konrad.cloud.ClearSky.__init__

ClearSky.__init__(numlevels, cloud_fraction=0, mass_ice=0, mass_water=0, ice_particle_size=20, droplet_radius=10, lw_optical_thickness=0, sw_optical_thickness=0, forward_scattering_fraction=0, asymmetry_parameter=0.85, single_scattering_albedo=0.9, rrtmg_cloud_optical_properties='liquid_and_ice_clouds', rrtmg_cloud_ice_properties='ebert_curry_two')

Create a cloud. Which of the input parameters are used and which ignored depends on the set-up of the radiation scheme.

Parameters

  • numlevels (int) – Number of atmospheric levels.

  • cloud_fraction (float / ndarray / DataArray) – cloud area fraction

  • mass_ice (float / ndarray / DataArray) – mass content of cloud ice [kg m-2]

  • mass_water (float / ndarray / DataArray) – mass content of cloud liquid water [kg m-2]

  • ice_particle_size (float / ndarray / DataArray) – cloud ice particle size [micrometers]

  • droplet_radius (float / ndarray / DataArray) – cloud water droplet radius [micrometers]

  • lw_optical_thickness (float / DataArray) – longwave optical thickness of the cloud

  • sw_optical_thickness (float / DataArray) – shortwave optical thickness of the cloud

  • forward_scattering_fraction (float / DataArray) – cloud forward scattering fraction (for the shortwave component of RRTMG) This is a scaling factor for the other shortwave parameters, if it is set to 0, no scaling is applied.

  • asymmetry_parameter (float / DataArray) – cloud asymmetry parameter (for the shortwave component of RRTMG)

  • single_scattering_albedo (float / DataArray) – single scattering albedo due to cloud (for the shortwave component of RRTMG)

  • rrtmg_cloud_optical_properties (str) –

    Choose how cloud properties are calculated by RRTMG.

    • direct_input

      Both cloud fraction and optical depth must be input directly to the konrad.cloud instance. Other cloud properties are irrelevant.

    • single_cloud_type

      Cloud fraction (1 or 0 at each level) and cloud physical properties are required as input. Ice and liquid water clouds are treated together, with a constant value of cloud absorptivity. Not available with mcica.

    • liquid_and_ice_clouds

      Cloud fraction and cloud physical properties are required as input. Ice and liquid clouds are treated separately. Cloud optical depth is calculated from the cloud ice and water particle sizes and the mass content of cloud and water.

  • rrtmg_cloud_ice_properties (str) –

    Choose which method is used to calculate the cloud optical properties of ice clouds from their physical properties.

    • ebert_curry_one

    • ebert_curry_two

    • key_streamer_manual

    • fu