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source: palm/trunk/SOURCE/prandtl_fluxes.f90 @ 1684

Last change on this file since 1684 was 1683, checked in by knoop, 10 years ago
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[1682]	1	!> @file prandtl_fluxes.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:
[1]	20	! -----------------
[1552]	21	!
[1683]	22	!
[1552]	23	! Former revisions:
	24	! -----------------
	25	! $Id: prandtl_fluxes.f90 1683 2015-10-07 23:57:51Z knoop $
	26	!
[1683]	27	! 1682 2015-10-07 23:56:08Z knoop
	28	! Code annotations made doxygen readable
	29	!
[1552]	30	! 1551 2015-03-03 14:18:16Z maronga
[1551]	31	! Removed land surface model part. The surface fluxes are now always calculated
	32	! within prandtl_fluxes, based on the given surface temperature/humidity (which
	33	! is either provided by the land surface model, by large scale forcing data, or
	34	! directly prescribed by the user.
[1341]	35	!
[1497]	36	! 1496 2014-12-02 17:25:50Z maronga
	37	! Adapted for land surface model
	38	!
[1495]	39	! 1494 2014-11-21 17:14:03Z maronga
	40	! Bugfixes: qs is now calculated before calculation of Rif. Ccalculation of
	41	! buoyancy flux in Rif corrected (added missing humidity term), allow use of
	42	! topography for coupled runs (not tested)
	43	!
[1362]	44	! 1361 2014-04-16 15:17:48Z hoffmann
	45	! Bugfix: calculation of turbulent fluxes of rain water content (qrsws) and rain
	46	! drop concentration (nrsws) added
	47	!
[1341]	48	! 1340 2014-03-25 19:45:13Z kanani
	49	! REAL constants defined as wp-kind
	50	!
[1321]	51	! 1320 2014-03-20 08:40:49Z raasch
[1320]	52	! ONLY-attribute added to USE-statements,
	53	! kind-parameters added to all INTEGER and REAL declaration statements,
	54	! kinds are defined in new module kinds,
	55	! old module precision_kind is removed,
	56	! revision history before 2012 removed,
	57	! comment fields (!:) to be used for variable explanations added to
	58	! all variable declaration statements
[1]	59	!
[1277]	60	! 1276 2014-01-15 13:40:41Z heinze
	61	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
	62	!
[1258]	63	! 1257 2013-11-08 15:18:40Z raasch
	64	! openACC "kernels do" replaced by "kernels loop", "loop independent" added
	65	!
[1037]	66	! 1036 2012-10-22 13:43:42Z raasch
	67	! code put under GPL (PALM 3.9)
	68	!
[1017]	69	! 1015 2012-09-27 09:23:24Z raasch
	70	! OpenACC statements added
	71	!
[979]	72	! 978 2012-08-09 08:28:32Z fricke
	73	! roughness length for scalar quantities z0h added
	74	!
[1]	75	! Revision 1.1 1998/01/23 10:06:06 raasch
	76	! Initial revision
	77	!
	78	!
	79	! Description:
	80	! ------------
[1682]	81	!> Diagnostic computation of vertical fluxes in the Prandtl layer from the
	82	!> values of the variables at grid point k=1
[1]	83	!------------------------------------------------------------------------------!
[1682]	84	SUBROUTINE prandtl_fluxes
	85
[1]	86
[1320]	87	USE arrays_3d, &
[1361]	88	ONLY: e, nr, nrs, nrsws, pt, q, qr, qrs, qrsws, qs, qsws, rif, shf, &
	89	ts, u, us, usws, v, vpt, vsws, zu, zw, z0, z0h
[1]	90
[1320]	91	USE control_parameters, &
[1361]	92	ONLY: cloud_physics, constant_heatflux, constant_waterflux, &
	93	coupling_mode, g, humidity, ibc_e_b, icloud_scheme, kappa, &
	94	large_scale_forcing, lsf_surf, passive_scalar, precipitation, &
	95	pt_surface, q_surface, rif_max, rif_min, run_coupled, &
	96	surface_pressure
[1320]	97
	98	USE indices, &
	99	ONLY: nxl, nxlg, nxr, nxrg, nys, nysg, nyn, nyng, nzb_s_inner, &
	100	nzb_u_inner, nzb_v_inner
	101
	102	USE kinds
	103
[1]	104	IMPLICIT NONE
	105
[1682]	106	INTEGER(iwp) :: i !<
	107	INTEGER(iwp) :: j !<
	108	INTEGER(iwp) :: k !<
[1]	109
[1682]	110	LOGICAL :: coupled_run !<
[1320]	111
[1682]	112	REAL(wp) :: a !<
	113	REAL(wp) :: b !<
	114	REAL(wp) :: e_q !<
	115	REAL(wp) :: rifm !<
	116	REAL(wp) :: uv_total !<
	117	REAL(wp) :: z_p !<
[1320]	118
[1015]	119	!
