The asynchronous relationship between millennial-scale temperature changes over Greenland and Antarctica during the last glacial period has led to the notion of a bipolar seesaw which acts to redistribute heat depending on the state of meridional overturning circulation within the Atlantic Ocean.

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Sailors, fishermen and cruise passengers should be on the alert. If anybody spots a yellow rubber duck bobbing on the ocean waves, NASA would like to know.

WASHINGTON: More than two trillion tonnes of land ice in Greenland, Antarctica and Alaska have melted since 2003, according to new NASA satellite data that show the latest signs of what scientists say is global warming.

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ScienceDaily

Reconstructions of ancient atmospheric carbon dioxide (CO2) variations help us better understand how the global carbon cycle and climate are linked. We compared CO2 variations on millennial time scales between 20,000 and 90,000 years ago with an Antarctic temperature proxy and records of abrupt climate change in the Northern Hemisphere.

Two new studies point to random, wind-induced circulation changes in the ocean--not global warming--as the dominant cause of the recent ice losses through the glaciers draining both the Greenland and West Antarctic ice sheets.

By Deborah Zabarenko, Environment Correspondent

WASHINGTON (Reuters) - To help figure out what's happening inside the fastest-moving Greenland glacier, a U.S. rocket scientist sent 90 rubber ducks into the ice, hoping someone finds them if they emerge in Baffin Bay.

How fast will our coastlines be swallowed up by rising sea levels?

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