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source: palm/trunk/SOURCE/time_integration.f90 @ 1679

Last change on this file since 1679 was 1672, checked in by raasch, 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	!
[1672]	23	!
[1366]	24	! Former revisions:
	25	! -----------------
	26	! $Id: time_integration.f90 1672 2015-09-25 03:30:49Z boeske $
	27	!
[1672]	28	! 1671 2015-09-25 03:29:37Z raasch
	29	! bugfix: ghostpoint exchange for array diss in case that sgs velocities are used
	30	! for particles
	31	!
[1586]	32	! 1585 2015-04-30 07:05:52Z maronga
	33	! Moved call of radiation scheme. Added support for RRTM
	34	!
[1552]	35	! 1551 2015-03-03 14:18:16Z maronga
	36	! Added interface for different radiation schemes.
	37	!
[1497]	38	! 1496 2014-12-02 17:25:50Z maronga
	39	! Added calls for the land surface model and radiation scheme
	40	!
[1403]	41	! 1402 2014-05-09 14:25:13Z raasch
	42	! location messages modified
	43	!
[1385]	44	! 1384 2014-05-02 14:31:06Z raasch
	45	! location messages added
	46	!
[1381]	47	! 1380 2014-04-28 12:40:45Z heinze
	48	! CALL of nudge_ref added
	49	! bc_pt_t_val and bc_q_t_val are updated in case nudging is used
	50	!
[1366]	51	! 1365 2014-04-22 15:03:56Z boeske
[1365]	52	! Reset sums_ls_l to zero at each timestep
	53	! +sums_ls_l
	54	! Calculation of reference state (previously in subroutine calc_mean_profile)
	55
[1343]	56	! 1342 2014-03-26 17:04:47Z kanani
	57	! REAL constants defined as wp-kind
	58	!
[1321]	59	! 1320 2014-03-20 08:40:49Z raasch
[1320]	60	! ONLY-attribute added to USE-statements,
	61	! kind-parameters added to all INTEGER and REAL declaration statements,
	62	! kinds are defined in new module kinds,
	63	! old module precision_kind is removed,
	64	! revision history before 2012 removed,
	65	! comment fields (!:) to be used for variable explanations added to
	66	! all variable declaration statements
[1319]	67	! 1318 2014-03-17 13:35:16Z raasch
	68	! module interfaces removed
	69	!
[1309]	70	! 1308 2014-03-13 14:58:42Z fricke
	71	! +netcdf_data_format_save
	72	! For masked data, parallel netcdf output is not tested so far, hence
	73	! netcdf_data_format is switched back to non-paralell output.
	74	!
[1277]	75	! 1276 2014-01-15 13:40:41Z heinze
	76	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
	77	!
[1258]	78	! 1257 2013-11-08 15:18:40Z raasch
	79	! acc-update-host directive for timestep removed
	80	!
[1242]	81	! 1241 2013-10-30 11:36:58Z heinze
	82	! Generalize calc_mean_profile for wider use
	83	! Determine shf and qsws in dependence on data from LSF_DATA
	84	! Determine ug and vg in dependence on data from LSF_DATA
[1222]	85	! 1221 2013-09-10 08:59:13Z raasch
	86	! host update of arrays before timestep is called
	87	!
[1182]	88	! 1179 2013-06-14 05:57:58Z raasch
	89	! mean profiles for reference state are only calculated if required,
	90	! small bugfix for background communication
	91	!
[1172]	92	! 1171 2013-05-30 11:27:45Z raasch
	93	! split of prognostic_equations deactivated (comment lines), for the time being
	94	!
[1132]	95	! 1128 2013-04-12 06:19:32Z raasch
[1128]	96	! asynchronous transfer of ghost point data realized for acc-optimized version:
	97	! prognostic_equations are first called two times for those points required for
	98	! the left-right and north-south exchange, respectively, and then for the
	99	! remaining points,
	100	! those parts requiring global communication moved from prognostic_equations to
	101	! here
[392]	102	!
[1116]	103	! 1115 2013-03-26 18:16:16Z hoffmann
	104	! calculation of qr and nr is restricted to precipitation
	105	!
[1114]	106	! 1113 2013-03-10 02:48:14Z raasch
	107	! GPU-porting of boundary conditions,
	108	! openACC directives updated
	109	! formal parameter removed from routine boundary_conds
	110	!
[1112]	111	! 1111 2013-03-08 23:54:10Z raasch
	112	! +internal timestep counter for cpu statistics added,
	113	! openACC directives updated
	114	!
[1093]	115	! 1092 2013-02-02 11:24:22Z raasch
	116	! unused variables removed
	117	!
[1066]	118	! 1065 2012-11-22 17:42:36Z hoffmann
	119	! exchange of diss (dissipation rate) in case of turbulence = .TRUE. added
	120	!
[1054]	121	! 1053 2012-11-13 17:11:03Z hoffmann
	122	! exchange of ghost points for nr, qr added
	123	!
[1037]	124	! 1036 2012-10-22 13:43:42Z raasch
	125	! code put under GPL (PALM 3.9)
	126	!
[1020]	127	! 1019 2012-09-28 06:46:45Z raasch
	128	! non-optimized version of prognostic_equations removed
	129	!
[1017]	130	! 1015 2012-09-27 09:23:24Z raasch
	131	! +call of prognostic_equations_acc
	132	!
[1002]	133	! 1001 2012-09-13 14:08:46Z raasch
	134	! all actions concerning leapfrog- and upstream-spline-scheme removed
	135	!
[850]	136	! 849 2012-03-15 10:35:09Z raasch
	137	! advec_particles renamed lpm, first_call_advec_particles renamed first_call_lpm
	138	!
[826]	139	! 825 2012-02-19 03:03:44Z raasch
	140	! wang_collision_kernel renamed wang_kernel
	141	!
