Arctic ‘warmest in 2,000 years’

September 5, 2009 at 10:08 pm | Posted in Lifescape | Leave a comment
clipped from news.bbc.co.uk

Lake

Arctic temperatures are now higher than at any time in the last 2,000 years, research reveals.

Changes to the Earth’s orbit drove centuries of cooling, but temperatures rose fast in the last 100 years as human greenhouse gas emissions rose.

Scientists took evidence from ice cores, tree rings and lake sediments.

Writing in the journal Science, they say this confirms that the Arctic is very sensitive both to changes in solar heating and to greenhouse warming.

The 23 sites sampled were good enough to provide a decade-by-decade picture of temperatures across the region.

Graph
“The 20th Century stands out in strong contrast to the cooling that should have continued. The last half-century was the warmest of the 2,000-year temperature record, and the last 10 years have been especially dramatic,”
“Scientists have been accused for years of scaremongering. But the real scaremongers are those who say we cannot afford climate action,”

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