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New programme launched to promote Great Lakes Seaway shipping

2015-06-10 01:00:00| Ship Technology

American Great Lakes Ports Association has collaborated with the Lake Carriers' Association, Fednav, and the Saint Lawrence Seaway Development Corporation to launch a new bi-national public affairs programme called the Great Lakes Seaway Partnership.

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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...

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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...

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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...

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Sudden draining of glacial lakes explained

2015-06-03 12:00:00| LifeSciencesWorld

[NEWS] In 2008 scientists from Woods Hole Oceanographic Institution (WHOI) and the University of Washington documented for the first time how the icy bottoms of lakes atop the Greenland Ice Sheet can crack open suddenly—draining the lakes completely within hours and sending torrents of water to the base of the ice sheet thousands of feet below. Now they have found a surprising mechanism that triggers the cracks. Scientists had theorized that the sheer weight of the water in t…

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