Parameter name

Class

Type

Default
value

Explanation

adjust_mixing_length

I

L

.F.

Near-surface adjustment of the mixing length to the Prandtl-layer law.

alpha_surface

I

R

0.0

Inclination of the model domain with respect to the horizontal (in degrees).

averaging_interval_pr

R

R

averaging_interval_sp

P

R

bc_e_b

I

C * 20

'neumann'

Bottom boundary condition of the TKE.

bc_p_b

I

C * 20

'neumann'

Bottom boundary condition of the perturbation pressure.

bc_p_t

I

C * 20

'dirichlet'

Top boundary condition of the perturbation pressure.

Bottom boundary condition for particle transport.

bc_pt_b

I

C * 20

'dirichlet'

Bottom boundary condition of the potential temperature.

bc_pt_t

I

C * 20

'initial_gradient'

Top boundary condition of the potential temperature.

bc_q_b

I

C * 20

'dirichlet'

Bottom boundary condition of the specific humidity / total water content.

bc_q_t

I

C * 20

'neumann'

Top boundary condition of the specific humidity / total water content.

bc_s_b

I

C * 20

'dirichlet'

Bottom boundary condition of the scalar concentration.

bc_s_t

I

C * 20

´neumann´

Top boundary condition of the scalar concentration.

bc_uv_b

I

C * 20

'dirichlet'

Bottom boundary condition of the horizontal wind components u and v.

bc_uv_t

I

C * 20

'dirichlet'

Top boundary condition of the horizontal velocity components u and v.

cloud_physics

I

L

.F.

Parameter to switch on the condensation scheme.

comp_spectra_level

P

I (10)

no level

Vertical level for which horizontal spectra are to be calculated and output (gridpoints).

create_disturbances

R

L

.T.

Switch to impose random perturbations to the horizontal velocity field.

cross_normalized_x

R

C * 10 (100)

100 * ' '

Type of normalization applied to the x-coordinate of vertical profiles to be plotted with profil.

cross_normalized_y

R

C * 10 
(100)

100 * ' '

Type of normalization applied to the y-coordinate of vertical profiles to be plotted with profil.

cross_profiles

R

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

C * 40 
 (100)

see parameter description

x-axis labels of vertical profile coordinate systems to be plotted with profil.

cut_spline_overshoot

I

L

.T.

Cut off of so-called overshoots, which can occur with the upstream-spline-scheme.

cycle_mg

R

C * 1

'w'

damp_level_1d

I

R

zu(nz+1)

Height where the damping layer begins in the 1d-model (in m).

density_ratio

P

R (10)

0.0, 9 * 9999999.9

Ratio of the density of the fluid and the density of the particles.

disturbance   
 _amplitude

R

R

0.25

Maximum perturbation amplitude of the random perturbations imposed to the horizontal velocity field (in m/s).

disturbance_energy   
 _limit

R

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

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

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).

dt

I/R

R

variable

Time step for the 3d-model (in s).

dt_averaging_input_pr

R

R

Temporal interval at which data (3d volume data (instantaneous or time averaged), cross sections (instantaneous or time averaged), vertical profiles, spectra) shall be output (in s). 

Temporal interval at which time averaged 3d volume data and/or 2d cross section data shall be output (in s). 

dt_disturb

R

R

9999999.9

Temporal interval at which random perturbations are to be imposed on the horizontal velocity field (in s).

Temporal interval at which data of vertical profiles shall be output (output for printouts, local file LIST_PROFIL) (in s). 

