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source: palm/trunk/SOURCE/time_integration.f90 @ 1614

Last change on this file since 1614 was 1586, checked in by maronga, 9 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	!
[1586]	23	!
[1366]	24	! Former revisions:
	25	! -----------------
	26	! $Id: time_integration.f90 1586 2015-04-30 07:11:33Z maronga $
	27	!
[1586]	28	! 1585 2015-04-30 07:05:52Z maronga
	29	! Moved call of radiation scheme. Added support for RRTM
	30	!
[1552]	31	! 1551 2015-03-03 14:18:16Z maronga
	32	! Added interface for different radiation schemes.
	33	!
[1497]	34	! 1496 2014-12-02 17:25:50Z maronga
	35	! Added calls for the land surface model and radiation scheme
	36	!
[1403]	37	! 1402 2014-05-09 14:25:13Z raasch
	38	! location messages modified
	39	!
[1385]	40	! 1384 2014-05-02 14:31:06Z raasch
	41	! location messages added
	42	!
[1381]	43	! 1380 2014-04-28 12:40:45Z heinze
	44	! CALL of nudge_ref added
	45	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
	46	!
[1366]	47	! 1365 2014-04-22 15:03:56Z boeske
[1365]	48	! Reset sums_ls_l to zero at each timestep
	49	! +sums_ls_l
	50	! Calculation of reference state (previously in subroutine calc_mean_profile)
	51
[1343]	52	! 1342 2014-03-26 17:04:47Z kanani
	53	! REAL constants defined as wp-kind
	54	!
[1321]	55	! 1320 2014-03-20 08:40:49Z raasch
[1320]	56	! ONLY-attribute added to USE-statements,
	57	! kind-parameters added to all INTEGER and REAL declaration statements,
	58	! kinds are defined in new module kinds,
	59	! old module precision_kind is removed,
	60	! revision history before 2012 removed,
	61	! comment fields (!:) to be used for variable explanations added to
	62	! all variable declaration statements
[1319]	63	! 1318 2014-03-17 13:35:16Z raasch
	64	! module interfaces removed
	65	!
[1309]	66	! 1308 2014-03-13 14:58:42Z fricke
	67	! +netcdf_data_format_save
	68	! For masked data, parallel netcdf output is not tested so far, hence
	69	! netcdf_data_format is switched back to non-paralell output.
	70	!
[1277]	71	! 1276 2014-01-15 13:40:41Z heinze
	72	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
	73	!
[1258]	74	! 1257 2013-11-08 15:18:40Z raasch
	75	! acc-update-host directive for timestep removed
	76	!
[1242]	77	! 1241 2013-10-30 11:36:58Z heinze
	78	! Generalize calc_mean_profile for wider use
	79	! Determine shf and qsws in dependence on data from LSF_DATA
	80	! Determine ug and vg in dependence on data from LSF_DATA
[1222]	81	! 1221 2013-09-10 08:59:13Z raasch
	82	! host update of arrays before timestep is called
	83	!
[1182]	84	! 1179 2013-06-14 05:57:58Z raasch
	85	! mean profiles for reference state are only calculated if required,
	86	! small bugfix for background communication
	87	!
[1172]	88	! 1171 2013-05-30 11:27:45Z raasch
	89	! split of prognostic_equations deactivated (comment lines), for the time being
	90	!
[1132]	91	! 1128 2013-04-12 06:19:32Z raasch
[1128]	92	! asynchronous transfer of ghost point data realized for acc-optimized version:
	93	! prognostic_equations are first called two times for those points required for
	94	! the left-right and north-south exchange, respectively, and then for the
	95	! remaining points,
	96	! those parts requiring global communication moved from prognostic_equations to
	97	! here
[392]	98	!
[1116]	99	! 1115 2013-03-26 18:16:16Z hoffmann
	100	! calculation of qr and nr is restricted to precipitation
	101	!
[1114]	102	! 1113 2013-03-10 02:48:14Z raasch
	103	! GPU-porting of boundary conditions,
	104	! openACC directives updated
	105	! formal parameter removed from routine boundary_conds
	106	!
[1112]	107	! 1111 2013-03-08 23:54:10Z raasch
	108	! +internal timestep counter for cpu statistics added,
	109	! openACC directives updated
	110	!
[1093]	111	! 1092 2013-02-02 11:24:22Z raasch
	112	! unused variables removed
	113	!
[1066]	114	! 1065 2012-11-22 17:42:36Z hoffmann
	115	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
	116	!
[1054]	117	! 1053 2012-11-13 17:11:03Z hoffmann
	118	! exchange of ghost points for nr, qr added
	119	!
[1037]	120	! 1036 2012-10-22 13:43:42Z raasch
	121	! code put under GPL (PALM 3.9)
	122	!
[1020]	123	! 1019 2012-09-28 06:46:45Z raasch
	124	! non-optimized version of prognostic_equations removed
	125	!
