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source: palm/trunk/SOURCE/boundary_conds.f90 @ 1823

Last change on this file since 1823 was 1823, checked in by hoffmann, 8 years ago
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[1682]	1	!> @file boundary_conds.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	!
[1818]	16	! Copyright 1997-2016 Leibniz Universitaet Hannover
[1036]	17	!--------------------------------------------------------------------------------!
	18	!
[484]	19	! Current revisions:
[1]	20	! -----------------
[1718]	21	!
[1823]	22	!
[1321]	23	! Former revisions:
	24	! -----------------
	25	! $Id: boundary_conds.f90 1823 2016-04-07 08:57:52Z hoffmann $
	26	!
[1823]	27	! 1822 2016-04-07 07:49:42Z hoffmann
	28	! icloud_scheme removed. microphyisics_seifert added.
	29	!
[1765]	30	! 1764 2016-02-28 12:45:19Z raasch
	31	! index bug for u_p at left outflow removed
	32	!
[1763]	33	! 1762 2016-02-25 12:31:13Z hellstea
	34	! Introduction of nested domain feature
	35	!
[1744]	36	! 1742 2016-01-13 09:50:06Z raasch
	37	! bugfix for outflow Neumann boundary conditions at bottom and top
	38	!
[1718]	39	! 1717 2015-11-11 15:09:47Z raasch
	40	! Bugfix: index error in outflow conditions for left boundary
	41	!
[1683]	42	! 1682 2015-10-07 23:56:08Z knoop
	43	! Code annotations made doxygen readable
	44	!
[1717]	45	! 1410 2014-05-23 12:16:18Z suehring
[1463]	46	! Bugfix: set dirichlet boundary condition for passive_scalar at model domain
	47	! top
	48	!
[1410]	49	! 1399 2014-05-07 11:16:25Z heinze
	50	! Bugfix: set inflow boundary conditions also if no humidity or passive_scalar
	51	! is used.
	52	!
[1399]	53	! 1398 2014-05-07 11:15:00Z heinze
	54	! Dirichlet-condition at the top for u and v changed to u_init and v_init also
	55	! for large_scale_forcing
	56	!
[1381]	57	! 1380 2014-04-28 12:40:45Z heinze
	58	! Adjust Dirichlet-condition at the top for pt in case of nudging
	59	!
[1362]	60	! 1361 2014-04-16 15:17:48Z hoffmann
	61	! Bottom and top boundary conditions of rain water content (qr) and
	62	! rain drop concentration (nr) changed to Dirichlet
	63	!
[1354]	64	! 1353 2014-04-08 15:21:23Z heinze
	65	! REAL constants provided with KIND-attribute
	66	!
[1321]	67	! 1320 2014-03-20 08:40:49Z raasch
[1320]	68	! ONLY-attribute added to USE-statements,
	69	! kind-parameters added to all INTEGER and REAL declaration statements,
	70	! kinds are defined in new module kinds,
	71	! revision history before 2012 removed,
	72	! comment fields (!:) to be used for variable explanations added to
	73	! all variable declaration statements
[1160]	74	!
[1258]	75	! 1257 2013-11-08 15:18:40Z raasch
	76	! loop independent clauses added
	77	!
[1242]	78	! 1241 2013-10-30 11:36:58Z heinze
	79	! Adjust ug and vg at each timestep in case of large_scale_forcing
	80	!
[1160]	81	! 1159 2013-05-21 11:58:22Z fricke
[1159]	82	! Bugfix: Neumann boundary conditions for the velocity components at the
	83	! outflow are in fact radiation boundary conditions using the maximum phase
	84	! velocity that ensures numerical stability (CFL-condition).
	85	! Hence, logical operator use_cmax is now used instead of bc_lr_dirneu/_neudir.
	86	! Bugfix: In case of use_cmax at the outflow, u, v, w are replaced by
	87	! u_p, v_p, w_p
[1116]	88	!
	89	! 1115 2013-03-26 18:16:16Z hoffmann
	90	! boundary conditions of two-moment cloud scheme are restricted to Neumann-
	91	! boundary-conditions
	92	!
[1114]	93	! 1113 2013-03-10 02:48:14Z raasch
	94	! GPU-porting
	95	! dummy argument "range" removed
	96	! Bugfix: wrong index in loops of radiation boundary condition
[1113]	97	!
[1054]	98	! 1053 2012-11-13 17:11:03Z hoffmann
	99	! boundary conditions for the two new prognostic equations (nr, qr) of the
	100	! two-moment cloud scheme
	101	!
[1037]	102	! 1036 2012-10-22 13:43:42Z raasch
	103	! code put under GPL (PALM 3.9)
	104	!
[997]	105	! 996 2012-09-07 10:41:47Z raasch
	106	! little reformatting
	107	!
[979]	108	! 978 2012-08-09 08:28:32Z fricke
	109	! Neumann boudnary conditions are added at the inflow boundary for the SGS-TKE.
	110	! Outflow boundary conditions for the velocity components can be set to Neumann
	111	! conditions or to radiation conditions with a horizontal averaged phase
	112	! velocity.
	113	!
[876]	114	! 875 2012-04-02 15:35:15Z gryschka
	115	! Bugfix in case of dirichlet inflow bc at the right or north boundary
	116	!
[1]	117	! Revision 1.1 1997/09/12 06:21:34 raasch
	118	! Initial revision
	119	!
	120	!
	121	! Description:
	122	! ------------
[1682]	123	!> Boundary conditions for the prognostic quantities.
	124	!> One additional bottom boundary condition is applied for the TKE (=(u)*2)
	125	!> in prandtl_fluxes. The cyclic lateral boundary conditions are implicitly
	126	!> handled in routine exchange_horiz. Pressure boundary conditions are
	127	!> explicitly set in routines pres, poisfft, poismg and sor.
[1]	128	!------------------------------------------------------------------------------!
