Have a look at this nice peice of work from Nature … corrects a piece of evidence that didn’t quite add up.
ABC/AFP
Carbon dioxide was the big driver that ended the last Ice Age, according to a new study of ice core data from around the world.
About 10,000-20,000 years ago, Earth started to emerge from a quarter million years of deep freeze as the terrestrial ice sheet rolled back and warmer temperatures prevailed.
What caused the end of this age, known as the Pleistocene, has long been debated.
Until now, the main evidence has come from ice cores drilled in Antarctica whose air bubbles are a tiny time capsule of our climate past.
Traces of CO2 in Antarctic ice show that carbon concentrations in the atmosphere rose after temperatures were on the rise.
This timing has been used by sceptics as proof that man-made carbon gases either do not cause global warming or at least do not make it as bad as mainstream scientists say.
But the new study, published in Nature , indicates that the Antarctic record doesn’t reflect global temperature rise. Continue reading →