Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 32, issue 12
Articles | Volume 32, issue 12
https://doi.org/10.5194/angeo-32-1463-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/angeo-32-1463-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 32, issue 12
Regular paper
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04 Dec 2014
Regular paper | Highlight paper |  | 04 Dec 2014

A possible influence of the Great White Spot on Saturn kilometric radiation periodicity

G. Fischer, S.-Y. Ye, J. B. Groene, A. P. Ingersoll, K. M. Sayanagi, J. D. Menietti, W. S. Kurth, and D. A. Gurnett

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Short summary
In this paper we show that the large thunderstorm called the "Great White Spot", which raged for about 9 months in Saturn's troposphere in 2010/2011, was accompanied by changes in the periodicity and phasing of auroral radio emissions. We suggest that the thunderstorm was a source of intense gravity waves causing a global change in Saturn’s ionospheric winds via energy and momentum deposition. This supports the theory that Saturn’s magnetospheric periodicities are driven by the upper atmosphere.
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