Tornado Alley (PROG)

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Ice age study delivers blow to global-warming skeptics

Changed patterns of deep sea circulation resulted in less sea ice around Antarctica at the end of the last ice age, part of a broader process that led to an influx of carbon dioxide in the atmosphere. This photo shows Antarctic sea ice today.
A new study finds that rising levels of carbon dioxide drove rising temperatures at the end of the last ice age. The findings contrast with previous studies, which skeptics of human-triggered global warming said showed that CO2 levels weren't an important factor.
April 5, 2012
http://www.csmonitor.com/Environment/2012/0405/Ice-age-study-delivers-blow-to-global-warming-skeptics [with comments]

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CO2 'drove end to last ice age'

Ice core records from Antarctica had suggested the CO2 increase lagged behind temperature rise
A new, detailed record of past climate change provides compelling evidence that the last ice age was ended by a rise in temperature driven by an increase in atmospheric carbon dioxide.
4 April 2012
http://www.bbc.co.uk/news/science-environment-17611404