Temporal interval at which time series data of particle quantities shall be output (in s). 

dt_dosp

P

R

dt_dots

R

R

see parameter description

Temporal interval at which time series data shall be output (in s).

dt_do2d_xy

R

R

Temporal interval at which horizontal cross section data shall be output (in s).

dt_do2d_xz

R

R

Temporal interval at which vertical cross section data (xz) shall be output (in s).

dt_do2d_yz

R

R

Temporal interval at which vertical cross section data (yz) shall be output (in s).

dt_do3d

R

R

Temporal interval at which 3d volume data shall be output (in s).

dt_prel

P

R

9999999.9

Temporal interval at which particles are to be released from a particle source (in s). 

dt_pr_1d

I

R

9999999.9

Temporal interval of vertical profile output of the 1D-model (in s). 

dt_run_control

R

R

60.0

Temporal interval at which run control output is to be made (in s).

dt_run_control_1d

I

R

60.0

Temporal interval of runtime control output of the 1d-model (in s).

dvrp_directory

P

C * 80

'default'

Name of the directory into which data created by the dvrp software shall be saved.

dvrp_file

P

C * 80

'default'

Name of the file into which data created by the dvrp software shall be output.

dvrp_host

P

C * 80

'origin.rvs.
uni- hanover.de'

Name of the computer to which data created by the dvrp software shall be transferred.

dvrp_output

P

C * 10

'rtsp'

Output mode for the dvrp software.

dvrp_password

P

C * 80

'********'

dvrp_psize

P

R

0.2 * dx

Diameter that the particles is given in visualizations with the dvrp software (in m).

dvrp_username

P

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

R

1.0

Horizontal grid spacing along the x-direction (in m).

dy

I

R

1.0

Horizontal grid spacing along the y-direction (in m).

dz

I

R

no default, see parameter description

Vertical grid spacing (in m).

dz_stretch_factor

I

R

1.08

Stretch factor for a vertically stretched grid (see dz_stretch_level).

dz_stretch_level

I

R

100000.0

Height level above/below which the grid is to be stretched vertically (in m).

end_time

R

R

0.0

Simulation time of the 3D model (in s).

end_time_1d

I

R

864000.0

Time to be simulated for the 1D-model (in s). 

fft_method

I

C * 20

'system specific'

FFT-method to be used.

force_print_header

R

L

.F.

Steering of header output to the local file RUN_CONTROL.

galilei_transformation

I

L

.F.

Application of a Galilei-transformation to the coordinate system of the model.

grid_matching

I

C * 6

'match'

Variable to adjust the subdomain sizes in parallel runs.

initializing_actions

I

C * 100

no default, see parameter description

Initialization actions to be carried out.

km_constant

I

R

variable (computed from TKE)

Constant eddy diffusivities are used (laminar simulations). 

long_filter_factor

I

R

0.0

Filter factor for the so-called Long-filter.

maximum_number_
of_particles

P

I

1000

Maximum number of particles (on a PE).

maximum_number_
of_tailpoints

P

I

100

Maximum number of tailpoints that a particle tail can have.

maximum_tailpoint_
age

P

R

100000.0

Maximum age that the end point of a particle tail is allowed to have (in s).

minimum_tailpoint_
distance

P

R

0.0

Minimum distance allowed between two adjacent points of a particle tail (in m).

mode_dvrp

P

C * 20 (10)

10 * ' '

Graphical objects (isosurfaces, slicers, particles) which are to be created by the dvrp software.

momentum_advec

I

C * 10

'pw-scheme'

Advection scheme to be used for the momentum equations.

ngsrb

R

I

2

Grid level at which data shall be gathered on PE0.

normalizing_region

R

I

0

Determines the subdomain from which the normalization quantities are calculated.

npex

I

I

no default, see parameter description

Number of processors along x-direction of the virtual processor net.

npey

I

I

no default, see parameter description

Number of processors along y-direction of the virtual processor net.

nsor

R

I

20

Number of iterations to be used with the SOR-scheme.

nsor_ini

I

I

100

Initial number of iterations with the SOR algorithm

nx

I

I

no default, see parameter description

Number of grid points in x-direction.

ny

I

I

no default, see parameter description

Number of grid points in y-direction.

nz

I

I

no default, see parameter description

Number of grid points in z-direction.

nz_do3d

R

I

nz+1

omega

I

R

7.29212E-5

Angular velocity of the rotating system (in rad s^-1). 