[1]	142	! Revision 1.1 1997/08/11 06:19:04 raasch
	143	! Initial revision
	144	!
	145	!
	146	! Description:
	147	! ------------
	148	! Integration in time of the model equations, statistical analysis and graphic
	149	! output
	150	!------------------------------------------------------------------------------!
	151
[1320]	152	USE advec_ws, &
	153	ONLY: ws_statistics
	154
	155	USE arrays_3d, &
[1380]	156	ONLY: diss, dzu, e_p, nr_p, prho, pt, pt_p, pt_init, q_init, q, ql, &
	157	ql_c, ql_v, ql_vp, qr_p, q_p, ref_state, rho, sa_p, tend, u, &
	158	u_p, v, vpt, v_p, w_p
[1320]	159
[1365]	160	USE calc_mean_profile_mod, &
[1320]	161	ONLY: calc_mean_profile
	162
	163	USE control_parameters, &
	164	ONLY: advected_distance_x, advected_distance_y, average_count_3d, &
	165	average_count_sp, averaging_interval, averaging_interval_pr, &
[1380]	166	averaging_interval_sp, bc_lr_cyc, bc_ns_cyc, bc_pt_t_val, &
	167	bc_q_t_val, call_psolver_at_all_substeps, cloud_droplets, &
	168	cloud_physics, constant_heatflux, create_disturbances, dopr_n, &
[1320]	169	constant_diffusion, coupling_mode, coupling_start_time, &
	170	current_timestep_number, disturbance_created, &
	171	disturbance_energy_limit, dist_range, do_sum, dt_3d, &
	172	dt_averaging_input, dt_averaging_input_pr, dt_coupling, &
	173	dt_data_output_av, dt_disturb, dt_do2d_xy, dt_do2d_xz, &
	174	dt_do2d_yz, dt_do3d, dt_domask,dt_dopts, dt_dopr, &
	175	dt_dopr_listing, dt_dosp, dt_dots, dt_dvrp, dt_run_control, &
	176	end_time, first_call_lpm, galilei_transformation, humidity, &
	177	icloud_scheme, intermediate_timestep_count, &
	178	intermediate_timestep_count_max, large_scale_forcing, &
	179	loop_optimization, lsf_surf, lsf_vert, masks, mid, &
[1365]	180	netcdf_data_format, neutral, nr_timesteps_this_run, nudging, &
	181	ocean, on_device, passive_scalar, prandtl_layer, precipitation, &
[1320]	182	prho_reference, pt_reference, pt_slope_offset, random_heatflux, &
	183	run_coupled, simulated_time, simulated_time_chr, &
	184	skip_time_do2d_xy, skip_time_do2d_xz, skip_time_do2d_yz, &
	185	skip_time_do3d, skip_time_domask, skip_time_dopr, &
	186	skip_time_dosp, skip_time_data_output_av, sloping_surface, &
	187	stop_dt, terminate_coupled, terminate_run, timestep_scheme, &
	188	time_coupling, time_do2d_xy, time_do2d_xz, time_do2d_yz, &
	189	time_do3d, time_domask, time_dopr, time_dopr_av, &
	190	time_dopr_listing, time_dopts, time_dosp, time_dosp_av, &
	191	time_dots, time_do_av, time_do_sla, time_disturb, time_dvrp, &
[1496]	192	time_run_control, time_since_reference_point, &
	193	turbulence, &
[1320]	194	turbulent_inflow, use_initial_profile_as_reference, &
	195	use_single_reference_value, u_gtrans, v_gtrans, ws_scheme_mom, &
	196	ws_scheme_sca
	197
	198	USE cpulog, &
	199	ONLY: cpu_log, log_point, log_point_s
	200
	201	USE indices, &
	202	ONLY: i_left, i_right, j_north, j_south, nbgp, nx, nxl, nxlg, nxr, &
[1380]	203	nxrg, nyn, nys, nzb, nzt, nzb_u_inner, nzb_v_inner
[1320]	204
	205	USE interaction_droplets_ptq_mod, &
	206	ONLY: interaction_droplets_ptq
	207
	208	USE kinds
	209
[1496]	210	USE land_surface_model_mod, &
	211	ONLY: land_surface, lsm_energy_balance, lsm_soil_model
	212
[1320]	213	USE ls_forcing_mod, &
	214	ONLY: ls_forcing_surf, ls_forcing_vert
	215
[1365]	216	USE nudge_mod, &
[1380]	217	ONLY: calc_tnudge, nudge_ref
[1365]	218
[1320]	219	USE particle_attributes, &
[1671]	220	ONLY: particle_advection, particle_advection_start, &
	221	use_sgs_for_particles, wang_kernel
[1320]	222
[1]	223	USE pegrid
	224
[1320]	225	USE production_e_mod, &
	226	ONLY: production_e_init
	227
[1402]	228	USE progress_bar, &
	229	ONLY: finish_progress_bar, output_progress_bar
	230
[1320]	231	USE prognostic_equations_mod, &
	232	ONLY: prognostic_equations_acc, prognostic_equations_cache, &
	233	prognostic_equations_vector
	234
[1496]	235	USE radiation_model_mod, &
[1585]	236	ONLY: dt_radiation, radiation, radiation_clearsky, &
	237	radiation_rrtmg, radiation_scheme, time_radiation
[1496]	238
[1320]	239	USE statistics, &
[1365]	240	ONLY: flow_statistics_called, hom, pr_palm, sums_ls_l
[1320]	241
	242	USE user_actions_mod, &
	243	ONLY: user_actions
	244
[1]	245	IMPLICIT NONE
	246
[1320]	247	CHARACTER (LEN=9) :: time_to_string !:
[1]	248
[1320]	249	INTEGER(iwp) :: netcdf_data_format_save !:
	250
[1]	251	!
