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SATURN DAILY
Massive storm on Saturn throws water ice high in atmosphere
by Staff Writers
Madison, Wis. (UPI) Sep 3, 2013


disclaimer: image is for illustration purposes only

Water ice dredged up from deep in Saturn's atmosphere by a monster storm marks the first time such ice has been detected so high, U.S. scientists say.

In a paper published in the journal Icarus, researchers say the storm in late 2010 -- as large as any storm ever observed on the planet -- churned up water ice from great depths that was subsequently detected by near-infrared measurements by NASA's Cassini spacecraft.

"The new finding from Cassini shows that Saturn can dredge up material from more than 100 miles," said Kevin Baines, a co-author of the paper who works at the University of Wisconsin-Madison and NASA's Jet Propulsion Laboratory, Pasadena, Calif.

"It demonstrates in a very real sense that typically demure-looking Saturn can be just as explosive or even more so than typically stormy Jupiter."

Water ice, which originates from deep within the atmosphere of gas giant planets, doesn't appear to be lofted as high on Jupiter, the scientists said.

The classic model of Saturn's atmosphere posits a layered sandwich with a deck of water clouds at the bottom, ammonia hydrosulfide clouds in the middle, and ammonia clouds near the top.

But this storm appears to have disrupted those neat layers, the scientists said, lofting up water vapor from a lower layer that condensed and froze as it rose.

The Saturn storm worked like the much smaller convective storms on Earth, where air and water vapor are pushed high into the atmosphere resulting in the towering, billowing clouds of a thunderstorm, the scientists said.

"We think this huge thunderstorm [on Saturn] is driving these cloud particles upward, sort of like a volcano bringing up material from the depths and making it visible from outside the atmosphere," Lawrence Sromovsky, also of the University of Wisconsin, said.

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Related Links
Explore The Ring World of Saturn and her moons
Jupiter and its Moons
The million outer planets of a star called Sol
News Flash at Mercury






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SATURN DAILY
New Cassini data from Titan indicate a rigid, weathered ice shell
Santa Cruz CA (SPX) Sep 03, 2013
An analysis of gravity and topography data from Saturn's largest moon, Titan, has revealed unexpected features of the moon's outer ice shell. The best explanation for the findings, the authors said, is that Titan's ice shell is rigid and that relatively small topographic features on the surface are associated with large roots extending into the underlying ocean. The study is published in the Aug ... read more


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