The hole in the ozone layer has opened unusually early this year
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The hole in the ozone layer has opened unusually early this year

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Average ozone measurements over the southern hemisphere during 1-10 August

NASA/Goddard Earth Observing System

The ozone hole over Antarctica has opened weeks earlier than usual and could grow to near-record size due to delayed effects of the massive Hunga Tonga-Hunga Ha’apai volcanic eruption last year.

The hole in the ozone layer has been gradually healing since the 1987 Montreal Protocol led to the phase-out of ozone-depleting chemicals like chlorofluorocarbons (CFCs), but it opens and closes seasonally every year.

In recent years, the hole has started to open in mid-to-late August, when spring begins in the …

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