In 1258, somewhere near the equator, a massive volcano erupted, ultimately lowering global temperatures. According to a study coauthored by Penn State University climatologist Michael Mann, average temperatures in the years after the eruption dropped between 3.6 and 4.5 degrees F, or about half as much as temperatures had dropped at the peak of the last major ice age, between 18,000 and 12,000 years ago. A group of scientists at the Institute of Arctic and Alpine Research in Colorado have identified the chain of events that followed the eruption, which they believe led to the long-term climate change of the Little Ice Age.
Posted on: Sat, 24 Jan 2015 23:28:09 +0000
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