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Climate Record From Bottom of Russian Lake Shows Arctic Was Warmer Millions of Years Ago

Posted May 09 2013 2:53pm

drilling rig at night The Arctic was very warm during a period roughly 3.5 to 2 million years ago--a time when research suggests that the level of carbon dioxide in the atmosphere was roughly comparable to today's--leading to the conclusion that relatively small fluctuations in carbon dioxide levels can have a major influence on Arctic climate, according to a new analysis of the longest terrestrial sediment core ever collected in the Arctic.

"One of our major findings is that the Arctic was very warm in the ...

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This is an NSF News item.

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