Undersea volcano eruption in Tonga was a “once-in-a-lifetime event” that could warm Earth’s surface, scientists say

An undersea volcano erupted in Tonga in January raised the amount of water in the stratosphere by around 5%. The eruption dwarfed the power of the Hiroshima atomic bomb. Scientists are trying to figure out how all that water could affect the atmosphere, and whether it might warm Earth’s surface over the next few years. The extra water might also speed up ozone loss in the atmosphere. It’s unclear just how much warming could be in store, because they’ve never seen an eruption like this one.

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