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Antarctic ozone hole unusually large despite healing trend
Original: The ozone layer was supposed to be healing. So why is this year's Antarctic ozone hole so big?
Scientists are examining why this year's Antarctic ozone hole is unusually large, even though the ozone layer has been recovering since the Montreal Protocol phased out ozone-depleting chemicals. Possible explanations include colder-than-usual polar stratospheric temperatures, atmospheric dynamics and volcanic aerosols, which can widen the annual hole without reversing the long-term recovery trend.
Why now: The size of this year's hole challenges public expectations that the ozone layer is steadily recovering.
Antarcticaozone layerMontreal Protocol
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Evidence
- The ozone layer was supposed to be healing. So why is this year's Antarctic ozone hole so big? · livescience.com
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