Uncharted Islands Appear Around Greenland

Increasing global temperatures are not simply melting glaciers; they are changing the very geography of coastlines of Greenland and the Arctic. Nunataks -- "lonely mountains" in Inuit -- that were encased in Greenland's ice sheet are being freed of their age-old bonds, exposing a new chain of islands, and a new opportunity for Arctic explorers to write their names on the landscape. But the sudden appearance of islands is a symptom of an ice sheet going into retreat, scientists say.

"The general thinking until very recently was that ice sheets don't react very quickly to climate," said Martin Truffer, a glaciologist at the University of Alaska at Fairbanks. "But that thinking is changing right now, because we're seeing things that people have thought are impossible."

Greenland is covered by 630,000 cubic miles of ice -- enough water to raise global sea levels by 23 feet.

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