[1017]	126	! 1015 2012-09-27 09:23:24Z raasch
	127	! +call of prognostic_equations_acc
	128	!
[1002]	129	! 1001 2012-09-13 14:08:46Z raasch
	130	! all actions concerning leapfrog- and upstream-spline-scheme removed
	131	!
[850]	132	! 849 2012-03-15 10:35:09Z raasch
	133	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
	134	!
[826]	135	! 825 2012-02-19 03:03:44Z raasch
	136	! wang_collision_kernel renamed wang_kernel
	137	!
[1]	138	! Revision 1.1 1997/08/11 06:19:04 raasch
	139	! Initial revision
	140	!
	141	!
	142	! Description:
	143	! ------------
	144	! Integration in time of the model equations, statistical analysis and graphic
	145	! output
	146	!------------------------------------------------------------------------------!
	147
[1320]	148	USE advec_ws, &
	149	ONLY: ws_statistics
	150
	151	USE arrays_3d, &
[1380]	152	ONLY: diss, dzu, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, ql, &
	153	ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, u, &
	154	u_p, v, vpt, v_p, w_p
[1320]	155
[1365]	156	USE calc_mean_profile_mod, &
[1320]	157	ONLY: calc_mean_profile
	158
	159	USE control_parameters, &
	160	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
	161	average_count_sp, averaging_interval, averaging_interval_pr, &
[1380]	162	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
	163	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
	164	cloud_physics, constant_heatflux, create_disturbances, dopr_n, &
[1320]	165	constant_diffusion, coupling_mode, coupling_start_time, &
	166	current_timestep_number, disturbance_created, &
	167	disturbance_energy_limit, dist_range, do_sum, dt_3d, &
	168	dt_averaging_input, dt_averaging_input_pr, dt_coupling, &
	169	dt_data_output_av, dt_disturb, dt_do2d_xy, dt_do2d_xz, &
	170	dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
	171	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
	172	end_time, first_call_lpm, galilei_transformation, humidity, &
	173	icloud_scheme, intermediate_timestep_count, &
	174	intermediate_timestep_count_max, large_scale_forcing, &
	175	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
[1365]	176	netcdf_data_format, neutral, nr_timesteps_this_run, nudging, &
	177	ocean, on_device, passive_scalar, prandtl_layer, precipitation, &
[1320]	178	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
	179	run_coupled, simulated_time, simulated_time_chr, &
	180	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
	181	skip_time_do3d, skip_time_domask, skip_time_dopr, &
	182	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
	183	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
	184	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
	185	time_do3d, time_domask, time_dopr, time_dopr_av, &
	186	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
	187	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
[1496]	188	time_run_control, time_since_reference_point, &
	189	turbulence, &
[1320]	190	turbulent_inflow, use_initial_profile_as_reference, &
	191	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
	192	ws_scheme_sca
	193
	194	USE cpulog, &
	195	ONLY: cpu_log, log_point, log_point_s
	196
	197	USE indices, &
	198	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
[1380]	199	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
[1320]	200
	201	USE interaction_droplets_ptq_mod, &
	202	ONLY: interaction_droplets_ptq
	203
	204	USE kinds
	205
[1496]	206	USE land_surface_model_mod, &
	207	ONLY: land_surface, lsm_energy_balance, lsm_soil_model
	208
[1320]	209	USE ls_forcing_mod, &
	210	ONLY: ls_forcing_surf, ls_forcing_vert
	211
[1365]	212	USE nudge_mod, &
[1380]	213	ONLY: calc_tnudge, nudge_ref
[1365]	214
[1320]	215	USE particle_attributes, &
	216	ONLY: particle_advection, particle_advection_start, wang_kernel
	217
[1]	218	USE pegrid
	219
[1320]	220	USE production_e_mod, &
	221	ONLY: production_e_init
	222
[1402]	223	USE progress_bar, &
	224	ONLY: finish_progress_bar, output_progress_bar
	225
[1320]	226	USE prognostic_equations_mod, &
	227	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
	228	prognostic_equations_vector
	229
[1496]	230	USE radiation_model_mod, &
[1585]	231	ONLY: dt_radiation, radiation, radiation_clearsky, &
	232	radiation_rrtmg, radiation_scheme, time_radiation
[1496]	233
[1320]	234	USE statistics, &
[1365]	235	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
[1320]	236
	237	USE user_actions_mod, &
	238	ONLY: user_actions
	239
[1]	240	IMPLICIT NONE
	241
[1320]	242	CHARACTER (LEN=9) :: time_to_string !:
[1]	243
[1320]	244	INTEGER(iwp) :: netcdf_data_format_save !:
	245
[1]	246	!
