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source: palm/trunk/SOURCE/time_integration.f90 @ 1682

Last change on this file since 1682 was 1682, checked in by knoop, 9 years ago
Code annotations made doxygen readable
Property svn:keywords set to `Id`
File size: 40.1 KB

Rev	Line
[1682]	1	!> @file time_integration.f90
[1036]	2	!--------------------------------------------------------------------------------!
	3	! This file is part of PALM.
	4	!
	5	! PALM is free software: you can redistribute it and/or modify it under the terms
	6	! of the GNU General Public License as published by the Free Software Foundation,
	7	! either version 3 of the License, or (at your option) any later version.
	8	!
	9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	12	!
	13	! You should have received a copy of the GNU General Public License along with
	14	! PALM. If not, see <http://www.gnu.org/licenses/>.
	15	!
[1310]	16	! Copyright 1997-2014 Leibniz Universitaet Hannover
[1036]	17	!--------------------------------------------------------------------------------!
	18	!
[484]	19	! Current revisions:
[1092]	20	! ------------------
[1682]	21	! Code annotations made doxygen readable
[1366]	22	!
	23	! Former revisions:
	24	! -----------------
	25	! $Id: time_integration.f90 1682 2015-10-07 23:56:08Z knoop $
	26	!
[1672]	27	! 1671 2015-09-25 03:29:37Z raasch
	28	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
	29	! for particles
	30	!
[1586]	31	! 1585 2015-04-30 07:05:52Z maronga
	32	! Moved call of radiation scheme. Added support for RRTM
	33	!
[1552]	34	! 1551 2015-03-03 14:18:16Z maronga
	35	! Added interface for different radiation schemes.
	36	!
[1497]	37	! 1496 2014-12-02 17:25:50Z maronga
	38	! Added calls for the land surface model and radiation scheme
	39	!
[1403]	40	! 1402 2014-05-09 14:25:13Z raasch
	41	! location messages modified
	42	!
[1385]	43	! 1384 2014-05-02 14:31:06Z raasch
	44	! location messages added
	45	!
[1381]	46	! 1380 2014-04-28 12:40:45Z heinze
	47	! CALL of nudge_ref added
	48	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
	49	!
[1366]	50	! 1365 2014-04-22 15:03:56Z boeske
[1365]	51	! Reset sums_ls_l to zero at each timestep
	52	! +sums_ls_l
	53	! Calculation of reference state (previously in subroutine calc_mean_profile)
	54
[1343]	55	! 1342 2014-03-26 17:04:47Z kanani
	56	! REAL constants defined as wp-kind
	57	!
[1321]	58	! 1320 2014-03-20 08:40:49Z raasch
[1320]	59	! ONLY-attribute added to USE-statements,
	60	! kind-parameters added to all INTEGER and REAL declaration statements,
	61	! kinds are defined in new module kinds,
	62	! old module precision_kind is removed,
	63	! revision history before 2012 removed,
	64	! comment fields (!:) to be used for variable explanations added to
	65	! all variable declaration statements
[1319]	66	! 1318 2014-03-17 13:35:16Z raasch
	67	! module interfaces removed
	68	!
[1309]	69	! 1308 2014-03-13 14:58:42Z fricke
	70	! +netcdf_data_format_save
	71	! For masked data, parallel netcdf output is not tested so far, hence
	72	! netcdf_data_format is switched back to non-paralell output.
	73	!
[1277]	74	! 1276 2014-01-15 13:40:41Z heinze
	75	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
	76	!
[1258]	77	! 1257 2013-11-08 15:18:40Z raasch
	78	! acc-update-host directive for timestep removed
	79	!
[1242]	80	! 1241 2013-10-30 11:36:58Z heinze
	81	! Generalize calc_mean_profile for wider use
	82	! Determine shf and qsws in dependence on data from LSF_DATA
	83	! Determine ug and vg in dependence on data from LSF_DATA
[1222]	84	! 1221 2013-09-10 08:59:13Z raasch
	85	! host update of arrays before timestep is called
	86	!
[1182]	87	! 1179 2013-06-14 05:57:58Z raasch
	88	! mean profiles for reference state are only calculated if required,
	89	! small bugfix for background communication
	90	!
[1172]	91	! 1171 2013-05-30 11:27:45Z raasch
	92	! split of prognostic_equations deactivated (comment lines), for the time being
	93	!
[1132]	94	! 1128 2013-04-12 06:19:32Z raasch
[1128]	95	! asynchronous transfer of ghost point data realized for acc-optimized version:
	96	! prognostic_equations are first called two times for those points required for
	97	! the left-right and north-south exchange, respectively, and then for the
	98	! remaining points,
	99	! those parts requiring global communication moved from prognostic_equations to
	100	! here
[392]	101	!
[1116]	102	! 1115 2013-03-26 18:16:16Z hoffmann
	103	! calculation of qr and nr is restricted to precipitation
	104	!
[1114]	105	! 1113 2013-03-10 02:48:14Z raasch
	106	! GPU-porting of boundary conditions,
	107	! openACC directives updated
	108	! formal parameter removed from routine boundary_conds
	109	!