	252	!-- At the beginning of a simulation determine the time step as well as
	253	!-- determine and print out the run control parameters
[1342]	254	IF ( simulated_time == 0.0_wp ) CALL timestep
[667]	255
[1]	256	CALL run_control
	257
[667]	258
[108]	259	!
	260	!-- Data exchange between coupled models in case that a call has been omitted
	261	!-- at the end of the previous run of a job chain.
[291]	262	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[108]	263	!
	264	!-- In case of model termination initiated by the local model the coupler
	265	!-- must not be called because this would again cause an MPI hang.
	266	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
	267	CALL surface_coupler
	268	time_coupling = time_coupling - dt_coupling
	269	ENDDO
[1342]	270	IF (time_coupling == 0.0_wp .AND. time_since_reference_point < dt_coupling)&
[348]	271	THEN
	272	time_coupling = time_since_reference_point
	273	ENDIF
[108]	274	ENDIF
	275
	276
[1]	277	#if defined( __dvrp_graphics )
	278	!
	279	!-- Time measurement with dvrp software
	280	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	281	#endif
	282
[1402]	283	CALL location_message( 'start with time-stepping', .TRUE. )
[1]	284	!
	285	!-- Start of the time loop
	286	DO WHILE ( simulated_time < end_time .AND. .NOT. stop_dt .AND. &
	287	.NOT. terminate_run )
	288
	289	CALL cpu_log( log_point_s(10), 'timesteps', 'start' )
[1221]	290
[1]	291	!
	292	!-- Determine size of next time step
[1342]	293	IF ( simulated_time /= 0.0_wp ) THEN
[1221]	294	CALL timestep
	295	ENDIF
	296
[1]	297	!
[1241]	298	!-- Determine ug, vg and w_subs in dependence on data from external file
	299	!-- LSF_DATA
[1365]	300	IF ( large_scale_forcing .AND. lsf_vert ) THEN
[1241]	301	CALL ls_forcing_vert ( simulated_time )
[1365]	302	sums_ls_l = 0.0_wp
[1241]	303	ENDIF
	304
	305	!
[1380]	306	!-- Set pt_init and q_init to the current profiles taken from
	307	!-- NUDGING_DATA
	308	IF ( nudging ) THEN
	309	CALL nudge_ref ( simulated_time )
	310	!
	311	!-- Store temperature gradient at the top boundary for possible Neumann
	312	!-- boundary condition
	313	bc_pt_t_val = ( pt_init(nzt+1) - pt_init(nzt) ) / dzu(nzt+1)
	314	bc_q_t_val = ( q_init(nzt+1) - q_init(nzt) ) / dzu(nzt+1)
	315	ENDIF
	316
	317	!
[1]	318	!-- Execute the user-defined actions
	319	CALL user_actions( 'before_timestep' )
	320
	321	!
	322	!-- Start of intermediate step loop
	323	intermediate_timestep_count = 0
	324	DO WHILE ( intermediate_timestep_count < &
	325	intermediate_timestep_count_max )
	326
	327	intermediate_timestep_count = intermediate_timestep_count + 1
	328
	329	!
	330	!-- Set the steering factors for the prognostic equations which depend
	331	!-- on the timestep scheme
	332	CALL timestep_scheme_steering
	333
	334	!
[1128]	335	!-- Calculate those variables needed in the tendency terms which need
	336	!-- global communication
[1179]	337	IF ( .NOT. use_single_reference_value .AND. &
	338	.NOT. use_initial_profile_as_reference ) THEN
	339	!
	340	!-- Horizontally averaged profiles to be used as reference state in
	341	!-- buoyancy terms (WARNING: only the respective last call of
	342	!-- calc_mean_profile defines the reference state!)
[1365]	343	IF ( .NOT. neutral ) THEN
	344	CALL calc_mean_profile( pt, 4 )
	345	ref_state(:) = hom(:,1,4,0) ! this is used in the buoyancy term
	346	ENDIF
	347	IF ( ocean ) THEN
	348	CALL calc_mean_profile( rho, 64 )
	349	ref_state(:) = hom(:,1,64,0)
	350	ENDIF
	351	IF ( humidity ) THEN
	352	CALL calc_mean_profile( vpt, 44 )
	353	ref_state(:) = hom(:,1,44,0)
	354	ENDIF
	355
[1179]	356	ENDIF
	357
[1128]	358	IF ( .NOT. constant_diffusion ) CALL production_e_init
	359	IF ( ( ws_scheme_mom .OR. ws_scheme_sca ) .AND. &
	360	intermediate_timestep_count == 1 ) CALL ws_statistics
[1365]	361	!
	362	!-- In case of nudging calculate current nudging time scale and horizontal
[1380]	363	!-- means of u, v, pt and q
[1365]	364	IF ( nudging ) THEN
	365	CALL calc_tnudge( simulated_time )
	366	CALL calc_mean_profile( u, 1 )
	367	CALL calc_mean_profile( v, 2 )
	368	CALL calc_mean_profile( pt, 4 )
	369	CALL calc_mean_profile( q, 41 )
	370	ENDIF
[1128]	371
[1585]	372	IF ( radiation .AND. intermediate_timestep_count &
	373	== intermediate_timestep_count_max ) THEN
	374
	375	time_radiation = time_radiation + dt_3d
	376
	377	IF ( time_radiation >= dt_radiation ) THEN
	378
	379	CALL cpu_log( log_point(50), 'radiation', 'start' )
	380
	381	time_radiation = time_radiation - dt_radiation
	382	IF ( radiation_scheme == 'clear-sky' ) THEN
	383	CALL radiation_clearsky
	384	ELSEIF ( radiation_scheme == 'rrtmg' ) THEN
	385	CALL radiation_rrtmg
	386	ENDIF
	387
	388	CALL cpu_log( log_point(50), 'radiation', 'stop' )
	389	ENDIF
	390	ENDIF
[1128]	391	!
