Climate variations on Earth-like circumbinary planets

Max Popp () and Siegfried Eggl
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Max Popp: Max Planck Institute for Meteorology
Siegfried Eggl: Jet Propulsion Laboratory, California Institute of Technology

Nature Communications, 2017, vol. 8, issue 1, 1-12

Abstract: Abstract The discovery of planets orbiting double stars at close distances has sparked increasing scientific interest in determining whether Earth-analogues can remain habitable in such environments and how their atmospheric dynamics is influenced by the rapidly changing insolation. In this work we present results of the first three-dimensional numerical experiments of a water-rich planet orbiting a double star. We find that the periodic forcing of the atmosphere has a noticeable impact on the planet’s climate. Signatures of the forcing frequencies related to the planet’s as well as to the binary’s orbital periods are present in a variety of climate indicators such as temperature and precipitation, making the interpretation of potential observables challenging. However, for Earth-like greenhouse gas concentrations, the variable forcing does not change the range of insolation values allowing for habitable climates substantially.

Date: 2017
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DOI: 10.1038/ncomms14957

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