[1112]	110	! 1111 2013-03-08 23:54:10Z raasch
	111	! +internal timestep counter for cpu statistics added,
	112	! openACC directives updated
	113	!
[1093]	114	! 1092 2013-02-02 11:24:22Z raasch
	115	! unused variables removed
	116	!
[1066]	117	! 1065 2012-11-22 17:42:36Z hoffmann
	118	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
	119	!
[1054]	120	! 1053 2012-11-13 17:11:03Z hoffmann
	121	! exchange of ghost points for nr, qr added
	122	!
[1037]	123	! 1036 2012-10-22 13:43:42Z raasch
	124	! code put under GPL (PALM 3.9)
	125	!
[1020]	126	! 1019 2012-09-28 06:46:45Z raasch
	127	! non-optimized version of prognostic_equations removed
	128	!
[1017]	129	! 1015 2012-09-27 09:23:24Z raasch
	130	! +call of prognostic_equations_acc
	131	!
[1002]	132	! 1001 2012-09-13 14:08:46Z raasch
	133	! all actions concerning leapfrog- and upstream-spline-scheme removed
	134	!
[850]	135	! 849 2012-03-15 10:35:09Z raasch
	136	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
	137	!
[826]	138	! 825 2012-02-19 03:03:44Z raasch
	139	! wang_collision_kernel renamed wang_kernel
	140	!
[1]	141	! Revision 1.1 1997/08/11 06:19:04 raasch
	142	! Initial revision
	143	!
	144	!
	145	! Description:
	146	! ------------
[1682]	147	!> Integration in time of the model equations, statistical analysis and graphic
	148	!> output
[1]	149	!------------------------------------------------------------------------------!
[1682]	150	SUBROUTINE time_integration
	151
[1]	152
[1320]	153	USE advec_ws, &
	154	ONLY: ws_statistics
	155
	156	USE arrays_3d, &
[1380]	157	ONLY: diss, dzu, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, ql, &
	158	ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, u, &
	159	u_p, v, vpt, v_p, w_p
[1320]	160
[1365]	161	USE calc_mean_profile_mod, &
[1320]	162	ONLY: calc_mean_profile
	163
	164	USE control_parameters, &
	165	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
	166	average_count_sp, averaging_interval, averaging_interval_pr, &
[1380]	167	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
	168	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
	169	cloud_physics, constant_heatflux, create_disturbances, dopr_n, &
[1320]	170	constant_diffusion, coupling_mode, coupling_start_time, &
	171	current_timestep_number, disturbance_created, &
	172	disturbance_energy_limit, dist_range, do_sum, dt_3d, &
	173	dt_averaging_input, dt_averaging_input_pr, dt_coupling, &
	174	dt_data_output_av, dt_disturb, dt_do2d_xy, dt_do2d_xz, &
	175	dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
	176	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
	177	end_time, first_call_lpm, galilei_transformation, humidity, &
	178	icloud_scheme, intermediate_timestep_count, &
	179	intermediate_timestep_count_max, large_scale_forcing, &
	180	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
[1365]	181	netcdf_data_format, neutral, nr_timesteps_this_run, nudging, &
	182	ocean, on_device, passive_scalar, prandtl_layer, precipitation, &
[1320]	183	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
	184	run_coupled, simulated_time, simulated_time_chr, &
	185	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
	186	skip_time_do3d, skip_time_domask, skip_time_dopr, &
	187	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
	188	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
	189	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
	190	time_do3d, time_domask, time_dopr, time_dopr_av, &
	191	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
	192	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
[1496]	193	time_run_control, time_since_reference_point, &
	194	turbulence, &
[1320]	195	turbulent_inflow, use_initial_profile_as_reference, &
	196	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
	197	ws_scheme_sca
	198
	199	USE cpulog, &
	200	ONLY: cpu_log, log_point, log_point_s
	201
	202	USE indices, &
	203	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
[1380]	204	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
[1320]	205
	206	USE interaction_droplets_ptq_mod, &
	207	ONLY: interaction_droplets_ptq
	208
	209	USE kinds
	210
[1496]	211	USE land_surface_model_mod, &
	212	ONLY: land_surface, lsm_energy_balance, lsm_soil_model
	213
[1320]	214	USE ls_forcing_mod, &
	215	ONLY: ls_forcing_surf, ls_forcing_vert
	216
[1365]	217	USE nudge_mod, &
[1380]	218	ONLY: calc_tnudge, nudge_ref
[1365]	219
[1320]	220	USE particle_attributes, &
[1671]	221	ONLY: particle_advection, particle_advection_start, &
	222	use_sgs_for_particles, wang_kernel
[1320]	223
[1]	224	USE pegrid
	225
[1320]	226	USE production_e_mod, &
	227	ONLY: production_e_init
	228
[1402]	229	USE progress_bar, &
	230	ONLY: finish_progress_bar, output_progress_bar
	231
[1320]	232	USE prognostic_equations_mod, &
	233	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
	234	prognostic_equations_vector
	235
[1496]	236	USE radiation_model_mod, &
[1585]	237	ONLY: dt_radiation, radiation, radiation_clearsky, &
	238	radiation_rrtmg, radiation_scheme, time_radiation
[1496]	239
[1320]	240	USE statistics, &
[1365]	241	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
[1320]	242
	243	USE user_actions_mod, &
	244	ONLY: user_actions
	245
[1]	246	IMPLICIT NONE
	247
[1682]	248	CHARACTER (LEN=9) :: time_to_string !<
[1]	249
[1682]	250	INTEGER(iwp) :: netcdf_data_format_save !<
[1320]	251
[1]	252	!