[1]	392	!-- Solve the prognostic equations. A fast cache optimized version with
	393	!-- only one single loop is used in case of Piascek-Williams advection
	394	!-- scheme. NEC vector machines use a different version, because
	395	!-- in the other versions a good vectorization is prohibited due to
	396	!-- inlining problems.
[1019]	397	IF ( loop_optimization == 'cache' ) THEN
	398	CALL prognostic_equations_cache
	399	ELSEIF ( loop_optimization == 'vector' ) THEN
[63]	400	CALL prognostic_equations_vector
[1015]	401	ELSEIF ( loop_optimization == 'acc' ) THEN
[1171]	402	i_left = nxl; i_right = nxr
	403	j_south = nys; j_north = nyn
	404	CALL prognostic_equations_acc
	405
	406	! i_left = nxl; i_right = nxl+nbgp-1
[1128]	407	! j_south = nys; j_north = nyn
	408	! CALL prognostic_equations_acc
[1171]	409	! i_left = nxr-nbgp+1; i_right = nxr
	410	! j_south = nys; j_north = nyn
	411	! CALL prognostic_equations_acc
[1128]	412
	413	!
	414	!-- Exchange of ghost points (lateral boundary conditions)
	415	IF ( background_communication ) THEN
	416
	417	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
	418
	419	send_receive = 'lr'
	420	sendrecv_in_background = .TRUE.
	421	req = 0
	422	req_count = 0
	423
	424	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	425	on_device = .TRUE. ! to be removed after complete porting
	426	ELSE ! of ghost point exchange
	427	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	428	ENDIF
	429
	430	CALL exchange_horiz( u_p, nbgp )
	431	CALL exchange_horiz( v_p, nbgp )
	432	CALL exchange_horiz( w_p, nbgp )
	433	CALL exchange_horiz( pt_p, nbgp )
	434	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	435	IF ( ocean ) THEN
	436	CALL exchange_horiz( sa_p, nbgp )
	437	CALL exchange_horiz( rho, nbgp )
	438	CALL exchange_horiz( prho, nbgp )
	439	ENDIF
	440	IF (humidity .OR. passive_scalar) THEN
	441	CALL exchange_horiz( q_p, nbgp )
	442	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	443	CALL exchange_horiz( qr_p, nbgp )
	444	CALL exchange_horiz( nr_p, nbgp )
	445	ENDIF
	446	ENDIF
	447	IF ( cloud_droplets ) THEN
	448	CALL exchange_horiz( ql, nbgp )
	449	CALL exchange_horiz( ql_c, nbgp )
	450	CALL exchange_horiz( ql_v, nbgp )
	451	CALL exchange_horiz( ql_vp, nbgp )
	452	ENDIF
[1671]	453	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	454	THEN
	455	CALL exchange_horiz( diss, nbgp )
	456	ENDIF
[1128]	457
	458	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	459	on_device = .FALSE. ! to be removed after complete porting
	460	ELSE ! of ghost point exchange
	461	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	462	ENDIF
	463
	464	sendrecv_in_background = .FALSE.
	465
	466	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'pause' )
	467
	468	ENDIF
	469
[1171]	470	! i_left = nxl+nbgp; i_right = nxr-nbgp
	471	! j_south = nys; j_north = nys+nbgp-1
	472	! CALL prognostic_equations_acc
	473	! i_left = nxl+nbgp; i_right = nxr-nbgp
	474	! j_south = nyn-nbgp+1; j_north = nyn
	475	! CALL prognostic_equations_acc
[1128]	476
	477	IF ( background_communication ) THEN
	478	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'start' )
	479	#if defined( __parallel )
	480	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	481	#endif
	482	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'pause' )
	483
	484	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'continue' )
	485
	486	send_receive = 'ns'
	487	sendrecv_in_background = .TRUE.
	488	req = 0
	489	req_count = 0
	490
	491	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	492	on_device = .TRUE. ! to be removed after complete porting
	493	ELSE ! of ghost point exchange
	494	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
	495	ENDIF
	496
	497	CALL exchange_horiz( u_p, nbgp )
	498	CALL exchange_horiz( v_p, nbgp )
	499	CALL exchange_horiz( w_p, nbgp )
	500	CALL exchange_horiz( pt_p, nbgp )
	501	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	502	IF ( ocean ) THEN
	503	CALL exchange_horiz( sa_p, nbgp )
	504	CALL exchange_horiz( rho, nbgp )
	505	CALL exchange_horiz( prho, nbgp )
	506	ENDIF
	507	IF (humidity .OR. passive_scalar) THEN
	508	CALL exchange_horiz( q_p, nbgp )
	509	IF ( cloud_physics .AND. icloud_scheme == 0 ) THEN
	510	CALL exchange_horiz( qr_p, nbgp )
	511	CALL exchange_horiz( nr_p, nbgp )
	512	ENDIF
	513	ENDIF
	514	IF ( cloud_droplets ) THEN
	515	CALL exchange_horiz( ql, nbgp )
	516	CALL exchange_horiz( ql_c, nbgp )
	517	CALL exchange_horiz( ql_v, nbgp )
	518	CALL exchange_horiz( ql_vp, nbgp )
	519	ENDIF
[1671]	520	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	521	THEN
	522	CALL exchange_horiz( diss, nbgp )
	523	ENDIF
[1128]	524
	525	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	526	on_device = .FALSE. ! to be removed after complete porting
	527	ELSE ! of ghost point exchange
	528	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	529	ENDIF
	530
	531	sendrecv_in_background = .FALSE.
