Home

Context Navigation

source: palm/trunk/SOURCE/surface_layer_fluxes_mod.f90 @ 1998

Last change on this file since 1998 was 1993, checked in by suehring, 8 years ago
last commit documented
Property svn:keywords set to `Id`
File size: 44.4 KB

Rev	Line
[1850]	1	!> @file surface_layer_fluxes_mod.f90
[1691]	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
[1691]	17	!
	18	!--------------------------------------------------------------------------------!
	19	! Current revisions:
[1747]	20	! ------------------
[1758]	21	!
[1993]	22	!
[1692]	23	! Former revisions:
	24	! -----------------
	25	! $Id: surface_layer_fluxes_mod.f90 1993 2016-08-12 15:16:41Z knoop $
	26	!
[1993]	27	! 1992 2016-08-12 15:14:59Z suehring
	28	! Minor bug, declaration of look-up index as INTEGER
	29	!
[1961]	30	! 1960 2016-07-12 16:34:24Z suehring
	31	! Treat humidity and passive scalar separately
	32	!
[1930]	33	! 1929 2016-06-09 16:25:25Z suehring
	34	! Bugfix: avoid segmentation fault in case one grid point is horizontally
	35	! completely surrounded by topography
	36	!
[1921]	37	! 1920 2016-05-30 10:50:15Z suehring
	38	! Avoid segmentation fault (see change in 1915) by different initialization of
	39	! us instead of adding a very small number in the denominator
	40	!
[1916]	41	! 1915 2016-05-27 11:05:02Z suehring
	42	! Bugfix: avoid segmentation fault in case of most_method = 'circular' at first
	43	! timestep
	44	!
[1851]	45	! 1850 2016-04-08 13:29:27Z maronga
	46	! Module renamed
	47	!
	48	!
[1823]	49	! 1822 2016-04-07 07:49:42Z hoffmann
	50	! icloud_scheme replaced by microphysics_*
	51	!
[1789]	52	! 1788 2016-03-10 11:01:04Z maronga
	53	! Added parameter z0q which replaces z0h in the similarity functions for
	54	! humidity.
	55	! Syntax layout improved.
	56	!
[1758]	57	! 1757 2016-02-22 15:49:32Z maronga
	58	! Minor fixes.
	59	!
[1750]	60	! 1749 2016-02-09 12:19:56Z raasch
	61	! further OpenACC adjustments
	62	!
[1748]	63	! 1747 2016-02-08 12:25:53Z raasch
	64	! adjustments for OpenACC usage
	65	!
[1710]	66	! 1709 2015-11-04 14:47:01Z maronga
	67	! Bugfix: division by zero could occur when calculating rib at low wind speeds
	68	! Bugfix: calculation of uv_total for neutral = .T., initial value for ol for
	69	! neutral = .T.
	70	!
[1706]	71	! 1705 2015-11-02 14:28:56Z maronga
	72	! Typo removed
	73	!
[1698]	74	! 1697 2015-10-28 17:14:10Z raasch
	75	! FORTRAN and OpenMP errors removed
	76	!
[1697]	77	! 1696 2015-10-27 10:03:34Z maronga
[1691]	78	! Modularized and completely re-written version of prandtl_fluxes.f90. In the
	79	! course of the re-writing two additional methods have been implemented. See
	80	! updated description.
	81	!
	82	! 1551 2015-03-03 14:18:16Z maronga
	83	! Removed land surface model part. The surface fluxes are now always calculated
	84	! within prandtl_fluxes, based on the given surface temperature/humidity (which
	85	! is either provided by the land surface model, by large scale forcing data, or
	86	! directly prescribed by the user.
	87	!
	88	! 1496 2014-12-02 17:25:50Z maronga
	89	! Adapted for land surface model
	90	!
	91	! 1494 2014-11-21 17:14:03Z maronga
	92	! Bugfixes: qs is now calculated before calculation of Rif. calculation of
	93	! buoyancy flux in Rif corrected (added missing humidity term), allow use of
	94	! topography for coupled runs (not tested)
	95	!
	96	! 1361 2014-04-16 15:17:48Z hoffmann
	97	! Bugfix: calculation of turbulent fluxes of rain water content (qrsws) and rain
	98	! drop concentration (nrsws) added
	99	!
	100	! 1340 2014-03-25 19:45:13Z kanani
	101	! REAL constants defined as wp-kind
	102	!
	103	! 1320 2014-03-20 08:40:49Z raasch
	104	! ONLY-attribute added to USE-statements,
	105	! kind-parameters added to all INTEGER and REAL declaration statements,
	106	! kinds are defined in new module kinds,
	107	! old module precision_kind is removed,
	108	! revision history before 2012 removed,
	109	! comment fields (!:) to be used for variable explanations added to
	110	! all variable declaration statements
	111	!
	112	! 1276 2014-01-15 13:40:41Z heinze
	113	! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars
	114	!
	115	! 1257 2013-11-08 15:18:40Z raasch
	116	! openACC "kernels do" replaced by "kernels loop", "loop independent" added
	117	!
	118	! 1036 2012-10-22 13:43:42Z raasch
	119	! code put under GPL (PALM 3.9)
	120	!
	121	! 1015 2012-09-27 09:23:24Z raasch
	122	! OpenACC statements added
	123	!
	124	! 978 2012-08-09 08:28:32Z fricke
	125	! roughness length for scalar quantities z0h added
	126	!
	127	! Revision 1.1 1998/01/23 10:06:06 raasch
	128	! Initial revision
	129	!
	130	!
	131	! Description:
	132	! ------------
	133	!> Diagnostic computation of vertical fluxes in the constant flux layer from the
	134	!> values of the variables at grid point k=1. Three different methods are
	135	!> available:
	136	!> 1) the "old" version (most_method = 'circular') which is fast, but inaccurate
	137	!> 2) a Newton iteration method (most_method = 'newton'), which is accurate, but
	138	!> slower
	139	!> 3) a method using a lookup table which is fast and accurate. Note, however,
	140	!> that this method cannot be used in case of roughness heterogeneity
	141	!>
	142	!> @todo (re)move large_scale_forcing actions
	143	!> @todo check/optimize OpenMP and OpenACC directives
	144	!------------------------------------------------------------------------------!
