NASA climate scientist Tom Wagner provides a look at the state of Arctic sea ice in 2009 and discusses NASA's role in monitoring the cryosphere. Learn More: http://www.nasa.gov/topics/earth/features/seaicemin09.html Want more? Subscribe to NASA on iTunes! http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=283424434 Or get tweeted by NASA: http://twitter.com/NASAGoddard
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