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Ozone hole stabilised
26/Aug/2006: After last season's bumper ozone hole, this year things look set to be much less dramatic, and scientists even say the hole may have stopped widening.
At a conference in Washington, two of the scientists who first raised the alarm about the hole in the protective atmospheric layer said they were hopeful the hole would heal within 60 years.
The Ozone layer, for anyone who might have missed it, is a protective layer of the atmosphere which absorbs much of the harmful UV from the sun's rays.
Its composition does fluctuate naturally during the year, becoming thicker in the summer months and thinner during the winter.
During the southern hemisphere winter the polar vortex keeps the atmospheric mass above the Antarctic continent isolated from exchanges with mid-latitude air.
This keeps the air mass above the continent cold, and in the cold and dark, clouds that contain chlorine can form in the polar stratosphere & this chlorine, much of it originating from man-made pollutants like chlorofluorocarbons, disrupts the ozone layer.
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