	247	!-- At the beginning of a simulation determine the time step as well as
	248	!-- determine and print out the run control parameters
[1342]	249	IF ( simulated_time == 0.0_wp ) CALL timestep
[667]	250
[1]	251	CALL run_control
	252
[667]	253
[108]	254	!
	255	!-- Data exchange between coupled models in case that a call has been omitted
	256	!-- at the end of the previous run of a job chain.
[291]	257	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[108]	258	!
	259	!-- In case of model termination initiated by the local model the coupler
	260	!-- must not be called because this would again cause an MPI hang.
	261	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
	262	CALL surface_coupler
	263	time_coupling = time_coupling - dt_coupling
	264	ENDDO
[1342]	265	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
[348]	266	THEN
	267	time_coupling = time_since_reference_point
	268	ENDIF
[108]	269	ENDIF
	270
	271
[1]	272	#if defined( __dvrp_graphics )
	273	!
	274	!-- Time measurement with dvrp software
	275	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	276	#endif
	277
[1402]	278	CALL location_message( 'start with time-stepping', .TRUE. )
[1]	279	!
	280	!-- Start of the time loop
	281	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
	282	.NOT. terminate_run )
	283
	284	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
[1221]	285
[1]	286	!
	287	!-- Determine size of next time step
[1342]	288	IF ( simulated_time /= 0.0_wp ) THEN
[1221]	289	CALL timestep
	290	ENDIF
	291
[1]	292	!
[1241]	293	!-- Determine ug, vg and w_subs in dependence on data from external file
	294	!-- LSF_DATA
[1365]	295	IF ( large_scale_forcing .AND. lsf_vert ) THEN
[1241]	296	CALL ls_forcing_vert ( simulated_time )
[1365]	297	sums_ls_l = 0.0_wp
[1241]	298	ENDIF
	299
	300	!
[1380]	301	!-- Set pt_init and q_init to the current profiles taken from
	302	!-- NUDGING_DATA
	303	IF ( nudging ) THEN
	304	CALL nudge_ref ( simulated_time )
	305	!
	306	!-- Store temperature gradient at the top boundary for possible Neumann
	307	!-- boundary condition
	308	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
	309	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
	310	ENDIF
	311
	312	!
[1]	313	!-- Execute the user-defined actions
	314	CALL user_actions( 'before_timestep' )
	315
	316	!
	317	!-- Start of intermediate step loop
	318	intermediate_timestep_count = 0
	319	DO WHILE ( intermediate_timestep_count < &
	320	intermediate_timestep_count_max )
	321
	322	intermediate_timestep_count = intermediate_timestep_count + 1
	323
	324	!
	325	!-- Set the steering factors for the prognostic equations which depend
	326	!-- on the timestep scheme
	327	CALL timestep_scheme_steering
	328
	329	!
[1128]	330	!-- Calculate those variables needed in the tendency terms which need
	331	!-- global communication
[1179]	332	IF ( .NOT. use_single_reference_value .AND. &
	333	.NOT. use_initial_profile_as_reference ) THEN
	334	!
	335	!-- Horizontally averaged profiles to be used as reference state in
	336	!-- buoyancy terms (WARNING: only the respective last call of
	337	!-- calc_mean_profile defines the reference state!)
[1365]	338	IF ( .NOT. neutral ) THEN
	339	CALL calc_mean_profile( pt, 4 )
	340	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
	341	ENDIF
	342	IF ( ocean ) THEN
	343	CALL calc_mean_profile( rho, 64 )
	344	ref_state(:) = hom(:,1,64,0)
	345	ENDIF
	346	IF ( humidity ) THEN
	347	CALL calc_mean_profile( vpt, 44 )
	348	ref_state(:) = hom(:,1,44,0)
	349	ENDIF
	350
[1179]	351	ENDIF
	352
[1128]	353	IF ( .NOT. constant_diffusion ) CALL production_e_init
	354	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
	355	intermediate_timestep_count == 1 ) CALL ws_statistics
[1365]	356	!
	357	!-- In case of nudging calculate current nudging time scale and horizontal
[1380]	358	!-- means of u, v, pt and q
[1365]	359	IF ( nudging ) THEN
	360	CALL calc_tnudge( simulated_time )
	361	CALL calc_mean_profile( u, 1 )
	362	CALL calc_mean_profile( v, 2 )
	363	CALL calc_mean_profile( pt, 4 )
	364	CALL calc_mean_profile( q, 41 )
	365	ENDIF
[1128]	366
[1585]	367	IF ( radiation .AND. intermediate_timestep_count &
	368	== intermediate_timestep_count_max ) THEN
	369
	370	time_radiation = time_radiation + dt_3d
	371
	372	IF ( time_radiation >= dt_radiation ) THEN
	373
	374	CALL cpu_log( log_point(50), 'radiation', 'start' )
	375
	376	time_radiation = time_radiation - dt_radiation
	377	IF ( radiation_scheme == 'clear-sky' ) THEN
	378	CALL radiation_clearsky
	379	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
	380	CALL radiation_rrtmg
	381	ENDIF
	382
	383	CALL cpu_log( log_point(50), 'radiation', 'stop' )
	384	ENDIF
	385	ENDIF
[1128]	386	!
