Covid lockdowns lessened global lightning activity

American Geophysical Union

Lightning reduction during COVID-19 period detected by the World Wide Lightning Location Network (WWLLN). The months March through May are bracketed with colored lines for the years 2018, 2019 and 2020.

Credit: Yakun Liu

The effect of lightning over the ocean is especially telling, said Liu, because the ocean is flat and less variable in temperature, and so less likely to influence how thunderclouds form or behave. That allows the effects of aerosols to shine through.

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