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Published August 16, 2018 | Supplemental Material + Published
Journal Article Open

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


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.

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.

Attached Files

Published - Gunnarson_et_al-2018-Geophysical_Research_Letters.pdf

Supplemental Material - grl57730-sup-0001-supplementary.pdf

Supplemental Material - grl57730-sup-0002-supplementary.avi

Supplemental Material - grl57730-sup-0003-supplementary.avi

Supplemental Material - grl57730-sup-0004-supplementary.csv

Supplemental Material - grl57730-sup-0005-supplementary.zip


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August 21, 2023
August 21, 2023