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Our Ozone Layer is Recovering

Ozone hole.Contrary to what most might believe, our ozone layer is actually in the process of healing itself. Here's a recent announcement from NASA:

A team led by Eun-Su Yang of the Georgia Institute of Technology, Atlanta, analyzed 25 years of independent ozone observations at different altitudes in Earth's stratosphere, which lies between six and 31 miles above the surface. The observations were gathered from balloons, ground-based instruments, NASA and NOAA satellites.

The stratosphere is Earth's second lowest atmospheric layer. It contains approximately 90 percent of all atmospheric ozone. The researchers concluded the Earth's protective ozone layer outside of the polar regions stopped thinning around 1997. Ozone in these areas declined steadily from 1979 to 1997.

"These results confirm the Montreal Protocol and its amendments have succeeded in stopping the loss of ozone in the stratosphere," Yang said. "At the current recovery rate, the atmospheric modeling community's best estimates predict the global ozone layer could be restored to 1980 levels — the time that scientists first noticed the harmful effects human activities were having on atmospheric ozone — some time in the middle of this century."

Link & Image: NASA
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