	145	MODULE surface_layer_fluxes_mod
	146
	147	USE arrays_3d, &
	148	ONLY: e, kh, nr, nrs, nrsws, ol, pt, q, ql, qr, qrs, qrsws, qs, qsws, &
[1960]	149	s, shf, ss, ssws, ts, u, us, usws, v, vpt, vsws, zu, zw, z0, &
	150	z0h, z0q
[1691]	151
	152	USE cloud_parameters, &
	153	ONLY: l_d_cp, pt_d_t
	154
	155	USE constants, &
	156	ONLY: pi
	157
	158	USE cpulog
	159
	160	USE control_parameters, &
[1960]	161	ONLY: cloud_physics, constant_heatflux, constant_scalarflux, &
	162	constant_waterflux, coupling_mode, g, humidity, ibc_e_b, &
	163	ibc_pt_b, initializing_actions, kappa, &
	164	intermediate_timestep_count, &
[1691]	165	intermediate_timestep_count_max, large_scale_forcing, lsf_surf, &
[1822]	166	message_string, microphysics_seifert, most_method, neutral, &
	167	passive_scalar, pt_surface, q_surface, run_coupled, &
[1691]	168	surface_pressure, simulated_time, terminate_run, zeta_max, &
	169	zeta_min
	170
	171	USE indices, &
	172	ONLY: nxl, nxlg, nxr, nxrg, nys, nysg, nyn, nyng, nzb_s_inner, &
	173	nzb_u_inner, nzb_v_inner
	174
	175	USE kinds
	176
	177	USE pegrid
	178
	179	USE land_surface_model_mod, &
	180	ONLY: land_surface, skip_time_do_lsm
	181
	182	IMPLICIT NONE
	183
[1992]	184	INTEGER(iwp) :: i !< loop index x direction
	185	INTEGER(iwp) :: j !< loop index y direction
	186	INTEGER(iwp) :: k !< loop index z direction
	187	INTEGER(iwp) :: l_bnd = 7500 !< Lookup table index of the last time step
[1691]	188
	189	INTEGER(iwp), PARAMETER :: num_steps = 15000 !< number of steps in the lookup table
	190
	191	LOGICAL :: coupled_run !< Flag for coupled atmosphere-ocean runs
	192
	193	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: pt1, & !< Potential temperature at first grid level (required for cloud_physics = .T.)
	194	qv1, & !< Specific humidity at first grid level (required for cloud_physics = .T.)
	195	uv_total !< Total velocity at first grid level
	196
	197	REAL(wp), DIMENSION(0:num_steps-1) :: rib_tab, & !< Lookup table bulk Richardson number
	198	ol_tab !< Lookup table values of L
	199
	200	REAL(wp) :: e_s, & !< Saturation water vapor pressure
	201	ol_max = 1.0E6_wp, & !< Maximum Obukhov length
	202	rib_max, & !< Maximum Richardson number in lookup table
	203	rib_min, & !< Minimum Richardson number in lookup table
	204	z_mo !< Height of the constant flux layer where MOST is assumed
	205
	206
	207	SAVE
	208
	209	PRIVATE
	210
[1747]	211	PUBLIC init_surface_layer_fluxes, pt1, qv1, surface_layer_fluxes, uv_total
[1691]	212
	213	INTERFACE init_surface_layer_fluxes
	214	MODULE PROCEDURE init_surface_layer_fluxes
	215	END INTERFACE init_surface_layer_fluxes
	216
	217	INTERFACE surface_layer_fluxes
	218	MODULE PROCEDURE surface_layer_fluxes
	219	END INTERFACE surface_layer_fluxes
	220
	221
	222	CONTAINS
	223
	224
	225	!------------------------------------------------------------------------------!
	226	! Description:
	227	! ------------
	228	!> Main routine to compute the surface fluxes
	229	!------------------------------------------------------------------------------!
	230	SUBROUTINE surface_layer_fluxes
	231
	232	IMPLICIT NONE
	233
	234	!
	235	!-- In case cloud physics is used, it is required to derive potential
	236	!-- temperature and specific humidity at first grid level from the fields pt
	237	!-- and q
	238	IF ( cloud_physics ) THEN
	239	CALL calc_pt_q
	240	ENDIF
	241
	242	!
	243	!-- First, calculate the new Obukhov length, then new friction velocity,
	244	!-- followed by the new scaling parameters (th, q, etc.), and the new
	245	!-- surface fluxes if required. The old routine ("circular") requires a
	246	!-- different order of calls as the scaling parameters from the previous time
	247	!-- steps are used to calculate the Obukhov length
	248
	249	!
	250	!-- Depending on setting of most_method use the "old" routine
	251	IF ( most_method == 'circular' ) THEN
	252
	253	CALL calc_scaling_parameters
	254
[1709]	255	CALL calc_uv_total
	256
[1691]	257	IF ( .NOT. neutral ) THEN
	258	CALL calc_ol
	259	ENDIF
	260
	261	CALL calc_us
	262
	263	CALL calc_surface_fluxes
	264
	265	!
	266	!-- Use either Newton iteration or a lookup table for the bulk Richardson
	267	!-- number to calculate the Obukhov length
[1788]	268	ELSEIF ( most_method == 'newton' .OR. most_method == 'lookup' ) THEN
[1691]	269
[1709]	270	CALL calc_uv_total
	271
[1691]	272	IF ( .NOT. neutral ) THEN
	273	CALL calc_ol
	274	ENDIF
	275
	276	CALL calc_us
	277
	278	CALL calc_scaling_parameters
	279
	280	CALL calc_surface_fluxes
	281
	282	ENDIF
	283
	284	END SUBROUTINE surface_layer_fluxes
	285
	286
	287	!------------------------------------------------------------------------------!
	288	! Description:
	289	! ------------
	290	!> Initializing actions for the surface layer routine. Basically, this involves
	291	!> the preparation of a lookup table for the the bulk Richardson number vs
	292	!> Obukhov length L when using the lookup table method.
	293	!------------------------------------------------------------------------------!
	294	SUBROUTINE init_surface_layer_fluxes
	295
	296	IMPLICIT NONE
	297
	298	INTEGER(iwp) :: l, & !< Index for loop to create lookup table
	299	num_steps_n !< Number of non-stretched zeta steps
	300
	301	LOGICAL :: terminate_run_l = .FALSE. !< Flag to terminate run (global)
	302
	303	REAL(wp), PARAMETER :: zeta_stretch = -10.0_wp !< Start of stretching in the free convection limit
	304
	305	REAL(wp), DIMENSION(:), ALLOCATABLE :: zeta_tmp
	306
	307
	308	REAL(wp) :: zeta_step, & !< Increment of zeta
	309	regr = 1.01_wp, & !< Stretching factor of zeta_step in the free convection limit
	310	regr_old = 1.0E9_wp, & !< Stretching factor of last iteration step
	311	z0h_min = 0.0_wp, & !< Minimum value of z0h to create table
	312	z0_min = 0.0_wp !< Minimum value of z0 to create table
	313	!
	314	!-- When cloud physics is used, arrays for storing potential temperature and
	315	!-- specific humidity at first grid level are required
	316	IF ( cloud_physics ) THEN
	317	ALLOCATE ( pt1(nysg:nyng,nxlg:nxrg) )
	318	ALLOCATE ( qv1(nysg:nyng,nxlg:nxrg) )
	319	ENDIF
	320
	321	!
	322	!-- Allocate field for storing the horizontal velocity
	323	ALLOCATE ( uv_total(nysg:nyng,nxlg:nxrg) )
	324
[1709]	325
	326	!
