Ozone hits a new low

Scientists discover a major thinning in the protective atmosphere over Arctic

By Stephen Ornes, 15:47 PM October 19, 2011





Scientists saw something missing in the skies over the North Pole this spring. And it wasn’t Santa or his reindeer. It was ozone — an invisible gas that protects Earth and everything on it from the sun’s harmful ultraviolet rays.


The thickest layer of ozone is found high up in the stratosphere. The thickness of the ozone layer changes throughout the year. Sometimes there’s more; sometimes there's less. Scientists say that in the spring of 2011, there was less ozone high above the Arctic tha...

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