Oxygen’s 2.4 billion year control on Earth’s atmosphere with consequences for exoplanet biosignatures
Gregory Cooke - University of LeedsApr 1, 2021
Habitability & Biosignatures
Future missions & Observatories
Biosignature false negatives
You need to be logged in to ask a question
Since the Great Oxidation Event approximately 2.4 billion years ago, oxygen (O₂) concentrations have fluctuated until reaching modern day levels, with O₂ now comprising 21% of the atmosphere. Given the geological history of terrestrial bodies in the solar system, telescopes will likely find an exoplanet in a particular geological regime, ...