Thursday, January 24, 2013
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’
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.”
Increasing amounts of carbon dioxide in the atmosphere from sources like vehicle exhaust and industrial pollution — which have risen from about 280 parts per million at the onset of the Industrial Revolution to 391 parts per million today — are helping to raise temperatures on Earth, with no end in sight, said White. Read More