[1]	387	!-- Solve the prognostic equations. A fast cache optimized version with
	388	!-- only one single loop is used in case of Piascek-Williams advection
	389	!-- scheme. NEC vector machines use a different version, because
	390	!-- in the other versions a good vectorization is prohibited due to
	391	!-- inlining problems.
[1019]	392	IF ( loop_optimization == 'cache' ) THEN
	393	CALL prognostic_equations_cache
	394	ELSEIF ( loop_optimization == 'vector' ) THEN
[63]	395	CALL prognostic_equations_vector
[1015]	396	ELSEIF ( loop_optimization == 'acc' ) THEN
[1171]	397	i_left = nxl; i_right = nxr
	398	j_south = nys; j_north = nyn
	399	CALL prognostic_equations_acc
	400
	401	! i_left = nxl; i_right = nxl+nbgp-1
[1128]	402	! j_south = nys; j_north = nyn
	403	! CALL prognostic_equations_acc
[1171]	404	! i_left = nxr-nbgp+1; i_right = nxr
	405	! j_south = nys; j_north = nyn
	406	! CALL prognostic_equations_acc
[1128]	407
	408	!
	409	!-- Exchange of ghost points (lateral boundary conditions)
	410	IF ( background_communication ) THEN
	411
	412	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
	413
	414	send_receive = 'lr'
	415	sendrecv_in_background = .TRUE.
	416	req = 0
	417	req_count = 0
	418
	419	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	420	on_device = .TRUE. ! to be removed after complete porting
	421	ELSE ! of ghost point exchange
	422	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	423	ENDIF
	424
	425	CALL exchange_horiz( u_p, nbgp )
	426	CALL exchange_horiz( v_p, nbgp )
	427	CALL exchange_horiz( w_p, nbgp )
	428	CALL exchange_horiz( pt_p, nbgp )
	429	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	430	IF ( ocean ) THEN
	431	CALL exchange_horiz( sa_p, nbgp )
	432	CALL exchange_horiz( rho, nbgp )
	433	CALL exchange_horiz( prho, nbgp )
	434	ENDIF
	435	IF (humidity .OR. passive_scalar) THEN
	436	CALL exchange_horiz( q_p, nbgp )
	437	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	438	CALL exchange_horiz( qr_p, nbgp )
	439	CALL exchange_horiz( nr_p, nbgp )
	440	ENDIF
	441	ENDIF
	442	IF ( cloud_droplets ) THEN
	443	CALL exchange_horiz( ql, nbgp )
	444	CALL exchange_horiz( ql_c, nbgp )
	445	CALL exchange_horiz( ql_v, nbgp )
	446	CALL exchange_horiz( ql_vp, nbgp )
	447	ENDIF
	448	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	449
	450	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	451	on_device = .FALSE. ! to be removed after complete porting
	452	ELSE ! of ghost point exchange
	453	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	454	ENDIF
	455
	456	sendrecv_in_background = .FALSE.
	457
	458	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
	459
	460	ENDIF
	461
[1171]	462	! i_left = nxl+nbgp; i_right = nxr-nbgp
	463	! j_south = nys; j_north = nys+nbgp-1
	464	! CALL prognostic_equations_acc
	465	! i_left = nxl+nbgp; i_right = nxr-nbgp
	466	! j_south = nyn-nbgp+1; j_north = nyn
	467	! CALL prognostic_equations_acc
[1128]	468
	469	IF ( background_communication ) THEN
	470	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
	471	#if defined( __parallel )
	472	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	473	#endif
	474	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
	475
	476	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
	477
	478	send_receive = 'ns'
	479	sendrecv_in_background = .TRUE.
	480	req = 0
	481	req_count = 0
	482
	483	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	484	on_device = .TRUE. ! to be removed after complete porting
	485	ELSE ! of ghost point exchange
	486	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	487	ENDIF
	488
	489	CALL exchange_horiz( u_p, nbgp )
	490	CALL exchange_horiz( v_p, nbgp )
	491	CALL exchange_horiz( w_p, nbgp )
	492	CALL exchange_horiz( pt_p, nbgp )
	493	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	494	IF ( ocean ) THEN
	495	CALL exchange_horiz( sa_p, nbgp )
	496	CALL exchange_horiz( rho, nbgp )
	497	CALL exchange_horiz( prho, nbgp )
	498	ENDIF
	499	IF (humidity .OR. passive_scalar) THEN
	500	CALL exchange_horiz( q_p, nbgp )
	501	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	502	CALL exchange_horiz( qr_p, nbgp )
	503	CALL exchange_horiz( nr_p, nbgp )
	504	ENDIF
	505	ENDIF
	506	IF ( cloud_droplets ) THEN
	507	CALL exchange_horiz( ql, nbgp )
	508	CALL exchange_horiz( ql_c, nbgp )
	509	CALL exchange_horiz( ql_v, nbgp )
	510	CALL exchange_horiz( ql_vp, nbgp )
	511	ENDIF
	512	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	513
	514	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	515	on_device = .FALSE. ! to be removed after complete porting
	516	ELSE ! of ghost point exchange
	517	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	518	ENDIF
	519
	520	sendrecv_in_background = .FALSE.