[1682]	129	SUBROUTINE boundary_conds
	130
[1]	131
[1320]	132	USE arrays_3d, &
	133	ONLY: c_u, c_u_m, c_u_m_l, c_v, c_v_m, c_v_m_l, c_w, c_w_m, c_w_m_l, &
	134	dzu, e_p, nr_p, pt, pt_p, q, q_p, qr_p, sa, sa_p, &
	135	u, ug, u_init, u_m_l, u_m_n, u_m_r, u_m_s, u_p, &
	136	v, vg, v_init, v_m_l, v_m_n, v_m_r, v_m_s, v_p, &
[1380]	137	w, w_p, w_m_l, w_m_n, w_m_r, w_m_s,&
	138	pt_init
[1320]	139
	140	USE control_parameters, &
	141	ONLY: bc_pt_t_val, bc_q_t_val, constant_diffusion, &
	142	cloud_physics, dt_3d, humidity, &
[1462]	143	ibc_pt_b, ibc_pt_t, ibc_q_b, ibc_q_t, ibc_sa_t, ibc_uv_b, &
[1822]	144	ibc_uv_t, inflow_l, inflow_n, inflow_r, inflow_s, &
	145	intermediate_timestep_count, large_scale_forcing, &
	146	microphysics_seifert, nest_domain, nest_bound_l, nest_bound_s, &
	147	nudging, ocean, outflow_l, outflow_n, outflow_r, outflow_s, &
	148	passive_scalar, tsc, use_cmax
[1320]	149
	150	USE grid_variables, &
	151	ONLY: ddx, ddy, dx, dy
	152
	153	USE indices, &
	154	ONLY: nx, nxl, nxlg, nxr, nxrg, ny, nyn, nyng, nys, nysg, &
	155	nzb, nzb_s_inner, nzb_w_inner, nzt
	156
	157	USE kinds
	158
[1]	159	USE pegrid
	160
[1320]	161
[1]	162	IMPLICIT NONE
	163
[1682]	164	INTEGER(iwp) :: i !<
	165	INTEGER(iwp) :: j !<
	166	INTEGER(iwp) :: k !<
[1]	167
[1682]	168	REAL(wp) :: c_max !<
	169	REAL(wp) :: denom !<
[1]	170
[73]	171
[1]	172	!
[1113]	173	!-- Bottom boundary
	174	IF ( ibc_uv_b == 1 ) THEN
	175	!$acc kernels present( u_p, v_p )
	176	u_p(nzb,:,:) = u_p(nzb+1,:,:)
	177	v_p(nzb,:,:) = v_p(nzb+1,:,:)
	178	!$acc end kernels
	179	ENDIF
	180
	181	!$acc kernels present( nzb_w_inner, w_p )
	182	DO i = nxlg, nxrg
	183	DO j = nysg, nyng
[1353]	184	w_p(nzb_w_inner(j,i),j,i) = 0.0_wp
[1113]	185	ENDDO
	186	ENDDO
	187	!$acc end kernels
	188
	189	!
[1762]	190	!-- Top boundary. A nested domain ( ibc_uv_t = 3 ) does not require settings.
[1113]	191	IF ( ibc_uv_t == 0 ) THEN
	192	!$acc kernels present( u_init, u_p, v_init, v_p )
	193	u_p(nzt+1,:,:) = u_init(nzt+1)
	194	v_p(nzt+1,:,:) = v_init(nzt+1)
	195	!$acc end kernels
[1762]	196	ELSEIF ( ibc_uv_t == 1 ) THEN
[1113]	197	!$acc kernels present( u_p, v_p )
	198	u_p(nzt+1,:,:) = u_p(nzt,:,:)
	199	v_p(nzt+1,:,:) = v_p(nzt,:,:)
	200	!$acc end kernels
	201	ENDIF
	202
[1762]	203	IF ( .NOT. nest_domain ) THEN
	204	!$acc kernels present( w_p )
	205	w_p(nzt:nzt+1,:,:) = 0.0_wp ! nzt is not a prognostic level (but cf. pres)
	206	!$acc end kernels
	207	ENDIF
	208
[1113]	209	!
	210	!-- Temperature at bottom boundary.
	211	!-- In case of coupled runs (ibc_pt_b = 2) the temperature is given by
	212	!-- the sea surface temperature of the coupled ocean model.
	213	IF ( ibc_pt_b == 0 ) THEN
	214	!$acc kernels present( nzb_s_inner, pt, pt_p )
[1257]	215	!$acc loop independent
[667]	216	DO i = nxlg, nxrg
[1257]	217	!$acc loop independent
[667]	218	DO j = nysg, nyng
[1113]	219	pt_p(nzb_s_inner(j,i),j,i) = pt(nzb_s_inner(j,i),j,i)
[1]	220	ENDDO
	221	ENDDO
[1113]	222	!$acc end kernels
	223	ELSEIF ( ibc_pt_b == 1 ) THEN
	224	!$acc kernels present( nzb_s_inner, pt_p )
[1257]	225	!$acc loop independent
[1113]	226	DO i = nxlg, nxrg
[1257]	227	!$acc loop independent
[1113]	228	DO j = nysg, nyng
	229	pt_p(nzb_s_inner(j,i),j,i) = pt_p(nzb_s_inner(j,i)+1,j,i)
	230	ENDDO
	231	ENDDO
	232	!$acc end kernels
	233	ENDIF
[1]	234
	235	!
[1113]	236	!-- Temperature at top boundary
	237	IF ( ibc_pt_t == 0 ) THEN
	238	!$acc kernels present( pt, pt_p )
	239	pt_p(nzt+1,:,:) = pt(nzt+1,:,:)
[1380]	240	!
	241	!-- In case of nudging adjust top boundary to pt which is
	242	!-- read in from NUDGING-DATA
	243	IF ( nudging ) THEN
	244	pt_p(nzt+1,:,:) = pt_init(nzt+1)
	245	ENDIF
[1113]	246	!$acc end kernels
	247	ELSEIF ( ibc_pt_t == 1 ) THEN
	248	!$acc kernels present( pt_p )
	249	pt_p(nzt+1,:,:) = pt_p(nzt,:,:)
	250	!$acc end kernels
	251	ELSEIF ( ibc_pt_t == 2 ) THEN
	252	!$acc kernels present( dzu, pt_p )
	253	pt_p(nzt+1,:,:) = pt_p(nzt,:,:) + bc_pt_t_val * dzu(nzt+1)
	254	!$acc end kernels
	255	ENDIF
[1]	256
	257	!
