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Images: NASA says ozone layer is healing

By Bill Detwiler August 31, 2006, 1:15 AM PDT Bill Detwiler on Twitter billdetwiler

Image
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Ozone hole
Ozone hole
Images: NASA says ozone layer is healing

NASA/NOAA

Studies by NASA and the National Oceanic and Atmospheric Administration (NOAA) confirm that the Earth’s ozone layer is mending. rn

The layer of ozone which lies mainly in the Earth’s stratosphere protects humans from harmful rays of the sun. The amount of ozone in the atmosphere steadily decreased from 1979 to 1997 when it began to level off. Researchers have no doubt that the increase in ozone is because nations followed the 1987 Montreal Protocol on the Substances that Deplete the Ozone. The Montreal Protocols phased out many halogenated hydrocarbons that had played a role in ozone depletion.rn

The image on the left displays the largest hole in the ozone layer over Antactica on Sept. 10, 2000. Right is the ozone hole on Aug. 27, 2006. It can be tracked daily on the Ozone Hole Watch.

NASA/NOAA
Images: NASA says ozone layer is healing

The chart shows NASA/NOAA satellite data comparing stratospheric chlorine and the thickness of the ozone layer. As stratospheric chlorine declined in response to the Montreal Protocol, the amount of stratospheric chlorine began to decline while the ozone layer began to recover.

Images: NASA says ozone layer is healing

During the first stages of ozone recovery, the ozone hole over Antarctica splits into two.

Images: NASA says ozone layer is healing

The maps show how ozone dissipated from the Earth’s atmosphere from 1981 to its lowest levels in 1999.

Images: NASA says ozone layer is healing

NASA researchers recently confirmed that “long waves,” or bands of atmospheric energy that circle the Earth, regulate the temperature in the atmosphere over the Artic, and control ozone loss in the stratosphere.

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By Bill Detwiler
Bill Detwiler is the Editor for Technical Content and Ecosystem at Celonis. He is the former Editor in Chief of TechRepublic and previous host of TechRepublic's Dynamic Developer podcast and Cracking Open, CNET and TechRepublic's popular online show.
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