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Implications of three-dimensional chemical transport in hot Jupiter atmospheres: results from a consistently coupled chemistry-radiation-hydrodynamics model by Drummond, Benjamin; Hebrard, Eric; Mayne, Nathan J.; Venot, Olivia; Ridgway, Robert J.; Changeat, Quentin; Tsai, Shang-min; Manners, James; Tremblin, Pascal; Abraham, Nathan Luke; Sing, David; Kohary, Krisztian is a scholarly article available to read on EtoBox.

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We present results from a set of simulations using a fully coupled three-dimensional (3D) chemistry-radiation-hydrodynamics model and investigate the effect of transport of chemical species by the large-scale atmospheric flow in hot Jupiter atmospheres. We couple a flexible chemical kinetics scheme to the Met Office Unified Model which enables the study of the interaction of chemistry, radiative transfer and fluid dynamics. We use a newly-released "reduced" chemical network comprising 30 chemical species that has been specifically developed for application in 3D atmosphere models. We simulate the atmospheres of the well-studied hot Jupiters HD~209458b and HD~189733b which both have dayside--nightside temperature contrasts of several hundred Kelvin and superrotating equatorial jets. We find qualitatively quite different chemical structures between the two planets, particularly for methane (CH$_4$), when advection of chemical species is included. Our results show that consideration of 3D chemical transport is vital in understanding the chemical composition of hot Jupiter atmospheres. 3D mixing leads to significant changes in the abundances of absorbing gas-phase species compared with

Author

Drummond, Benjamin; Hebrard, Eric; Mayne, Nathan J.; Venot, Olivia; Ridgway, Robert J.; Changeat, Quentin; Tsai, Shang-min; Manners, James; Tremblin, Pascal; Abraham, Nathan Luke; Sing, David; Kohary, Krisztian

Published

2020

Language

EN