Saturn's South Polar Vortex Compared to Other Large Vortices in the Solar System

Details Saturn's South Polar Vortex Compared to Other Large Vortices in the Solar System Saturn's South Polar Vortex Compared to Other Large Vortices in the Solar System

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p11c1283d&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #P11C-1283

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5704 Atmospheres (0343, 1060), 5754 Polar Regions, 6275 Saturn

Scientific paper

Observations made by the Imaging Science Subsystem (ISS), Visible and In- frared 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 an- ticyclonic vorticity suggests a convective origin. The rotation speeds of the vortex reach 150-190 m/s, and may strengthen with depth. 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.

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