	327	!-- In case of runs with neutral statification, set Obukhov length to a
	328	!-- large value
	329	IF ( neutral ) ol = 1.0E10_wp
	330
[1691]	331	IF ( most_method == 'lookup' ) THEN
	332
	333	!
	334	!-- Check for roughness heterogeneity. In that case terminate run and
	335	!-- inform user
[1788]	336	IF ( MINVAL( z0h ) /= MAXVAL( z0h ) .OR. &
[1691]	337	MINVAL( z0 ) /= MAXVAL( z0 ) ) THEN
	338	terminate_run_l = .TRUE.
	339	ENDIF
	340
	341	#if defined( __parallel )
	342	!
	343	!-- Make a logical OR for all processes. Force termiation of model if result
	344	!-- is TRUE
	345	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
	346	CALL MPI_ALLREDUCE( terminate_run_l, terminate_run, 1, MPI_LOGICAL, &
	347	MPI_LOR, comm2d, ierr )
	348	#else
	349	terminate_run = terminate_run_l
	350	#endif
	351
	352	IF ( terminate_run ) THEN
	353	message_string = 'most_method = "lookup" cannot be used in ' // &
	354	'combination with a prescribed roughness ' // &
	355	'heterogeneity'
	356	CALL message( 'surface_layer_fluxes', 'PA0417', 1, 2, 0, 6, 0 )
	357	ENDIF
	358
	359	ALLOCATE( zeta_tmp(0:num_steps-1) )
	360
	361	!
	362	!-- Use the lowest possible value for z_mo
	363	k = MINVAL(nzb_s_inner)
	364	z_mo = zu(k+1) - zw(k)
	365
	366	!
	367	!-- Calculate z/L range from zeta_stretch to zeta_max using 90% of the
	368	!-- available steps (num_steps). The calculation is done with negative
	369	!-- values of zeta in order to simplify the stretching in the free
	370	!-- convection limit for the remaining 10% of steps.
	371	zeta_tmp(0) = - zeta_max
	372	num_steps_n = ( num_steps * 9 / 10 ) - 1
	373	zeta_step = (zeta_max - zeta_stretch) / REAL(num_steps_n)
	374
	375	DO l = 1, num_steps_n
	376	zeta_tmp(l) = zeta_tmp(l-1) + zeta_step
	377	ENDDO
	378
	379	!
	380	!-- Calculate stretching factor for the free convection range
[1788]	381	DO WHILE ( ABS( (regr-regr_old) / regr_old ) > 1.0E-10_wp )
[1691]	382	regr_old = regr
	383	regr = ( 1.0_wp - ( -zeta_min / zeta_step ) * ( 1.0_wp - regr ) &
	384	)**( 10.0_wp / REAL(num_steps) )
	385	ENDDO
	386
	387	!
	388	!-- Calculate z/L range from zeta_min to zeta_stretch
	389	DO l = num_steps_n+1, num_steps-1
	390	zeta_tmp(l) = zeta_tmp(l-1) + zeta_step
	391	zeta_step = zeta_step * regr
	392	ENDDO
	393
	394	!
[1757]	395	!-- Save roughness lengths to temporary variables
	396	z0h_min = z0h(nys,nxl)
	397	z0_min = z0(nys,nxl)
[1691]	398
	399	!
	400	!-- Calculate lookup table for the Richardson number versus Obukhov length
	401	!-- The Richardson number (rib) is defined depending on the choice of
	402	!-- boundary conditions for temperature
	403	IF ( ibc_pt_b == 1 ) THEN
	404	DO l = 0, num_steps-1
	405	ol_tab(l) = - z_mo / zeta_tmp(num_steps-1-l)
	406	rib_tab(l) = z_mo / ol_tab(l) / ( LOG( z_mo / z0_min ) &
	407	- psi_m( z_mo / ol_tab(l) ) &
	408	+ psi_m( z0_min / ol_tab(l) ) &
	409	)**3
	410	ENDDO
	411	ELSE
	412	DO l = 0, num_steps-1
	413	ol_tab(l) = - z_mo / zeta_tmp(num_steps-1-l)
	414	rib_tab(l) = z_mo / ol_tab(l) * ( LOG( z_mo / z0h_min ) &
	415	- psi_h( z_mo / ol_tab(l) ) &
	416	+ psi_h( z0h_min / ol_tab(l) ) &
	417	) &
	418	/ ( LOG( z_mo / z0_min ) &
	419	- psi_m( z_mo / ol_tab(l) ) &
	420	+ psi_m( z0_min / ol_tab(l) ) &
	421	)**2
	422	ENDDO
	423	ENDIF
	424
	425	!
	426	!-- Determine minimum values of rib in the lookup table. Set upper limit
	427	!-- to critical Richardson number (0.25)
	428	rib_min = MINVAL(rib_tab)
	429	rib_max = 0.25 !MAXVAL(rib_tab)
	430
	431	DEALLOCATE( zeta_tmp )
	432	ENDIF
	433
	434	END SUBROUTINE init_surface_layer_fluxes
	435
	436
	437	!------------------------------------------------------------------------------!
	438	! Description:
	439	! ------------
[1709]	440	!> Compute the absolute value of the horizontal velocity (relative to the
	441	!> surface). This is required by all methods
[1691]	442	!------------------------------------------------------------------------------!
[1709]	443	SUBROUTINE calc_uv_total
[1691]	444
	445	IMPLICIT NONE
	446
	447
[1747]	448	!$OMP PARALLEL DO PRIVATE( k )
	449	!$acc kernels loop present( nzb_s_inner, u, uv_total, v ) private( j, k )
[1691]	450	DO i = nxl, nxr
	451	DO j = nys, nyn
	452
	453	k = nzb_s_inner(j,i)
	454	uv_total(j,i) = SQRT( ( 0.5_wp * ( u(k+1,j,i) + u(k+1,j,i+1) &
	455	- u(k,j,i) - u(k,j,i+1) ) )**2 + &
	456	( 0.5_wp * ( v(k+1,j,i) + v(k+1,j+1,i) &
	457	- v(k,j,i) - v(k,j+1,i) ) )**2 )
	458
	459	!
	460	!-- For too small values of the local wind, MOST does not work. A
	461	!-- threshold value is thus set if required
	462	! uv_total(j,i) = MAX(0.01_wp,uv_total(j,i))
	463
	464	ENDDO
	465	ENDDO
	466
	467	!
	468	!-- Values of uv_total need to be exchanged at the ghost boundaries
	469	!$acc update host( uv_total )
	470	CALL exchange_horiz_2d( uv_total )
	471	!$acc update device( uv_total )
	472
[1709]	473	END SUBROUTINE calc_uv_total
	474
	475
	476	!------------------------------------------------------------------------------!
	477	! Description:
	478	! ------------
	479	!> Calculate the Obukhov length (L) and Richardson flux number (z/L)
	480	!------------------------------------------------------------------------------!
