24 Nov '11, 12am

Looking way back at rate of Arctic sea-ice melting: @nature paper by Canadian researchers @nytimesgreen blog

OTTAWA — The current rate of sea ice loss in the Arctic is a change without precedent for 1,450 years, a paper published on Thursday by Nature concludes. Scientists from Canada and the United States reconstructed the Arctic sea ice cover back to the year 561 using a variety of factors including ice core samples, tree ring counts and lake sediment analysis and, where available, ice observation records. The scientists conclude that warmer air temperatures, most likely caused by climate change, are responsible for the decline of the multiyear sea ice at a rate of 8.6 percent a decade and “may soon result in an ice-free Arctic Ocean.” Other periods of Arctic sea ice loss were, by contrast, caused by shifts in the directions of warm ocean currents. The scientists said that both the magnitude and the duration of the current ice melt is without precedent. The authors, who include...

Full article: http://green.blogs.nytimes.com/2011/11/23/looking-way-bac...

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Looking Way Back at the Rate of Arctic Melting

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OTTAWA — The current rate of sea ice loss in the Arctic is a change without precedent for 1,450 years, a paper published o...

Green Blog: Looking Way Back at the Rate of Arc...

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OTTAWA — The current rate of sea ice loss in the Arctic is a change without precedent for 1,450 years, a paper published o...

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