# science northpole polarvortex ozone copernicusatmosphere atmosphere ozoneday

largest-ever finally closes — good news at last...
► https://t.co/hbVXv1obrF via

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2020-04-29

The unprecedented 2020 northern hemisphere has come to an end. The split, allowing air into the Arctic, closely matching last week's forecast from the Monitoring Service.

More on the NH Ozone hole➡️https://t.co/Nf6AfjaYRi

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2020-04-23

The Monitoring Service is celebrating World by staying on duty tracking 2019's oddball

This animation compares it to every year since 1979, showing the variation over time.

Full update➡️ https://t.co/x8j0ldxfkw

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2019-09-16