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Active Volcano Discovered Under Antarctic Ice Sheet
2013-11-17 17:26:00| Climate Ark Climate Change & Global Warming Newsfeed
LiveScience: Earthquakes deep below West Antarctica reveal an active volcano hidden beneath the massive ice sheet, researchers said today (Nov. 17) in a study published in the journal Nature Geoscience. The discovery finally confirms long-held suspicions of volcanic activity concealed by the vast West Antarctic Ice Sheet. Several volcanoes poke up along the Antarctic coast and its offshore islands, such as Mount Erebus, but this is the first time anyone has caught magma in action far from the coast. "This...
Tags: active
ice
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discovered
Changing winds dampen Antarctic sea-level rise
2013-11-16 15:00:00| Climate Ark Climate Change & Global Warming Newsfeed
Nature: Shifting, strengthening winds will help to counteract future sea-level rise in Antarctica -- and by doing so, they may help stabilize ice sheets on some parts of the southern continent. The band of westerly winds that encircles Antarctica has been speeding up and creeping southward since the 1950s. The trend, largely driven by the Antarctic ozone hole, is expected to continue thanks to climate change -- and could alone cause a drop in sea level of up to 40 cm over 70 years, according to research...
Tags: changing
rise
winds
antarctic
Massive Antarctic iceberg sets sail
2013-11-13 22:00:00| Climate Ark Climate Change & Global Warming Newsfeed
LiveScience: After lingering in its birthing bay for nearly six months, an Antarctic iceberg the size of Singapore is finally heading out to sea. Strong winds blowing off the continent are pushing the giant floe away from its parent, the giant Pine Island Glacier, and the warming Southern Hemisphere's has melted the thick winter sea ice that held the block in place since July, said Grant Bigg, an ocean modeler at the University of Sheffield in the United Kingdom. The latest satellite images show several kilometers...
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Giant Antarctic iceberg could pose hazard to shipping lanes, scientists warn
2013-11-13 14:45:00| Climate Ark Climate Change & Global Warming Newsfeed
Independent: A giant Antarctic iceberg has broken free of the continent and could be about to drift into busy international shipping lanes, a team of British scientists has warned. The Government has awarded experts with an emergency grant of 50,000 to fund a six-month project in which they will try to track the progress of the ice and predict its movements. The University of Sheffields Professor Grant Bigg, a leading authority on modelling the dynamics of icebergs, is heading up the investigation that...
Tags: shipping
giant
pose
scientists
Antarctic Researchers Discover Strips of Rock That Slow the Flow of Glaciers
2013-11-08 21:01:00| Climate Ark Climate Change & Global Warming Newsfeed
Yale Environment 360: Narrow ribs of dirt and rock beneath Antarctic glaciers help slow the glaciers' flow into the sea, according to new research from scientists at Princeton University and the British Antarctic Survey. Using satellite measurements of the Pine Island Glacier and Thwaites Glacier, both in West Antarctica, researchers discovered bands they call "tiger stripes" underlying the glaciers. The stripes serve as zones of friction and prevent sliding, much like non-slip flooring, the researchers report in Science....
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