A new study links how many hurricanes form worldwide to air pollution levels
and earlier studies mentioned it as a possibility in increase in Atlantic storms, but Murakami found it a factor around the world and a more direct link.— which is warmed by the air — for fuel and are harmed by wind shear, which changes in upper level winds that can decapitate storm tops. Cleaner air in the Atlantic and dirtier air in the Pacific, from pollution in China and India, mess with both of those, Murakami said.
There are other factors in tropical cyclone activity with La Nina and El Nino — natural fluctuations in equatorial Pacific temperatures that alter climate worldwide — being huge. Human-caused climate change from greenhouse gases, that will grow as aerosol pollution reductions level out, is another, and there other natural long-term climatic oscillations, Murakami said.
In the Pacific, aerosol pollution from Asian nations has gone up 50% from 1980 to 2010 and is starting to drop now. Tropical cyclone formation from 2001 to 2020 is 14% lower than 1980 to 2000, Murakami said.
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