[1113]	258	!-- Boundary conditions for TKE
	259	!-- Generally Neumann conditions with de/dz=0 are assumed
	260	IF ( .NOT. constant_diffusion ) THEN
	261	!$acc kernels present( e_p, nzb_s_inner )
[1257]	262	!$acc loop independent
[1113]	263	DO i = nxlg, nxrg
[1257]	264	!$acc loop independent
[1113]	265	DO j = nysg, nyng
	266	e_p(nzb_s_inner(j,i),j,i) = e_p(nzb_s_inner(j,i)+1,j,i)
[73]	267	ENDDO
[1113]	268	ENDDO
[1762]	269	IF ( .NOT. nest_domain ) THEN
	270	e_p(nzt+1,:,:) = e_p(nzt,:,:)
	271	ENDIF
[1113]	272	!$acc end kernels
	273	ENDIF
	274
	275	!
	276	!-- Boundary conditions for salinity
	277	IF ( ocean ) THEN
	278	!
	279	!-- Bottom boundary: Neumann condition because salinity flux is always
	280	!-- given
	281	DO i = nxlg, nxrg
	282	DO j = nysg, nyng
	283	sa_p(nzb_s_inner(j,i),j,i) = sa_p(nzb_s_inner(j,i)+1,j,i)
[1]	284	ENDDO
[1113]	285	ENDDO
[1]	286
	287	!
[1113]	288	!-- Top boundary: Dirichlet or Neumann
	289	IF ( ibc_sa_t == 0 ) THEN
	290	sa_p(nzt+1,:,:) = sa(nzt+1,:,:)
	291	ELSEIF ( ibc_sa_t == 1 ) THEN
	292	sa_p(nzt+1,:,:) = sa_p(nzt,:,:)
[1]	293	ENDIF
	294
[1113]	295	ENDIF
	296
[1]	297	!
[1113]	298	!-- Boundary conditions for total water content or scalar,
	299	!-- bottom and top boundary (see also temperature)
	300	IF ( humidity .OR. passive_scalar ) THEN
	301	!
	302	!-- Surface conditions for constant_humidity_flux
	303	IF ( ibc_q_b == 0 ) THEN
[667]	304	DO i = nxlg, nxrg
	305	DO j = nysg, nyng
[1113]	306	q_p(nzb_s_inner(j,i),j,i) = q(nzb_s_inner(j,i),j,i)
[1]	307	ENDDO
	308	ENDDO
[1113]	309	ELSE
[667]	310	DO i = nxlg, nxrg
	311	DO j = nysg, nyng
[1113]	312	q_p(nzb_s_inner(j,i),j,i) = q_p(nzb_s_inner(j,i)+1,j,i)
[95]	313	ENDDO
	314	ENDDO
[1113]	315	ENDIF
[95]	316	!
[1113]	317	!-- Top boundary
[1462]	318	IF ( ibc_q_t == 0 ) THEN
	319	q_p(nzt+1,:,:) = q(nzt+1,:,:)
	320	ELSEIF ( ibc_q_t == 1 ) THEN
	321	q_p(nzt+1,:,:) = q_p(nzt,:,:) + bc_q_t_val * dzu(nzt+1)
	322	ENDIF
[95]	323
[1822]	324	IF ( cloud_physics .AND. microphysics_seifert ) THEN
[1113]	325	!
[1361]	326	!-- Surface conditions rain water (Dirichlet)
[1115]	327	DO i = nxlg, nxrg
	328	DO j = nysg, nyng
[1361]	329	qr_p(nzb_s_inner(j,i),j,i) = 0.0_wp
	330	nr_p(nzb_s_inner(j,i),j,i) = 0.0_wp
[73]	331	ENDDO
[1115]	332	ENDDO
[1]	333	!
[1361]	334	!-- Top boundary condition for rain water (Dirichlet)
	335	qr_p(nzt+1,:,:) = 0.0_wp
	336	nr_p(nzt+1,:,:) = 0.0_wp
[1115]	337
[1]	338	ENDIF
[1409]	339	ENDIF
[1]	340	!
[1762]	341	!-- In case of inflow or nest boundary at the south boundary the boundary for v
	342	!-- is at nys and in case of inflow or nest boundary at the left boundary the
	343	!-- boundary for u is at nxl. Since in prognostic_equations (cache optimized
	344	!-- version) these levels are handled as a prognostic level, boundary values
	345	!-- have to be restored here.
[1409]	346	!-- For the SGS-TKE, Neumann boundary conditions are used at the inflow.
	347	IF ( inflow_s ) THEN
	348	v_p(:,nys,:) = v_p(:,nys-1,:)
	349	IF ( .NOT. constant_diffusion ) e_p(:,nys-1,:) = e_p(:,nys,:)
	350	ELSEIF ( inflow_n ) THEN
	351	IF ( .NOT. constant_diffusion ) e_p(:,nyn+1,:) = e_p(:,nyn,:)
	352	ELSEIF ( inflow_l ) THEN
	353	u_p(:,:,nxl) = u_p(:,:,nxl-1)
	354	IF ( .NOT. constant_diffusion ) e_p(:,:,nxl-1) = e_p(:,:,nxl)
	355	ELSEIF ( inflow_r ) THEN
	356	IF ( .NOT. constant_diffusion ) e_p(:,:,nxr+1) = e_p(:,:,nxr)
	357	ENDIF
[1]	358
	359	!
[1762]	360	!-- The same restoration for u at i=nxl and v at j=nys as above must be made
	361	!-- in case of nest boundaries. Note however, that the above ELSEIF-structure is
	362	!-- not appropriate here as there may be more than one nest boundary on a
	363	!-- PE-domain. Furthermore Neumann conditions for SGS-TKE are not required here.
	364	IF ( nest_bound_s ) THEN
	365	v_p(:,nys,:) = v_p(:,nys-1,:)
	366	ENDIF
	367	IF ( nest_bound_l ) THEN
	368	u_p(:,:,nxl) = u_p(:,:,nxl-1)
	369	ENDIF
	370
	371	!
