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The Ozone Hole Is the Largest It's Been in a Decade
Gizmodo • • world
Key Points:
- The ozone hole over the South Pole has reached its largest size in a decade, spanning 10.5 million square miles on September 18, nearly three times the size of the United States, due to an unusually strong polar vortex.
- The powerful polar vortex maintained cold conditions and polar stratospheric clouds necessary for ozone depletion, while weak planetary-scale weather systems failed to break it up as usual.
- Despite this year's large ozone hole, scientists emphasize that the ozone layer is still on track to recover by the end of the century, thanks to international efforts like the Montreal Protocol that have significantly reduced ozone-depleting substances.
- Ongoing monitoring by NASA and NOAA using satellites, balloons, and ground instruments confirms that chlorine levels have declined by about a third since the 1980s, supporting the continued healing of the ozone layer.
- This year's anomaly highlights that ozone recovery is not linear and underscores the importance of maintaining efforts to phase out harmful chemicals to ensure long-term ozone layer restoration.
