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.
cross_profiles	R	output	C*100(100)	see parameter description	Determines which vertical profiles are to be presented in which coordinate system if the plot software profil is used.
cross_xtext	R	output	C*40(100)	see parameter description	x-axis labels of vertical profile coordinate systems to be plotted with profil.
cthf	R	canopy	R	0.0	Average heat flux that is prescribed at the top of the plant canopy (in K m/s).
cycle_mg	I	num	C*1	'w'	Type of cycle to be used with the multi-grid method.
damp_level_1d	I	ini	R	zu(nz + 1)	Height where the damping layer begins in the 1d-model (in m).
data_output	R	output	C*10(100)	100*' '	Quantities for which 2d cross section and/or 3d volume data are to be output.
data_output_format	R	output	C*10(10)	'netCDF'	Format of output data.
data_output_pr	R	output	C*10(100)	100*' '	Quantities for which vertical profiles (horizontally averaged) are to be output.
data_output_pr_user	U	output	C*10(200)	200*' '	User defined quantities for which horizontally averaged profile data is to be output.
data_output_on_each_pe	R	output	L	.T.	Output 2d cross section data by one or all processors.
density_ratio	P	particles	R(10)	0.0, 9*9999999.9	Ratio of the density of the fluid and the density of the particles.
dissipation_id	I	ini	C*20	'as_in_3d_model'	Calculation method for the energy dissipation term in the TKE equation of the 1d-model.
disturbance_amplitude	R	run steering	R	0.25	Maximum perturbation amplitude of the random perturbations imposed to the horizontal velocity field (in m/s).
disturbance_energy_limit	R	run steering	R	0.01	Upper limit value of the perturbation energy of the velocity field used as a criterion for imposing random perturbations (in m2/s2).
disturbance_level_b	R	run steering	R	zu(3) or zu(nz*2/3)	Lower limit of the vertical range for which random perturbations are to be imposed on the horizontal wind field (in m).
disturbance_level_t	R	run steering	R	zu(nz/3) or zu(nzt-3)	Upper limit of the vertical range for which random perturbations are to be imposed on the horizontal wind field (in m).
do2d_at_begin	R	output	L	.F.	Output 2d cross section data by one or all processors.
do3d_at_begin	R	output	L	.F.	Output of 3d volume data at the beginning of a run.
do3d_compress	R	output	L	.F.	Output of data for 3d plots in compressed form.
do3d_comp_prec	R	output	C*7(100)	see parameter description	Significant digits in case of compressed data output.
dp_external	R	mode	L	.F.	External pressure gradient switch.
dp_smooth	R	mode	L	.F.	Vertically smooth the external pressure gradient using a sinusoidal smoothing function.
dp_level_b	R	mode	R	0.0	Lower limit of the vertical range for which the external pressure gradient is applied (in m).
dpdxy	R	mode	R(2)	2*0.0	Values of the external pressure gradient applied in x- and y-direction, respectively (in Pa/m).
drag_coefficient	I	canopy	R	0.0	Drag coefficient used in the plant canopy model.
dt	R	run steering	R	variable	Time step for the 3d-model (in s).
dt_averaging_input	R	output	R	0.0	Temporal interval of data which are subject to temporal averaging (in s).
dt_averaging_input_pr	R	output	R	value of dt_averaging_input	Temporal interval of data which are subject to temporal averaging of vertical profiles and/or spectra (in s).
dt_coupling	R	ocean	R	9999999.9	Temporal interval for the data exchange in case of runs with coupled models (e.g. atmosphere - ocean) (in s).
dt_data_output	R	output	R	9999999.9	Temporal interval at which data (3d volume data, cross sections, vertical profiles, spectra) shall be output (in s).
dt_data_output_av	R	output	R	value of dt_data_output	Temporal interval at which time averaged 3d volume data and/or 2d cross section data shall be output (in s).
dt_disturb	R	run steering	R	9999999.9	Temporal interval at which random perturbations are to be imposed on the horizontal velocity field (in s).
dt_dopr	R	output	R	value of dt_data_output	Temporal interval at which data of vertical profiles shall be output (to local file DATA_1D_PR_NETCDF (in s).
dt_dopr_listing	R	output	R	9999999.9	Temporal interval at which data of vertical profiles shall be output (output for printouts, local file LIST_PROFIL) (in s).
dt_dopts	P	output	R	value of dt_data_output	Temporal interval at which time series data of particle quantities shall be output (in s).
dt_dosp	P	output	R	value of dt_data_output	Temporal interval at which spectra data shall be output (in s).
dt_dots	R	output	R	see parameter description	Temporal interval at which time series data shall be output (in s).
dt_do2d_xy	R	output	R	value of dt_data_output	Temporal interval at which horizontal cross section data shall be output (in s).
dt_do2d_xz	R	output	R	value of dt_data_output	Temporal interval at which vertical cross section data (xz) shall be output (in s).
