	ENDIF
	536	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	537
	538	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	539	on_device = .FALSE. ! to be removed after complete porting
	540	ELSE ! of ghost point exchange
	541	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	542	ENDIF
	543
	544	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	545
[1113]	546	ENDIF
	547
[1]	548	!
	549	!-- Boundary conditions for the prognostic quantities (except of the
	550	!-- velocities at the outflow in case of a non-cyclic lateral wall)
[1113]	551	CALL boundary_conds
[1]	552
	553	!
[73]	554	!-- Swap the time levels in preparation for the next time step.
	555	CALL swap_timelevel
	556
	557	!
[1]	558	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
	559	!-- when a sloping surface is used
	560	IF ( sloping_surface ) THEN
[707]	561	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
	562	pt_slope_offset
	563	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
	564	pt_slope_offset
[1]	565	ENDIF
	566
	567	!
[151]	568	!-- Impose a turbulent inflow using the recycling method
	569	IF ( turbulent_inflow ) CALL inflow_turbulence
	570
	571	!
[1]	572	!-- Impose a random perturbation on the horizontal velocity field
[106]	573	IF ( create_disturbances .AND. &
	574	( call_psolver_at_all_substeps .AND. &
[1]	575	intermediate_timestep_count == intermediate_timestep_count_max )&
[106]	576	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
	577	intermediate_timestep_count == 1 ) ) &
[1]	578	THEN
	579	time_disturb = time_disturb + dt_3d
	580	IF ( time_disturb >= dt_disturb ) THEN
[1111]	581	!$acc update host( u, v )
[1113]	582	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
[87]	583	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
[75]	584	CALL disturb_field( nzb_u_inner, tend, u )
	585	CALL disturb_field( nzb_v_inner, tend, v )
[707]	586	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
[1]	587	!
	588	!-- Runs with a non-cyclic lateral wall need perturbations
	589	!-- near the inflow throughout the whole simulation
	590	dist_range = 1
[75]	591	CALL disturb_field( nzb_u_inner, tend, u )
	592	CALL disturb_field( nzb_v_inner, tend, v )
[1]	593	dist_range = 0
	594	ENDIF
[1113]	595	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
[1111]	596	!$acc update device( u, v )
[1]	597	time_disturb = time_disturb - dt_disturb
	598	ENDIF
	599	ENDIF
	600
	601	!
	602	!-- Reduce the velocity divergence via the equation for perturbation
	603	!-- pressure.
[106]	604	IF ( intermediate_timestep_count == 1 .OR. &
	605	call_psolver_at_all_substeps ) THEN
[1]	606	CALL pres
	607	ENDIF
	608
	609	!
	610	!-- If required, compute liquid water content
[1015]	611	IF ( cloud_physics ) THEN
	612	CALL calc_liquid_water_content
	613	!$acc update device( ql )
	614	ENDIF
[1115]	615	!
	616	!-- If required, compute virtual potential temperature
	617	IF ( humidity ) THEN
	618	CALL compute_vpt
	619	!$acc update device( vpt )
	620	ENDIF
[1]	621	!
	622	!-- Compute the diffusion quantities
	623	IF ( .NOT. constant_diffusion ) THEN
	624
	625	!
[1276]	626	!-- Determine surface fluxes shf and qsws and surface values
	627	!-- pt_surface and q_surface in dependence on data from external
	628	!-- file LSF_DATA respectively
	629	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
	630	intermediate_timestep_count == intermediate_timestep_count_max )&
	631	THEN
	632	CALL ls_forcing_surf ( simulated_time )
	633	ENDIF
	634
	635	!
[1]	636	!-- First the vertical fluxes in the Prandtl layer are being computed
	637	IF ( prandtl_layer ) THEN
	638	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
	639	CALL prandtl_fluxes
	640	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
	641	ENDIF
[1241]	642
[1]	643	!
	644	!-- Compute the diffusion coefficients
	645	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
[75]	646	IF ( .NOT. humidity ) THEN
[97]	647	IF ( ocean ) THEN
[388]	648	CALL diffusivities( prho, prho_reference )
[97]	649	ELSE
	650	CALL diffusivities( pt, pt_reference )
	651	ENDIF
[1]	652	ELSE
[97]	653	CALL diffusivities( vpt, pt_reference )
[1]	654	ENDIF
	655	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
	656
	657	ENDIF
	658
	659	ENDDO ! Intermediate step loop
	660
	661	!
