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environment general science genetics health and medicine space technology May 25, 2003 
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Dawn of a new ozone hole
September 24, 2001
new ozone hole, 2001

In a few days spring will replace winter across our planet’s southern hemisphere. At the South Pole itself the sun will peek above the horizon for the first time in months. With the sun comes a less popular springtime event—the return of the ozone hole. Last-year’s ozone hole was a record-setter: It grew to be three times larger in area than the entire land mass of the United States. The hole was so far-reaching it exposed towns in southern Chile and Argentina to elevated levels of ultraviolet sunlight. This year’s hole has been opening since mid-August, and it appears to be another big one.

image: NASA

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