Younger Dryas caused by a volcano after all

One of the most abrupt climate change events in human existence was the Younger Dryas period about 13,000 years ago, and even though it was so sharp, and so severe, and so recent (geologically speaking) we still don’t know what caused it. A new paper argues that it is likely it was a volcano. But previously researchers have said “asteroid”.

The Earth was warming out of the last ice age, when it suddenly cooled, and stayed cold for twelve centuries, then warmed again, just as abruptly. This is what real climate change looks like, something we mere mortals are unprepared for and apparently have no way of predicting.

Spare a thought for the people alive at the time. They were subject to a fall of three degrees Celsius, apparently in the space of just one year, perhaps triggered by volcanic dust that darkened the sky.  What is still far from explained, whether it was by volcano or falling rock, was why the coldness continued so long then so suddenly ended. The snap  change wiped out some species, like possibly the last mammoths, and in some locations camels and horses.

The volcanic dust is thought to have fallen out within a […]

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via JoNova

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August 10, 2020 at 01:38AM

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