A planetary-scale heat wave in Jupiter's mid-latitude upper atmosphere
- 1JAXA, Department of Solar System Science ISAS, Sagamihara, Japan (email@example.com)
- 2Center for Space Physics, Boston University, Boston, Massachusetts, USA
- 3Department of Physics, Aberystwyth University, UK
- 4Department of Physics and Astronomy, University of Leicester, Leicester, UK
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.
How to cite: O'Donoghue, J., Moore, L., Bhakyapaibul, T., Johnson, R., Melin, H., and Stallard, T.: A planetary-scale heat wave in Jupiter's mid-latitude upper atmosphere, Europlanet Science Congress 2022, Granada, Spain, 18–23 Sep 2022, EPSC2022-373, https://doi.org/10.5194/epsc2022-373, 2022.