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NASA reveals new results from inside the ozone hole
Date:12/11/2013

tions in the two factors that control ozone: the winds that bring ozone to the Antarctic and the chemical loss due to chlorine.

Until chlorine levels in the lower stratosphere decline below the early 1990s level expected sometime after 2015 but likely by 2030 temperature and winds will continue to dictate the variable area of the hole in any given year. Not until after the mid 2030s will the decline stratospheric chlorine be the primary factor in the decline of ozone hole area.

"We are still in the period where small changes in chlorine do not affect the area of the ozone hole, which is why it's too soon to say the ozone hole is recovering," Strahan said. "We're going into a period of large variability and there will be bumps in the road before we can identify a clear recovery."


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Contact: Kathryn Hansen
Kathryn.h.hansen@nasa.gov
301-286-1046
NASA/Goddard Space Flight Center
Source:Eurekalert  

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