A planetary-scale heat wave in Jupiter's mid-latitude upper atmosphere

James O'Donoghue, Luke Moore, Tanapat Bhakyapaibul, Rosie Johnson, Henrik Melin, Tom Stallard

Allbwn ymchwil: Cyfraniad at gynhadleddCrynodeb

Crynodeb

At Jupiter, magnetosphere-ionosphere coupling gives rise to intense auroral emissions and enormous energy deposition in the magnetic polar regions. Here we show ground-based maps of Jupiter's upper atmosphere temperatures obtained via the emissions of the major upper-atmospheric ion, H3+. The maps have a spatial resolution of 2o longitude and latitude from pole to equator and trace the global temperature gradient. We find that temperatures decrease steadily from the auroral polar regions to the equator, indicating that the aurora act as a planet-wide heating source. However, during a period of enhanced activity in the auroral region which models imply was due to a solar wind compression, a high-temperature planetary-scale-sized structure was also observed on top of this gradient. This presentation reports on the particulars of this feature, including how it appears to be propagating away from the main auroral oval (as determined by estimates of the features' velocity at several longitudes) and its subsequent implications for global energy circulation at Jupiter and other planets.
Iaith wreiddiolSaesneg
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 23 Medi 2022
DigwyddiadEuroplanet Science Congress - Granada, Sbaen
Hyd: 18 Medi 202223 Medi 2022
Rhif y gynhadledd: 2022

Cynhadledd

CynhadleddEuroplanet Science Congress
Teitl crynoEPSC2022
Gwlad/TiriogaethSbaen
DinasGranada
Cyfnod18 Medi 202223 Medi 2022

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