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

Gunnarson, Jacob L. and Sayanagi, Kunio M. and Blalock, John J. and Fletcher, Leigh N. and Ingersoll, Andrew P. and Dyudina, Ulyana A. and Ewald, Shawn P. and Draham, Robert L. (2018) Saturn's New Ribbons: Cassini Observations of Planetary Waves in Saturn's 42N Atmospheric Jet. Geophysical Research Letters, 45 (15). pp. 7399-7408. ISSN 0094-8276. doi:10.1029/2018gl078156.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Gunnarson, Jacob L.0000-0001-9915-4330
Sayanagi, Kunio M.0000-0001-8729-0992
Blalock, John J.0000-0002-7460-1074
Fletcher, Leigh N.0000-0001-5834-9588
Ingersoll, Andrew P.0000-0002-2035-9198
Ewald, Shawn P.0000-0002-1567-9154
Additional Information:© 2018 American Geophysical Union. Received 30 MAR 2018; Accepted 6 JUL 2018; Accepted article online 11 JUL 2018; Published online 8 AUG 2018. Our data are available in the supporting information. 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.
Group:Astronomy Department
Funding AgencyGrant Number
European Research Council (ERC)723890
Subject Keywords:Saturn; Cassini; atmosphere; clouds; dynamics; waves
Issue or Number:15
Record Number:CaltechAUTHORS:20180919-140512463
Persistent URL:
Official Citation:Gunnarson, J. L., Sayanagi, K. M., Blalock, J. J., Fletcher, L. N., Ingersoll, A., Dyudina, U. A., et al. (2018). Saturn's new ribbons: Cassini observations of planetary waves in Saturn's 42N atmospheric jet. Geophysical Research Letters, 45, 7399–7408.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89756
Deposited By: Tony Diaz
Deposited On:19 Sep 2018 21:38
Last Modified:16 Nov 2021 00:38

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