	481	SUBROUTINE calc_ol
	482
	483	IMPLICIT NONE
	484
	485	INTEGER(iwp) :: iter, & !< Newton iteration step
	486	l !< look index
	487
	488	REAL(wp), DIMENSION(nysg:nyng,nxlg:nxrg) :: rib !< Bulk Richardson number
	489
	490	REAL(wp) :: f, & !< Function for Newton iteration: f = Ri - [...]/[...]^2 = 0
	491	f_d_ol, & !< Derivative of f
	492	ol_l, & !< Lower bound of L for Newton iteration
	493	ol_m, & !< Previous value of L for Newton iteration
	494	ol_old, & !< Previous time step value of L
	495	ol_u !< Upper bound of L for Newton iteration
	496
[1691]	497	IF ( TRIM( most_method ) /= 'circular' ) THEN
	498
[1747]	499	!$acc data present( nzb_s_inner, pt, q, qsws, rib, shf, uv_total, vpt, zu, zw )
	500
[1691]	501	!$OMP PARALLEL DO PRIVATE( k, z_mo )
[1747]	502	!$acc kernels loop private( j, k, z_mo )
[1691]	503	DO i = nxl, nxr
	504	DO j = nys, nyn
	505
	506	k = nzb_s_inner(j,i)
	507	z_mo = zu(k+1) - zw(k)
	508
	509	!
	510	!-- Evaluate bulk Richardson number (calculation depends on
	511	!-- definition based on setting of boundary conditions
	512	IF ( ibc_pt_b /= 1 ) THEN
	513	IF ( humidity ) THEN
	514	rib(j,i) = g * z_mo * ( vpt(k+1,j,i) - vpt(k,j,i) ) &
[1709]	515	/ ( uv_total(j,i)*2 vpt(k+1,j,i) + 1.0E-20_wp )
[1691]	516	ELSE
	517	rib(j,i) = g * z_mo * ( pt(k+1,j,i) - pt(k,j,i) ) &
[1709]	518	/ ( uv_total(j,i)*2 pt(k+1,j,i) + 1.0E-20_wp )
[1691]	519	ENDIF
	520	ELSE
	521	!
	522	!-- When using Neumann boundary conditions, the buoyancy flux
	523	!-- is required but cannot be calculated at the surface, as pt
	524	!-- and q are not known at the surface. Hence the values at
	525	!-- first grid level are used to estimate the buoyancy flux
	526	IF ( humidity ) THEN
	527	rib(j,i) = - g * z_mo * ( ( 1.0_wp + 0.61_wp &
	528	* q(k+1,j,i) ) * shf(j,i) + 0.61_wp &
	529	* pt(k+1,j,i) * qsws(j,i) ) &
[1709]	530	/ ( uv_total(j,i)*3 vpt(k+1,j,i) * kappa**2&
	531	+ 1.0E-20_wp)
[1691]	532	ELSE
	533	rib(j,i) = - g * z_mo * shf(j,i) &
[1709]	534	/ ( uv_total(j,i)*3 pt(k+1,j,i) * kappa**2 &
	535	+ 1.0E-20_wp )
[1691]	536	ENDIF
	537	ENDIF
	538
	539	ENDDO
	540	ENDDO
[1747]	541	!$acc end data
[1691]	542
	543	ENDIF
	544
	545	!
	546	!-- Calculate the Obukhov length either using a Newton iteration
	547	!-- method, via a lookup table, or using the old circular way
	548	IF ( TRIM( most_method ) == 'newton' ) THEN
	549
	550	!$OMP PARALLEL DO PRIVATE( k, z_mo )
[1749]	551	!# WARNING: does not work on GPU so far because of DO-loop with
	552	!# undetermined iterations
[1747]	553	!!!!!!$acc kernels loop
[1691]	554	DO i = nxl, nxr
	555	DO j = nys, nyn
	556
	557	k = nzb_s_inner(j,i)
	558	z_mo = zu(k+1) - zw(k)
	559
	560	!
	561	!-- Store current value in case the Newton iteration fails
	562	ol_old = ol(j,i)
	563
	564	!
	565	!-- Ensure that the bulk Richardson number and the Obukhov
	566	!-- lengtH have the same sign
[1788]	567	IF ( rib(j,i) * ol(j,i) < 0.0_wp .OR. &
[1691]	568	ABS( ol(j,i) ) == ol_max ) THEN
	569	IF ( rib(j,i) > 0.0_wp ) ol(j,i) = 0.01_wp
	570	IF ( rib(j,i) < 0.0_wp ) ol(j,i) = -0.01_wp
	571	ENDIF
	572	!
	573	!-- Iteration to find Obukhov length
	574	iter = 0
	575	DO
	576	iter = iter + 1
	577	!
	578	!-- In case of divergence, use the value of the previous time step
	579	IF ( iter > 1000 ) THEN
	580	ol(j,i) = ol_old
	581	EXIT
	582	ENDIF
	583
	584	ol_m = ol(j,i)
	585	ol_l = ol_m - 0.001_wp * ol_m
	586	ol_u = ol_m + 0.001_wp * ol_m
	587
	588
	589	IF ( ibc_pt_b /= 1 ) THEN
	590	!
	591	!-- Calculate f = Ri - [...]/[...]^2 = 0
	592	f = rib(j,i) - ( z_mo / ol_m ) * ( LOG( z_mo / z0h(j,i) )&
	593	- psi_h( z_mo / ol_m ) &
	594	+ psi_h( z0h(j,i) / ol_m ) &
	595	) &
	596	/ ( LOG( z_mo / z0(j,i) ) &
	597	- psi_m( z_mo / ol_m ) &
	598	+ psi_m( z0(j,i) / ol_m ) &
	599	)**2
	600
	601	!
	602	!-- Calculate df/dL
	603	f_d_ol = ( - ( z_mo / ol_u ) * ( LOG( z_mo / z0h(j,i) ) &
	604	- psi_h( z_mo / ol_u ) &
	605	+ psi_h( z0h(j,i) / ol_u ) &
	606	) &
	607	/ ( LOG( z_mo / z0(j,i) ) &
	608	- psi_m( z_mo / ol_u ) &
	609	+ psi_m( z0(j,i) / ol_u ) &
	610	)**2 &
	611	+ ( z_mo / ol_l ) * ( LOG( z_mo / z0h(j,i) ) &
	612	- psi_h( z_mo / ol_l ) &
	613	+ psi_h( z0h(j,i) / ol_l ) &
	614	) &
	615	/ ( LOG( z_mo / z0(j,i) ) &
	616	- psi_m( z_mo / ol_l ) &
	617	+ psi_m( z0(j,i) / ol_l ) &
	618	)**2 &
	619	) / ( ol_u - ol_l )
	620	ELSE
	621	!
