A new study by NASA and Columbia University scientists offers a more reassuring picture of volcanic super-eruption events.
International Space Station photographed the eruption of Mount Etna in Sicily in October 2002. Ashfall was reported more than 350 miles away.look like mere firecrackers. It was 1,000 times stronger than the 1980 Mount St. Helens eruption. The eruption sent a huge plume of ash and gas into the atmosphere, covering much of the globe in a thick layer of debris.But how it impacted Earth’s climate afterward remains a lingering mystery.
“The relatively modest temperature changes we found most compatible with the evidence could explain why no single super-eruption has produced firm evidence of global-scale catastrophe for humans or ecosystems,” said lead author Zachary McGraw, a researcher at NASA GISS and Columbia University. Here’s a video fromPrevious models focused on the immense sulfur dioxide plume released by super-eruptions that condenses into tiny sunlight-blocking particles high in the atmosphere.
Luis Millán, an atmospheric scientist at NASA’s Jet Propulsion Laboratory in Southern California, who was not part of the study, suggested that further research be conducted on the cooling mechanisms of super-eruptions. He believes that a comprehensive analysis of models, as well as additional laboratory and model studies on the factors that influence the size of volcanic aerosol particles, are necessary to move forward.
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