[1409]	372	!-- Lateral boundary conditions for scalar quantities at the outflow
	373	IF ( outflow_s ) THEN
	374	pt_p(:,nys-1,:) = pt_p(:,nys,:)
	375	IF ( .NOT. constant_diffusion ) e_p(:,nys-1,:) = e_p(:,nys,:)
	376	IF ( humidity .OR. passive_scalar ) THEN
	377	q_p(:,nys-1,:) = q_p(:,nys,:)
[1822]	378	IF ( cloud_physics .AND. microphysics_seifert ) THEN
[1409]	379	qr_p(:,nys-1,:) = qr_p(:,nys,:)
	380	nr_p(:,nys-1,:) = nr_p(:,nys,:)
[1053]	381	ENDIF
[1409]	382	ENDIF
	383	ELSEIF ( outflow_n ) THEN
	384	pt_p(:,nyn+1,:) = pt_p(:,nyn,:)
	385	IF ( .NOT. constant_diffusion ) e_p(:,nyn+1,:) = e_p(:,nyn,:)
	386	IF ( humidity .OR. passive_scalar ) THEN
	387	q_p(:,nyn+1,:) = q_p(:,nyn,:)
[1822]	388	IF ( cloud_physics .AND. microphysics_seifert ) THEN
[1409]	389	qr_p(:,nyn+1,:) = qr_p(:,nyn,:)
	390	nr_p(:,nyn+1,:) = nr_p(:,nyn,:)
[1053]	391	ENDIF
[1409]	392	ENDIF
	393	ELSEIF ( outflow_l ) THEN
	394	pt_p(:,:,nxl-1) = pt_p(:,:,nxl)
	395	IF ( .NOT. constant_diffusion ) e_p(:,:,nxl-1) = e_p(:,:,nxl)
	396	IF ( humidity .OR. passive_scalar ) THEN
	397	q_p(:,:,nxl-1) = q_p(:,:,nxl)
[1822]	398	IF ( cloud_physics .AND. microphysics_seifert ) THEN
[1409]	399	qr_p(:,:,nxl-1) = qr_p(:,:,nxl)
	400	nr_p(:,:,nxl-1) = nr_p(:,:,nxl)
[1053]	401	ENDIF
[1409]	402	ENDIF
	403	ELSEIF ( outflow_r ) THEN
	404	pt_p(:,:,nxr+1) = pt_p(:,:,nxr)
	405	IF ( .NOT. constant_diffusion ) e_p(:,:,nxr+1) = e_p(:,:,nxr)
	406	IF ( humidity .OR. passive_scalar ) THEN
	407	q_p(:,:,nxr+1) = q_p(:,:,nxr)
[1822]	408	IF ( cloud_physics .AND. microphysics_seifert ) THEN
[1409]	409	qr_p(:,:,nxr+1) = qr_p(:,:,nxr)
	410	nr_p(:,:,nxr+1) = nr_p(:,:,nxr)
[1053]	411	ENDIF
[1]	412	ENDIF
	413	ENDIF
	414
	415	!
[1159]	416	!-- Radiation boundary conditions for the velocities at the respective outflow.
	417	!-- The phase velocity is either assumed to the maximum phase velocity that
	418	!-- ensures numerical stability (CFL-condition) or calculated after
	419	!-- Orlanski(1976) and averaged along the outflow boundary.
[106]	420	IF ( outflow_s ) THEN
[75]	421
[1159]	422	IF ( use_cmax ) THEN
	423	u_p(:,-1,:) = u(:,0,:)
	424	v_p(:,0,:) = v(:,1,:)
	425	w_p(:,-1,:) = w(:,0,:)
	426	ELSEIF ( .NOT. use_cmax ) THEN
[75]	427
[978]	428	c_max = dy / dt_3d
[75]	429
[1353]	430	c_u_m_l = 0.0_wp
	431	c_v_m_l = 0.0_wp
	432	c_w_m_l = 0.0_wp
[978]	433
[1353]	434	c_u_m = 0.0_wp
	435	c_v_m = 0.0_wp
	436	c_w_m = 0.0_wp
[978]	437
[75]	438	!
[996]	439	!-- Calculate the phase speeds for u, v, and w, first local and then
	440	!-- average along the outflow boundary.
	441	DO k = nzb+1, nzt+1
	442	DO i = nxl, nxr
[75]	443
[106]	444	denom = u_m_s(k,0,i) - u_m_s(k,1,i)
	445
[1353]	446	IF ( denom /= 0.0_wp ) THEN
[996]	447	c_u(k,i) = -c_max * ( u(k,0,i) - u_m_s(k,0,i) ) / ( denom * tsc(2) )
[1353]	448	IF ( c_u(k,i) < 0.0_wp ) THEN
	449	c_u(k,i) = 0.0_wp
[106]	450	ELSEIF ( c_u(k,i) > c_max ) THEN
	451	c_u(k,i) = c_max
	452	ENDIF
	453	ELSE
	454	c_u(k,i) = c_max
[75]	455	ENDIF
	456
[106]	457	denom = v_m_s(k,1,i) - v_m_s(k,2,i)
	458
[1353]	459	IF ( denom /= 0.0_wp ) THEN
[996]	460	c_v(k,i) = -c_max * ( v(k,1,i) - v_m_s(k,1,i) ) / ( denom * tsc(2) )
[1353]	461	IF ( c_v(k,i) < 0.0_wp ) THEN
	462	c_v(k,i) = 0.0_wp
[106]	463	ELSEIF ( c_v(k,i) > c_max ) THEN
	464	c_v(k,i) = c_max
	465	ENDIF
	466	ELSE
	467	c_v(k,i) = c_max
[75]	468	ENDIF
	469
[106]	470	denom = w_m_s(k,0,i) - w_m_s(k,1,i)
[75]	471
[1353]	472	IF ( denom /= 0.0_wp ) THEN
[996]	473	c_w(k,i) = -c_max * ( w(k,0,i) - w_m_s(k,0,i) ) / ( denom * tsc(2) )
[1353]	474	IF ( c_w(k,i) < 0.0_wp ) THEN
	475	c_w(k,i) = 0.0_wp
[106]	476	ELSEIF ( c_w(k,i) > c_max ) THEN
	477	c_w(k,i) = c_max
	478	ENDIF
	479	ELSE
	480	c_w(k,i) = c_max
[75]	481	ENDIF
[106]	482
[978]	483	c_u_m_l(k) = c_u_m_l(k) + c_u(k,i)
	484	c_v_m_l(k) = c_v_m_l(k) + c_v(k,i)
	485	c_w_m_l(k) = c_w_m_l(k) + c_w(k,i)
[106]	486
[978]	487	ENDDO
	488	ENDDO
[75]	489
[978]	490	#if defined( __parallel )
	491	IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr )
	492	CALL MPI_ALLREDUCE( c_u_m_l(nzb+1), c_u_m(nzb+1), nzt-nzb, MPI_REAL, &
	493	MPI_SUM, comm1dx, ierr )
	494	IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr )
	495	CALL MPI_ALLREDUCE( c_v_m_l(nzb+1), c_v_m(nzb+1), nzt-nzb, MPI_REAL, &
	496	MPI_SUM, comm1dx, ierr )
	497	IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr )
	498	CALL MPI_ALLREDUCE( c_w_m_l(nzb+1), c_w_m(nzb+1), nzt-nzb, MPI_REAL, &
	499	MPI_SUM, comm1dx, ierr )
	500	#else
	501	c_u_m = c_u_m_l
	502	c_v_m = c_v_m_l
	503	c_w_m = c_w_m_l
	504	#endif
	505
	506	c_u_m = c_u_m / (nx+1)
	507	c_v_m = c_v_m / (nx+1)
	508	c_w_m = c_w_m / (nx+1)
	509
[75]	510	!
