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NASA pinpoints causes of 2011 Arctic ozone hole
Date:3/11/2013

ospheric conditions that blocked ozone resupply.

Once the vortex broke down and transport from the tropics resumed, the ozone concentrations rose quickly and reached normal levels in April 2011.

Strahan, who now wants to use the GMI model to study the behavior of the ozone layer at both poles during the past three decades, doesn't think it's likely there will be frequent large ozone losses in the Arctic in the future.

"It was meteorologically a very unusual year, and similar conditions might not happen again for 30 years," Strahan said. "Also, chlorine levels are going down in the atmosphere because we've stopped producing a lot of CFCs as a result of the Montreal Protocol. If 30 years from now we had the same meteorological conditions again, there would actually be less chlorine in the atmosphere, so the ozone depletion probably wouldn't be as severe."


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Contact: Maria-Jose Vinas
maria-jose.vinasgarcia@nasa.gov
301-614-5883
NASA/Goddard Space Flight Center
Source:Eurekalert  

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