	622	!-- Calculate f = Ri - 1 /[...]^3 = 0
	623	f = rib(j,i) - ( z_mo / ol_m ) / ( LOG( z_mo / z0(j,i) )&
	624	- psi_m( z_mo / ol_m ) &
	625	+ psi_m( z0(j,i) / ol_m ) &
	626	)**3
	627
	628	!
	629	!-- Calculate df/dL
	630	f_d_ol = ( - ( z_mo / ol_u ) / ( LOG( z_mo / z0(j,i) ) &
	631	- psi_m( z_mo / ol_u ) &
	632	+ psi_m( z0(j,i) / ol_u ) &
	633	)**3 &
	634	+ ( z_mo / ol_l ) / ( LOG( z_mo / z0(j,i) ) &
	635	- psi_m( z_mo / ol_l ) &
	636	+ psi_m( z0(j,i) / ol_l ) &
	637	)**3 &
	638	) / ( ol_u - ol_l )
	639	ENDIF
	640	!
	641	!-- Calculate new L
	642	ol(j,i) = ol_m - f / f_d_ol
	643
	644	!
	645	!-- Ensure that the bulk Richardson number and the Obukhov
	646	!-- length have the same sign and ensure convergence.
	647	IF ( ol(j,i) * ol_m < 0.0_wp ) ol(j,i) = ol_m * 0.5_wp
	648
	649	!
	650	!-- If unrealistic value occurs, set L to the maximum
	651	!-- value that is allowed
	652	IF ( ABS( ol(j,i) ) > ol_max ) THEN
	653	ol(j,i) = ol_max
	654	EXIT
	655	ENDIF
	656	!
	657	!-- Check for convergence
	658	IF ( ABS( ( ol(j,i) - ol_m ) / ol(j,i) ) < 1.0E-4_wp ) THEN
	659	EXIT
	660	ELSE
	661	CYCLE
	662	ENDIF
	663
	664	ENDDO
	665
	666	ENDDO
	667	ENDDO
	668
	669	ELSEIF ( TRIM( most_method ) == 'lookup' ) THEN
	670
	671	!$OMP PARALLEL DO PRIVATE( k, z_mo )
[1788]	672	!# WARNING: does not work on GPU so far because of DO WHILE construct
[1747]	673	!!!!!!$acc kernels loop
[1691]	674	DO i = nxl, nxr
	675	DO j = nys, nyn
	676
	677	!
	678	!-- If the bulk Richardson number is outside the range of the lookup
	679	!-- table, set it to the exceeding threshold value
	680	IF ( rib(j,i) < rib_min ) rib(j,i) = rib_min
	681	IF ( rib(j,i) > rib_max ) rib(j,i) = rib_max
	682
	683	!
	684	!-- Find the correct index bounds for linear interpolation. As the
	685	!-- Richardson number will not differ very much from time step to
	686	!-- time step , use the index from the last step and search in the
	687	!-- correct direction
	688	l = l_bnd
	689	IF ( rib_tab(l) - rib(j,i) > 0.0_wp ) THEN
[1788]	690	DO WHILE ( rib_tab(l-1) - rib(j,i) > 0.0_wp .AND. l > 0 )
[1691]	691	l = l-1
	692	ENDDO
	693	ELSE
[1788]	694	DO WHILE ( rib_tab(l) - rib(j,i) < 0.0_wp &
	695	.AND. l < num_steps-1 )
[1691]	696	l = l+1
	697	ENDDO
	698	ENDIF
	699	l_bnd = l
	700
	701	!
	702	!-- Linear interpolation to find the correct value of z/L
[1788]	703	ol(j,i) = ( ol_tab(l-1) + ( ol_tab(l) - ol_tab(l-1) ) &
	704	/ ( rib_tab(l) - rib_tab(l-1) ) &
[1691]	705	* ( rib(j,i) - rib_tab(l-1) ) )
	706
	707	ENDDO
	708	ENDDO
	709
	710	ELSEIF ( TRIM( most_method ) == 'circular' ) THEN
	711
	712	!$OMP PARALLEL DO PRIVATE( k, z_mo )
[1747]	713	!$acc kernels loop present( nzb_s_inner, ol, pt, pt1, q, ql, qs, qv1, ts, us, vpt, zu, zw ) private( j, k, z_mo )
[1691]	714	DO i = nxl, nxr
	715	DO j = nys, nyn
	716
	717	k = nzb_s_inner(j,i)
	718	z_mo = zu(k+1) - zw(k)
	719
	720	IF ( .NOT. humidity ) THEN
	721	ol(j,i) = ( pt(k+1,j,i) * us(j,i)*2 ) / ( kappa g &
	722	* ts(j,i) + 1E-30_wp )
	723	ELSEIF ( cloud_physics ) THEN
	724
	725	ol(j,i) = ( vpt(k+1,j,i) * us(j,i)*2 ) / ( kappa g &
	726	* ( ts(j,i) + 0.61_wp * pt1(j,i) * qs(j,i) &
	727	+ 0.61_wp * qv1(j,i) * ts(j,i) - ts(j,i) &
	728	* ql(k+1,j,i) ) + 1E-30_wp )
	729	ELSE
	730	ol(j,i) = ( vpt(k+1,j,i) * us(j,i)*2 ) / ( kappa g &
	731	* ( ts(j,i) + 0.61_wp * pt(k+1,j,i) * qs(j,i) &
	732	+ 0.61_wp * q(k+1,j,i) * ts(j,i) ) + 1E-30_wp )
	733	ENDIF
	734	!
	735	!-- Limit the value range of the Obukhov length.
	736	!-- This is necessary for very small velocities (u,v --> 0), because
	737	!-- the absolute value of ol can then become very small, which in
	738	!-- consequence would result in very large shear stresses and very
	739	!-- small momentum fluxes (both are generally unrealistic).
[1929]	740	IF ( ( z_mo / ( ol(j,i) + 1E-30_wp ) ) < zeta_min ) &
	741	ol(j,i) = z_mo / zeta_min
	742	IF ( ( z_mo / ( ol(j,i) + 1E-30_wp ) ) > zeta_max ) &
	743	ol(j,i) = z_mo / zeta_max
[1691]	744	ENDDO
	745	ENDDO
	746
	747	ENDIF
	748
	749	!
	750	!-- Values of ol at ghost point locations are needed for the evaluation
	751	!-- of usws and vsws.
	752	!$acc update host( ol )
	753	CALL exchange_horiz_2d( ol )
	754	!$acc update device( ol )
	755
	756	END SUBROUTINE calc_ol
	757
	758	!
	759	!-- Calculate friction velocity u*
	760	SUBROUTINE calc_us
	761
	762	IMPLICIT NONE
	763
[1697]	764	!$OMP PARALLEL DO PRIVATE( k, z_mo )
[1749]	765	!$acc kernels loop present( nzb_s_inner, ol, us, uv_total, zu, zw, z0 ) private( j, k, z_mo )
[1691]	766	DO i = nxlg, nxrg
	767	DO j = nysg, nyng
	768
	769	k = nzb_s_inner(j,i)+1
	770	z_mo = zu(k+1) - zw(k)
	771
	772	!