	253	!-- At the beginning of a simulation determine the time step as well as
	254	!-- determine and print out the run control parameters
[1342]	255	IF ( simulated_time == 0.0_wp ) CALL timestep
[667]	256
[1]	257	CALL run_control
	258
[667]	259
[108]	260	!
	261	!-- Data exchange between coupled models in case that a call has been omitted
	262	!-- at the end of the previous run of a job chain.
[291]	263	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[108]	264	!
	265	!-- In case of model termination initiated by the local model the coupler
	266	!-- must not be called because this would again cause an MPI hang.
	267	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
	268	CALL surface_coupler
	269	time_coupling = time_coupling - dt_coupling
	270	ENDDO
[1342]	271	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
[348]	272	THEN
	273	time_coupling = time_since_reference_point
	274	ENDIF
[108]	275	ENDIF
	276
	277
[1]	278	#if defined( __dvrp_graphics )
	279	!
	280	!-- Time measurement with dvrp software
	281	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	282	#endif
	283
[1402]	284	CALL location_message( 'start with time-stepping', .TRUE. )
[1]	285	!
	286	!-- Start of the time loop
	287	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
	288	.NOT. terminate_run )
	289
	290	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
[1221]	291
[1]	292	!
	293	!-- Determine size of next time step
[1342]	294	IF ( simulated_time /= 0.0_wp ) THEN
[1221]	295	CALL timestep
	296	ENDIF
	297
[1]	298	!
[1241]	299	!-- Determine ug, vg and w_subs in dependence on data from external file
	300	!-- LSF_DATA
[1365]	301	IF ( large_scale_forcing .AND. lsf_vert ) THEN
[1241]	302	CALL ls_forcing_vert ( simulated_time )
[1365]	303	sums_ls_l = 0.0_wp
[1241]	304	ENDIF
	305
	306	!
[1380]	307	!-- Set pt_init and q_init to the current profiles taken from
	308	!-- NUDGING_DATA
	309	IF ( nudging ) THEN
	310	CALL nudge_ref ( simulated_time )
	311	!
	312	!-- Store temperature gradient at the top boundary for possible Neumann
	313	!-- boundary condition
	314	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
	315	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
	316	ENDIF
	317
	318	!
[1]	319	!-- Execute the user-defined actions
	320	CALL user_actions( 'before_timestep' )
	321
	322	!
	323	!-- Start of intermediate step loop
	324	intermediate_timestep_count = 0
	325	DO WHILE ( intermediate_timestep_count < &
	326	intermediate_timestep_count_max )
	327
	328	intermediate_timestep_count = intermediate_timestep_count + 1
	329
	330	!
	331	!-- Set the steering factors for the prognostic equations which depend
	332	!-- on the timestep scheme
	333	CALL timestep_scheme_steering
	334
	335	!
[1128]	336	!-- Calculate those variables needed in the tendency terms which need
	337	!-- global communication
[1179]	338	IF ( .NOT. use_single_reference_value .AND. &
	339	.NOT. use_initial_profile_as_reference ) THEN
	340	!
	341	!-- Horizontally averaged profiles to be used as reference state in
	342	!-- buoyancy terms (WARNING: only the respective last call of
	343	!-- calc_mean_profile defines the reference state!)
[1365]	344	IF ( .NOT. neutral ) THEN
	345	CALL calc_mean_profile( pt, 4 )
	346	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
	347	ENDIF
	348	IF ( ocean ) THEN
	349	CALL calc_mean_profile( rho, 64 )
	350	ref_state(:) = hom(:,1,64,0)
	351	ENDIF
	352	IF ( humidity ) THEN
	353	CALL calc_mean_profile( vpt, 44 )
	354	ref_state(:) = hom(:,1,44,0)
	355	ENDIF
	356
[1179]	357	ENDIF
	358
[1128]	359	IF ( .NOT. constant_diffusion ) CALL production_e_init
	360	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
	361	intermediate_timestep_count == 1 ) CALL ws_statistics
[1365]	362	!
