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source: palm/trunk/SOURCE/prandtl_fluxes.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: 19.6 KB

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

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