Jupiter's North Equatorial Belt and Jet, I, Cyclic expansions and planetary waves
John H. Rogers

TL;DR
This paper reviews Jupiter's North Equatorial Belt activity from 1986 to 2010, focusing on cyclic expansions, planetary waves, and their effects on belt features and dynamics.
Contribution
It provides a detailed analysis of NEB expansion events, their impact on belt features, and evidence linking dark formations to planetary Rossby waves and higher-frequency wave phenomena.
Findings
NEE events occur every 3-5 years and involve belt expansion.
Dark formations' speeds are consistent with planetary Rossby waves.
Detection of smaller, faster features suggests higher-frequency waves.
Abstract
This article presents a synopsis of the activity in Jupiter's North Equatorial Belt (NEB) from 1986 to 2010, and of the speeds of dark formations on its south edge and bright streaks ('rifts') in its interior. In particular I discuss NEB expansion events (NEEs), which took place every 3-5 years during this time, and how the various features of the NEB are involved in them. I present evidence that the NEE affects not just the northern edge, but the whole width of the belt. It begins with an outbreak of a bright rift that is more northerly and slower-moving than usual; this is often involved with the first ejection of dark material northwards into the N. Tropical Zone, but typically the rift also expands southwards across the width of the NEB. NEBs dark formations are usually affected, as they are during individual interactions with rifts at other times; they may be disrupted, or…
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Taxonomy
TopicsAstro and Planetary Science · Stellar, planetary, and galactic studies · Scientific Research and Discoveries
