Hunga-Tonga eruption likely contributed to this year's ozone depletion
means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites..Correction: The original version of this story misstated the ranking of the 2023 ozone hole. It was the 12th largest single-day hole on record, and the 16th largest when averaged from September 7 to October 13.
The ozone layer acts like Earth’s natural sunscreen, as this portion of the stratosphere shields our planet from the sun’s harmful ultraviolet radiation. A thinning ozone layer means less protection from UV rays, which can cause sunburns, cataracts and skin cancer in humans. “Although the total column ozone is never zero, in most years, we will typically see zero ozone at some altitudes within the stratosphere over the South Pole,” said NOAA Research Chemist Bryan Johnson, project leader for the Global Monitoring Laboratory’s ozonesonde group. “This year, we observed about 95% depletion where we often see near 100% loss of ozone within the stratosphere.”
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