	773	!-- Compute u* at the scalars' grid points
	774	us(j,i) = kappa * uv_total(j,i) / ( LOG( z_mo / z0(j,i) ) &
	775	- psi_m( z_mo / ol(j,i) ) &
	776	+ psi_m( z0(j,i) / ol(j,i) ) )
	777	ENDDO
	778	ENDDO
	779
	780	END SUBROUTINE calc_us
	781
	782	!
	783	!-- Calculate potential temperature and specific humidity at first grid level
	784	SUBROUTINE calc_pt_q
	785
	786	IMPLICIT NONE
	787
[1747]	788	!$acc kernels loop present( nzb_s_inner, pt, pt1, pt_d_t, q, ql, qv1 ) private( j, k )
[1691]	789	DO i = nxlg, nxrg
	790	DO j = nysg, nyng
	791	k = nzb_s_inner(j,i)+1
	792	pt1(j,i) = pt(k,j,i) + l_d_cp * pt_d_t(k) * ql(k,j,i)
	793	qv1(j,i) = q(k,j,i) - ql(k,j,i)
	794	ENDDO
	795	ENDDO
	796
	797	END SUBROUTINE calc_pt_q
	798
	799	!
	800	!-- Calculate the other MOST scaling parameters theta, q, (qr, nr)
	801	SUBROUTINE calc_scaling_parameters
	802
	803	IMPLICIT NONE
	804
	805	!
	806	!-- Data information for accelerators
	807	!$acc data present( e, nrsws, nzb_u_inner, nzb_v_inner, nzb_s_inner, pt ) &
	808	!$acc present( q, qs, qsws, qrsws, shf, ts, u, us, usws, v ) &
	809	!$acc present( vpt, vsws, zu, zw, z0, z0h )
	810	!
	811	!-- Compute theta*
	812	IF ( constant_heatflux ) THEN
	813
	814	!
	815	!-- For a given heat flux in the surface layer:
	816	!$OMP PARALLEL DO
[1747]	817	!$acc kernels loop private( j )
[1691]	818	DO i = nxlg, nxrg
	819	DO j = nysg, nyng
	820	ts(j,i) = -shf(j,i) / ( us(j,i) + 1E-30_wp )
	821	!
	822	!-- ts must be limited, because otherwise overflow may occur in case
	823	!-- of us=0 when computing ol further below
	824	IF ( ts(j,i) < -1.05E5_wp ) ts(j,i) = -1.0E5_wp
	825	IF ( ts(j,i) > 1.0E5_wp ) ts(j,i) = 1.0E5_wp
	826	ENDDO
	827	ENDDO
	828
	829	ELSE
	830	!
	831	!-- For a given surface temperature:
[1788]	832	IF ( large_scale_forcing .AND. lsf_surf ) THEN
[1691]	833	!$OMP PARALLEL DO
[1747]	834	!$acc kernels loop private( j, k )
[1691]	835	DO i = nxlg, nxrg
	836	DO j = nysg, nyng
	837	k = nzb_s_inner(j,i)
	838	pt(k,j,i) = pt_surface
	839	ENDDO
	840	ENDDO
	841	ENDIF
	842
[1697]	843	!$OMP PARALLEL DO PRIVATE( k, z_mo )
[1749]	844	!$acc kernels loop present( nzb_s_inner, ol, pt, pt1, ts, zu, zw, z0h ) private( j, k, z_mo )
[1691]	845	DO i = nxlg, nxrg
	846	DO j = nysg, nyng
	847
	848	k = nzb_s_inner(j,i)
	849	z_mo = zu(k+1) - zw(k)
	850
	851	IF ( cloud_physics ) THEN
	852	ts(j,i) = kappa * ( pt1(j,i) - pt(k,j,i) ) &
	853	/ ( LOG( z_mo / z0h(j,i) ) &
	854	- psi_h( z_mo / ol(j,i) ) &
	855	+ psi_h( z0h(j,i) / ol(j,i) ) )
	856	ELSE
	857	ts(j,i) = kappa * ( pt(k+1,j,i) - pt(k,j,i) ) &
	858	/ ( LOG( z_mo / z0h(j,i) ) &
	859	- psi_h( z_mo / ol(j,i) ) &
	860	+ psi_h( z0h(j,i) / ol(j,i) ) )
	861	ENDIF
	862
	863	ENDDO
	864	ENDDO
	865	ENDIF
	866
	867	!
	868	!-- If required compute q*
[1960]	869	IF ( humidity ) THEN
[1691]	870	IF ( constant_waterflux ) THEN
	871	!
[1788]	872	!-- For a given water flux in the surface layer
[1691]	873	!$OMP PARALLEL DO
[1747]	874	!$acc kernels loop private( j )
[1691]	875	DO i = nxlg, nxrg
	876	DO j = nysg, nyng
	877	qs(j,i) = -qsws(j,i) / ( us(j,i) + 1E-30_wp )
	878	ENDDO
	879	ENDDO
	880
	881	ELSE
[1788]	882	coupled_run = ( coupling_mode == 'atmosphere_to_ocean' .AND. &
[1691]	883	run_coupled )
	884
[1788]	885	IF ( large_scale_forcing .AND. lsf_surf ) THEN
[1691]	886	!$OMP PARALLEL DO
[1747]	887	!$acc kernels loop private( j, k )
[1691]	888	DO i = nxlg, nxrg
	889	DO j = nysg, nyng
	890	k = nzb_s_inner(j,i)
	891	q(k,j,i) = q_surface
	892	ENDDO
	893	ENDDO
	894	ENDIF
	895
[1697]	896	!$OMP PARALLEL DO PRIVATE( e_s, k, z_mo )
[1788]	897	!$acc kernels loop independent present( nzb_s_inner, ol, pt, q, qs, qv1, zu, zw, z0q ) private( e_s, j, k, z_mo )
[1691]	898	DO i = nxlg, nxrg
[1749]	899	!$acc loop independent
[1691]	900	DO j = nysg, nyng
	901
	902	k = nzb_s_inner(j,i)
	903	z_mo = zu(k+1) - zw(k)
	904
	905	!
	906	!-- Assume saturation for atmosphere coupled to ocean (but not
	907	!-- in case of precursor runs)
	908	IF ( coupled_run ) THEN
	909	e_s = 6.1_wp * &
	910	EXP( 0.07_wp * ( MIN(pt(k,j,i),pt(k+1,j,i)) &
	911	- 273.15_wp ) )
	912	q(k,j,i) = 0.622_wp * e_s / ( surface_pressure - e_s )
	913	ENDIF
	914
	915	IF ( cloud_physics ) THEN
	916	qs(j,i) = kappa * ( qv1(j,i) - q(k,j,i) ) &
[1788]	917	/ ( LOG( z_mo / z0q(j,i) ) &
[1691]	918	- psi_h( z_mo / ol(j,i) ) &
[1788]	919	+ psi_h( z0q(j,i) / ol(j,i) ) )
[1691]	920
	921	ELSE
	922	qs(j,i) = kappa * ( q(k+1,j,i) - q(k,j,i) ) &
[1788]	923	/ ( LOG( z_mo / z0q(j,i) ) &
[1691]	924	- psi_h( z_mo / ol(j,i) ) &
[1788]	925	+ psi_h( z0q(j,i) / ol(j,i) ) )
[1691]	926	ENDIF
	927
	928	ENDDO
	929	ENDDO
	930	ENDIF
	931	ENDIF
[1960]	932
	933	!