	521
	522	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	523
	524	ENDIF
	525
[1171]	526	! i_left = nxl+nbgp; i_right = nxr-nbgp
	527	! j_south = nys+nbgp; j_north = nyn-nbgp
	528	! CALL prognostic_equations_acc
[1128]	529
	530	IF ( background_communication ) THEN
	531	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
	532	#if defined( __parallel )
	533	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	534	#endif
	535	send_receive = 'al'
	536	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
	537	ENDIF
	538
[1]	539	ENDIF
	540
	541	!
[849]	542	!-- Particle transport/physics with the Lagrangian particle model
	543	!-- (only once during intermediate steps, because it uses an Euler-step)
[1128]	544	!-- ### particle model should be moved before prognostic_equations, in order
	545	!-- to regard droplet interactions directly
[63]	546	IF ( particle_advection .AND. &
	547	simulated_time >= particle_advection_start .AND. &
[1]	548	intermediate_timestep_count == 1 ) THEN
[849]	549	CALL lpm
	550	first_call_lpm = .FALSE.
[1]	551	ENDIF
	552
	553	!
	554	!-- Interaction of droplets with temperature and specific humidity.
	555	!-- Droplet condensation and evaporation is calculated within
	556	!-- advec_particles.
	557	IF ( cloud_droplets .AND. &
	558	intermediate_timestep_count == intermediate_timestep_count_max )&
	559	THEN
	560	CALL interaction_droplets_ptq
	561	ENDIF
	562
	563	!
	564	!-- Exchange of ghost points (lateral boundary conditions)
[1128]	565	IF ( .NOT. background_communication ) THEN
[1113]	566
[1128]	567	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
[1113]	568
[1128]	569	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	570	on_device = .TRUE. ! to be removed after complete porting
	571	ELSE ! of ghost point exchange
	572	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
[1053]	573	ENDIF
[1]	574
[1128]	575	CALL exchange_horiz( u_p, nbgp )
	576	CALL exchange_horiz( v_p, nbgp )
	577	CALL exchange_horiz( w_p, nbgp )
	578	CALL exchange_horiz( pt_p, nbgp )
	579	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	580	IF ( ocean ) THEN
	581	CALL exchange_horiz( sa_p, nbgp )
	582	CALL exchange_horiz( rho, nbgp )
	583	CALL exchange_horiz( prho, nbgp )
	584	ENDIF
	585	IF (humidity .OR. passive_scalar) THEN
	586	CALL exchange_horiz( q_p, nbgp )
[1179]	587	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	588	precipitation ) THEN
[1128]	589	CALL exchange_horiz( qr_p, nbgp )
	590	CALL exchange_horiz( nr_p, nbgp )
	591	ENDIF
	592	ENDIF
	593	IF ( cloud_droplets ) THEN
	594	CALL exchange_horiz( ql, nbgp )
	595	CALL exchange_horiz( ql_c, nbgp )
	596	CALL exchange_horiz( ql_v, nbgp )
	597	CALL exchange_horiz( ql_vp, nbgp )
	598	ENDIF
	599	IF ( wang_kernel .OR. turbulence ) CALL exchange_horiz( diss, nbgp )
	600
	601	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	602	on_device = .FALSE. ! to be removed after complete porting
	603	ELSE ! of ghost point exchange
	604	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	605	ENDIF
	606
	607	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	608
[1113]	609	ENDIF
	610
[1]	611	!
	612	!-- Boundary conditions for the prognostic quantities (except of the
	613	!-- velocities at the outflow in case of a non-cyclic lateral wall)
[1113]	614	CALL boundary_conds
[1]	615
	616	!
[1496]	617	!-- When using the land surface model:
	618	!-- 1) solve energy balance equation to calculate new skin temperature
	619	!-- 2) run soil model
	620	IF ( land_surface ) THEN
	621
	622	CALL cpu_log( log_point(54), 'land_surface', 'start' )
	623
	624	CALL lsm_energy_balance
	625	CALL lsm_soil_model
	626
	627	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
	628
	629	ENDIF
	630
	631	!
[73]	632	!-- Swap the time levels in preparation for the next time step.
	633	CALL swap_timelevel
	634
	635	!
