Scientists watch polar areas for changes
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Are we really heading for an ice-free Arctic? More than 50,000 researchers hope to find an answer during a massive study of how global warming and other phenomena are changing the coldest parts of the Earth &#151; and what that means for the rest of it.
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More than 60 nations started the biggest scientific investigation of the Arctic and Antarctic on Thursday amid new evidence that global warming is thawing polar ice and raising sea levels.
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A large network of waterways helps carry ice from the center of Antarctica to the ocean, scientists say, in a finding that may help clarify how global warming will affect the world's sea levels.
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The largest polar research programme for half a century, lasting two years,  is launched on Thursday.
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Just as explorers once searched the vast reaches of Africa's Nile River for clues to its behavior and ultimate source, modern-day scientists are searching Antarctica for its hidden lakes and waterways that can barely be detected at the surface of the ice sheet.
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A Nasa satellite records major changes to ice coverage in the Arctic Ocean between 2004 and 2005.
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Scientists were watching on Monday for a collision between a giant iceberg and an Antarctic glacier, which could free up sea lanes to America's McMurdo Station and help penguins reach crucial feeding areas.
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An ambitious two-year effort aims to understand the vital, shifting dynamics of ice, oceans and life at the ends of the earth.
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A team of explorers will head to the Arctic this winter to measure the thickness of the ever shrinking sea ice.
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Description: New evidence is reported that rising global temperatures could have rapid effects on the Antarctic ice pack and on ocean levels.
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Ice is sliding off the Antarctic continent much faster than it did during the 1990s, several teams of researchers have found. On the Antarctic Peninsula that sticks out from the western side of the continent
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To witness the impact of a warming planet, one need not make a costly trip to the melting Arctic ice cap. Proof of climate change is right there in most people's backyards, scientists said on Tuesday.
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The ice-cloaked Arctic Ocean was once apparently a warm, biologically brewing basin, scientists say.
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NASA, Canadian, and European satellites have observed worrying increases in the flow of glaciers into the open ocean, following the breakup of ice shelves in Antarctica.
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The Arctic is under increasing stress from warming temperatures as shrubs colonize the tundra, changing wildlife habitat and local climate conditions, researchers said Wednesday.
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Scientists from the US reconstruct a 40,000-year record of climate change at the South Pole.
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Glaciers are melting faster than before in some regions from the Arctic to the Alps but others are getting bigger, scientists said on Friday.