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Saturn's New Ribbons: Cassini Observations of Planetary Waves in Saturn's 42N Atmospheric Jet

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journal contribution
posted on 2019-07-01, 14:02 authored by JL Gunnarson, KM Sayanagi, JJ Blalock, LN Fletcher, AP Ingersoll, UA Dyudina, SP Ewald, RL Draham
Using images from the Cassini spacecraft, we analyzed three ribbon waves in Saturn's 42°N eastward jet at 45°N, 42°N, and 39°N planetocentric latitudes. In this report, we demonstrate that the morphology, wavelength, and propagation of the ribbon waves are consistent with barotropic Rossby waves with a smaller baroclinic component. We report on the appearance and disappearance of these waves during Cassini's mission. We suggest that the temporal evolution of these waves are related to the great Saturn storm of 2010–2011.

Funding

We used Cassini ISS images available from the Planetary Data System (PDS). We also acknowledge use of the GNU parallel software (Tange, 2011) for processing images used in this study. We thank R. G. Cosentino and an anonymous reviewer for their comments, which greatly strengthened this report. This work was supported by NASA Cassini Data Analysis Program grant NNX15AD3392 to K. M. S. L. N. F. was supported by a Royal Society Research Fellowship and European Research Council Consolidator Grant (under the European Union's Horizon 2020 research and innovation program, grant agreement 723890) at the University of Leicester. Supporting Information

History

Citation

Geophysical Research Letters, 2018, 45 (15), pp. 7399-7408

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

  • VoR (Version of Record)

Published in

Geophysical Research Letters

Publisher

American Geophysical Union (AGU), Wiley

issn

0094-8276

eissn

1944-8007

Acceptance date

2018-07-06

Copyright date

2018

Available date

2019-07-01

Publisher DOI

Publisher version

https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GL078156

Notes

Our data are available in the supporting information. Supporting Information: • Supporting Information SI • Movie S1 • Movie S2 • Data Set S1 • Data Set S2

Language

en

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    Keywords

    SaturnCassiniatmospherecloudsdynamicswaves

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    All Rights Reserved

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