Old Arctic Ice Melting Away
Formations older than 1 year see heavy declines
By Nick McMaster,  Newser Staff
Posted Mar 18, 2008 7:22 PM CDT
This May 18, 2006 photo provided by the U.S. Fish and Wildlife Service, shows walrus on an ice flow in the northern Bering Sea off of Alaska.    (AP Photo/U.S. Fish and Wildlife, Liz Labunski)
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(Newser) – The Arctic's oldest, thickest ice is melting and may undermine the entire Arctic ice cap, NASA satellite photos show. Some 965,300 square miles of perennial ice, more than a year old, has melted over the past year—a 50% decrease. Losses of older, hardier frost are even greater: Three quarters of ice more than 6 years old has melted in the past 12 months.

"It's like looking at a Hollywood set," one scientist said. "It may look OK but if you could see behind you'd see it's just empty." A melted Arctic would not raise sea levels, but can increase global warming by replacing reflective ice with dark water—which absorbs more sunlight, Reuters reports.