	662	!-- Increase simulation time and output times
[1111]	663	nr_timesteps_this_run = nr_timesteps_this_run + 1
[291]	664	current_timestep_number = current_timestep_number + 1
	665	simulated_time = simulated_time + dt_3d
	666	simulated_time_chr = time_to_string( simulated_time )
	667	time_since_reference_point = simulated_time - coupling_start_time
	668
[1]	669	IF ( simulated_time >= skip_time_data_output_av ) THEN
	670	time_do_av = time_do_av + dt_3d
	671	ENDIF
	672	IF ( simulated_time >= skip_time_do2d_xy ) THEN
	673	time_do2d_xy = time_do2d_xy + dt_3d
	674	ENDIF
	675	IF ( simulated_time >= skip_time_do2d_xz ) THEN
	676	time_do2d_xz = time_do2d_xz + dt_3d
	677	ENDIF
	678	IF ( simulated_time >= skip_time_do2d_yz ) THEN
	679	time_do2d_yz = time_do2d_yz + dt_3d
	680	ENDIF
	681	IF ( simulated_time >= skip_time_do3d ) THEN
	682	time_do3d = time_do3d + dt_3d
	683	ENDIF
[410]	684	DO mid = 1, masks
	685	IF ( simulated_time >= skip_time_domask(mid) ) THEN
	686	time_domask(mid)= time_domask(mid) + dt_3d
	687	ENDIF
	688	ENDDO
[1]	689	time_dvrp = time_dvrp + dt_3d
	690	IF ( simulated_time >= skip_time_dosp ) THEN
	691	time_dosp = time_dosp + dt_3d
	692	ENDIF
	693	time_dots = time_dots + dt_3d
[849]	694	IF ( .NOT. first_call_lpm ) THEN
[1]	695	time_dopts = time_dopts + dt_3d
	696	ENDIF
	697	IF ( simulated_time >= skip_time_dopr ) THEN
	698	time_dopr = time_dopr + dt_3d
	699	ENDIF
	700	time_dopr_listing = time_dopr_listing + dt_3d
	701	time_run_control = time_run_control + dt_3d
	702
	703	!
[102]	704	!-- Data exchange between coupled models
[291]	705	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[102]	706	time_coupling = time_coupling + dt_3d
[343]	707
[108]	708	!
	709	!-- In case of model termination initiated by the local model
	710	!-- (terminate_coupled > 0), the coupler must be skipped because it would
	711	!-- cause an MPI intercomminucation hang.
	712	!-- If necessary, the coupler will be called at the beginning of the
	713	!-- next restart run.
	714	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
[102]	715	CALL surface_coupler
	716	time_coupling = time_coupling - dt_coupling
	717	ENDDO
	718	ENDIF
	719
	720	!
[46]	721	!-- Execute user-defined actions
	722	CALL user_actions( 'after_integration' )
	723
	724	!
[1]	725	!-- If Galilei transformation is used, determine the distance that the
	726	!-- model has moved so far
	727	IF ( galilei_transformation ) THEN
	728	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
	729	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
	730	ENDIF
	731
	732	!
	733	!-- Check, if restart is necessary (because cpu-time is expiring or
	734	!-- because it is forced by user) and set stop flag
[108]	735	!-- This call is skipped if the remote model has already initiated a restart.
	736	IF ( .NOT. terminate_run ) CALL check_for_restart
[1]	737
	738	!
	739	!-- Carry out statistical analysis and output at the requested output times.
	740	!-- The MOD function is used for calculating the output time counters (like
	741	!-- time_dopr) in order to regard a possible decrease of the output time
	742	!-- interval in case of restart runs
	743
	744	!
	745	!-- Set a flag indicating that so far no statistics have been created
	746	!-- for this time step
	747	flow_statistics_called = .FALSE.
	748
	749	!
	750	!-- If required, call flow_statistics for averaging in time
[1342]	751	IF ( averaging_interval_pr /= 0.0_wp .AND. &
[1]	752	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
	753	simulated_time >= skip_time_dopr ) THEN
	754	time_dopr_av = time_dopr_av + dt_3d
	755	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
	756	do_sum = .TRUE.
	757	time_dopr_av = MOD( time_dopr_av, &
	758	MAX( dt_averaging_input_pr, dt_3d ) )
	759	ENDIF
	760	ENDIF
	761	IF ( do_sum ) CALL flow_statistics
	762
	763	!
[410]	764	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
[1342]	765	IF ( averaging_interval /= 0.0_wp .AND. &
[1]	766	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
	767	simulated_time >= skip_time_data_output_av ) &
	768	THEN
	769	time_do_sla = time_do_sla + dt_3d
	770	IF ( time_do_sla >= dt_averaging_input ) THEN
	771	CALL sum_up_3d_data
	772	average_count_3d = average_count_3d + 1
	773	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
	774	ENDIF
	775	ENDIF
	776
	777	!
	778	!-- Calculate spectra for time averaging
[1342]	779	IF ( averaging_interval_sp /= 0.0_wp .AND. &
[1]	780	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
	781	simulated_time >= skip_time_dosp ) THEN
	782	time_dosp_av = time_dosp_av + dt_3d
	783	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
	784	CALL calc_spectra
	785	time_dosp_av = MOD( time_dosp_av, &
	786	MAX( dt_averaging_input_pr, dt_3d ) )
	787	ENDIF
	788	ENDIF
	789
	790	!
