Monday, March 27, 2006

Glacial earthquakes rock Greenland

New Scientist reports that change is coming rapidly to Greenland: Glacial earthquakes rock Greenland ice sheet

A rapid increase in “glacial earthquakes” – caused by sudden large movements of glaciers – over the past few years indicates that warmer temperatures will destroy the Greenland ice sheet faster than expected, a new study warns.
What I want to know is, if enough landlocked polar ice melts to raise the sea level — even a little bit — does that mean that ice shelves floating above ocean waters will calve immediately? And does that trigger yet more glacial movement and melting? All the news reports talk about the seas rising 20 feet in 100 years. I want to see some near term scenarios and some insights into the progression of these changes.

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