	934	!-- If required compute s*
	935	IF ( passive_scalar ) THEN
	936	IF ( constant_scalarflux ) THEN
	937	!
	938	!-- For a given water flux in the surface layer
	939	!$OMP PARALLEL DO
	940	!$acc kernels loop private( j )
	941	DO i = nxlg, nxrg
	942	DO j = nysg, nyng
	943	ss(j,i) = -ssws(j,i) / ( us(j,i) + 1E-30_wp )
	944	ENDDO
	945	ENDDO
	946	ENDIF
	947	ENDIF
[1691]	948
	949
	950	!
	951	!-- If required compute qr* and nr*
[1822]	952	IF ( cloud_physics .AND. microphysics_seifert ) &
[1788]	953	THEN
[1691]	954
[1697]	955	!$OMP PARALLEL DO PRIVATE( k, z_mo )
[1788]	956	!$acc kernels loop independent present( nr, nrs, nzb_s_inner, ol, qr, qrs, zu, zw, z0q ) private( j, k, z_mo )
[1691]	957	DO i = nxlg, nxrg
[1749]	958	!$acc loop independent
[1691]	959	DO j = nysg, nyng
	960
	961	k = nzb_s_inner(j,i)
	962	z_mo = zu(k+1) - zw(k)
	963
[1749]	964	qrs(j,i) = kappa * ( qr(k+1,j,i) - qr(k,j,i) ) &
[1788]	965	/ ( LOG( z_mo / z0q(j,i) ) &
[1749]	966	- psi_h( z_mo / ol(j,i) ) &
[1788]	967	+ psi_h( z0q(j,i) / ol(j,i) ) )
[1691]	968
[1749]	969	nrs(j,i) = kappa * ( nr(k+1,j,i) - nr(k,j,i) ) &
[1788]	970	/ ( LOG( z_mo / z0q(j,i) ) &
[1749]	971	- psi_h( z_mo / ol(j,i) ) &
[1788]	972	+ psi_h( z0q(j,i) / ol(j,i) ) )
[1691]	973	ENDDO
	974	ENDDO
	975
	976	ENDIF
[1747]	977	!$acc end data
[1691]	978
	979	END SUBROUTINE calc_scaling_parameters
	980
	981
	982
	983	!
	984	!-- Calculate surface fluxes usws, vsws, shf, qsws, (qrsws, nrsws)
	985	SUBROUTINE calc_surface_fluxes
	986
	987	IMPLICIT NONE
	988
	989	REAL(wp) :: ol_mid !< Grid-interpolated L
	990
	991	!
	992	!-- Compute u'w' for the total model domain.
	993	!-- First compute the corresponding component of u* and square it.
	994	!$OMP PARALLEL DO PRIVATE( k, ol_mid, z_mo )
[1749]	995	!$acc kernels loop present( nzb_u_inner, ol, u, us, usws, zu, zw, z0 ) private( j, k, z_mo )
[1691]	996	DO i = nxl, nxr
	997	DO j = nys, nyn
	998
	999	k = nzb_u_inner(j,i)
	1000	z_mo = zu(k+1) - zw(k)
	1001	!
	1002	!-- Compute bulk Obukhov length for this point
	1003	ol_mid = 0.5_wp * ( ol(j,i-1) + ol(j,i) )
	1004
	1005	IF ( ol_mid == 0.0_wp ) THEN
	1006	ol_mid = MIN(ol(j,i-1), ol(j,i))
	1007	ENDIF
	1008
	1009	usws(j,i) = kappa * ( u(k+1,j,i) - u(k,j,i) ) &
	1010	/ ( LOG( z_mo / z0(j,i) ) &
	1011	- psi_m( z_mo / ol_mid ) &
	1012	+ psi_m( z0(j,i) / ol_mid ) )
	1013
	1014	usws(j,i) = -usws(j,i) * 0.5_wp * ( us(j,i-1) + us(j,i) )
	1015	ENDDO
	1016	ENDDO
	1017
	1018	!
	1019	!-- Compute v'w' for the total model domain.
	1020	!-- First compute the corresponding component of u* and square it.
	1021	!$OMP PARALLEL DO PRIVATE( k, ol_mid, z_mo )
[1749]	1022	!$acc kernels loop present( nzb_v_inner, ol, v, us, vsws, zu, zw, z0 ) private( j, k, ol_mid, z_mo )
[1691]	1023	DO i = nxl, nxr
	1024	DO j = nys, nyn
	1025
	1026	k = nzb_v_inner(j,i)
	1027	z_mo = zu(k+1) - zw(k)
	1028	!
	1029	!-- Compute bulk Obukhov length for this point
	1030	ol_mid = 0.5_wp * ( ol(j-1,i) + ol(j,i) )
	1031
	1032	IF ( ol_mid == 0.0_wp ) THEN
	1033	ol_mid = MIN(ol(j-1,i), ol(j-1,i))
	1034	ENDIF
	1035
	1036	vsws(j,i) = kappa * ( v(k+1,j,i) - v(k,j,i) ) &
	1037	/ ( LOG( z_mo / z0(j,i) ) &
	1038	- psi_m( z_mo / ol_mid ) &
	1039	+ psi_m( z0(j,i) / ol_mid ) )
	1040
	1041	vsws(j,i) = -vsws(j,i) * 0.5_wp * ( us(j,i-1) + us(j,i) )
	1042
	1043	ENDDO
	1044	ENDDO
	1045
	1046	!
	1047	!-- Exchange the boundaries for the momentum fluxes (is this still required?)
[1749]	1048	!$acc update host( usws, vsws )
[1691]	1049	CALL exchange_horiz_2d( usws )
	1050	CALL exchange_horiz_2d( vsws )
	1051	!$acc update device( usws, vsws )
	1052
	1053	!
	1054	!-- Compute the vertical kinematic heat flux
[1788]	1055	IF ( .NOT. constant_heatflux .AND. ( simulated_time <= &
	1056	skip_time_do_lsm .OR. .NOT. land_surface ) ) THEN
[1691]	1057	!$OMP PARALLEL DO
[1747]	1058	!$acc kernels loop independent present( shf, ts, us )
[1691]	1059	DO i = nxlg, nxrg
	1060	!$acc loop independent
	1061	DO j = nysg, nyng
	1062	shf(j,i) = -ts(j,i) * us(j,i)
	1063	ENDDO
	1064	ENDDO
	1065
	1066	ENDIF
	1067
	1068	!