	363	!-- In case of nudging calculate current nudging time scale and horizontal
[1380]	364	!-- means of u, v, pt and q
[1365]	365	IF ( nudging ) THEN
	366	CALL calc_tnudge( simulated_time )
	367	CALL calc_mean_profile( u, 1 )
	368	CALL calc_mean_profile( v, 2 )
	369	CALL calc_mean_profile( pt, 4 )
	370	CALL calc_mean_profile( q, 41 )
	371	ENDIF
[1128]	372
[1585]	373	IF ( radiation .AND. intermediate_timestep_count &
	374	== intermediate_timestep_count_max ) THEN
	375
	376	time_radiation = time_radiation + dt_3d
	377
	378	IF ( time_radiation >= dt_radiation ) THEN
	379
	380	CALL cpu_log( log_point(50), 'radiation', 'start' )
	381
	382	time_radiation = time_radiation - dt_radiation
	383	IF ( radiation_scheme == 'clear-sky' ) THEN
	384	CALL radiation_clearsky
	385	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
	386	CALL radiation_rrtmg
	387	ENDIF
	388
	389	CALL cpu_log( log_point(50), 'radiation', 'stop' )
	390	ENDIF
	391	ENDIF
[1128]	392	!
[1]	393	!-- Solve the prognostic equations. A fast cache optimized version with
	394	!-- only one single loop is used in case of Piascek-Williams advection
	395	!-- scheme. NEC vector machines use a different version, because
	396	!-- in the other versions a good vectorization is prohibited due to
	397	!-- inlining problems.
[1019]	398	IF ( loop_optimization == 'cache' ) THEN
	399	CALL prognostic_equations_cache
	400	ELSEIF ( loop_optimization == 'vector' ) THEN
[63]	401	CALL prognostic_equations_vector
[1015]	402	ELSEIF ( loop_optimization == 'acc' ) THEN
[1171]	403	i_left = nxl; i_right = nxr
	404	j_south = nys; j_north = nyn
	405	CALL prognostic_equations_acc
	406
	407	! i_left = nxl; i_right = nxl+nbgp-1
[1128]	408	! j_south = nys; j_north = nyn
	409	! CALL prognostic_equations_acc
[1171]	410	! i_left = nxr-nbgp+1; i_right = nxr
	411	! j_south = nys; j_north = nyn
	412	! CALL prognostic_equations_acc
[1128]	413
	414	!
	415	!-- Exchange of ghost points (lateral boundary conditions)
	416	IF ( background_communication ) THEN
	417
	418	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
	419
	420	send_receive = 'lr'
	421	sendrecv_in_background = .TRUE.
	422	req = 0
	423	req_count = 0
	424
	425	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	426	on_device = .TRUE. ! to be removed after complete porting
	427	ELSE ! of ghost point exchange
	428	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	429	ENDIF
	430
	431	CALL exchange_horiz( u_p, nbgp )
	432	CALL exchange_horiz( v_p, nbgp )
	433	CALL exchange_horiz( w_p, nbgp )
	434	CALL exchange_horiz( pt_p, nbgp )
	435	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	436	IF ( ocean ) THEN
	437	CALL exchange_horiz( sa_p, nbgp )
	438	CALL exchange_horiz( rho, nbgp )
	439	CALL exchange_horiz( prho, nbgp )
	440	ENDIF
	441	IF (humidity .OR. passive_scalar) THEN
	442	CALL exchange_horiz( q_p, nbgp )
	443	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	444	CALL exchange_horiz( qr_p, nbgp )
	445	CALL exchange_horiz( nr_p, nbgp )
	446	ENDIF
	447	ENDIF
	448	IF ( cloud_droplets ) THEN
	449	CALL exchange_horiz( ql, nbgp )
	450	CALL exchange_horiz( ql_c, nbgp )
	451	CALL exchange_horiz( ql_v, nbgp )
	452	CALL exchange_horiz( ql_vp, nbgp )
	453	ENDIF
[1671]	454	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	455	THEN
	456	CALL exchange_horiz( diss, nbgp )
	457	ENDIF
[1128]	458
	459	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	460	on_device = .FALSE. ! to be removed after complete porting
	461	ELSE ! of ghost point exchange
	462	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	463	ENDIF
	464
	465	sendrecv_in_background = .FALSE.
	466
	467	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
	468
	469	ENDIF
	470
[1171]	471	! i_left = nxl+nbgp; i_right = nxr-nbgp
	472	! j_south = nys; j_north = nys+nbgp-1
	473	! CALL prognostic_equations_acc
	474	! i_left = nxl+nbgp; i_right = nxr-nbgp
	475	! j_south = nyn-nbgp+1; j_north = nyn
	476	! CALL prognostic_equations_acc
[1128]	477
	478	IF ( background_communication ) THEN
	479	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
	480	#if defined( __parallel )
	481	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	482	#endif
	483	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
	484
	485	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
	486
	487	send_receive = 'ns'
	488	sendrecv_in_background = .TRUE.