	532
	533	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	534
	535	ENDIF
	536
[1171]	537	! i_left = nxl+nbgp; i_right = nxr-nbgp
	538	! j_south = nys+nbgp; j_north = nyn-nbgp
	539	! CALL prognostic_equations_acc
[1128]	540
	541	IF ( background_communication ) THEN
	542	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'continue' )
	543	#if defined( __parallel )
	544	CALL MPI_WAITALL( req_count, req, wait_stat, ierr )
	545	#endif
	546	send_receive = 'al'
	547	CALL cpu_log( log_point(41), 'exchange-horiz-wait', 'stop' )
	548	ENDIF
	549
[1]	550	ENDIF
	551
	552	!
[849]	553	!-- Particle transport/physics with the Lagrangian particle model
	554	!-- (only once during intermediate steps, because it uses an Euler-step)
[1128]	555	!-- ### particle model should be moved before prognostic_equations, in order
	556	!-- to regard droplet interactions directly
[63]	557	IF ( particle_advection .AND. &
	558	simulated_time >= particle_advection_start .AND. &
[1]	559	intermediate_timestep_count == 1 ) THEN
[849]	560	CALL lpm
	561	first_call_lpm = .FALSE.
[1]	562	ENDIF
	563
	564	!
	565	!-- Interaction of droplets with temperature and specific humidity.
	566	!-- Droplet condensation and evaporation is calculated within
	567	!-- advec_particles.
	568	IF ( cloud_droplets .AND. &
	569	intermediate_timestep_count == intermediate_timestep_count_max )&
	570	THEN
	571	CALL interaction_droplets_ptq
	572	ENDIF
	573
	574	!
	575	!-- Exchange of ghost points (lateral boundary conditions)
[1128]	576	IF ( .NOT. background_communication ) THEN
[1113]	577
[1128]	578	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'start' )
[1113]	579
[1128]	580	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	581	on_device = .TRUE. ! to be removed after complete porting
	582	ELSE ! of ghost point exchange
	583	!$acc update host( e_p, pt_p, u_p, v_p, w_p )
[1053]	584	ENDIF
[1]	585
[1128]	586	CALL exchange_horiz( u_p, nbgp )
	587	CALL exchange_horiz( v_p, nbgp )
	588	CALL exchange_horiz( w_p, nbgp )
	589	CALL exchange_horiz( pt_p, nbgp )
	590	IF ( .NOT. constant_diffusion ) CALL exchange_horiz( e_p, nbgp )
	591	IF ( ocean ) THEN
	592	CALL exchange_horiz( sa_p, nbgp )
	593	CALL exchange_horiz( rho, nbgp )
	594	CALL exchange_horiz( prho, nbgp )
	595	ENDIF
	596	IF (humidity .OR. passive_scalar) THEN
	597	CALL exchange_horiz( q_p, nbgp )
[1179]	598	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	599	precipitation ) THEN
[1128]	600	CALL exchange_horiz( qr_p, nbgp )
	601	CALL exchange_horiz( nr_p, nbgp )
	602	ENDIF
	603	ENDIF
	604	IF ( cloud_droplets ) THEN
	605	CALL exchange_horiz( ql, nbgp )
	606	CALL exchange_horiz( ql_c, nbgp )
	607	CALL exchange_horiz( ql_v, nbgp )
	608	CALL exchange_horiz( ql_vp, nbgp )
	609	ENDIF
[1671]	610	IF ( wang_kernel .OR. turbulence .OR. use_sgs_for_particles ) &
	611	THEN
	612	CALL exchange_horiz( diss, nbgp )
	613	ENDIF
[1128]	614
	615	IF ( numprocs == 1 ) THEN ! workaround for single-core GPU runs
	616	on_device = .FALSE. ! to be removed after complete porting
	617	ELSE ! of ghost point exchange
	618	!$acc update device( e_p, pt_p, u_p, v_p, w_p )
	619	ENDIF
	620
	621	CALL cpu_log( log_point(26), 'exchange-horiz-progn', 'stop' )
	622
[1113]	623	ENDIF
	624
[1]	625	!
	626	!-- Boundary conditions for the prognostic quantities (except of the
	627	!-- velocities at the outflow in case of a non-cyclic lateral wall)
[1113]	628	CALL boundary_conds
[1]	629
	630	!
[1496]	631	!-- When using the land surface model:
	632	!-- 1) solve energy balance equation to calculate new skin temperature
	633	!-- 2) run soil model
	634	IF ( land_surface ) THEN
	635
	636	CALL cpu_log( log_point(54), 'land_surface', 'start' )
	637
	638	CALL lsm_energy_balance
	639	CALL lsm_soil_model
	640
	641	CALL cpu_log( log_point(54), 'land_surface', 'stop' )
	642
	643	ENDIF
	644
	645	!
[73]	646	!-- Swap the time levels in preparation for the next time step.
	647	CALL swap_timelevel
	648
	649	!
[1]	650	!-- Temperature offset must be imposed at cyclic boundaries in x-direction
	651	!-- when a sloping surface is used
	652	IF ( sloping_surface ) THEN
[707]	653	IF ( nxl == 0 ) pt(:,:,nxlg:nxl-1) = pt(:,:,nxlg:nxl-1) - &
	654	pt_slope_offset
	655	IF ( nxr == nx ) pt(:,:,nxr+1:nxrg) = pt(:,:,nxr+1:nxrg) + &
	656	pt_slope_offset
[1]	657	ENDIF
	658
	659	!
[151]	660	!-- Impose a turbulent inflow using the recycling method
	661	IF ( turbulent_inflow ) CALL inflow_turbulence
	662
	663	!
