"In addition, the results showed that places with more dramatic reductions in atmospheric aerosols tended to also have the greatest reductions in lightning. Southeast Asia, Europe and most of Africa saw some of the greatest reductions both in atmospheric aerosols and lightning, while the Americas had less dramatic changes. Williams said he isn't sure why there was a weaker reduction in aerosol concentration in the Americas, but he pointed out that an increase in aerosol concentration in northern South America could be due to fires."
全球各大區域的差異:
"In addition, the results showed that places with more dramatic reductions in atmospheric aerosols tended to also have the greatest reductions in lightning. Southeast Asia, Europe and most of Africa saw some of the greatest reductions both in atmospheric aerosols and lightning, while the Americas had less dramatic changes. Williams said he isn't sure why there was a weaker reduction in aerosol concentration in the Americas, but he pointed out that an increase in aerosol concentration in northern South America could be due to fires."
https://abcnews.go.com/Technology/lightning-covid-lockdowns/story?id=82143368