[978]	511	!-- Save old timelevels for the next timestep
	512	IF ( intermediate_timestep_count == 1 ) THEN
	513	u_m_s(:,:,:) = u(:,0:1,:)
	514	v_m_s(:,:,:) = v(:,1:2,:)
	515	w_m_s(:,:,:) = w(:,0:1,:)
	516	ENDIF
	517
	518	!
	519	!-- Calculate the new velocities
[996]	520	DO k = nzb+1, nzt+1
	521	DO i = nxlg, nxrg
[978]	522	u_p(k,-1,i) = u(k,-1,i) - dt_3d * tsc(2) * c_u_m(k) * &
[75]	523	( u(k,-1,i) - u(k,0,i) ) * ddy
	524
[978]	525	v_p(k,0,i) = v(k,0,i) - dt_3d * tsc(2) * c_v_m(k) * &
[106]	526	( v(k,0,i) - v(k,1,i) ) * ddy
[75]	527
[978]	528	w_p(k,-1,i) = w(k,-1,i) - dt_3d * tsc(2) * c_w_m(k) * &
[75]	529	( w(k,-1,i) - w(k,0,i) ) * ddy
[978]	530	ENDDO
[75]	531	ENDDO
	532
	533	!
[978]	534	!-- Bottom boundary at the outflow
	535	IF ( ibc_uv_b == 0 ) THEN
[1353]	536	u_p(nzb,-1,:) = 0.0_wp
	537	v_p(nzb,0,:) = 0.0_wp
[978]	538	ELSE
	539	u_p(nzb,-1,:) = u_p(nzb+1,-1,:)
	540	v_p(nzb,0,:) = v_p(nzb+1,0,:)
	541	ENDIF
[1353]	542	w_p(nzb,-1,:) = 0.0_wp
[73]	543
[75]	544	!
[978]	545	!-- Top boundary at the outflow
	546	IF ( ibc_uv_t == 0 ) THEN
	547	u_p(nzt+1,-1,:) = u_init(nzt+1)
	548	v_p(nzt+1,0,:) = v_init(nzt+1)
	549	ELSE
[1742]	550	u_p(nzt+1,-1,:) = u_p(nzt,-1,:)
	551	v_p(nzt+1,0,:) = v_p(nzt,0,:)
[978]	552	ENDIF
[1353]	553	w_p(nzt:nzt+1,-1,:) = 0.0_wp
[978]	554
[75]	555	ENDIF
[73]	556
[75]	557	ENDIF
[73]	558
[106]	559	IF ( outflow_n ) THEN
[73]	560
[1159]	561	IF ( use_cmax ) THEN
	562	u_p(:,ny+1,:) = u(:,ny,:)
	563	v_p(:,ny+1,:) = v(:,ny,:)
	564	w_p(:,ny+1,:) = w(:,ny,:)
	565	ELSEIF ( .NOT. use_cmax ) THEN
[75]	566
[978]	567	c_max = dy / dt_3d
[75]	568
[1353]	569	c_u_m_l = 0.0_wp
	570	c_v_m_l = 0.0_wp
	571	c_w_m_l = 0.0_wp
[978]	572
[1353]	573	c_u_m = 0.0_wp
	574	c_v_m = 0.0_wp
	575	c_w_m = 0.0_wp
[978]	576
[1]	577	!
[996]	578	!-- Calculate the phase speeds for u, v, and w, first local and then
	579	!-- average along the outflow boundary.
