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EP: Fachverband Extraterrestrische Physik

EP 3: EW 2/Space-Weather-2

EP 3.5: Hauptvortrag

Dienstag, 10. März 2015, 09:45–10:15, G.10.02 (HS 9)

Ionization of the atmosphere caused by energetic particles — •Jan Maik Wissing — Institute of Environmental Systems Research, University of Osnabrück, Germany

Energetic particles from different sources are precipitating into the atmosphere, causing ionization and different chemical follow-ups. Focussing on low and mid-energies, this presentation will concentrate on the solar and magnetospheric particle spectrum, representing the particle forcing from the thermosphere down to the tropopause. While the precipitation of solar particles can be described in simple patterns, the magnetospheric precipitation is intensively modulated by the geomagnetic field, varying with latitude, longitude, geomagnetic disturbance, and MLT, ending up in a fluctuating auroral oval.

This presentation will give an overview on the progress that has been made in determining the particle induced ionization as well as show the remaining limitations in this field.

Even though the presentation focuses on the Atmospheric Ionization Module OSnabrueck (AIMOS; based on a Geant4 Monte-Carlo simulation for particle interactions with the atmosphere and in-situ particle measurements from the POES and GOES satellites) results are also applicable for other ionization models that use satellite-born particle measurements.