[1]	636	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
	637	!-- when a sloping surface is used
	638	IF ( sloping_surface ) THEN
[707]	639	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
	640	pt_slope_offset
	641	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
	642	pt_slope_offset
[1]	643	ENDIF
	644
	645	!
[151]	646	!-- Impose a turbulent inflow using the recycling method
	647	IF ( turbulent_inflow ) CALL inflow_turbulence
	648
	649	!
[1]	650	!-- Impose a random perturbation on the horizontal velocity field
[106]	651	IF ( create_disturbances .AND. &
	652	( call_psolver_at_all_substeps .AND. &
[1]	653	intermediate_timestep_count == intermediate_timestep_count_max )&
[106]	654	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
	655	intermediate_timestep_count == 1 ) ) &
[1]	656	THEN
	657	time_disturb = time_disturb + dt_3d
	658	IF ( time_disturb >= dt_disturb ) THEN
[1111]	659	!$acc update host( u, v )
[1113]	660	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
[87]	661	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
[75]	662	CALL disturb_field( nzb_u_inner, tend, u )
	663	CALL disturb_field( nzb_v_inner, tend, v )
[707]	664	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
[1]	665	!
	666	!-- Runs with a non-cyclic lateral wall need perturbations
	667	!-- near the inflow throughout the whole simulation
	668	dist_range = 1
[75]	669	CALL disturb_field( nzb_u_inner, tend, u )
	670	CALL disturb_field( nzb_v_inner, tend, v )
[1]	671	dist_range = 0
	672	ENDIF
[1113]	673	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
[1111]	674	!$acc update device( u, v )
[1]	675	time_disturb = time_disturb - dt_disturb
	676	ENDIF
	677	ENDIF
	678
	679	!
	680	!-- Reduce the velocity divergence via the equation for perturbation
	681	!-- pressure.
[106]	682	IF ( intermediate_timestep_count == 1 .OR. &
	683	call_psolver_at_all_substeps ) THEN
[1]	684	CALL pres
	685	ENDIF
	686
	687	!
	688	!-- If required, compute liquid water content
[1015]	689	IF ( cloud_physics ) THEN
	690	CALL calc_liquid_water_content
	691	!$acc update device( ql )
	692	ENDIF
[1115]	693	!
	694	!-- If required, compute virtual potential temperature
	695	IF ( humidity ) THEN
	696	CALL compute_vpt
	697	!$acc update device( vpt )
	698	ENDIF
[1585]	699
[1]	700	!
	701	!-- Compute the diffusion quantities
	702	IF ( .NOT. constant_diffusion ) THEN
	703
	704	!
[1276]	705	!-- Determine surface fluxes shf and qsws and surface values
	706	!-- pt_surface and q_surface in dependence on data from external
	707	!-- file LSF_DATA respectively
	708	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
	709	intermediate_timestep_count == intermediate_timestep_count_max )&
	710	THEN
	711	CALL ls_forcing_surf ( simulated_time )
	712	ENDIF
	713
	714	!
[1]	715	!-- First the vertical fluxes in the Prandtl layer are being computed
	716	IF ( prandtl_layer ) THEN
	717	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
	718	CALL prandtl_fluxes
	719	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
	720	ENDIF
[1241]	721
[1]	722	!
	723	!-- Compute the diffusion coefficients
	724	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
[75]	725	IF ( .NOT. humidity ) THEN
[97]	726	IF ( ocean ) THEN
[388]	727	CALL diffusivities( prho, prho_reference )
[97]	728	ELSE
	729	CALL diffusivities( pt, pt_reference )
	730	ENDIF
[1]	731	ELSE
[97]	732	CALL diffusivities( vpt, pt_reference )
[1]	733	ENDIF
	734	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
	735
	736	ENDIF
	737
	738	ENDDO ! Intermediate step loop
	739
	740	!