omega_sor

R

R

1.8

Convergence factor to be used with the the SOR-scheme.

overshoot_limit_e

I

R

0.0

Allowed limit for the overshooting of subgrid-scale TKE in case that the upstream-spline scheme is switched on (in m²/s²).

overshoot_limit_pt

I

R

0.0

Allowed limit for the overshooting of potential temperature in case that the upstream-spline scheme is switched on (in K).

overshoot_limit_u

I

R

0.0

Allowed limit for the overshooting of the u-component of velocity in case that the upstream-spline scheme is switched on (in m/s).

overshoot_limit_v

I

R

0.0

Allowed limit for the overshooting of the v-component of velocity in case that the upstream-spline scheme is switched on (in m/s).

overshoot_limit_w

I

R

0.0

Allowed limit for the overshooting of the w-component of velocity in case that the upstream-spline scheme is switched on (in m/s).

particle_maximum_age

P

R

9999999.9

Maximum allowed age of particles (in s).

passive_scalar

I

L

.F.

Parameter to switch on the prognostic equation for a passive scalar.

pdx

P

R (10)

10 * dx

Distance along x between particles within a particle source (in m).

pdy

P

R (10)

10 * dy

Distance along y between particles within a particle source (in m).

pdz

P

R (10)

10 * ( zu(2) - zu(1) )

Distance along z between particles within a particle source (in m).

phi

I

R

55.0

Geographical latitude (in degrees).

plot_spectra_level

P

I (10)

No level

Vertical level(s) for which horizontal spectra are to be plotted (in gridpoints).

prandtl_layer

I

L

.T.

Parameter to switch on a Prandtl layer.

prandtl_number

R

R

1.0

Ratio of the eddy diffusivities for momentum and heat (K_m/K_h).

profile_columns

R

I

3

Number of coordinate systems to be plotted in one row by profil.

profile_rows

R

I

2

Number of rows of coordinate systems to be plotted on one page by profil.

psb

P

R (10)

10 * zu(nz/2)

Bottom edge of a particle source (in m).

psl

P

R (10)

10 * 0.0

Left edge of a particle source (in m).

psn

P

R (10)

10 * ( ny * dy )

Rear (“north”) edge of a particle source (in m).

psolver

R

C * 10

'poisfft'

Scheme to be used to solve the Poisson equation for the perturbation pressure.

psr

P

R (10)

10 * ( nx * dx )

Right edge of a particle source (in m).

pss

P

R (10)

10 * 0.0

Front (“south”) edge of a particle source (in m).

pst

P

R (10)

10 * zu(nz/2)

Top edge of a particle source (in m).

pt_surface

I

R

300.0

Surface potential temperature (in K).

pt_surface_initial   
 _change

I

R

0.0

pt_vertical_gradient

I

R (10)

10 * 0.0

Temperature gradient(s) of the initial temperature profile (in K / 100 m).

pt_vertical_gradient   
 _level

I

R (10)

10 *  0.0

Height level from which on the temperature gradient defined by pt_vertical_gradient is effective (in m). 

q_surface

I

R

0.0

Surface specific humidity / total water content (kg/kg).

q_surface_initial
 _change

I

R

0.0

Change in surface specific humidity / total water content to be made at the beginning of the 3d run (kg/kg).

q_vertical_gradient

I

R (10)

10 * 0.0

Humidity gradient(s) of the initial humidity profile (in 1/100 m).

q_vertical_gradient
 _level

I

R (10)

10 *  0.0

Height level from which on the humidity gradient defined by q_vertical_gradient is effective (in m). 

radiation

I

L

.F.

Parameter to switch on longwave radiation cooling at cloud-tops.

random_generator

I

C * 20

'numerical recipes'

Random number generator to be used for creating uniformly distributed random numbers.

random_heatflux

I

L

.F.

Parameter to impose random perturbations on the internal two-dimensional near surface heat flux field shf.

random_start_position

P

L

.F.

