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Fred Johnson

Ozone Hole 1990

Ozone Hole Area Minimum Ozone (million km2) (DU) Maximum Daily Minimum Daily Year Date Value Date Value 1990 19 September  21.1  05 October 111 http://ozonewatch.gsfc.nasa.gov The 1990 Antarctic Ozone Hole as observed by TOMS The 1990 Antarctic ozone hole matched the record 1987 ozone hole in depth, duration, and area. During the formation phase of …

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The Ozone Hole 2001

Ozone Hole Area Minimum Ozone (million km2) (DU) Maximum Daily Minimum Daily Year Date Value Date Value 2001 17 September  26.5  22 September 91 http://ozonewatch.gsfc.nasa.gov British Antarctic Survey summary-In 2001 the ozone hole reached an area of over 25 million square kilometres at its maximum in September, and lasted until the summer solstice. Once the …

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The Ozone Hole 2000

Ozone Hole Area Minimum Ozone (million km2) (DU) Maximum Daily Minimum Daily Year Date Value Date Value 2000 09 September  29.9  29 September 89 http://ozonewatch.gsfc.nasa.gov     British Antarctic Survey summary-The 2000 ozone hole reached its greatest extent in early September at 28.4 million square kilometres and was the largest ever-recorded ozone hole. It reached …

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