	120	!-- Data information for accelerators
[1361]	121	!$acc data present( e, nrsws, nzb_u_inner, nzb_v_inner, nzb_s_inner, pt ) &
	122	!$acc present( q, qs, qsws, qrsws, rif, shf, ts, u, us, usws, v ) &
	123	!$acc present( vpt, vsws, zu, zw, z0, z0h )
[667]	124	!
[1]	125	!-- Compute theta*
	126	IF ( constant_heatflux ) THEN
[1496]	127
[1]	128	!
	129	!-- For a given heat flux in the Prandtl layer:
	130	!-- for u* use the value from the previous time step
	131	!$OMP PARALLEL DO
[1257]	132	!$acc kernels loop
[667]	133	DO i = nxlg, nxrg
	134	DO j = nysg, nyng
[1340]	135	ts(j,i) = -shf(j,i) / ( us(j,i) + 1E-30_wp )
[1]	136	!
	137	!-- ts must be limited, because otherwise overflow may occur in case of
	138	!-- us=0 when computing rif further below
[1340]	139	IF ( ts(j,i) < -1.05E5_wp ) ts(j,i) = -1.0E5_wp
	140	IF ( ts(j,i) > 1.0E5_wp ) ts(j,i) = 1.0E5_wp
[1]	141	ENDDO
	142	ENDDO
	143
	144	ELSE
	145	!
	146	!-- For a given surface temperature:
[1496]	147	!-- (the Richardson number is still the one from the previous time step)
[1276]	148	IF ( large_scale_forcing .AND. lsf_surf ) THEN
[1496]	149	!$OMP PARALLEL DO
	150	!$acc kernels loop
	151	DO i = nxlg, nxrg
	152	DO j = nysg, nyng
	153	k = nzb_s_inner(j,i)
	154	pt(k,j,i) = pt_surface
	155	ENDDO
	156	ENDDO
[1276]	157	ENDIF
	158
[1]	159	!$OMP PARALLEL DO PRIVATE( a, b, k, z_p )
[1257]	160	!$acc kernels loop
[667]	161	DO i = nxlg, nxrg
	162	DO j = nysg, nyng
[1]	163
	164	k = nzb_s_inner(j,i)
	165	z_p = zu(k+1) - zw(k)
	166
[1340]	167	IF ( rif(j,i) >= 0.0_wp ) THEN
[1]	168	!
	169	!-- Stable stratification
[978]	170	ts(j,i) = kappa * ( pt(k+1,j,i) - pt(k,j,i) ) / ( &
	171	LOG( z_p / z0h(j,i) ) + &
[1340]	172	5.0_wp * rif(j,i) * ( z_p - z0h(j,i) ) / z_p &
[1]	173	)
	174	ELSE
	175	!
	176	!-- Unstable stratification
[1340]	177	a = SQRT( 1.0_wp - 16.0_wp * rif(j,i) )
	178	b = SQRT( 1.0_wp - 16.0_wp * rif(j,i) * z0h(j,i) / z_p )
[187]	179
[1494]	180	ts(j,i) = kappa * ( pt(k+1,j,i) - pt(k,j,i) ) / ( &
	181	LOG( z_p / z0h(j,i) ) - &
[1340]	182	2.0_wp * LOG( ( 1.0_wp + a ) / ( 1.0_wp + b ) ) )
[1]	183	ENDIF
	184
	185	ENDDO
	186	ENDDO
	187	ENDIF
	188
	189	!
[1494]	190	!-- If required compute q*
	191	IF ( humidity .OR. passive_scalar ) THEN
	192	IF ( constant_waterflux ) THEN
	193	!
