Jupiter's Atmospheric Variability from Long-Term Ground-Based Observations at 5 microns
Abstract
We use ground-based 5-µm data captured between 1984 and 2018 by 8 different instruments to study the long-term temporal variability of Jupiter's belts and zones at the 1-4 bar pressure level. The data show a large temporal variability mainly at the equatorial and tropical latitudes, with a smaller temporal variability at mid-latitudes. A comparison of the location of the 5-µm-dark and -bright regions and the belts and zones at visible wavelengths show that these regions are not always co-located, especially in the southern hemisphere. Lomb-Scargle and Wavelet Transform analyses show that some of the variations of the banded structure occur periodically in time intervals of 4-8 years. Finally, a Principal Component Analysis reveals a clear anticorrelation on the 5-µm brightness changes between the North Equatorial Belt and the South Equatorial Belt.
- Publication:
-
EPSC-DPS Joint Meeting 2019
- Pub Date:
- September 2019
- Bibcode:
- 2019EPSC...13..452A