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Largest Arctic Ozone hole has now closed – CAMS

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Scientists monitoring the “unprecedented” hole at the Copernicus Atmospheric Monitoring Service (CAMS) announced the closure of the largest Arctic ozone hole ever recorded.

Ozone columns over large parts of the Arctic have reached record-breaking low values this year, and the ozone layer over the Arctic is severely depleted at altitudes of around 18 km. The last time similarly strong chemical ozone depletion was observed over the Arctic was during spring 2011, and ozone depletion in 2020 seems on course to be even stronger.

The Copernicus Atmosphere Monitoring Service (CAMS*) has been closely following the rather unusual ozone hole that has formed over the Arctic this spring.

Researchers said the pandemic likely was not the reason for the ozone hole closing.

“Actually, COVID19 and the associated lockdowns probably had nothing to do with this,” CAMS tweeted Sunday. “It’s been driven by an unusually strong and long-lived polar vortex, and isn’t related to air quality changes.”

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