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New ice core data from Greenland offers chilling clues about the direction of Earth’s climate

‘Our kids and grandkids are definitely going to look back and shake their heads at the inaction of this country’s generation’

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For several days in July 2012, the surface of the Greenland ice sheet melted over a larger area than at any time in more than 30 years of satellite observations. An estimated 97 percent of the ice sheet surface had thawed by July 12, with satellite data providing a picture of an extreme melt event about which scientists are very confident. Graphic courtest Nicolo E. DiGirolamo, SSAI/NASA GSFC, and Jesse Allen, NASA Earth Observatory.

By Summit Voice

FRISCO — Last summer’s unusual melting at the surface of Greenland’s ice cap has a historic precedent, but you have to go back more than 100,000 years, to an extremely warm interglacial period of Earth’s history, to find it, according to an international science team’s  analysis of ice core samples spanning millennia of climate history.

The new study, published this week in Nature, offers clues about where the planet is headed in terms of increasing greenhouse gases and rising temperatures, according to CU-Boulder ice core expert Jim White — another researcher whose detailed knowledge of climate science has led him to advocate for reductions in greenhouse gas emissions.

“Unfortunately, we have reached a point where there is so much carbon dioxide in the atmosphere it’s going to be difficult for us to further limit our impact on the planet,” White said. “Our kids and grandkids are definitely going to look back and shake their heads at the inaction of this country’s generation. We are burning the lion’s share of oil and natural gas to benefit our lifestyle, and punting the responsibility for it.” Continue reading

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