[1]	664	!-- Impose a random perturbation on the horizontal velocity field
[106]	665	IF ( create_disturbances .AND. &
	666	( call_psolver_at_all_substeps .AND. &
[1]	667	intermediate_timestep_count == intermediate_timestep_count_max )&
[106]	668	.OR. ( .NOT. call_psolver_at_all_substeps .AND. &
	669	intermediate_timestep_count == 1 ) ) &
[1]	670	THEN
	671	time_disturb = time_disturb + dt_3d
	672	IF ( time_disturb >= dt_disturb ) THEN
[1111]	673	!$acc update host( u, v )
[1113]	674	IF ( numprocs == 1 ) on_device = .FALSE. ! workaround, remove later
[87]	675	IF ( hom(nzb+5,1,pr_palm,0) < disturbance_energy_limit ) THEN
[75]	676	CALL disturb_field( nzb_u_inner, tend, u )
	677	CALL disturb_field( nzb_v_inner, tend, v )
[707]	678	ELSEIF ( .NOT. bc_lr_cyc .OR. .NOT. bc_ns_cyc ) THEN
[1]	679	!
	680	!-- Runs with a non-cyclic lateral wall need perturbations
	681	!-- near the inflow throughout the whole simulation
	682	dist_range = 1
[75]	683	CALL disturb_field( nzb_u_inner, tend, u )
	684	CALL disturb_field( nzb_v_inner, tend, v )
[1]	685	dist_range = 0
	686	ENDIF
[1113]	687	IF ( numprocs == 1 ) on_device = .TRUE. ! workaround, remove later
[1111]	688	!$acc update device( u, v )
[1]	689	time_disturb = time_disturb - dt_disturb
	690	ENDIF
	691	ENDIF
	692
	693	!
	694	!-- Reduce the velocity divergence via the equation for perturbation
	695	!-- pressure.
[106]	696	IF ( intermediate_timestep_count == 1 .OR. &
	697	call_psolver_at_all_substeps ) THEN
[1]	698	CALL pres
	699	ENDIF
	700
	701	!
	702	!-- If required, compute liquid water content
[1015]	703	IF ( cloud_physics ) THEN
	704	CALL calc_liquid_water_content
	705	!$acc update device( ql )
	706	ENDIF
[1115]	707	!
	708	!-- If required, compute virtual potential temperature
	709	IF ( humidity ) THEN
	710	CALL compute_vpt
	711	!$acc update device( vpt )
	712	ENDIF
[1585]	713
[1]	714	!
	715	!-- Compute the diffusion quantities
	716	IF ( .NOT. constant_diffusion ) THEN
	717
	718	!
[1276]	719	!-- Determine surface fluxes shf and qsws and surface values
	720	!-- pt_surface and q_surface in dependence on data from external
	721	!-- file LSF_DATA respectively
	722	IF ( ( large_scale_forcing .AND. lsf_surf ) .AND. &
	723	intermediate_timestep_count == intermediate_timestep_count_max )&
	724	THEN
	725	CALL ls_forcing_surf ( simulated_time )
	726	ENDIF
	727
	728	!
[1]	729	!-- First the vertical fluxes in the Prandtl layer are being computed
	730	IF ( prandtl_layer ) THEN
	731	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'start' )
	732	CALL prandtl_fluxes
	733	CALL cpu_log( log_point(19), 'prandtl_fluxes', 'stop' )
	734	ENDIF
[1241]	735
[1]	736	!
	737	!-- Compute the diffusion coefficients
	738	CALL cpu_log( log_point(17), 'diffusivities', 'start' )
[75]	739	IF ( .NOT. humidity ) THEN
[97]	740	IF ( ocean ) THEN
[388]	741	CALL diffusivities( prho, prho_reference )
[97]	742	ELSE
	743	CALL diffusivities( pt, pt_reference )
	744	ENDIF
[1]	745	ELSE
[97]	746	CALL diffusivities( vpt, pt_reference )
[1]	747	ENDIF
	748	CALL cpu_log( log_point(17), 'diffusivities', 'stop' )
	749
	750	ENDIF
	751
	752	ENDDO ! Intermediate step loop
	753
	754	!
	755	!-- Increase simulation time and output times
[1111]	756	nr_timesteps_this_run = nr_timesteps_this_run + 1
[291]	757	current_timestep_number = current_timestep_number + 1
	758	simulated_time = simulated_time + dt_3d
	759	simulated_time_chr = time_to_string( simulated_time )
	760	time_since_reference_point = simulated_time - coupling_start_time
	761
[1]	762	IF ( simulated_time >= skip_time_data_output_av ) THEN
	763	time_do_av = time_do_av + dt_3d
	764	ENDIF
	765	IF ( simulated_time >= skip_time_do2d_xy ) THEN
	766	time_do2d_xy = time_do2d_xy + dt_3d
	767	ENDIF
	768	IF ( simulated_time >= skip_time_do2d_xz ) THEN
	769	time_do2d_xz = time_do2d_xz + dt_3d
	770	ENDIF
	771	IF ( simulated_time >= skip_time_do2d_yz ) THEN
	772	time_do2d_yz = time_do2d_yz + dt_3d
	773	ENDIF
	774	IF ( simulated_time >= skip_time_do3d ) THEN
	775	time_do3d = time_do3d + dt_3d
	776	ENDIF
[410]	777	DO mid = 1, masks
	778	IF ( simulated_time >= skip_time_domask(mid) ) THEN
	779	time_domask(mid)= time_domask(mid) + dt_3d
	780	ENDIF
	781	ENDDO
[1]	782	time_dvrp = time_dvrp + dt_3d
	783	IF ( simulated_time >= skip_time_dosp ) THEN
	784	time_dosp = time_dosp + dt_3d
	785	ENDIF
	786	time_dots = time_dots + dt_3d
[849]	787	IF ( .NOT. first_call_lpm ) THEN
[1]	788	time_dopts = time_dopts + dt_3d
	789	ENDIF
	790	IF ( simulated_time >= skip_time_dopr ) THEN
	791	time_dopr = time_dopr + dt_3d
	792	ENDIF
	793	time_dopr_listing = time_dopr_listing + dt_3d
	794	time_run_control = time_run_control + dt_3d
	795
	796	!
