Giant Cyclones Seen on Saturn

By SPACE.com Staff

posted: 13 October 2008
02:31 pm ET
Scientists have discovered a giant cyclone swirling on Saturn's north pole, and observed a similar storm on the planet's south pole in detail 10 times greater than before, thanks to new images from NASA's Cassini spacecraft.

The new images, taken in infrared light, reveal for the first time a massive cyclone churning at the north pole, similar to a gigantic storm on Saturn's south pole.

"These are truly massive cyclones, hundreds of times stronger than the most giant hurricanes on Earth," said Kevin Baines, Cassini scientist on the visual and infrared mapping spectrometer at NASA's Jet Propulsion Laboratory in Pasadena, Calif. "Dozens of puffy, convectively formed cumulus clouds swirl around both poles, betraying the presence of giant thunderstorms lurking beneath. Thunderstorms are the likely engine for these giant weather systems."

Researchers think the storms are powered by heat released from condensing water in thunderstorms deep down in the atmosphere, similar to the way condensing water in clouds on Earth powers hurricane vortices.

But unlike Earth's hurricanes, which stem from the ocean's heat and water, Saturn's cyclones have no body of water at their bases. The storms on that planet are locked to Saturn's poles, whereas terrestrial hurricanes drift across the ocean.

more:

http://www.space.com/scienceastronomy/081013-cassini-storms.html

http://www.nasa.gov/mission_pages/cassini/media/cassini-20081013.html


This detailed Cassini view of the monstrous vortex at Saturn's south pole provides valuable insight about the mechanisms that power the planet's atmosphere.

This view is 10 times more detailed than any previous image of the polar vortex. See PIA11103 for a more oblique, wide-angle view that provides context for this close-up.

Movie:
http://www.nasa.gov/mission_pages/cassini/multimedia/pia11215.html