	489	req = 0
	490	req_count = 0
	491
	492	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	493	on_device = .TRUE. ! to be removed after complete porting
	494	ELSE ! of ghost point exchange
	495	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	496	ENDIF
	497
	498	CALL exchange_horiz( u_p, nbgp )
	499	CALL exchange_horiz( v_p, nbgp )
	500	CALL exchange_horiz( w_p, nbgp )
	501	CALL exchange_horiz( pt_p, nbgp )
	502	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	503	IF ( ocean ) THEN
	504	CALL exchange_horiz( sa_p, nbgp )
	505	CALL exchange_horiz( rho, nbgp )
	506	CALL exchange_horiz( prho, nbgp )
	507	ENDIF
	508	IF (humidity .OR. passive_scalar) THEN
	509	CALL exchange_horiz( q_p, nbgp )
	510	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	511	CALL exchange_horiz( qr_p, nbgp )
	512	CALL exchange_horiz( nr_p, nbgp )
	513	ENDIF
	514	ENDIF
	515	IF ( cloud_droplets ) THEN
	516	CALL exchange_horiz( ql, nbgp )
	517	CALL exchange_horiz( ql_c, nbgp )
	518	CALL exchange_horiz( ql_v, nbgp )
	519	CALL exchange_horiz( ql_vp, nbgp )
	520	ENDIF
[1671]	521	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	522	THEN
	523	CALL exchange_horiz( diss, nbgp )
	524	ENDIF
[1128]	525
	526	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	527	on_device = .FALSE. ! to be removed after complete porting
	528	ELSE ! of ghost point exchange
	529	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	530	ENDIF
	531
	532	sendrecv_in_background = .FALSE.
	533
	534	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	535
	536	ENDIF
	537
[1171]	538	! i_left = nxl+nbgp; i_right = nxr-nbgp
	539	! j_south = nys+nbgp; j_north = nyn-nbgp
	540	! CALL prognostic_equations_acc
[1128]	541
	542	IF ( background_communication ) THEN
	543	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
	544	#if defined( __parallel )
	545	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	546	#endif
	547	send_receive = 'al'
	548	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
	549	ENDIF
	550
[1]	551	ENDIF
	552
	553	!
[849]	554	!-- Particle transport/physics with the Lagrangian particle model
	555	!-- (only once during intermediate steps, because it uses an Euler-step)
[1128]	556	!-- ### particle model should be moved before prognostic_equations, in order
	557	!-- to regard droplet interactions directly
[63]	558	IF ( particle_advection .AND. &
	559	simulated_time >= particle_advection_start .AND. &
[1]	560	intermediate_timestep_count == 1 ) THEN
[849]	561	CALL lpm
	562	first_call_lpm = .FALSE.
[1]	563	ENDIF
	564
	565	!
	566	!-- Interaction of droplets with temperature and specific humidity.
	567	!-- Droplet condensation and evaporation is calculated within
	568	!-- advec_particles.
	569	IF ( cloud_droplets .AND. &
	570	intermediate_timestep_count == intermediate_timestep_count_max )&
	571	THEN
	572	CALL interaction_droplets_ptq
	573	ENDIF
	574
	575	!
	576	!-- Exchange of ghost points (lateral boundary conditions)
[1128]	577	IF ( .NOT. background_communication ) THEN
[1113]	578
[1128]	579	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
[1113]	580
[1128]	581	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	582	on_device = .TRUE. ! to be removed after complete porting
	583	ELSE ! of ghost point exchange
	584	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
[1053]	585	ENDIF
[1]	586
[1128]	587	CALL exchange_horiz( u_p, nbgp )
	588	CALL exchange_horiz( v_p, nbgp )
	589	CALL exchange_horiz( w_p, nbgp )
	590	CALL exchange_horiz( pt_p, nbgp )
	591	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	592	IF ( ocean ) THEN
	593	CALL exchange_horiz( sa_p, nbgp )
	594	CALL exchange_horiz( rho, nbgp )
	595	CALL exchange_horiz( prho, nbgp )
	596	ENDIF
	597	IF (humidity .OR. passive_scalar) THEN
	598	CALL exchange_horiz( q_p, nbgp )
[1179]	599	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	600	precipitation ) THEN
[1128]	601	CALL exchange_horiz( qr_p, nbgp )
	602	CALL exchange_horiz( nr_p, nbgp )
	603	ENDIF
	604	ENDIF
	605	IF ( cloud_droplets ) THEN
	606	CALL exchange_horiz( ql, nbgp )
	607	CALL exchange_horiz( ql_c, nbgp )
	608	CALL exchange_horiz( ql_v, nbgp )
	609	CALL exchange_horiz( ql_vp, nbgp )
	610	ENDIF
[1671]	611	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	612	THEN
	613	CALL exchange_horiz( diss, nbgp )
	614	ENDIF
[1128]	615
	616	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	617	on_device = .FALSE. ! to be removed after complete porting
	618	ELSE ! of ghost point exchange
	619	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	620	ENDIF
	621
	622	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	623
[1113]	624	ENDIF
	625
[1]	626	!
	627	!-- Boundary conditions for the prognostic quantities (except of the
	628	!-- velocities at the outflow in case of a non-cyclic lateral wall)
[1113]	629	CALL boundary_conds
[1]	630
	631	!
