Listing of the steering parameters in alphabetical order

Initialization parameters (NAMELIST Group = I), run parameters (R), package parameters (P) as well as user-defined parameters (U) are alphabetically listed in the following table.

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Parameter Name	NAMELIST Group	Parameter Class	FORTRAN Type	Default Value	Explanation
adjust_mixing_length	I	bc	L	.F.	Near-surface adjustment of the mixing length to the Prandtl-layer law.
alpha_surface	I	others	R	0.0	Inclination of the model domain with respect to the horizontal (in degrees).
averaging_interval	R	output	R	0.0	Averaging interval for all output of temporally averaged data (in s).
averaging_interval_pr	R	output	R	value of averaging_interval	Averaging interval for vertical profiles output to local file DATA_1D_PR_NETCDF (in s).
averaging_interval_sp	R	output	R	value of averaging_interval	Averaging interval for spectra output to local file DATA_1D_SP_NETCDF (in s).
bc_e_b	I	bc	C*20	'neumann'	Bottom boundary condition of the TKE.
bc_lr	I	bc	C*20	'cyclic'	Boundary condition along x (for all quantities).
bc_ns	I	bc	C*20	'cyclic'	Boundary condition along y (for all quantities).
bc_p_b	I	bc	C*20	'neumann'	Bottom boundary condition of the perturbation pressure.
bc_par_b	P	bc	C*15	'reflect'	Bottom boundary condition for particle transport.
bc_par_lr	P	bc	C*15	'cyclic'	Lateral boundary condition (x-direction) for particle transport.
bc_par_ns	P	bc	C*15	'cyclic'	Lateral boundary condition (y-direction) for particle transport.
bc_par_t	P	bc	C*15	'absorb'	Top boundary condition for particle transport.
bc_pt_b	I	bc	C*20	'dirichlet'	Bottom boundary condition of the potential temperature.
bc_pt_t	I	bc	C*20	'initial_gradient'	Top boundary condition of the potential temperature.
bc_q_b	I	bc	C*20	'dirichlet'	Bottom boundary condition of the specific humidity / total water content.
bc_q_t	I	bc	C*20	'neumann'	Top boundary condition of the specific humidity / total water content.
bc_s_b	I	bc	C*20	'dirichlet'	Bottom boundary condition of the scalar concentration.
bc_st	I	bc	C*20	'neumann'	Top boundary condition of the scalar concentration.
bc_sa_t	I	bc	C*20	'neumann'	Top boundary condition of the salinity.
bc_uv_t	I	bc	C*20	'dirichlet'	Bottom boundary condition of the horizontal wind components u and v.
bc_uv_t	I	bc	C*20	'dirichlet'	Top boundary condition of the horizontal velocity components u and v.
bottom_salinityflux	I	bc	R	0.0	Kinematic salinity flux near the surface (in psu m/s).
building_height	I	topo	R	50.0	Height of a single building in m.
building_length_x	I	topo	R	50.0	Width of a single building in m.
building_length_y	I	topo	R	50.0	Depth of a single building in m.
building_wall_left	I	topo	R	building centered in x-direction	x-coordinate of the left building wall in m.
building_wall_south	I	topo	R	building centered in y-direction	y-coordinate of the South building wall in m.
call_psolver_at_all_substeps	I	num	L	T	Switch to steer the call of the pressure solver.
canopy_mode	I	canopy	C*20	'block'	Canopy mode.
canyon_height	I	topo	R	50.0	Street canyon height in m.
canyon_width_x	I	topo	R	9999999.9	Street canyon width in x-direction in m.
canyon_width_y	I	topo	R	9999999.9	Street canyon width in y-direction in m.
canyon_wall_left	I	topo	R	canyon centered in x-direction	x-coordinate of the left canyon wall in m.
canyon_wall_south	I	topo	R	canyon centered in y-direction	y-coordinate of the South canyon wall in m.
cfl_factor	R	num	R	0.1, 0.8 or 0.9 (see parameter description)	Time step limiting factor.
clip_dvrp_l	P	dvr	R	0.0	Left boundary of the displayed domain (in m).
clip_dvrp_n	P	dvr	R	(ny + 1)*dy	North boundary of the displayed domain (in m).
clip_dvrp_r	P	dvr	R	(nx + 1)*dx	Right boundary of the displayed domain (in m).
clip_dvrp_s	P	dvr	R	0.0	South boundary of the displayed domain (in m).
cloud_droplets	I	mode	L	.F.	Parameter to switch on usage of cloud droplets.
cloud_physics	I	mode	L	.F.	Parameter to switch on the condensation scheme.
cluster_size	P	dvr	I	1	Vertex cluster size for polygon reduction of topography.
color_interval	P	dvr	R(2)	0.0, 1.0	Interval of values used for determining the particle color displayed in the animation.
comp_spectra_level	P	output	I(100)	no level	Vertical level for which horizontal spectra are to be calculated and output (gridpoints).
conserve_volume_flow	I	mode	L	.F.	Conservation of volume flow in x- and y-direction.
conserve_volume_flow_mode	I	mode	C*16	'default'	Modus of volume flow conservation.
coupling_start_time	I	mode	R	0.0	Simulation time of a precursor run..
create_disturbances	R	run steering	L	.T.	Switch to impose random perturbations to the horizontal velocity field.
cross_normalized_x	R	output	C*10(100)	100*' '	Type of normalization applied to the x-coordinate of vertical profiles to be plotted with 'profil'.
cross_normalized_y	R	output	C*10(100)	100*' '	Type of normalization applied to the y-coordinate of vertical profiles to be plotted with 'profil'.
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