	194	!-- For a given water flux in the Prandtl layer:
	195	!$OMP PARALLEL DO
	196	!$acc kernels loop
	197	DO i = nxlg, nxrg
	198	DO j = nysg, nyng
	199	qs(j,i) = -qsws(j,i) / ( us(j,i) + 1E-30_wp )
	200	ENDDO
	201	ENDDO
	202
	203	ELSE
	204	coupled_run = ( coupling_mode == 'atmosphere_to_ocean' .AND. run_coupled )
	205
	206	IF ( large_scale_forcing .AND. lsf_surf ) THEN
[1496]	207	!$OMP PARALLEL DO
	208	!$acc kernels loop
	209	DO i = nxlg, nxrg
	210	DO j = nysg, nyng
	211	k = nzb_s_inner(j,i)
	212	q(k,j,i) = q_surface
	213	ENDDO
	214	ENDDO
[1494]	215	ENDIF
	216
	217	!$OMP PARALLEL DO PRIVATE( a, b, k, z_p )
	218	!$acc kernels loop independent
	219	DO i = nxlg, nxrg
	220	!$acc loop independent
	221	DO j = nysg, nyng
	222
	223	k = nzb_s_inner(j,i)
	224	z_p = zu(k+1) - zw(k)
	225
	226	!
	227	!-- Assume saturation for atmosphere coupled to ocean (but not
	228	!-- in case of precursor runs)
	229	IF ( coupled_run ) THEN
	230	e_q = 6.1_wp * &
	231	EXP( 0.07_wp * ( MIN(pt(k,j,i),pt(k+1,j,i)) - 273.15_wp ) )
	232	q(k,j,i) = 0.622_wp * e_q / ( surface_pressure - e_q )
	233	ENDIF
	234	IF ( rif(j,i) >= 0.0_wp ) THEN
	235	!
	236	!-- Stable stratification
	237	qs(j,i) = kappa * ( q(k+1,j,i) - q(k,j,i) ) / ( &
	238	LOG( z_p / z0h(j,i) ) + &
	239	5.0_wp * rif(j,i) * ( z_p - z0h(j,i) ) / z_p &
	240	)
	241	ELSE
	242	!
	243	!-- Unstable stratification
	244	a = SQRT( 1.0_wp - 16.0_wp * rif(j,i) )
	245	b = SQRT( 1.0_wp - 16.0_wp * rif(j,i) * z0h(j,i) / z_p )
	246
	247	qs(j,i) = kappa * ( q(k+1,j,i) - q(k,j,i) ) / ( &
	248	LOG( z_p / z0h(j,i) ) - &
	249	2.0_wp * LOG( (1.0_wp + a ) / ( 1.0_wp + b ) ) )
	250	ENDIF
	251
	252	ENDDO
	253	ENDDO
	254	ENDIF
	255	ENDIF
	256
	257	!
[1]	258	!-- Compute z_p/L (corresponds to the Richardson-flux number)
[75]	259	IF ( .NOT. humidity ) THEN
[1]	260	!$OMP PARALLEL DO PRIVATE( k, z_p )
[1257]	261	!$acc kernels loop
[667]	262	DO i = nxlg, nxrg
	263	DO j = nysg, nyng
[1]	264	k = nzb_s_inner(j,i)
	265	z_p = zu(k+1) - zw(k)
	266	rif(j,i) = z_p * kappa * g * ts(j,i) / &
[1340]	267	( pt(k+1,j,i) * ( us(j,i)**2 + 1E-30_wp ) )
[1]	268	!
	269	!-- Limit the value range of the Richardson numbers.
	270	!-- This is necessary for very small velocities (u,v --> 0), because
	271	!-- the absolute value of rif can then become very large, which in
	272	!-- consequence would result in very large shear stresses and very
	273	!-- small momentum fluxes (both are generally unrealistic).
	274	IF ( rif(j,i) < rif_min ) rif(j,i) = rif_min
	275	IF ( rif(j,i) > rif_max ) rif(j,i) = rif_max
	276	ENDDO
	277	ENDDO
	278	ELSE
	279	!$OMP PARALLEL DO PRIVATE( k, z_p )
[1257]	280	!$acc kernels loop
[667]	281	DO i = nxlg, nxrg
	282	DO j = nysg, nyng
[1]	283	k = nzb_s_inner(j,i)
	284	z_p = zu(k+1) - zw(k)
[1494]	285	rif(j,i) = z_p * kappa * g * &
	286	( ts(j,i) + 0.61_wp * pt(k+1,j,i) * qs(j,i) + 0.61_wp &
	287	* q(k+1,j,i) * ts(j,i)) / &
[1340]	288	( vpt(k+1,j,i) * ( us(j,i)**2 + 1E-30_wp ) )
[1]	289	!