[1960]	1069	!-- Compute the vertical water flux
	1070	IF ( .NOT. constant_waterflux .AND. humidity .AND. &
	1071	( simulated_time <= skip_time_do_lsm &
[1788]	1072	.OR. .NOT. land_surface ) ) THEN
[1691]	1073	!$OMP PARALLEL DO
[1747]	1074	!$acc kernels loop independent present( qs, qsws, us )
[1691]	1075	DO i = nxlg, nxrg
	1076	!$acc loop independent
	1077	DO j = nysg, nyng
	1078	qsws(j,i) = -qs(j,i) * us(j,i)
	1079	ENDDO
	1080	ENDDO
	1081
	1082	ENDIF
[1960]	1083
	1084	!
	1085	!-- Compute the vertical scalar flux
	1086	IF ( .NOT. constant_scalarflux .AND. passive_scalar .AND. &
	1087	( simulated_time <= skip_time_do_lsm &
	1088	.OR. .NOT. land_surface ) ) THEN
	1089	!$OMP PARALLEL DO
	1090	!$acc kernels loop independent present( qs, qsws, us )
	1091	DO i = nxlg, nxrg
	1092	!$acc loop independent
	1093	DO j = nysg, nyng
	1094	ssws(j,i) = -ss(j,i) * us(j,i)
	1095	ENDDO
	1096	ENDDO
[1691]	1097
[1960]	1098	ENDIF
	1099
[1691]	1100	!
	1101	!-- Compute (turbulent) fluxes of rain water content and rain drop conc.
[1822]	1102	IF ( cloud_physics .AND. microphysics_seifert ) THEN
[1691]	1103	!$OMP PARALLEL DO
[1747]	1104	!$acc kernels loop independent present( nrs, nrsws, qrs, qrsws, us )
[1691]	1105	DO i = nxlg, nxrg
	1106	!$acc loop independent
	1107	DO j = nysg, nyng
	1108	qrsws(j,i) = -qrs(j,i) * us(j,i)
	1109	nrsws(j,i) = -nrs(j,i) * us(j,i)
	1110	ENDDO
	1111	ENDDO
	1112	ENDIF
	1113
	1114	!
	1115	!-- Bottom boundary condition for the TKE
	1116	IF ( ibc_e_b == 2 ) THEN
	1117	!$OMP PARALLEL DO
[1747]	1118	!$acc kernels loop independent present( e, nzb_s_inner, us )
[1691]	1119	DO i = nxlg, nxrg
	1120	!$acc loop independent
	1121	DO j = nysg, nyng
[1757]	1122	k = nzb_s_inner(j,i)
	1123	e(k+1,j,i) = ( us(j,i) / 0.1_wp )**2
[1691]	1124	!
	1125	!-- As a test: cm = 0.4
[1757]	1126	! e(k+1,j,i) = ( us(j,i) / 0.4_wp )**2
	1127	e(k,j,i) = e(k+1,j,i)
[1691]	1128	ENDDO
	1129	ENDDO
	1130	ENDIF
	1131
	1132	END SUBROUTINE calc_surface_fluxes
	1133
	1134
	1135	!
	1136	!-- Integrated stability function for momentum
	1137	FUNCTION psi_m( zeta )
	1138
	1139	USE kinds
	1140
	1141	IMPLICIT NONE
	1142
	1143	REAL(wp) :: psi_m !< Integrated similarity function result
	1144	REAL(wp) :: zeta !< Stability parameter z/L
	1145	REAL(wp) :: x !< dummy variable
	1146
	1147	REAL(wp), PARAMETER :: a = 1.0_wp !< constant
	1148	REAL(wp), PARAMETER :: b = 0.66666666666_wp !< constant
	1149	REAL(wp), PARAMETER :: c = 5.0_wp !< constant
	1150	REAL(wp), PARAMETER :: d = 0.35_wp !< constant
	1151	REAL(wp), PARAMETER :: c_d_d = c / d !< constant
	1152	REAL(wp), PARAMETER :: bc_d_d = b * c / d !< constant
	1153
	1154
	1155	IF ( zeta < 0.0_wp ) THEN
[1788]	1156	x = SQRT( SQRT( 1.0_wp - 16.0_wp * zeta ) )
[1691]	1157	psi_m = pi * 0.5_wp - 2.0_wp * ATAN( x ) + LOG( ( 1.0_wp + x )**2 &
	1158	* ( 1.0_wp + x*2 ) 0.125_wp )
	1159	ELSE
	1160
	1161	psi_m = - b * ( zeta - c_d_d ) * EXP( -d * zeta ) - a * zeta &
	1162	- bc_d_d
	1163	!
	1164	!-- Old version for stable conditions (only valid for z/L < 0.5)
	1165	!-- psi_m = - 5.0_wp * zeta
	1166
	1167	ENDIF
	1168
	1169	END FUNCTION psi_m
	1170
	1171
	1172	!
	1173	!-- Integrated stability function for heat and moisture
	1174	FUNCTION psi_h( zeta )
	1175
	1176	USE kinds
	1177
	1178	IMPLICIT NONE
	1179
	1180	REAL(wp) :: psi_h !< Integrated similarity function result
	1181	REAL(wp) :: zeta !< Stability parameter z/L
	1182	REAL(wp) :: x !< dummy variable
	1183
	1184	REAL(wp), PARAMETER :: a = 1.0_wp !< constant
	1185	REAL(wp), PARAMETER :: b = 0.66666666666_wp !< constant
	1186	REAL(wp), PARAMETER :: c = 5.0_wp !< constant
	1187	REAL(wp), PARAMETER :: d = 0.35_wp !< constant
	1188	REAL(wp), PARAMETER :: c_d_d = c / d !< constant
	1189	REAL(wp), PARAMETER :: bc_d_d = b * c / d !< constant
	1190
	1191
	1192	IF ( zeta < 0.0_wp ) THEN
[1788]	1193	x = SQRT( 1.0_wp - 16.0_wp * zeta )
[1691]	1194	psi_h = 2.0_wp * LOG( (1.0_wp + x ) / 2.0_wp )
	1195	ELSE
	1196	psi_h = - b * ( zeta - c_d_d ) * EXP( -d * zeta ) - (1.0_wp &
	1197	+ 0.66666666666_wp * a * zeta )**1.5_wp - bc_d_d &
	1198	+ 1.0_wp
	1199	!
	1200	!-- Old version for stable conditions (only valid for z/L < 0.5)
	1201	!-- psi_h = - 5.0_wp * zeta
	1202	ENDIF
	1203
	1204	END FUNCTION psi_h
	1205
[1697]	1206	END MODULE surface_layer_fluxes_mod

Note: See TracBrowser for help on using the repository browser.

Download in other formats:

| Impressum | ©Leibniz Universität Hannover |