	580	DO k = nzb+1, nzt+1
	581	DO i = nxl, nxr
[73]	582
[106]	583	denom = u_m_n(k,ny,i) - u_m_n(k,ny-1,i)
	584
[1353]	585	IF ( denom /= 0.0_wp ) THEN
[996]	586	c_u(k,i) = -c_max * ( u(k,ny,i) - u_m_n(k,ny,i) ) / ( denom * tsc(2) )
[1353]	587	IF ( c_u(k,i) < 0.0_wp ) THEN
	588	c_u(k,i) = 0.0_wp
[106]	589	ELSEIF ( c_u(k,i) > c_max ) THEN
	590	c_u(k,i) = c_max
	591	ENDIF
	592	ELSE
	593	c_u(k,i) = c_max
[73]	594	ENDIF
	595
[106]	596	denom = v_m_n(k,ny,i) - v_m_n(k,ny-1,i)
[73]	597
[1353]	598	IF ( denom /= 0.0_wp ) THEN
[996]	599	c_v(k,i) = -c_max * ( v(k,ny,i) - v_m_n(k,ny,i) ) / ( denom * tsc(2) )
[1353]	600	IF ( c_v(k,i) < 0.0_wp ) THEN
	601	c_v(k,i) = 0.0_wp
[106]	602	ELSEIF ( c_v(k,i) > c_max ) THEN
	603	c_v(k,i) = c_max
	604	ENDIF
	605	ELSE
	606	c_v(k,i) = c_max
[73]	607	ENDIF
	608
[106]	609	denom = w_m_n(k,ny,i) - w_m_n(k,ny-1,i)
[73]	610
[1353]	611	IF ( denom /= 0.0_wp ) THEN
[996]	612	c_w(k,i) = -c_max * ( w(k,ny,i) - w_m_n(k,ny,i) ) / ( denom * tsc(2) )
[1353]	613	IF ( c_w(k,i) < 0.0_wp ) THEN
	614	c_w(k,i) = 0.0_wp
[106]	615	ELSEIF ( c_w(k,i) > c_max ) THEN
	616	c_w(k,i) = c_max
	617	ENDIF
	618	ELSE
	619	c_w(k,i) = c_max
[73]	620	ENDIF
[106]	621
[978]	622	c_u_m_l(k) = c_u_m_l(k) + c_u(k,i)
	623	c_v_m_l(k) = c_v_m_l(k) + c_v(k,i)
	624	c_w_m_l(k) = c_w_m_l(k) + c_w(k,i)
[106]	625
[978]	626	ENDDO
	627	ENDDO
[73]	628
[978]	629	#if defined( __parallel )
	630	IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr )
	631	CALL MPI_ALLREDUCE( c_u_m_l(nzb+1), c_u_m(nzb+1), nzt-nzb, MPI_REAL, &
	632	MPI_SUM, comm1dx, ierr )
	633	IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr )
	634	CALL MPI_ALLREDUCE( c_v_m_l(nzb+1), c_v_m(nzb+1), nzt-nzb, MPI_REAL, &
	635	MPI_SUM, comm1dx, ierr )
	636	IF ( collective_wait ) CALL MPI_BARRIER( comm1dx, ierr )
	637	CALL MPI_ALLREDUCE( c_w_m_l(nzb+1), c_w_m(nzb+1), nzt-nzb, MPI_REAL, &
	638	MPI_SUM, comm1dx, ierr )
	639	#else
	640	c_u_m = c_u_m_l
	641	c_v_m = c_v_m_l
	642	c_w_m = c_w_m_l
	643	#endif
	644
	645	c_u_m = c_u_m / (nx+1)
	646	c_v_m = c_v_m / (nx+1)
	647	c_w_m = c_w_m / (nx+1)
	648
[73]	649	!
[978]	650	!-- Save old timelevels for the next timestep
	651	IF ( intermediate_timestep_count == 1 ) THEN
	652	u_m_n(:,:,:) = u(:,ny-1:ny,:)
	653	v_m_n(:,:,:) = v(:,ny-1:ny,:)
	654	w_m_n(:,:,:) = w(:,ny-1:ny,:)
	655	ENDIF
[73]	656
[978]	657	!
	658	!-- Calculate the new velocities
[996]	659	DO k = nzb+1, nzt+1
	660	DO i = nxlg, nxrg
[978]	661	u_p(k,ny+1,i) = u(k,ny+1,i) - dt_3d * tsc(2) * c_u_m(k) * &
	662	( u(k,ny+1,i) - u(k,ny,i) ) * ddy
[73]	663
[978]	664	v_p(k,ny+1,i) = v(k,ny+1,i) - dt_3d * tsc(2) * c_v_m(k) * &
	665	( v(k,ny+1,i) - v(k,ny,i) ) * ddy
[73]	666
[978]	667	w_p(k,ny+1,i) = w(k,ny+1,i) - dt_3d * tsc(2) * c_w_m(k) * &
	668	( w(k,ny+1,i) - w(k,ny,i) ) * ddy
	669	ENDDO
[1]	670	ENDDO
	671
	672	!
[978]	673	!-- Bottom boundary at the outflow
	674	IF ( ibc_uv_b == 0 ) THEN
[1353]	675	u_p(nzb,ny+1,:) = 0.0_wp
	676	v_p(nzb,ny+1,:) = 0.0_wp
[978]	677	ELSE
	678	u_p(nzb,ny+1,:) = u_p(nzb+1,ny+1,:)
	679	v_p(nzb,ny+1,:) = v_p(nzb+1,ny+1,:)
	680	ENDIF
[1353]	681	w_p(nzb,ny+1,:) = 0.0_wp
[73]	682
	683	!
[978]	684	!-- Top boundary at the outflow
	685	IF ( ibc_uv_t == 0 ) THEN
	686	u_p(nzt+1,ny+1,:) = u_init(nzt+1)
	687	v_p(nzt+1,ny+1,:) = v_init(nzt+1)
	688	ELSE
	689	u_p(nzt+1,ny+1,:) = u_p(nzt,nyn+1,:)
	690	v_p(nzt+1,ny+1,:) = v_p(nzt,nyn+1,:)
	691	ENDIF
[1353]	692	w_p(nzt:nzt+1,ny+1,:) = 0.0_wp
[978]	693
[1]	694	ENDIF
	695
[75]	696	ENDIF
	697
[106]	698	IF ( outflow_l ) THEN
[75]	699
[1159]	700	IF ( use_cmax ) THEN
[1717]	701	u_p(:,:,0) = u(:,:,1)
	702	v_p(:,:,-1) = v(:,:,0)
[1159]	703	w_p(:,:,-1) = w(:,:,0)
	704	ELSEIF ( .NOT. use_cmax ) THEN
[75]	705
[978]	706	c_max = dx / dt_3d
[75]	707
[1353]	708	c_u_m_l = 0.0_wp
	709	c_v_m_l = 0.0_wp
	710	c_w_m_l = 0.0_wp
[978]	711
[1353]	712	c_u_m = 0.0_wp
	713	c_v_m = 0.0_wp
	714	c_w_m = 0.0_wp
[978]	715
[1]	716	!
[996]	717	!-- Calculate the phase speeds for u, v, and w, first local and then
	718	!-- average along the outflow boundary.