	290	!-- Limit the value range of the Richardson numbers.
	291	!-- This is necessary for very small velocities (u,v --> 0), because
	292	!-- the absolute value of rif can then become very large, which in
	293	!-- consequence would result in very large shear stresses and very
	294	!-- small momentum fluxes (both are generally unrealistic).
	295	IF ( rif(j,i) < rif_min ) rif(j,i) = rif_min
	296	IF ( rif(j,i) > rif_max ) rif(j,i) = rif_max
	297	ENDDO
	298	ENDDO
	299	ENDIF
	300
	301	!
	302	!-- Compute u* at the scalars' grid points
	303	!$OMP PARALLEL DO PRIVATE( a, b, k, uv_total, z_p )
[1257]	304	!$acc kernels loop
[1]	305	DO i = nxl, nxr
	306	DO j = nys, nyn
	307
	308	k = nzb_s_inner(j,i)
	309	z_p = zu(k+1) - zw(k)
	310
	311	!
[667]	312	!-- Compute the absolute value of the horizontal velocity
	313	!-- (relative to the surface)
[1494]	314	uv_total = SQRT( ( 0.5_wp * ( u(k+1,j,i) + u(k+1,j,i+1) &
	315	- u(k,j,i) - u(k,j,i+1) ) )**2 + &
	316	( 0.5_wp * ( v(k+1,j,i) + v(k+1,j+1,i) &
[1340]	317	- v(k,j,i) - v(k,j+1,i) ) )**2 )
[1]	318
[667]	319
[1340]	320	IF ( rif(j,i) >= 0.0_wp ) THEN
[1]	321	!
	322	!-- Stable stratification
[1494]	323	us(j,i) = kappa * uv_total / ( &
	324	LOG( z_p / z0(j,i) ) + &
	325	5.0_wp * rif(j,i) * ( z_p - z0(j,i) ) / z_p &
[1]	326	)
	327	ELSE
	328	!
	329	!-- Unstable stratification
[1340]	330	a = SQRT( SQRT( 1.0_wp - 16.0_wp * rif(j,i) ) )
	331	b = SQRT( SQRT( 1.0_wp - 16.0_wp * rif(j,i) / z_p * z0(j,i) ) )
[187]	332
[1494]	333	us(j,i) = kappa * uv_total / ( &
	334	LOG( z_p / z0(j,i) ) - &
	335	LOG( ( 1.0_wp + a )*2 ( 1.0_wp + a**2 ) / ( &
	336	( 1.0_wp + b )*2 ( 1.0_wp + b**2 ) ) ) + &
	337	2.0_wp * ( ATAN( a ) - ATAN( b ) ) &
[187]	338	)
[1]	339	ENDIF
	340	ENDDO
	341	ENDDO
	342
	343	!
[187]	344	!-- Values of us at ghost point locations are needed for the evaluation of usws
	345	!-- and vsws.
[1015]	346	!$acc update host( us )
[187]	347	CALL exchange_horiz_2d( us )
[1015]	348	!$acc update device( us )
	349
[187]	350	!
[1]	351	!-- Compute u'w' for the total model domain.
	352	!-- First compute the corresponding component of u* and square it.
	353	!$OMP PARALLEL DO PRIVATE( a, b, k, rifm, z_p )
[1257]	354	!$acc kernels loop
[1]	355	DO i = nxl, nxr
	356	DO j = nys, nyn
	357
	358	k = nzb_u_inner(j,i)
	359	z_p = zu(k+1) - zw(k)
	360
	361	!
	362	!-- Compute Richardson-flux number for this point
[1340]	363	rifm = 0.5_wp * ( rif(j,i-1) + rif(j,i) )
	364	IF ( rifm >= 0.0_wp ) THEN
[1]	365	!
	366	!-- Stable stratification
[1494]	367	usws(j,i) = kappa * ( u(k+1,j,i) - u(k,j,i) )/ ( &
	368	LOG( z_p / z0(j,i) ) + &
	369	5.0_wp * rifm * ( z_p - z0(j,i) ) / z_p &
[1340]	370	)
[1]	371	ELSE
	372	!