dt_do2d_yz	R	output	R	value of dt_data_output	Temporal interval at which vertical cross section data (yz) shall be output (in s).
dt_do3d	R	output	R	value of dt_data_output	Temporal interval at which 3d volume data shall be output (in s).
dt_dvr	P	dvr	R	9999999.9	Temporal interval of scenes to be displayed with the dvrp software (in s).
dt_max	R	run steering	R	20.0	Maximum allowed value of the timestep (in s).
dt_min_part	P	particles	R	0.0002	Minimum value for the particle timestep when SGS velocities are used (in s).
dt_prel	P	particles	R	9999999.9	Temporal interval at which particles are to be released from a particle source (in s).
dt_pr_1d	I	ini	R	9999999.9	Temporal interval of vertical profile output of the 1D-model (in s).
dt_restart	R	run steering	R	9999999.9	Temporal interval at which a new restart run is to be carried out (in s).
dt_run_control	R	output	R	60.0	Temporal interval at which run control output is to be made (in s).
dt_run_control_1d	I	ini	R	60.0	Temporal interval of runtime control output of the 1d-model (in s).
dt_sort_particles	P	particles	R	0.0	Temporal interval for sorting particles (in s).
dt_write_particle_data	P	particles	R	9999999.9	Temporal interval for output of particle data (in s).
dvrp_directory	P	dvr	C*80	'default'	Name of the directory into which data created by the dvrp software shall be saved.
dvrp_file	P	dvr	C*80	'default'	Name of the file into which data created by the dvrp software shall be output.
dvrp_host	P	dvr	C*80	'origin.rvs uni-hannover.de'	Name of the computer to which data created by the dvrp software shall be transferred.
dvrp_output	P	dvr	C*10	'rtsp'	Output mode for the dvrp software.
dvrp_password	P	dvr	C*80	''	Password for the computer to which data created by the dvrp software is to be transferred.
dvrp_psize	P	dvr	R	0.2*dx	Diameter that the particles is given in visualizations with the dvrp software (in m).
dvrpsize_interval	P	dvr	R(2)	0.0, 1.0	Interval of values used for determining the particle size displayed in the animation.
dvrp_username	P	dvr	C*80	no default value	User name of a valid account on the computer to which data created by the dvrp software is to be transferred.
dx	I	grid	R	1.0	Horizontal grid spacing along the x-direction (in m).
dy	I	grid	R	1.0	Horizontal grid spacing along the y-direction (in m).
dz	I	grid	R	no default value, see parameter description	Vertical grid spacing (in m).
dz_max	I	grid	R	9999999.9	Allowed maximum vertical grid spacing (in m).
dz_stretch_factor	I	grid	R	1.08	Stretch factor for a vertically stretched grid (see dz_stretch_level).
dz_stretch_level	I	grid	R	100000.0	Height level above/below which the grid is to be stretched vertically (in m).
e_init	I	mode	R	0.0	Initial TKE in m2s-2.
e_min	I	mode	R	0.0	Minimum TKE in m2s-2.
end_time	R	run steering	R	0.0	Simulation time of the 3D model (in s).
end_time_prel	P	particles	R	9999999.9	Time of the last release of particles (in s).
end_time_1d	I	ini	R	864000.0	Time to be simulated for the 1D-model (in s).
fft_method	I	num	C*20	'system specific'	FFT-method to be used.
force_print_header	R	output	L	.F.	Steering of header output to the local file RUN_CONTROL.
galilei_transformation	I	mode	L	.F.	Application of a Galilei-transformation to the coordinate system of the model.
grid_matching	I	grid	C*6	'strict'	Variable to adjust the subdomain sizes in parallel runs.
groundplate_color	P	dvr	R(3)	0.0, 0.6, 0.0	Color of the ground plate.
humidity	I	mode	L	.F.	Parameter to switch on the prognostic equation for specific humidity q.
inflow_damping_height	I	bc	R	from precursor run	Height below which the turbulence signal is used for turbulence recycling (in m).
inflow_damping_width	I	bc	R	0.1* inflow_damping_height	Transition range within which the turbulance signal is damped to zero (in m).
inflow_disturbance_begin	I	bc	I	MIN(10, nx/2 or ny/2)	Lower limit of the horizontal range for which random perturbations are to be imposed on the horizontal velocity field (gridpoints).
inflow_disturbance_end	I	bc	I	MIN(100, 3/4*nx or 3/4*ny)	Upper limit of the horizontal range for which random perturbations are to be imposed on the horizontal velocity field (gridpoints).
initializing_actions	I	ini	C*100	no default value, see parameter description	Initialization actions to be carried out.
initial_weighting_factor	P	particles	R	1.0	Factor to define the real number of initial droplets in a grid cell.
isosurface_color	P	dvr	R(3,10)	0.9, 0.9, 0.9 0.8, 0.1, 0.1 ...	Color of the isosurface(s).
km_constant	I	mode	R	variable (computed) from TKE)	Constant eddy diffusivities are used (laminar simulations).
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