Bremen 2017 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 5: Postersitzung I
EP 5.9: Poster
Dienstag, 14. März 2017, 16:30–18:00, GW2 2.OG
Effects of Key GCR and SEP Shower Parameters in Earth-like Atmospheres — •Markus Scheucher1, John Lee Grenfell2, and Heike Rauer1,2 — 1Department of Astronomy and Astrophysics (ZAA), Berlin Institute of Technology (TUB), Hardenbergstr. 35, 10623 Berlin, Germany — 2Department of Extrasolar Planets and Atmospheres (EPA), German Aerospace Center (DLR), Rutherfordstr. 2, 12489 Berlin, Germany
To investigate the habitability of planets having Earth-like (N2-O2 dominated) atmospheres orbiting in the Habitable Zone of quiet and active M-dwarf stars, it is necessary to determine the effect of stellar radiation and the incoming energetic particle fluxes upon atmospheric composition and temperature. Planetary atmospheres are constantly bombarded by Galactic Cosmic Rays (GCRs) and Stellar Energetic Particles (SEPs), which can create showers of secondary particles down to the surface. We perform a study investigating the influence of key particle shower parameters, by varying secondary particles production profiles, NOx and HOx production efficiencies, and model their effects upon atmospheric composition and temperature in a cloud-free 1D climate-chemistry model.