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Ozone Hole - Antarctica
Persistent cold temperatures and strong circumpolar winds, also known as the polar vortex, supported the formation of a large and deep Antarctic ozone hole that should persist into November, NOAA and NASA scientists reported today.
The annual Antarctic ozone hole reached its peak size at about 24,8-million square kilometres (9,6-million square miles), roughly three times the area of the continental US, on 20 September. Observations revealed the nearly complete elimination of ozone in a 4-mile-high column of the stratosphere over the South Pole.