Dyudina, Ulyana A. and Ingersoll, Andrew P. and Ewald, Shawn P. and Vasavada, Ashwin R. and West, Robert A. and Baines, Kevin H. and Momary, Thomas W. and Del Genio, Anthony D. and Barbara, John M. and Porco, Carolyn C. and Achterberg, Richard K. and Flasar, E. Michael and Simon-Miller, Amy A. and Fletcher, Leigh N. (2009) Saturn's south polar vortex compared to other large vortices in the solar system. Icarus, 202 (1). pp. 240-248. ISSN 0019-1035 http://resolver.caltech.edu/CaltechAUTHORS:20090804-165518718
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Abstract
Observations made by the Imaging Science Subsystem (ISS), Visible and Infrared Mapping Spectrometer (VIMS) and the long-wavelength Composite Infrared Spectrometer (CIRS) aboard the Cassini spacecraft reveal that the large, long-lived cyclonic vortex at Saturn's south pole has a 4200-km-diameter cloud-free nearly circular region. This region has a 4 K warm core extending from the troposphere into the stratosphere, concentric cloud walls extending 20–70 km above the internal clouds, and numerous external clouds whose anticyclonic vorticity suggests a convective origin. The rotation speeds of the vortex reach 150 ± 20 ms^-1 . The Saturn polar vortex has features in common with terrestrial hurricanes and with the Venus polar vortex. Neptune and other giant planets may also have strong polar vortices.
| Item Type: | Article | ||||
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| Additional Information: | © 2009 Elsevier B.V. Received 19 September 2008; revised 9 February 2009; accepted 15 February 2009. Available online 26 February 2009. This research was supported by the NASA Cassini Project. | ||||
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| Subject Keywords: | Saturn, atmosphere; Atmospheres, dynamics; Infrared observations; Meteorology; Spectroscopy | ||||
| Record Number: | CaltechAUTHORS:20090804-165518718 | ||||
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:20090804-165518718 | ||||
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| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||
| ID Code: | 14801 | ||||
| Collection: | CaltechAUTHORS | ||||
| Deposited By: | Jason Perez | ||||
| Deposited On: | 06 Aug 2009 21:55 | ||||
| Last Modified: | 26 Dec 2012 11:08 |
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