3D simulations of oxygenated rocky exoplanet atmospheres and observational predictions

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• Gregory Cooke (IoA)
• Tuesday 03 October 2023, 13:00-14:00
• Ryle seminar room + ONLINE - Details to be sent by email.

If you have a question about this talk, please contact Dr Emily Sandford.

Following the Great Oxidation Event, Earth’s atmosphere has been oxygenated for the past 2.4 billion years, bringing changes to our biosphere which eventually enabled the proliferation of animal life. I use a three-dimensional Earth System Model, which employs coupled physics and chemistry, known as the Whole Atmosphere Community Climate Model (WACCM6), to simulate Earth’s oxygenated paleoclimates. Additionally, I perform simulations of TRAPPIST -1e and Proxima Centauri b (two habitable zone exoplanets) over a range of oxygen (O2) concentrations. I use these simulations as input to the Planetary Spectrum Generator (a radiative transfer suite) to predict telescope observations from these exoplanet scenarios. I will explore how atmospheric O2 influences atmospheric chemistry, planetary habitability, and the observability of biosignature gases in exoplanet atmospheres from afar.

This talk is part of the Exoplanet Seminars series.

This talk is included in these lists:

• Combined External Astrophysics Talks DAMTP
• Cosmology, Astrophysics and General Relativity
• Exoplanet Seminars
• Institute of Astronomy Talk Lists
• LCLU Departmental Talks
• Ryle seminar room + ONLINE - Details to be sent by email

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