The Polar Stratosphere of Jupiter
Vincent Hue, Thibault Cavali\'e, James A. Sinclair, Xi Zhang, Bilal, Benmahi, Pablo Rodr\'iguez-Ovalle, Rohini S. Giles, Tom S. Stallard, Rosie E., Johnson, Michel Dobrijevic, Thierry Fouchet, Thomas K. Greathouse, Denis C., Grodent, Ricardo Hueso, Olivier Mousis, Conor A. Nixon

TL;DR
This paper reviews recent research on Jupiter's polar stratosphere, highlighting how auroral particle precipitations influence chemical distributions, thermal structure, and the complex interplay of chemistry and dynamics in the upper atmosphere.
Contribution
It synthesizes current understanding of auroral impacts on Jupiter's polar atmosphere, emphasizing ion-neutral reactions, jet dynamics, and the resulting chemical and haze distributions.
Findings
Auroral particle precipitations alter hydrocarbon abundances.
Ion-neutral reactions produce species with specific spatial distributions.
Dynamical decoupling leads to polar and subpolar haze systems.
Abstract
Observations of the Jovian upper atmosphere at high latitudes in the UV, IR and mm/sub-mm all indicate that the chemical distributions and thermal structure are broadly influenced by auroral particle precipitations. Mid-IR and UV observations have shown that several light hydrocarbons (up to 6 carbon atoms) have altered abundances near Jupiter's main auroral ovals. Ion-neutral reactions influence the hydrocarbon chemistry, with light hydrocarbons produced in the upper stratosphere, and heavier hydrocarbons as well as aerosols produced in the lower stratosphere. One consequence of the magnetosphere-ionosphere coupling is the existence of ionospheric jets that propagate into the neutral middle stratosphere, likely acting as a dynamical barrier to the aurora-produced species. As the ionospheric jets and the background atmosphere do not co-rotate at the same rate, this creates a complex…
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