Greenland ice melt: rare, but regularly scheduled - DotEarth

NASA reported this week that Greenland’s surface ice is undergoing a major melt event this summer. Such an event is rare — the last wide surface melt was in 1889. DotEarth’s Andy Revkin discusses this phenomenon and the press surrounding the story; a video with ESS‘ Bob Hawley is included. 

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Climate feedback estimates are narrowed, faster than thought - Phys.org

In a paper published in the journal Climate of the Past, the researchers use Antarctic and Greenland ice cores to examine the time lag between changes in temperature and in atmospheric carbon dioxide levels in the past. Their findings suggest that feedbacks in the climate system – in which warming is linked to natural carbon dioxide increase, driving further warming – may operate faster than previously thought. 

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