	791	!-- Computation and output of run control parameters.
[1001]	792	!-- This is also done whenever perturbations have been imposed
[1]	793	IF ( time_run_control >= dt_run_control .OR. &
[1001]	794	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
[1]	795	THEN
	796	CALL run_control
	797	IF ( time_run_control >= dt_run_control ) THEN
	798	time_run_control = MOD( time_run_control, &
	799	MAX( dt_run_control, dt_3d ) )
	800	ENDIF
	801	ENDIF
	802
	803	!
	804	!-- Profile output (ASCII) on file
	805	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
	806	CALL print_1d
	807	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
	808	dt_3d ) )
	809	ENDIF
	810
	811	!
	812	!-- Graphic output for PROFIL
	813	IF ( time_dopr >= dt_dopr ) THEN
	814	IF ( dopr_n /= 0 ) CALL data_output_profiles
	815	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
[1342]	816	time_dopr_av = 0.0_wp ! due to averaging (see above)
[1]	817	ENDIF
	818
	819	!
	820	!-- Graphic output for time series
	821	IF ( time_dots >= dt_dots ) THEN
[48]	822	CALL data_output_tseries
[1]	823	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
	824	ENDIF
	825
	826	!
	827	!-- Output of spectra (formatted for use with PROFIL), in case of no
	828	!-- time averaging, spectra has to be calculated before
	829	IF ( time_dosp >= dt_dosp ) THEN
	830	IF ( average_count_sp == 0 ) CALL calc_spectra
	831	CALL data_output_spectra
	832	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
	833	ENDIF
	834
	835	!
	836	!-- 2d-data output (cross-sections)
	837	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
	838	CALL data_output_2d( 'xy', 0 )
	839	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
	840	ENDIF
	841	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
	842	CALL data_output_2d( 'xz', 0 )
	843	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
	844	ENDIF
	845	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
	846	CALL data_output_2d( 'yz', 0 )
	847	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
	848	ENDIF
	849
	850	!
	851	!-- 3d-data output (volume data)
	852	IF ( time_do3d >= dt_do3d ) THEN
	853	CALL data_output_3d( 0 )
	854	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
	855	ENDIF
	856
	857	!
[410]	858	!-- masked data output
[1308]	859	!-- Parallel netcdf output is not tested so far for masked data, hence
	860	!-- netcdf_data_format is switched back to non-paralell output.
	861	netcdf_data_format_save = netcdf_data_format
	862	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	863	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	864	DO mid = 1, masks
	865	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
	866	CALL data_output_mask( 0 )
	867	time_domask(mid) = MOD( time_domask(mid), &
	868	MAX( dt_domask(mid), dt_3d ) )
	869	ENDIF
	870	ENDDO
[1308]	871	netcdf_data_format = netcdf_data_format_save
[410]	872
	873	!
	874	!-- Output of time-averaged 2d/3d/masked data
[1]	875	IF ( time_do_av >= dt_data_output_av ) THEN
	876	CALL average_3d_data
	877	CALL data_output_2d( 'xy', 1 )
	878	CALL data_output_2d( 'xz', 1 )
	879	CALL data_output_2d( 'yz', 1 )
	880	CALL data_output_3d( 1 )
[1308]	881	!-- Parallel netcdf output is not tested so far for masked data, hence
	882	!-- netcdf_data_format is switched back to non-paralell output.
	883	netcdf_data_format_save = netcdf_data_format
	884	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	885	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	886	DO mid = 1, masks
	887	CALL data_output_mask( 1 )
	888	ENDDO
[1308]	889	netcdf_data_format = netcdf_data_format_save
[1]	890	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
	891	ENDIF
	892
	893	!
	894	!-- Output of particle time series
[253]	895	IF ( particle_advection ) THEN
	896	IF ( time_dopts >= dt_dopts .OR. &
	897	( simulated_time >= particle_advection_start .AND. &
[849]	898	first_call_lpm ) ) THEN
[253]	899	CALL data_output_ptseries
	900	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
	901	ENDIF
[1]	902	ENDIF
	903
	904	!
	905	!-- Output of dvrp-graphics (isosurface, particles, slicer)
	906	#if defined( __dvrp_graphics )
	907	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
	908	#endif
	909	IF ( time_dvrp >= dt_dvrp ) THEN
	910	CALL data_output_dvrp
	911	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
	912	ENDIF
	913	#if defined( __dvrp_graphics )
	914	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	915	#endif
	916
	917	!
	918	!-- If required, set the heat flux for the next time step at a random value
	919	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
	920
	921	!
	922	!-- Execute user-defined actions
	923	CALL user_actions( 'after_timestep' )
	924
	925	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
	926
[667]	927
[1]	928	ENDDO ! time loop
	929
	930	#if defined( __dvrp_graphics )
	931	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
	932	#endif
	933
	934	END SUBROUTINE time_integration

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