	719	DO k = nzb+1, nzt+1
	720	DO j = nys, nyn
[75]	721
[106]	722	denom = u_m_l(k,j,1) - u_m_l(k,j,2)
	723
[1353]	724	IF ( denom /= 0.0_wp ) THEN
[996]	725	c_u(k,j) = -c_max * ( u(k,j,1) - u_m_l(k,j,1) ) / ( denom * tsc(2) )
[1353]	726	IF ( c_u(k,j) < 0.0_wp ) THEN
	727	c_u(k,j) = 0.0_wp
[107]	728	ELSEIF ( c_u(k,j) > c_max ) THEN
	729	c_u(k,j) = c_max
[106]	730	ENDIF
	731	ELSE
[107]	732	c_u(k,j) = c_max
[75]	733	ENDIF
	734
[106]	735	denom = v_m_l(k,j,0) - v_m_l(k,j,1)
[75]	736
[1353]	737	IF ( denom /= 0.0_wp ) THEN
[996]	738	c_v(k,j) = -c_max * ( v(k,j,0) - v_m_l(k,j,0) ) / ( denom * tsc(2) )
[1353]	739	IF ( c_v(k,j) < 0.0_wp ) THEN
	740	c_v(k,j) = 0.0_wp
[106]	741	ELSEIF ( c_v(k,j) > c_max ) THEN
	742	c_v(k,j) = c_max
	743	ENDIF
	744	ELSE
	745	c_v(k,j) = c_max
[75]	746	ENDIF
	747
[106]	748	denom = w_m_l(k,j,0) - w_m_l(k,j,1)
[75]	749
[1353]	750	IF ( denom /= 0.0_wp ) THEN
[996]	751	c_w(k,j) = -c_max * ( w(k,j,0) - w_m_l(k,j,0) ) / ( denom * tsc(2) )
[1353]	752	IF ( c_w(k,j) < 0.0_wp ) THEN
	753	c_w(k,j) = 0.0_wp
[106]	754	ELSEIF ( c_w(k,j) > c_max ) THEN
	755	c_w(k,j) = c_max
	756	ENDIF
	757	ELSE
	758	c_w(k,j) = c_max
[75]	759	ENDIF
[106]	760
[978]	761	c_u_m_l(k) = c_u_m_l(k) + c_u(k,j)
	762	c_v_m_l(k) = c_v_m_l(k) + c_v(k,j)
	763	c_w_m_l(k) = c_w_m_l(k) + c_w(k,j)
[106]	764
[978]	765	ENDDO
	766	ENDDO
[75]	767
[978]	768	#if defined( __parallel )
	769	IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr )
	770	CALL MPI_ALLREDUCE( c_u_m_l(nzb+1), c_u_m(nzb+1), nzt-nzb, MPI_REAL, &
	771	MPI_SUM, comm1dy, ierr )
	772	IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr )
	773	CALL MPI_ALLREDUCE( c_v_m_l(nzb+1), c_v_m(nzb+1), nzt-nzb, MPI_REAL, &
	774	MPI_SUM, comm1dy, ierr )
	775	IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr )
	776	CALL MPI_ALLREDUCE( c_w_m_l(nzb+1), c_w_m(nzb+1), nzt-nzb, MPI_REAL, &
	777	MPI_SUM, comm1dy, ierr )
	778	#else
	779	c_u_m = c_u_m_l
	780	c_v_m = c_v_m_l
	781	c_w_m = c_w_m_l
	782	#endif
	783
	784	c_u_m = c_u_m / (ny+1)
	785	c_v_m = c_v_m / (ny+1)
	786	c_w_m = c_w_m / (ny+1)
	787
[73]	788	!
[978]	789	!-- Save old timelevels for the next timestep
	790	IF ( intermediate_timestep_count == 1 ) THEN
	791	u_m_l(:,:,:) = u(:,:,1:2)
	792	v_m_l(:,:,:) = v(:,:,0:1)
	793	w_m_l(:,:,:) = w(:,:,0:1)
	794	ENDIF
	795
	796	!
	797	!-- Calculate the new velocities
[996]	798	DO k = nzb+1, nzt+1
[1113]	799	DO j = nysg, nyng
[978]	800	u_p(k,j,0) = u(k,j,0) - dt_3d * tsc(2) * c_u_m(k) * &
[106]	801	( u(k,j,0) - u(k,j,1) ) * ddx
[75]	802
[978]	803	v_p(k,j,-1) = v(k,j,-1) - dt_3d * tsc(2) * c_v_m(k) * &
[75]	804	( v(k,j,-1) - v(k,j,0) ) * ddx
	805
[978]	806	w_p(k,j,-1) = w(k,j,-1) - dt_3d * tsc(2) * c_w_m(k) * &
[75]	807	( w(k,j,-1) - w(k,j,0) ) * ddx
[978]	808	ENDDO
[75]	809	ENDDO
	810
	811	!
[978]	812	!-- Bottom boundary at the outflow
	813	IF ( ibc_uv_b == 0 ) THEN
[1353]	814	u_p(nzb,:,0) = 0.0_wp
	815	v_p(nzb,:,-1) = 0.0_wp
[978]	816	ELSE
	817	u_p(nzb,:,0) = u_p(nzb+1,:,0)
	818	v_p(nzb,:,-1) = v_p(nzb+1,:,-1)
	819	ENDIF
[1353]	820	w_p(nzb,:,-1) = 0.0_wp
[1]	821
[75]	822	!
[978]	823	!-- Top boundary at the outflow
	824	IF ( ibc_uv_t == 0 ) THEN
[1764]	825	u_p(nzt+1,:,0) = u_init(nzt+1)
[978]	826	v_p(nzt+1,:,-1) = v_init(nzt+1)
	827	ELSE
[1764]	828	u_p(nzt+1,:,0) = u_p(nzt,:,0)
[978]	829	v_p(nzt+1,:,-1) = v_p(nzt,:,-1)
	830	ENDIF
[1353]	831	w_p(nzt:nzt+1,:,-1) = 0.0_wp
[978]	832
[75]	833	ENDIF
[73]	834
[75]	835	ENDIF
[73]	836
[106]	837	IF ( outflow_r ) THEN
[73]	838
[1159]	839	IF ( use_cmax ) THEN
	840	u_p(:,:,nx+1) = u(:,:,nx)
	841	v_p(:,:,nx+1) = v(:,:,nx)
	842	w_p(:,:,nx+1) = w(:,:,nx)
	843	ELSEIF ( .NOT. use_cmax ) THEN
[75]	844
[978]	845	c_max = dx / dt_3d
[75]	846
[1353]	847	c_u_m_l = 0.0_wp
	848	c_v_m_l = 0.0_wp
	849	c_w_m_l = 0.0_wp
[978]	850
[1353]	851	c_u_m = 0.0_wp
	852	c_v_m = 0.0_wp
	853	c_w_m = 0.0_wp
[978]	854
[1]	855	!
[996]	856	!-- Calculate the phase speeds for u, v, and w, first local and then
	857	!-- average along the outflow boundary.