	373	!-- Unstable stratification
[1340]	374	a = SQRT( SQRT( 1.0_wp - 16.0_wp * rifm ) )
	375	b = SQRT( SQRT( 1.0_wp - 16.0_wp * rifm / z_p * z0(j,i) ) )
[187]	376
[1494]	377	usws(j,i) = kappa * ( u(k+1,j,i) - u(k,j,i) ) / ( &
	378	LOG( z_p / z0(j,i) ) - &
	379	LOG( (1.0_wp + a )*2 ( 1.0_wp + a**2 ) / ( &
	380	(1.0_wp + b )*2 ( 1.0_wp + b**2 ) ) ) + &
	381	2.0_wp * ( ATAN( a ) - ATAN( b ) ) &
[1]	382	)
	383	ENDIF
[1340]	384	usws(j,i) = -usws(j,i) * 0.5_wp * ( us(j,i-1) + us(j,i) )
[1]	385	ENDDO
	386	ENDDO
	387
	388	!
	389	!-- Compute v'w' for the total model domain.
	390	!-- First compute the corresponding component of u* and square it.
	391	!$OMP PARALLEL DO PRIVATE( a, b, k, rifm, z_p )
[1257]	392	!$acc kernels loop
[1]	393	DO i = nxl, nxr
	394	DO j = nys, nyn
	395
	396	k = nzb_v_inner(j,i)
	397	z_p = zu(k+1) - zw(k)
	398
	399	!
	400	!-- Compute Richardson-flux number for this point
[1340]	401	rifm = 0.5_wp * ( rif(j-1,i) + rif(j,i) )
	402	IF ( rifm >= 0.0_wp ) THEN
[1]	403	!
	404	!-- Stable stratification
[1494]	405	vsws(j,i) = kappa * ( v(k+1,j,i) - v(k,j,i) ) / ( &
	406	LOG( z_p / z0(j,i) ) + &
	407	5.0_wp * rifm * ( z_p - z0(j,i) ) / z_p &
[1340]	408	)
[1]	409	ELSE
	410	!
	411	!-- Unstable stratification
[1340]	412	a = SQRT( SQRT( 1.0_wp - 16.0_wp * rifm ) )
	413	b = SQRT( SQRT( 1.0_wp - 16.0_wp * rifm / z_p * z0(j,i) ) )
[187]	414
[1494]	415	vsws(j,i) = kappa * ( v(k+1,j,i) - v(k,j,i) ) / ( &
	416	LOG( z_p / z0(j,i) ) - &
	417	LOG( (1.0_wp + a )*2 ( 1.0_wp + a**2 ) / ( &
	418	(1.0_wp + b )*2 ( 1.0_wp + b**2 ) ) ) + &
	419	2.0_wp * ( ATAN( a ) - ATAN( b ) ) &
[1]	420	)
	421	ENDIF
[1340]	422	vsws(j,i) = -vsws(j,i) * 0.5_wp * ( us(j-1,i) + us(j,i) )
[1]	423	ENDDO
	424	ENDDO
	425
	426	!
[1494]	427	!-- If required compute qr* and nr*
	428	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. precipitation ) THEN
[1276]	429
[1494]	430	!$OMP PARALLEL DO PRIVATE( a, b, k, z_p )
	431	!$acc kernels loop independent
	432	DO i = nxlg, nxrg
	433	!$acc loop independent
	434	DO j = nysg, nyng
[1276]	435
[1494]	436	k = nzb_s_inner(j,i)
	437	z_p = zu(k+1) - zw(k)
[1]	438
[1494]	439	IF ( rif(j,i) >= 0.0 ) THEN
[108]	440	!
[1494]	441	!-- Stable stratification
	442	qrs(j,i) = kappa * ( qr(k+1,j,i) - qr(k,j,i) ) / ( &
	443	LOG( z_p / z0h(j,i) ) + &
	444	5.0 * rif(j,i) * ( z_p - z0h(j,i) ) / z_p )
	445	nrs(j,i) = kappa * ( nr(k+1,j,i) - nr(k,j,i) ) / ( &
	446	LOG( z_p / z0h(j,i) ) + &
	447	5.0 * rif(j,i) * ( z_p - z0h(j,i) ) / z_p )
[1]	448
[1494]	449	ELSE
[1361]	450	!
