SnowStorm Parametrizations

All SnowStorm parametrizations are defined as classes inheriting from the Parametrization base class and need to have a transform() method. For details on how to use/apply parametrizations/perturbers in simulation refer to SnowsStorm Configuration.

The following list is an overview of all parametrizations currently implemented:

Absorption

  • Identifier: Absorption

    This parametrization scales the overall (global) ice absorption coefficient with reference to the baseline ice model.

AnisotropyScale

  • Identifier: AnisotropyScale

    This parametrization scales the ice anisotropy strength.

Note

It does (and can) not change the direction of the anisotropy axis but change the strength of the ice anisotropy only!

DOMEfficiency

  • Identifier: AnisotropyScale

    This parametrization scales the DOMEfficiency of all DOMs with a factor. The reference DOMEfficiency is taken from the baseline ice model specified in the SnowStorm configuration file.

HoleIce

The MSU Forward HoleIce wikipage for more details on the holeIce model.

For SnowStorm, there are two parametrizations for two different HoleIce models/parametrizations:

Note

Both HoleIce models depend on two parameters! Make sure to specify a sampling distribution for both, see SnowStorm Configuration for more details.

MSU HoleIce

Unified HoleIce

  • Identifier: HoleIceForward_Unified

    More information of the unified angular acceptance model (developed by Philipp Eller) can be found on its GitHub page.

IceWavePlusModes

The IceWavePlusModes scales the ice absorption and scattering coefficients not globally but depth depend using the icewave ice model. To reduce the number of parameters (the ice is split in 10m thick layers, each with independent absorption/scattering), it uses a Fourier analysis. More details on this ice model and the Fourier decomposition can be found in the SnowStorm paper.

Scattering

  • Identifier: Scattering

    This parametrization scales the overall (global) ice scattering coefficient with reference to the baseline ice model.