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Antarctic Ozone Hole, September 2002
Photograph - Photograph
Ozone hole. Coloured satellite map of the ozone hole over Antarctica on September 24th, 2002. Atmospheric ozone levels are colour-coded, from red (highest levels) to blue and violet (lowest levels). The unusual bipolar (two-lobed) structure of the hole is due to unusual weather systems in the stratosphere, the atmospheric layer in which most of the ozone is found. The hole is splitting into two smaller holes here. The total volume of the hole is the smallest since 1988, raising hopes that ozone levels may be increasing. The ozone hole is thought to form due to atmospheric pollution. It is at its worst in the late winter and early spring in the southern hemisphere.
May 8th, 2013
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