Ozone hole not yet recovering


  • Sarah Zielinski


The depletion of ozone in the stratosphere caused by chemicals such as chlorofluorocarbons (CFCs)—and the resulting annual hole in the ozone layer over Antarctica—is not getting any worse, although recovery has not yet begun, according to two of the scientists who discovered the cause of the ozone hole 20 years ago.

“If you look at the ozone records all over the world…the data indicates that the reduction in ozone has stopped,” said David Hofmann, director of the Global Monitoring Division of the U.S. National Oceanic and Atmospheric Administration's (NOAA) Earth System Research Laboratory (ESRL). He and ESRL senior scientist Susan Solomon spoke at a 22 August briefing in Washington, D.C.