Zobrazeno 1 - 10 of 33 pro vyhledávání: '"Titz, Ruth"'
1
Report
Biomarker Response to Galactic Cosmic Ray-Induced NOx and the Methane Greenhouse Effect in the Atmosphere of an Earthlike Planet Orbiting an M-Dwarf Star
Autor: Grenfell, John Lee, Griessmeier, Jean-Mathias, Patzer, Beate, Rauer, Heike, Segura, Antigona, Stadelmann, Anja, Stracke, Barbara, Titz, Ruth, von Paris, Philip
Planets orbiting in the habitable zone (HZ) of M-Dwarf stars are subject to high levels of galactic cosmic rays (GCRs) which produce nitrogen oxides in earthlike atmospheres. We investigate to what extent this NOx may modify biomarker compounds such
Externí odkaz: http://arxiv.org/abs/astro-ph/0702622
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2
Report
The Response of Atmospheric Chemistry on Earthlike Planets around F, G and K Stars to Small Variations in Orbital Distance
Autor: Grenfell, John Lee, Stracke, Barbara, von Paris, Philip, Patzer, Beate, Titz, Ruth, Segura, Antigona, Rauer, Heike
One of the prime goals of future investigations of extrasolar planets is to search for life as we know it. The Earth's biosphere is adapted to current conditions. How would the atmospheric chemistry of the Earth respond if we moved it to different or
Externí odkaz: http://arxiv.org/abs/astro-ph/0610460
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3
Report
Potential of Ozone Formation by the Smog Mechanism to shield the surface of the Early Earth from UV radiation?
Autor: Grenfell, John Lee, Stracke, Barbara, Patzer, Beate, Titz, Ruth, Rauer, Heike
We propose that the photochemical smog mechanism produced substantial ozone (O3) in the troposphere during the Proterozoic, which contributed to ultraviolet (UV) radiation shielding hence favoured the establishment of life. The smog mechanism is well
Externí odkaz: http://arxiv.org/abs/astro-ph/0609219
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