Cleaner air in the United States and Europe is brewing more Atlantic hurricanes, a U.S. government study found.
Cleaner air in the United States and Europe is brewing more Atlantic hurricanes, a new U.S. government study found.
Scientists had long known that aerosol pollution cools the air, at times reducing the larger effects of greenhouse gases from the burning of fossil fuel, and earlier studies mentioned it as a possibility in the increase in Atlantic storms, but Murakami found it a factor around the world and a more direct link.
"That's why the Atlantic has gone pretty much crazy since the mid-'90s and why it was so quiet in the '70s and '80s," said climate and hurricane scientist Jim Kossin of the risk firm The Climate Service. He wasn't part of the study but said it makes sense. The aerosol pollution"gave a lot of people in the '70s and '80s a break, but we're all paying for it now.
While aerosol cooling is maybe half to one-third smaller than the warming from greenhouse gases, it is about twice as effective in reducing tropical cyclone intensity compared to warming increasing it, said Columbia University climate scientist Adam Sobel, who wasn't part of the study. As aerosol pollution stays at low levels in the Atlantic and greenhouse gas emissions grow, climate change's impact on storms will increase in the future and become more prominent, Murakami said.
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