	741	!-- Increase simulation time and output times
[1111]	742	nr_timesteps_this_run = nr_timesteps_this_run + 1
[291]	743	current_timestep_number = current_timestep_number + 1
	744	simulated_time = simulated_time + dt_3d
	745	simulated_time_chr = time_to_string( simulated_time )
	746	time_since_reference_point = simulated_time - coupling_start_time
	747
[1]	748	IF ( simulated_time >= skip_time_data_output_av ) THEN
	749	time_do_av = time_do_av + dt_3d
	750	ENDIF
	751	IF ( simulated_time >= skip_time_do2d_xy ) THEN
	752	time_do2d_xy = time_do2d_xy + dt_3d
	753	ENDIF
	754	IF ( simulated_time >= skip_time_do2d_xz ) THEN
	755	time_do2d_xz = time_do2d_xz + dt_3d
	756	ENDIF
	757	IF ( simulated_time >= skip_time_do2d_yz ) THEN
	758	time_do2d_yz = time_do2d_yz + dt_3d
	759	ENDIF
	760	IF ( simulated_time >= skip_time_do3d ) THEN
	761	time_do3d = time_do3d + dt_3d
	762	ENDIF
[410]	763	DO mid = 1, masks
	764	IF ( simulated_time >= skip_time_domask(mid) ) THEN
	765	time_domask(mid)= time_domask(mid) + dt_3d
	766	ENDIF
	767	ENDDO
[1]	768	time_dvrp = time_dvrp + dt_3d
	769	IF ( simulated_time >= skip_time_dosp ) THEN
	770	time_dosp = time_dosp + dt_3d
	771	ENDIF
	772	time_dots = time_dots + dt_3d
[849]	773	IF ( .NOT. first_call_lpm ) THEN
[1]	774	time_dopts = time_dopts + dt_3d
	775	ENDIF
	776	IF ( simulated_time >= skip_time_dopr ) THEN
	777	time_dopr = time_dopr + dt_3d
	778	ENDIF
	779	time_dopr_listing = time_dopr_listing + dt_3d
	780	time_run_control = time_run_control + dt_3d
	781
	782	!
[102]	783	!-- Data exchange between coupled models
[291]	784	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[102]	785	time_coupling = time_coupling + dt_3d
[343]	786
[108]	787	!
	788	!-- In case of model termination initiated by the local model
	789	!-- (terminate_coupled > 0), the coupler must be skipped because it would
	790	!-- cause an MPI intercomminucation hang.
	791	!-- If necessary, the coupler will be called at the beginning of the
	792	!-- next restart run.
	793	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
[102]	794	CALL surface_coupler
	795	time_coupling = time_coupling - dt_coupling
	796	ENDDO
	797	ENDIF
	798
	799	!
[46]	800	!-- Execute user-defined actions
	801	CALL user_actions( 'after_integration' )
	802
	803	!
[1]	804	!-- If Galilei transformation is used, determine the distance that the
	805	!-- model has moved so far
	806	IF ( galilei_transformation ) THEN
	807	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
	808	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
	809	ENDIF
	810
	811	!
	812	!-- Check, if restart is necessary (because cpu-time is expiring or
	813	!-- because it is forced by user) and set stop flag
[108]	814	!-- This call is skipped if the remote model has already initiated a restart.
	815	IF ( .NOT. terminate_run ) CALL check_for_restart
[1]	816
	817	!
	818	!-- Carry out statistical analysis and output at the requested output times.
	819	!-- The MOD function is used for calculating the output time counters (like
	820	!-- time_dopr) in order to regard a possible decrease of the output time
	821	!-- interval in case of restart runs
	822
	823	!
	824	!-- Set a flag indicating that so far no statistics have been created
	825	!-- for this time step
	826	flow_statistics_called = .FALSE.
	827
	828	!
	829	!-- If required, call flow_statistics for averaging in time
[1342]	830	IF ( averaging_interval_pr /= 0.0_wp .AND. &
[1]	831	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
	832	simulated_time >= skip_time_dopr ) THEN
	833	time_dopr_av = time_dopr_av + dt_3d
	834	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
	835	do_sum = .TRUE.
	836	time_dopr_av = MOD( time_dopr_av, &
	837	MAX( dt_averaging_input_pr, dt_3d ) )
	838	ENDIF
	839	ENDIF
	840	IF ( do_sum ) CALL flow_statistics
	841
	842	!
[410]	843	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
[1342]	844	IF ( averaging_interval /= 0.0_wp .AND. &
[1]	845	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
	846	simulated_time >= skip_time_data_output_av ) &
	847	THEN
	848	time_do_sla = time_do_sla + dt_3d
	849	IF ( time_do_sla >= dt_averaging_input ) THEN
	850	CALL sum_up_3d_data
	851	average_count_3d = average_count_3d + 1
	852	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
	853	ENDIF
	854	ENDIF
	855
	856	!
	857	!-- Calculate spectra for time averaging
[1342]	858	IF ( averaging_interval_sp /= 0.0_wp .AND. &
[1]	859	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
	860	simulated_time >= skip_time_dosp ) THEN
	861	time_dosp_av = time_dosp_av + dt_3d
	862	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
	863	CALL calc_spectra
	864	time_dosp_av = MOD( time_dosp_av, &
	865	MAX( dt_averaging_input_pr, dt_3d ) )
	866	ENDIF
	867	ENDIF
	868
	869	!
	870	!-- Computation and output of run control parameters.
[1001]	871	!-- This is also done whenever perturbations have been imposed
[1]	872	IF ( time_run_control >= dt_run_control .OR. &
[1001]	873	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
[1]	874	THEN
	875	CALL run_control
	876	IF ( time_run_control >= dt_run_control ) THEN
	877	time_run_control = MOD( time_run_control, &
	878	MAX( dt_run_control, dt_3d ) )
	879	ENDIF
	880	ENDIF
	881
	882	!
