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Tag: greenlands
Two maps show Greenlands sudden melt season onset
2015-07-08 16:00:00| Climate Ark Climate Change & Global Warming Newsfeed
Climate Central: After a cool spring kept Greenland's massive ice sheet mostly solid, a (comparatively) warm late June and early July have turned half the ice sheet's surface into liquid, well outside the range of normal for this time of year. Despite the ice sheet's remote location, its slushy fingers reach across the globe, influencing sea levels and how fast the Gulf Stream current moves. As temperatures rise, its influence could grow larger as major summer melt events become regular occurrence. Recent warming...
Greenland's Draining Lakes Won't Worsen Sea Level Rise?
2015-06-04 19:04:00| Climate Ark Climate Change & Global Warming Newsfeed
Nature World News: Each summer, Greenland's ice sheet - measuring three times the size of Texas - begins to melt. Pockets of melting ice form hundreds of large, supraglacial lakes on the surface of the ice. Many of these lakes drain through cracks and crevasses in the ice sheet, called moulins, creating a liquid layer over which massive chunks of ice can slide. This natural conveyor belt can speed ice toward the coast, where it eventually falls off into the sea. "It's essentially a check on the inner ice starting...
Mystery of Greenland's 'disappearing lakes' solved
2015-06-04 17:39:00| Climate Ark Climate Change & Global Warming Newsfeed
LiveScience: Geoscientists have solved a decade-long mystery of how some of the large lakes that sit atop the Greenland ice sheet can completely drain billions of gallons of water in a matter of hours. In 2006, Greenland's North Lake, a 2.2 square-mile (5.6 square kilometers) supraglacial meltwater lake, drained almost 12 billion gallons of water in less than two hours. In a study published two years later, researchers determined that this astonishing phenomenon is possible because giant hydro-fractures (water-driven...
Tags: mystery
lakes
solved
disappearing
US researchers uncover secret of Greenland's vanishing lakes
2015-06-04 16:00:00| Climate Ark Climate Change & Global Warming Newsfeed
Reuters: Scientists were baffled last year after meltwater lakes atop Greenland's ice sheet suddenly drained out at rates rivaling Niagara Falls. Now a team of U.S. researchers says it has figured out the bizarre phenomenon and that could help them forecast global sea-level rise. Vertical shafts in the ice sheet, called moulins, can funnel melt water beneath parts of the glacier and lift them up. This causes cracks beneath the so-called supragalcial lakes that can empty them in days, according to scientists...
Tags: secret
researchers
lakes
uncover
Greenlands hidden meltwater lakes store trouble
2015-02-05 12:00:00| Climate Ark Climate Change & Global Warming Newsfeed
Guardian: One small mystery that surrounds Greenlands melting ice is a little closer to being solved as scientists in the US confirm that surface meltwater can drain all the way down to fill concealed lakes under the ice. This means that atmospheric warming can reach thousands of metres below the ice sheet - warming the glacial base and potentially increasing its rate of flow. One group, led by geologist Michael Willis, of Cornell University, and another team led by glaciologist Ian Howat, of Ohio State...
Tags: store
trouble
hidden
lakes
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