North Pole's largest-ever ozone hole finally closes
By Brandon Specktor - Senior Writer
An unusually strong polar vortex kept the hole open for nearly a month — now, it's finally shut again.
After looming above the Arctic for nearly a month, the single largest ozone hole ever detected over the North Pole has finally closed, researchers from the European Union's Copernicus Atmosphere Monitoring Service (CAMS) reported.
"The unprecedented 2020 Northern Hemisphere ozone hole has come to an end," CAMS researchers tweeted on April 23.
The hole in the ozone layer — a portion of Earth's atmosphere that shields the planet from ultraviolet radiation — first opened over the Arctic in late March when unusual wind conditions trapped frigid air over the North Pole for several weeks in a row.
https://www.livescience.com/arctic-ozone-hole-closes.html
