Narcreoous-Clouds

By Jack Williams

Nacreous clouds approximatel7 80,000 feet above the McMurdo Station in Antarctica as the sun is beginning to come up for the summer. These clouds are an important factor in formation of the ozone hole. Photo by Zenobia Evans, National Science Foundation.

Nacreous clouds near the McMurdo Station in Antarctica. The clouds, approximately 80,000 feet up are the highest of all clouds in a region where tempertuers are minus 100 or colder Fahrenheit. They are the polar stratoipheric clouds that contribute to the formation of the Antarctic ozone hole.

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