[1496]	632	!-- When using the land surface model:
	633	!-- 1) solve energy balance equation to calculate new skin temperature
	634	!-- 2) run soil model
	635	IF ( land_surface ) THEN
	636
	637	CALL cpu_log( log_point(54), 'land_surface', 'start' )
	638
	639	CALL lsm_energy_balance
	640	CALL lsm_soil_model
	641
	642	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
	643
	644	ENDIF
	645
	646	!
[73]	647	!-- Swap the time levels in preparation for the next time step.
	648	CALL swap_timelevel
	649
	650	!
[1]	651	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
	652	!-- when a sloping surface is used
	653	IF ( sloping_surface ) THEN
[707]	654	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
	655	pt_slope_offset
	656	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
	657	pt_slope_offset
[1]	658	ENDIF
	659
	660	!
[151]	661	!-- Impose a turbulent inflow using the recycling method
	662	IF ( turbulent_inflow ) CALL inflow_turbulence
	663
	664	!
[1]	665	!-- Impose a random perturbation on the horizontal velocity field
[106]	666	IF ( create_disturbances .AND. &
	667	( call_psolver_at_all_substeps .AND. &
[1]	668	intermediate_timestep_count == intermediate_timestep_count_max )&
[106]	669	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
	670	intermediate_timestep_count == 1 ) ) &
[1]	671	THEN
	672	time_disturb = time_disturb + dt_3d
	673	IF ( time_disturb >= dt_disturb ) THEN
[1111]	674	!$acc update host( u, v )
[1113]	675	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
[87]	676	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
[75]	677	CALL disturb_field( nzb_u_inner, tend, u )
	678	CALL disturb_field( nzb_v_inner, tend, v )
[707]	679	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
[1]	680	!
	681	!-- Runs with a non-cyclic lateral wall need perturbations
	682	!-- near the inflow throughout the whole simulation
	683	dist_range = 1
[75]	684	CALL disturb_field( nzb_u_inner, tend, u )
	685	CALL disturb_field( nzb_v_inner, tend, v )
[1]	686	dist_range = 0
	687	ENDIF
[1113]	688	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
[1111]	689	!$acc update device( u, v )
[1]	690	time_disturb = time_disturb - dt_disturb
	691	ENDIF
	692	ENDIF
	693
	694	!
	695	!-- Reduce the velocity divergence via the equation for perturbation
	696	!-- pressure.
[106]	697	IF ( intermediate_timestep_count == 1 .OR. &
	698	call_psolver_at_all_substeps ) THEN
[1]	699	CALL pres
	700	ENDIF
	701
	702	!
	703	!-- If required, compute liquid water content
[1015]	704	IF ( cloud_physics ) THEN
	705	CALL calc_liquid_water_content
	706	!$acc update device( ql )
	707	ENDIF
[1115]	708	!
	709	!-- If required, compute virtual potential temperature
	710	IF ( humidity ) THEN
	711	CALL compute_vpt
	712	!$acc update device( vpt )
	713	ENDIF
[1585]	714
[1]	715	!
	716	!-- Compute the diffusion quantities
	717	IF ( .NOT. constant_diffusion ) THEN
	718
	719	!
[1276]	720	!-- Determine surface fluxes shf and qsws and surface values
	721	!-- pt_surface and q_surface in dependence on data from external
	722	!-- file LSF_DATA respectively
	723	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
	724	intermediate_timestep_count == intermediate_timestep_count_max )&
	725	THEN
	726	CALL ls_forcing_surf ( simulated_time )
	727	ENDIF
	728
	729	!
[1]	730	!-- First the vertical fluxes in the Prandtl layer are being computed
	731	IF ( prandtl_layer ) THEN
	732	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
	733	CALL prandtl_fluxes
	734	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
	735	ENDIF
[1241]	736
[1]	737	!
	738	!-- Compute the diffusion coefficients
	739	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
[75]	740	IF ( .NOT. humidity ) THEN
[97]	741	IF ( ocean ) THEN
[388]	742	CALL diffusivities( prho, prho_reference )
[97]	743	ELSE
	744	CALL diffusivities( pt, pt_reference )
	745	ENDIF
[1]	746	ELSE
[97]	747	CALL diffusivities( vpt, pt_reference )
[1]	748	ENDIF
	749	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
	750
	751	ENDIF
	752
	753	ENDDO ! Intermediate step loop
	754
	755	!