	858	DO k = nzb+1, nzt+1
	859	DO j = nys, nyn
[73]	860
[106]	861	denom = u_m_r(k,j,nx) - u_m_r(k,j,nx-1)
	862
[1353]	863	IF ( denom /= 0.0_wp ) THEN
[996]	864	c_u(k,j) = -c_max * ( u(k,j,nx) - u_m_r(k,j,nx) ) / ( denom * tsc(2) )
[1353]	865	IF ( c_u(k,j) < 0.0_wp ) THEN
	866	c_u(k,j) = 0.0_wp
[106]	867	ELSEIF ( c_u(k,j) > c_max ) THEN
	868	c_u(k,j) = c_max
	869	ENDIF
	870	ELSE
	871	c_u(k,j) = c_max
[73]	872	ENDIF
	873
[106]	874	denom = v_m_r(k,j,nx) - v_m_r(k,j,nx-1)
[73]	875
[1353]	876	IF ( denom /= 0.0_wp ) THEN
[996]	877	c_v(k,j) = -c_max * ( v(k,j,nx) - v_m_r(k,j,nx) ) / ( denom * tsc(2) )
[1353]	878	IF ( c_v(k,j) < 0.0_wp ) THEN
	879	c_v(k,j) = 0.0_wp
[106]	880	ELSEIF ( c_v(k,j) > c_max ) THEN
	881	c_v(k,j) = c_max
	882	ENDIF
	883	ELSE
	884	c_v(k,j) = c_max
[73]	885	ENDIF
	886
[106]	887	denom = w_m_r(k,j,nx) - w_m_r(k,j,nx-1)
[73]	888
[1353]	889	IF ( denom /= 0.0_wp ) THEN
[996]	890	c_w(k,j) = -c_max * ( w(k,j,nx) - w_m_r(k,j,nx) ) / ( denom * tsc(2) )
[1353]	891	IF ( c_w(k,j) < 0.0_wp ) THEN
	892	c_w(k,j) = 0.0_wp
[106]	893	ELSEIF ( c_w(k,j) > c_max ) THEN
	894	c_w(k,j) = c_max
	895	ENDIF
	896	ELSE
	897	c_w(k,j) = c_max
[73]	898	ENDIF
[106]	899
[978]	900	c_u_m_l(k) = c_u_m_l(k) + c_u(k,j)
	901	c_v_m_l(k) = c_v_m_l(k) + c_v(k,j)
	902	c_w_m_l(k) = c_w_m_l(k) + c_w(k,j)
[106]	903
[978]	904	ENDDO
	905	ENDDO
[73]	906
[978]	907	#if defined( __parallel )
	908	IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr )
	909	CALL MPI_ALLREDUCE( c_u_m_l(nzb+1), c_u_m(nzb+1), nzt-nzb, MPI_REAL, &
	910	MPI_SUM, comm1dy, ierr )
	911	IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr )
	912	CALL MPI_ALLREDUCE( c_v_m_l(nzb+1), c_v_m(nzb+1), nzt-nzb, MPI_REAL, &
	913	MPI_SUM, comm1dy, ierr )
	914	IF ( collective_wait ) CALL MPI_BARRIER( comm1dy, ierr )
	915	CALL MPI_ALLREDUCE( c_w_m_l(nzb+1), c_w_m(nzb+1), nzt-nzb, MPI_REAL, &
	916	MPI_SUM, comm1dy, ierr )
	917	#else
	918	c_u_m = c_u_m_l
	919	c_v_m = c_v_m_l
	920	c_w_m = c_w_m_l
	921	#endif
	922
	923	c_u_m = c_u_m / (ny+1)
	924	c_v_m = c_v_m / (ny+1)
	925	c_w_m = c_w_m / (ny+1)
	926
[73]	927	!
[978]	928	!-- Save old timelevels for the next timestep
	929	IF ( intermediate_timestep_count == 1 ) THEN
	930	u_m_r(:,:,:) = u(:,:,nx-1:nx)
	931	v_m_r(:,:,:) = v(:,:,nx-1:nx)
	932	w_m_r(:,:,:) = w(:,:,nx-1:nx)
	933	ENDIF
[73]	934
[978]	935	!
	936	!-- Calculate the new velocities
[996]	937	DO k = nzb+1, nzt+1
[1113]	938	DO j = nysg, nyng
[978]	939	u_p(k,j,nx+1) = u(k,j,nx+1) - dt_3d * tsc(2) * c_u_m(k) * &
	940	( u(k,j,nx+1) - u(k,j,nx) ) * ddx
[73]	941
[978]	942	v_p(k,j,nx+1) = v(k,j,nx+1) - dt_3d * tsc(2) * c_v_m(k) * &
	943	( v(k,j,nx+1) - v(k,j,nx) ) * ddx
[73]	944
[978]	945	w_p(k,j,nx+1) = w(k,j,nx+1) - dt_3d * tsc(2) * c_w_m(k) * &
	946	( w(k,j,nx+1) - w(k,j,nx) ) * ddx
	947	ENDDO
[73]	948	ENDDO
	949
	950	!
[978]	951	!-- Bottom boundary at the outflow
	952	IF ( ibc_uv_b == 0 ) THEN
[1353]	953	u_p(nzb,:,nx+1) = 0.0_wp
	954	v_p(nzb,:,nx+1) = 0.0_wp
[978]	955	ELSE
	956	u_p(nzb,:,nx+1) = u_p(nzb+1,:,nx+1)
	957	v_p(nzb,:,nx+1) = v_p(nzb+1,:,nx+1)
	958	ENDIF
[1353]	959	w_p(nzb,:,nx+1) = 0.0_wp
[73]	960
	961	!
[978]	962	!-- Top boundary at the outflow
	963	IF ( ibc_uv_t == 0 ) THEN
	964	u_p(nzt+1,:,nx+1) = u_init(nzt+1)
	965	v_p(nzt+1,:,nx+1) = v_init(nzt+1)
	966	ELSE
	967	u_p(nzt+1,:,nx+1) = u_p(nzt,:,nx+1)
	968	v_p(nzt+1,:,nx+1) = v_p(nzt,:,nx+1)
	969	ENDIF
[1742]	970	w_p(nzt:nzt+1,:,nx+1) = 0.0_wp
[978]	971
[1]	972	ENDIF
	973
	974	ENDIF
	975
	976	END SUBROUTINE boundary_conds

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