	883	!-- Profile output (ASCII) on file
	884	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
	885	CALL print_1d
	886	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
	887	dt_3d ) )
	888	ENDIF
	889
	890	!
	891	!-- Graphic output for PROFIL
	892	IF ( time_dopr >= dt_dopr ) THEN
	893	IF ( dopr_n /= 0 ) CALL data_output_profiles
	894	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
[1342]	895	time_dopr_av = 0.0_wp ! due to averaging (see above)
[1]	896	ENDIF
	897
	898	!
	899	!-- Graphic output for time series
	900	IF ( time_dots >= dt_dots ) THEN
[48]	901	CALL data_output_tseries
[1]	902	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
	903	ENDIF
	904
	905	!
	906	!-- Output of spectra (formatted for use with PROFIL), in case of no
	907	!-- time averaging, spectra has to be calculated before
	908	IF ( time_dosp >= dt_dosp ) THEN
	909	IF ( average_count_sp == 0 ) CALL calc_spectra
	910	CALL data_output_spectra
	911	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
	912	ENDIF
	913
	914	!
	915	!-- 2d-data output (cross-sections)
	916	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
	917	CALL data_output_2d( 'xy', 0 )
	918	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
	919	ENDIF
	920	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
	921	CALL data_output_2d( 'xz', 0 )
	922	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
	923	ENDIF
	924	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
	925	CALL data_output_2d( 'yz', 0 )
	926	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
	927	ENDIF
	928
	929	!
	930	!-- 3d-data output (volume data)
	931	IF ( time_do3d >= dt_do3d ) THEN
	932	CALL data_output_3d( 0 )
	933	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
	934	ENDIF
	935
	936	!
[410]	937	!-- masked data output
[1308]	938	!-- Parallel netcdf output is not tested so far for masked data, hence
	939	!-- netcdf_data_format is switched back to non-paralell output.
	940	netcdf_data_format_save = netcdf_data_format
	941	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	942	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	943	DO mid = 1, masks
	944	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
	945	CALL data_output_mask( 0 )
	946	time_domask(mid) = MOD( time_domask(mid), &
	947	MAX( dt_domask(mid), dt_3d ) )
	948	ENDIF
	949	ENDDO
[1308]	950	netcdf_data_format = netcdf_data_format_save
[410]	951
	952	!
	953	!-- Output of time-averaged 2d/3d/masked data
[1]	954	IF ( time_do_av >= dt_data_output_av ) THEN
	955	CALL average_3d_data
	956	CALL data_output_2d( 'xy', 1 )
	957	CALL data_output_2d( 'xz', 1 )
	958	CALL data_output_2d( 'yz', 1 )
	959	CALL data_output_3d( 1 )
[1308]	960	!-- Parallel netcdf output is not tested so far for masked data, hence
	961	!-- netcdf_data_format is switched back to non-paralell output.
	962	netcdf_data_format_save = netcdf_data_format
	963	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	964	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	965	DO mid = 1, masks
	966	CALL data_output_mask( 1 )
	967	ENDDO
[1308]	968	netcdf_data_format = netcdf_data_format_save
[1]	969	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
	970	ENDIF
	971
	972	!
	973	!-- Output of particle time series
[253]	974	IF ( particle_advection ) THEN
	975	IF ( time_dopts >= dt_dopts .OR. &
	976	( simulated_time >= particle_advection_start .AND. &
[849]	977	first_call_lpm ) ) THEN
[253]	978	CALL data_output_ptseries
	979	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
	980	ENDIF
[1]	981	ENDIF
	982
	983	!
	984	!-- Output of dvrp-graphics (isosurface, particles, slicer)
	985	#if defined( __dvrp_graphics )
	986	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
	987	#endif
	988	IF ( time_dvrp >= dt_dvrp ) THEN
	989	CALL data_output_dvrp
	990	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
	991	ENDIF
	992	#if defined( __dvrp_graphics )
	993	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	994	#endif
	995
	996	!
	997	!-- If required, set the heat flux for the next time step at a random value
	998	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
	999
	1000	!
	1001	!-- Execute user-defined actions
	1002	CALL user_actions( 'after_timestep' )
	1003
[1402]	1004	!
	1005	!-- Output elapsed simulated time in form of a progress bar on stdout
	1006	IF ( myid == 0 ) CALL output_progress_bar
	1007
[1]	1008	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
	1009
[667]	1010
[1]	1011	ENDDO ! time loop
	1012
[1402]	1013	IF ( myid == 0 ) CALL finish_progress_bar
	1014
[1]	1015	#if defined( __dvrp_graphics )
	1016	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
	1017	#endif
	1018
[1402]	1019	CALL location_message( 'finished time-stepping', .TRUE. )
[1384]	1020
[1]	1021	END SUBROUTINE time_integration

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