	756	!-- Increase simulation time and output times
[1111]	757	nr_timesteps_this_run = nr_timesteps_this_run + 1
[291]	758	current_timestep_number = current_timestep_number + 1
	759	simulated_time = simulated_time + dt_3d
	760	simulated_time_chr = time_to_string( simulated_time )
	761	time_since_reference_point = simulated_time - coupling_start_time
	762
[1]	763	IF ( simulated_time >= skip_time_data_output_av ) THEN
	764	time_do_av = time_do_av + dt_3d
	765	ENDIF
	766	IF ( simulated_time >= skip_time_do2d_xy ) THEN
	767	time_do2d_xy = time_do2d_xy + dt_3d
	768	ENDIF
	769	IF ( simulated_time >= skip_time_do2d_xz ) THEN
	770	time_do2d_xz = time_do2d_xz + dt_3d
	771	ENDIF
	772	IF ( simulated_time >= skip_time_do2d_yz ) THEN
	773	time_do2d_yz = time_do2d_yz + dt_3d
	774	ENDIF
	775	IF ( simulated_time >= skip_time_do3d ) THEN
	776	time_do3d = time_do3d + dt_3d
	777	ENDIF
[410]	778	DO mid = 1, masks
	779	IF ( simulated_time >= skip_time_domask(mid) ) THEN
	780	time_domask(mid)= time_domask(mid) + dt_3d
	781	ENDIF
	782	ENDDO
[1]	783	time_dvrp = time_dvrp + dt_3d
	784	IF ( simulated_time >= skip_time_dosp ) THEN
	785	time_dosp = time_dosp + dt_3d
	786	ENDIF
	787	time_dots = time_dots + dt_3d
[849]	788	IF ( .NOT. first_call_lpm ) THEN
[1]	789	time_dopts = time_dopts + dt_3d
	790	ENDIF
	791	IF ( simulated_time >= skip_time_dopr ) THEN
	792	time_dopr = time_dopr + dt_3d
	793	ENDIF
	794	time_dopr_listing = time_dopr_listing + dt_3d
	795	time_run_control = time_run_control + dt_3d
	796
	797	!
[102]	798	!-- Data exchange between coupled models
[291]	799	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[102]	800	time_coupling = time_coupling + dt_3d
[343]	801
[108]	802	!
	803	!-- In case of model termination initiated by the local model
	804	!-- (terminate_coupled > 0), the coupler must be skipped because it would
	805	!-- cause an MPI intercomminucation hang.
	806	!-- If necessary, the coupler will be called at the beginning of the
	807	!-- next restart run.
	808	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
[102]	809	CALL surface_coupler
	810	time_coupling = time_coupling - dt_coupling
	811	ENDDO
	812	ENDIF
	813
	814	!
[46]	815	!-- Execute user-defined actions
	816	CALL user_actions( 'after_integration' )
	817
	818	!
[1]	819	!-- If Galilei transformation is used, determine the distance that the
	820	!-- model has moved so far
	821	IF ( galilei_transformation ) THEN
	822	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
	823	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
	824	ENDIF
	825
	826	!
	827	!-- Check, if restart is necessary (because cpu-time is expiring or
	828	!-- because it is forced by user) and set stop flag
[108]	829	!-- This call is skipped if the remote model has already initiated a restart.
	830	IF ( .NOT. terminate_run ) CALL check_for_restart
[1]	831
	832	!
	833	!-- Carry out statistical analysis and output at the requested output times.
	834	!-- The MOD function is used for calculating the output time counters (like
	835	!-- time_dopr) in order to regard a possible decrease of the output time
	836	!-- interval in case of restart runs
	837
	838	!
	839	!-- Set a flag indicating that so far no statistics have been created
	840	!-- for this time step
	841	flow_statistics_called = .FALSE.
	842
	843	!
	844	!-- If required, call flow_statistics for averaging in time
[1342]	845	IF ( averaging_interval_pr /= 0.0_wp .AND. &
[1]	846	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
	847	simulated_time >= skip_time_dopr ) THEN
	848	time_dopr_av = time_dopr_av + dt_3d
	849	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
	850	do_sum = .TRUE.
	851	time_dopr_av = MOD( time_dopr_av, &
	852	MAX( dt_averaging_input_pr, dt_3d ) )
	853	ENDIF
	854	ENDIF
	855	IF ( do_sum ) CALL flow_statistics
	856
	857	!
[410]	858	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
[1342]	859	IF ( averaging_interval /= 0.0_wp .AND. &
[1]	860	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
	861	simulated_time >= skip_time_data_output_av ) &
	862	THEN
	863	time_do_sla = time_do_sla + dt_3d
	864	IF ( time_do_sla >= dt_averaging_input ) THEN
	865	CALL sum_up_3d_data
	866	average_count_3d = average_count_3d + 1
	867	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
	868	ENDIF
	869	ENDIF
	870
	871	!
	872	!-- Calculate spectra for time averaging
[1342]	873	IF ( averaging_interval_sp /= 0.0_wp .AND. &
[1]	874	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
	875	simulated_time >= skip_time_dosp ) THEN
	876	time_dosp_av = time_dosp_av + dt_3d
	877	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
	878	CALL calc_spectra
	879	time_dosp_av = MOD( time_dosp_av, &
	880	MAX( dt_averaging_input_pr, dt_3d ) )
	881	ENDIF
	882	ENDIF
	883
	884	!
	885	!-- Computation and output of run control parameters.
[1001]	886	!-- This is also done whenever perturbations have been imposed
[1]	887	IF ( time_run_control >= dt_run_control .OR. &
[1001]	888	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
[1]	889	THEN
	890	CALL run_control
	891	IF ( time_run_control >= dt_run_control ) THEN
	892	time_run_control = MOD( time_run_control, &
	893	MAX( dt_run_control, dt_3d ) )
	894	ENDIF
	895	ENDIF
	896
	897	!