[1494]	451	!-- Unstable stratification
	452	a = SQRT( 1.0 - 16.0 * rif(j,i) )
	453	b = SQRT( 1.0 - 16.0 * rif(j,i) * z0h(j,i) / z_p )
[1361]	454
[1494]	455	qrs(j,i) = kappa * ( qr(k+1,j,i) - qr(k,j,i) ) / ( &
	456	LOG( z_p / z0h(j,i) ) - &
	457	2.0 * LOG( (1.0 + a ) / ( 1.0 + b ) ) )
	458	nrs(j,i) = kappa * ( nr(k+1,j,i) - nr(k,j,i) ) / ( &
	459	LOG( z_p / z0h(j,i) ) - &
	460	2.0 * LOG( (1.0 + a ) / ( 1.0 + b ) ) )
[1361]	461
[1494]	462	ENDIF
[1361]	463
	464	ENDDO
[1494]	465	ENDDO
[1361]	466
[1]	467	ENDIF
	468
	469	!
[187]	470	!-- Exchange the boundaries for the momentum fluxes (only for sake of
	471	!-- completeness)
[1015]	472	!$acc update host( usws, vsws )
[1]	473	CALL exchange_horiz_2d( usws )
	474	CALL exchange_horiz_2d( vsws )
[1015]	475	!$acc update device( usws, vsws )
	476	IF ( humidity .OR. passive_scalar ) THEN
	477	!$acc update host( qsws )
	478	CALL exchange_horiz_2d( qsws )
	479	!$acc update device( qsws )
[1361]	480	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. &
	481	precipitation ) THEN
	482	!$acc update host( qrsws, nrsws )
	483	CALL exchange_horiz_2d( qrsws )
	484	CALL exchange_horiz_2d( nrsws )
	485	!$acc update device( qrsws, nrsws )
	486	ENDIF
[1015]	487	ENDIF
[1]	488
	489	!
	490	!-- Compute the vertical kinematic heat flux
[1551]	491	IF ( .NOT. constant_heatflux ) THEN
[1]	492	!$OMP PARALLEL DO
[1257]	493	!$acc kernels loop independent
[667]	494	DO i = nxlg, nxrg
[1257]	495	!$acc loop independent
[667]	496	DO j = nysg, nyng
[1]	497	shf(j,i) = -ts(j,i) * us(j,i)
	498	ENDDO
	499	ENDDO
	500	ENDIF
	501
	502	!
	503	!-- Compute the vertical water/scalar flux
[1551]	504	IF ( .NOT. constant_waterflux .AND. ( humidity .OR. passive_scalar ) ) THEN
[1]	505	!$OMP PARALLEL DO
[1257]	506	!$acc kernels loop independent
[667]	507	DO i = nxlg, nxrg
[1257]	508	!$acc loop independent
[667]	509	DO j = nysg, nyng
[1]	510	qsws(j,i) = -qs(j,i) * us(j,i)
	511	ENDDO
	512	ENDDO
	513	ENDIF
	514
	515	!
[1361]	516	!-- Compute (turbulent) fluxes of rain water content and rain drop concentartion
	517	IF ( cloud_physics .AND. icloud_scheme == 0 .AND. precipitation ) THEN
	518	!$OMP PARALLEL DO
	519	!$acc kernels loop independent
	520	DO i = nxlg, nxrg
	521	!$acc loop independent
	522	DO j = nysg, nyng
	523	qrsws(j,i) = -qrs(j,i) * us(j,i)
	524	nrsws(j,i) = -nrs(j,i) * us(j,i)
	525	ENDDO
	526	ENDDO
	527	ENDIF
	528
	529	!
[1]	530	!-- Bottom boundary condition for the TKE
	531	IF ( ibc_e_b == 2 ) THEN
	532	!$OMP PARALLEL DO
[1257]	533	!$acc kernels loop independent
[667]	534	DO i = nxlg, nxrg
[1257]	535	!$acc loop independent
[667]	536	DO j = nysg, nyng
[1340]	537	e(nzb_s_inner(j,i)+1,j,i) = ( us(j,i) / 0.1_wp )**2
[1]	538	!
	539	!-- As a test: cm = 0.4
[1340]	540	! e(nzb_s_inner(j,i)+1,j,i) = ( us(j,i) / 0.4_wp )**2
[1]	541	e(nzb_s_inner(j,i),j,i) = e(nzb_s_inner(j,i)+1,j,i)
	542	ENDDO
	543	ENDDO
	544	ENDIF
	545
[1015]	546	!$acc end data
[1]	547
	548	END SUBROUTINE prandtl_fluxes

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