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source: palm/trunk/SOURCE/time_integration.f90 @ 1496

Last change on this file since 1496 was 1496, checked in by maronga, 9 years ago
added beta version of a land surface model and a simple radiation model for clear sky conditions
Property svn:keywords set to `Id`
File size: 38.9 KB

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

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