Science
September's ozone hole was the biggest in 20 years
The area covered by the Antarctic ozone hole peaked at more than 27 million square kilometers (10.4 million square miles) in September, the second-largest area ever observed for this time of year.
Summary
The area covered by the Antarctic ozone hole peaked at more than 27 million square kilometers (10.4 million square miles) in September, the second-largest area ever observed for this time of year. We first predicted a severe ozone hole in May this year , when we observed changes in atmospheric circulation.
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