NASA’s Cassini Sees Abrupt Turn In Titan’s Atmosphere


Data from NASA’s Cassini spacecraft tie a shift in seasonal sunlight to a wholesale reversal, at unexpected altitudes, in the circulation of the atmosphere of Saturn’s moon Titan. At the south pole, the data show definitive evidence for sinking air where it was upwelling earlier in the mission. So the key to circulation in the atmosphere of Saturn’s moon Titan turned out to be a certain slant of light. The paper was published today in the journal Nature.

“Cassini’s up-close observations are likely the only ones we’ll have in our lifetime of a transition like this in action,” said Nick Teanby, the study’s lead author who is based at the University of Bristol, England, and is a Cassini team associate. “It’s extremely exciting to s
ee such rapid changes on a body that usually changes so slowly and has a ‘year’ that is the equivalent of nearly 30 Earth years.”

In our solar system, only Earth, Venus, Mars and Titan have both a solid surface and a substantial atmosphere – providing natural laboratories for exploring climate processes. “Understanding Titan’s atmosphere gives us clues for understanding our own complex atmosphere,” said Scott Edgington, Cassini deputy project scientist at NASA’s Jet Propulsion Laboratory, Pasadena, Calif. “Some of the complexity in both places arises from the interplay of atmospheric circulation and chemistry.”

Full Story: http://www.jpl.nasa.gov/news/news.php?release=2012-374
Also: http://www.nasa.gov/mission_pages/cassini/whycassini/cassini20121128.html

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  1. December 1, 2012 at 2:22 am

    Reblogged this on Spherical Chickens in a Vacuum.

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