Open Access BASE2020

Lightning in other planets

Helling, Christiane

Open Access

Abstract

The funding from the European commission is acknowledged under which part of this research was conducted. We highlight financial support of the European Union under the FP7 by an ERC starting grant number 257431. ; More than 4000 planet are known that orbit stars other than our Sun. Many harbor a dynamic atmosphere that is cold enough that cloud particles can form in abundance. The diversity of exoplanets leads to differences in cloud coverage depending on global system parameters. Some planets will be fully covered in clouds, some have clouds on the nightside but are largely cloud-free on the dayside. These cloud particles can easily be charged and lightning discharges will occur in cloudy, dynamic exoplanet atmosphere. Lightning supports a Global Electric Circuit (GCE) on Earth and we argue that exoplanet may develop a GCE in particular if parts of the exoplanet atmospheres can remain cloud free. ; Publisher PDF ; Peer reviewed

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