‘The natural carbon cycle can change a lot faster than we thought’
FRISCO — One of the most detailed ice cores samples ever taken from Antarctica shows three sharp spikes of atmospheric carbon dioxide ushering in the end of the ice age about 10,000 years ago.
Based on the findings, the researchers said that the increase in atmospheric CO2 from the peak of the last ice age to complete deglaciation was about 80 parts per million, taking place over 10,000 years, with about half that increase occurring in just a few centuries.
They’re not sure what caused the sudden surges, but suspect it was a combination of factors, including ocean circulation, changing wind patterns, and terrestrial processes. But understanding the mechanisms that caused the changes would help determine what take the Earth in and out of ice age regimes. Continue reading