	898	!-- Profile output (ASCII) on file
	899	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
	900	CALL print_1d
	901	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
	902	dt_3d ) )
	903	ENDIF
	904
	905	!
	906	!-- Graphic output for PROFIL
	907	IF ( time_dopr >= dt_dopr ) THEN
	908	IF ( dopr_n /= 0 ) CALL data_output_profiles
	909	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
[1342]	910	time_dopr_av = 0.0_wp ! due to averaging (see above)
[1]	911	ENDIF
	912
	913	!
	914	!-- Graphic output for time series
	915	IF ( time_dots >= dt_dots ) THEN
[48]	916	CALL data_output_tseries
[1]	917	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
	918	ENDIF
	919
	920	!
	921	!-- Output of spectra (formatted for use with PROFIL), in case of no
	922	!-- time averaging, spectra has to be calculated before
	923	IF ( time_dosp >= dt_dosp ) THEN
	924	IF ( average_count_sp == 0 ) CALL calc_spectra
	925	CALL data_output_spectra
	926	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
	927	ENDIF
	928
	929	!
	930	!-- 2d-data output (cross-sections)
	931	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
	932	CALL data_output_2d( 'xy', 0 )
	933	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
	934	ENDIF
	935	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
	936	CALL data_output_2d( 'xz', 0 )
	937	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
	938	ENDIF
	939	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
	940	CALL data_output_2d( 'yz', 0 )
	941	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
	942	ENDIF
	943
	944	!
	945	!-- 3d-data output (volume data)
	946	IF ( time_do3d >= dt_do3d ) THEN
	947	CALL data_output_3d( 0 )
	948	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
	949	ENDIF
	950
	951	!
[410]	952	!-- masked data output
[1308]	953	!-- Parallel netcdf output is not tested so far for masked data, hence
	954	!-- netcdf_data_format is switched back to non-paralell output.
	955	netcdf_data_format_save = netcdf_data_format
	956	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	957	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	958	DO mid = 1, masks
	959	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
	960	CALL data_output_mask( 0 )
	961	time_domask(mid) = MOD( time_domask(mid), &
	962	MAX( dt_domask(mid), dt_3d ) )
	963	ENDIF
	964	ENDDO
[1308]	965	netcdf_data_format = netcdf_data_format_save
[410]	966
	967	!
	968	!-- Output of time-averaged 2d/3d/masked data
[1]	969	IF ( time_do_av >= dt_data_output_av ) THEN
	970	CALL average_3d_data
	971	CALL data_output_2d( 'xy', 1 )
	972	CALL data_output_2d( 'xz', 1 )
	973	CALL data_output_2d( 'yz', 1 )
	974	CALL data_output_3d( 1 )
[1308]	975	!-- Parallel netcdf output is not tested so far for masked data, hence
	976	!-- netcdf_data_format is switched back to non-paralell output.
	977	netcdf_data_format_save = netcdf_data_format
	978	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	979	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	980	DO mid = 1, masks
	981	CALL data_output_mask( 1 )
	982	ENDDO
[1308]	983	netcdf_data_format = netcdf_data_format_save
[1]	984	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
	985	ENDIF
	986
	987	!
	988	!-- Output of particle time series
[253]	989	IF ( particle_advection ) THEN
	990	IF ( time_dopts >= dt_dopts .OR. &
	991	( simulated_time >= particle_advection_start .AND. &
[849]	992	first_call_lpm ) ) THEN
[253]	993	CALL data_output_ptseries
	994	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
	995	ENDIF
[1]	996	ENDIF
	997
	998	!
	999	!-- Output of dvrp-graphics (isosurface, particles, slicer)
	1000	#if defined( __dvrp_graphics )
	1001	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
	1002	#endif
	1003	IF ( time_dvrp >= dt_dvrp ) THEN
	1004	CALL data_output_dvrp
	1005	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
	1006	ENDIF
	1007	#if defined( __dvrp_graphics )
	1008	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	1009	#endif
	1010
	1011	!
	1012	!-- If required, set the heat flux for the next time step at a random value
	1013	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
	1014
	1015	!
	1016	!-- Execute user-defined actions
	1017	CALL user_actions( 'after_timestep' )
	1018
[1402]	1019	!
	1020	!-- Output elapsed simulated time in form of a progress bar on stdout
	1021	IF ( myid == 0 ) CALL output_progress_bar
	1022
[1]	1023	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
	1024
[667]	1025
[1]	1026	ENDDO ! time loop
	1027
[1402]	1028	IF ( myid == 0 ) CALL finish_progress_bar
	1029
[1]	1030	#if defined( __dvrp_graphics )
	1031	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
	1032	#endif
	1033
[1402]	1034	CALL location_message( 'finished time-stepping', .TRUE. )
[1384]	1035
[1]	1036	END SUBROUTINE time_integration

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