[102]	797	!-- Data exchange between coupled models
[291]	798	IF ( coupling_mode /= 'uncoupled' .AND. run_coupled ) THEN
[102]	799	time_coupling = time_coupling + dt_3d
[343]	800
[108]	801	!
	802	!-- In case of model termination initiated by the local model
	803	!-- (terminate_coupled > 0), the coupler must be skipped because it would
	804	!-- cause an MPI intercomminucation hang.
	805	!-- If necessary, the coupler will be called at the beginning of the
	806	!-- next restart run.
	807	DO WHILE ( time_coupling >= dt_coupling .AND. terminate_coupled == 0 )
[102]	808	CALL surface_coupler
	809	time_coupling = time_coupling - dt_coupling
	810	ENDDO
	811	ENDIF
	812
	813	!
[46]	814	!-- Execute user-defined actions
	815	CALL user_actions( 'after_integration' )
	816
	817	!
[1]	818	!-- If Galilei transformation is used, determine the distance that the
	819	!-- model has moved so far
	820	IF ( galilei_transformation ) THEN
	821	advected_distance_x = advected_distance_x + u_gtrans * dt_3d
	822	advected_distance_y = advected_distance_y + v_gtrans * dt_3d
	823	ENDIF
	824
	825	!
	826	!-- Check, if restart is necessary (because cpu-time is expiring or
	827	!-- because it is forced by user) and set stop flag
[108]	828	!-- This call is skipped if the remote model has already initiated a restart.
	829	IF ( .NOT. terminate_run ) CALL check_for_restart
[1]	830
	831	!
	832	!-- Carry out statistical analysis and output at the requested output times.
	833	!-- The MOD function is used for calculating the output time counters (like
	834	!-- time_dopr) in order to regard a possible decrease of the output time
	835	!-- interval in case of restart runs
	836
	837	!
	838	!-- Set a flag indicating that so far no statistics have been created
	839	!-- for this time step
	840	flow_statistics_called = .FALSE.
	841
	842	!
	843	!-- If required, call flow_statistics for averaging in time
[1342]	844	IF ( averaging_interval_pr /= 0.0_wp .AND. &
[1]	845	( dt_dopr - time_dopr ) <= averaging_interval_pr .AND. &
	846	simulated_time >= skip_time_dopr ) THEN
	847	time_dopr_av = time_dopr_av + dt_3d
	848	IF ( time_dopr_av >= dt_averaging_input_pr ) THEN
	849	do_sum = .TRUE.
	850	time_dopr_av = MOD( time_dopr_av, &
	851	MAX( dt_averaging_input_pr, dt_3d ) )
	852	ENDIF
	853	ENDIF
	854	IF ( do_sum ) CALL flow_statistics
	855
	856	!
[410]	857	!-- Sum-up 3d-arrays for later output of time-averaged 2d/3d/masked data
[1342]	858	IF ( averaging_interval /= 0.0_wp .AND. &
[1]	859	( dt_data_output_av - time_do_av ) <= averaging_interval .AND. &
	860	simulated_time >= skip_time_data_output_av ) &
	861	THEN
	862	time_do_sla = time_do_sla + dt_3d
	863	IF ( time_do_sla >= dt_averaging_input ) THEN
	864	CALL sum_up_3d_data
	865	average_count_3d = average_count_3d + 1
	866	time_do_sla = MOD( time_do_sla, MAX( dt_averaging_input, dt_3d ) )
	867	ENDIF
	868	ENDIF
	869
	870	!
	871	!-- Calculate spectra for time averaging
[1342]	872	IF ( averaging_interval_sp /= 0.0_wp .AND. &
[1]	873	( dt_dosp - time_dosp ) <= averaging_interval_sp .AND. &
	874	simulated_time >= skip_time_dosp ) THEN
	875	time_dosp_av = time_dosp_av + dt_3d
	876	IF ( time_dosp_av >= dt_averaging_input_pr ) THEN
	877	CALL calc_spectra
	878	time_dosp_av = MOD( time_dosp_av, &
	879	MAX( dt_averaging_input_pr, dt_3d ) )
	880	ENDIF
	881	ENDIF
	882
	883	!
	884	!-- Computation and output of run control parameters.
[1001]	885	!-- This is also done whenever perturbations have been imposed
[1]	886	IF ( time_run_control >= dt_run_control .OR. &
[1001]	887	timestep_scheme(1:5) /= 'runge' .OR. disturbance_created ) &
[1]	888	THEN
	889	CALL run_control
	890	IF ( time_run_control >= dt_run_control ) THEN
	891	time_run_control = MOD( time_run_control, &
	892	MAX( dt_run_control, dt_3d ) )
	893	ENDIF
	894	ENDIF
	895
	896	!
	897	!-- Profile output (ASCII) on file
	898	IF ( time_dopr_listing >= dt_dopr_listing ) THEN
	899	CALL print_1d
	900	time_dopr_listing = MOD( time_dopr_listing, MAX( dt_dopr_listing, &
	901	dt_3d ) )
	902	ENDIF
	903
	904	!
	905	!-- Graphic output for PROFIL
	906	IF ( time_dopr >= dt_dopr ) THEN
	907	IF ( dopr_n /= 0 ) CALL data_output_profiles
	908	time_dopr = MOD( time_dopr, MAX( dt_dopr, dt_3d ) )
[1342]	909	time_dopr_av = 0.0_wp ! due to averaging (see above)
[1]	910	ENDIF
	911
	912	!