Initial position of the particles is varied randomly within certain limits. 

rayleigh_damping  
 _factor

R

R

0.0 and/or 0.01 (see parameter description)

Factor for Rayleigh damping. 

rayleigh_damping  
 _height

R

R

2/3 * zu(nz)

Height where the Rayleigh damping starts (in m). 

read_particles_from_
restartfile

P

L

.T.

Read particle data from the previous run.

region

U

C * 40 (0:9)

Name(s) of the subdomain(s) defined by the user.

residual_limit

R

R

1.0E-6

Largest residual permitted for the multi-grid scheme (in s^-2m^-3).

rif_max

I

R

1.0

Upper limit of the flux-Richardson number.

rif_min

I

R

- 5.0

Lower limit of the flux-Richardson number.

roughness_length

I

R

0.1

Roughness length (in m).

scalar_advec

I

C * 10

'pw-scheme'

Advection scheme to be used for the scalar quantities.

spectra_direction

P

C * 2 (10)

10 * ' '

Direction(s) along which spectra are to be calculated.

statistic_regions

I

I

0

Number of additional user-defined subdomains for which statistical analysis and corresponding output (profiles, time series) shall be made.

superelevation

P

R

1.0

Superelevation factor for the vertical coordinate.

superelevation_x

P

R

1.0

Superelevation factor for the horizontal (x) coordinate.

superelevation_y

P

R

1.0

Superelevation factor for the horizontal (y) coordinate.

surface_heatflux

I

R

no prescribed heatflux

Kinematic sensible heat flux at the bottom surface (in K m/s).

surface_pressure

I

R

1013.25

Atmospheric pressure at the surface (in hPa)

surface_waterflux

I

R

0.0

Kinematic water flux near the surface (in m/s).

termination_time  
 _needed

R

R

35.0

CPU time needed for terminal actions at the end of a run in batch mode (in s).

threshold

P

R (10)

0.0

Threshold value for which an isosurface is to be created by the dvrp software.

timestep_scheme

I

C * 20

'runge-kutta-3'

Time step scheme to be used for integration of the prognostic variables.

ug_surface

I

R

0.0

u-component of the geostrophic wind at the surface (in m/s).

ups_limit_e

I

R

0.0

Subgrid-scale turbulent kinetic energy difference used as criterion for applying the upstream scheme when upstream-spline advection is switched on (in m²/s²).  

ups_limit_pt

I

R

0.0

Temperature difference used as criterion for applying  the upstream scheme when upstream-spline advection  is switched on (in K).

ups_limit_u

I

R

0.0

Velocity difference (u-component) used as criterion for applying the upstream scheme when upstream-spline advection is switched on (in m/s).

ups_limit_v

I

R

0.0

Velocity difference (v-component) used as criterion for applying the upstream scheme when upstream-spline advection is switched on (in m/s).

ups_limit_w

I

R

0.0

Velocity difference (w-component) used as criterion for applying the upstream scheme when upstream-spline advection is switched on (in m/s).

use_prior_plot1d  
 _parameters

R

L

.F.

Additional plot of vertical profile data with profil from preceding runs of the job chain. 

use_surface_fluxes

I

L

.F.

Parameter to steer the treatment of the subgrid-scale vertical fluxes within the diffusion terms at k=1 (bottom boundary).

use_ug_for_galilei_tr

I

L

.T.

Switch to determine the translation velocity in case that a Galilean transformation is used.

vertical_particle_advection

vg_surface

I

R

0.0

v-component of the geostrophic wind at the surface (in m/s).

wall_adjustment

I

L

.T.

Parameter to restrict the mixing length in the vicinity of the bottom boundary (and near vertical walls of a non-flat topography).

write_particle_
statistics

z_max_do1d

R

R

Height level up to which horizontally averaged profiles are to be plotted with profil (in m).

z_max_do1d  
 _normalized

R

R

determined by plot
data

Normalized height level up to which horizontally averaged profiles are to be plotted with profil.

z_max_do2d

R

R

zu(nz)

Height level up to which 2d cross sections are to be plotted with iso2d (in m).