	913	!-- Graphic output for time series
	914	IF ( time_dots >= dt_dots ) THEN
[48]	915	CALL data_output_tseries
[1]	916	time_dots = MOD( time_dots, MAX( dt_dots, dt_3d ) )
	917	ENDIF
	918
	919	!
	920	!-- Output of spectra (formatted for use with PROFIL), in case of no
	921	!-- time averaging, spectra has to be calculated before
	922	IF ( time_dosp >= dt_dosp ) THEN
	923	IF ( average_count_sp == 0 ) CALL calc_spectra
	924	CALL data_output_spectra
	925	time_dosp = MOD( time_dosp, MAX( dt_dosp, dt_3d ) )
	926	ENDIF
	927
	928	!
	929	!-- 2d-data output (cross-sections)
	930	IF ( time_do2d_xy >= dt_do2d_xy ) THEN
	931	CALL data_output_2d( 'xy', 0 )
	932	time_do2d_xy = MOD( time_do2d_xy, MAX( dt_do2d_xy, dt_3d ) )
	933	ENDIF
	934	IF ( time_do2d_xz >= dt_do2d_xz ) THEN
	935	CALL data_output_2d( 'xz', 0 )
	936	time_do2d_xz = MOD( time_do2d_xz, MAX( dt_do2d_xz, dt_3d ) )
	937	ENDIF
	938	IF ( time_do2d_yz >= dt_do2d_yz ) THEN
	939	CALL data_output_2d( 'yz', 0 )
	940	time_do2d_yz = MOD( time_do2d_yz, MAX( dt_do2d_yz, dt_3d ) )
	941	ENDIF
	942
	943	!
	944	!-- 3d-data output (volume data)
	945	IF ( time_do3d >= dt_do3d ) THEN
	946	CALL data_output_3d( 0 )
	947	time_do3d = MOD( time_do3d, MAX( dt_do3d, dt_3d ) )
	948	ENDIF
	949
	950	!
[410]	951	!-- masked data output
[1308]	952	!-- Parallel netcdf output is not tested so far for masked data, hence
	953	!-- netcdf_data_format is switched back to non-paralell output.
	954	netcdf_data_format_save = netcdf_data_format
	955	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	956	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	957	DO mid = 1, masks
	958	IF ( time_domask(mid) >= dt_domask(mid) ) THEN
	959	CALL data_output_mask( 0 )
	960	time_domask(mid) = MOD( time_domask(mid), &
	961	MAX( dt_domask(mid), dt_3d ) )
	962	ENDIF
	963	ENDDO
[1308]	964	netcdf_data_format = netcdf_data_format_save
[410]	965
	966	!
	967	!-- Output of time-averaged 2d/3d/masked data
[1]	968	IF ( time_do_av >= dt_data_output_av ) THEN
	969	CALL average_3d_data
	970	CALL data_output_2d( 'xy', 1 )
	971	CALL data_output_2d( 'xz', 1 )
	972	CALL data_output_2d( 'yz', 1 )
	973	CALL data_output_3d( 1 )
[1308]	974	!-- Parallel netcdf output is not tested so far for masked data, hence
	975	!-- netcdf_data_format is switched back to non-paralell output.
	976	netcdf_data_format_save = netcdf_data_format
	977	IF ( netcdf_data_format == 5 ) netcdf_data_format = 3
	978	IF ( netcdf_data_format == 6 ) netcdf_data_format = 4
[410]	979	DO mid = 1, masks
	980	CALL data_output_mask( 1 )
	981	ENDDO
[1308]	982	netcdf_data_format = netcdf_data_format_save
[1]	983	time_do_av = MOD( time_do_av, MAX( dt_data_output_av, dt_3d ) )
	984	ENDIF
	985
	986	!
	987	!-- Output of particle time series
[253]	988	IF ( particle_advection ) THEN
	989	IF ( time_dopts >= dt_dopts .OR. &
	990	( simulated_time >= particle_advection_start .AND. &
[849]	991	first_call_lpm ) ) THEN
[253]	992	CALL data_output_ptseries
	993	time_dopts = MOD( time_dopts, MAX( dt_dopts, dt_3d ) )
	994	ENDIF
[1]	995	ENDIF
	996
	997	!
	998	!-- Output of dvrp-graphics (isosurface, particles, slicer)
	999	#if defined( __dvrp_graphics )
	1000	CALL DVRP_LOG_EVENT( -2, current_timestep_number-1 )
	1001	#endif
	1002	IF ( time_dvrp >= dt_dvrp ) THEN
	1003	CALL data_output_dvrp
	1004	time_dvrp = MOD( time_dvrp, MAX( dt_dvrp, dt_3d ) )
	1005	ENDIF
	1006	#if defined( __dvrp_graphics )
	1007	CALL DVRP_LOG_EVENT( 2, current_timestep_number )
	1008	#endif
	1009
	1010	!
	1011	!-- If required, set the heat flux for the next time step at a random value
	1012	IF ( constant_heatflux .AND. random_heatflux ) CALL disturb_heatflux
	1013
	1014	!
	1015	!-- Execute user-defined actions
	1016	CALL user_actions( 'after_timestep' )
	1017
[1402]	1018	!
	1019	!-- Output elapsed simulated time in form of a progress bar on stdout
	1020	IF ( myid == 0 ) CALL output_progress_bar
	1021
[1]	1022	CALL cpu_log( log_point_s(10), 'timesteps', 'stop' )
	1023
[667]	1024
[1]	1025	ENDDO ! time loop
	1026
[1402]	1027	IF ( myid == 0 ) CALL finish_progress_bar
	1028
[1]	1029	#if defined( __dvrp_graphics )
	1030	CALL DVRP_LOG_EVENT( -2, current_timestep_number )
	1031	#endif
	1032
[1402]	1033	CALL location_message( 'finished time-stepping', .TRUE. )
[1384]	1034
[1]	1035	END SUBROUTINE time_integration

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