US EditionOzone Hole Ranked as 5th Smallest in More than 30 Years, According to New Research
The 2025 ozone hole reached its peak on Sept. 9 at 8.83 million square miles and is breaking up nearly three weeks earlier, reflecting progress under the Montreal Protocol.
- This year, NASA and the National Oceanic and Atmospheric Administration reported the 2025 Antarctic ozone 'hole' ranked as the fifth-smallest since 1992, with a maximum one-day extent of 8.83 million square miles.
- The Montreal Protocol established controls that limit ozone-depleting compounds, and NOAA and NASA scientists emphasize these efforts are driving gradual ozone recovery this year.
- Scientists define the ozone 'hole' as areas below 220 Dobson Units, measured by NOAA balloon measurements and the South Pole Atmospheric Baseline Observatory.
- The 2025 ozone 'hole' is breaking up nearly three weeks earlier than the past decade, with an average extent of about 7.23 million square miles, increasing UV risks for health and agriculture.
- Researchers project the ozone layer will recover later this century, as chlorine and bromine from legacy sources linger in the atmosphere, delaying full recovery, NOAA and NASA say.
13 Articles
13 Articles
Ozone hole shrinks to fifth-smallest since 1992
The ozone hole this year was the fifth-smallest it has been since 1992, thanks to a landmark international agreement to phase out ozone-depleting chemicals. Ozone is a form of oxygen, most prevalent in a thin atmospheric layer starting about 10 miles up. It absorbs harmful UV light and thus protects life. In the 1980s scientists noticed the layer was disappearing, because chlorofluorocarbons (CFCs) found in refrigerants and aerosol cans caused a…
Antarctic Ozone Layer Shows Signs Of Recovery: NASA
The Antarctic ozone layer is showing signs of recovery, reaching an annual maximum of 8.83 million square miles on September 9, scientists from NASA and the National Oceanic and Atmospheric Administration (NOAA) said.
Ozone layer on track for full recovery after UN treaty "success story"
The ozone hole over the Antarctic in 2025 was the fifth smallest since 1992 — "the year a landmark international agreement to phase out ozone-depleting chemicals began to take effect," per a new NOAA-NASA report. Why it matters: While the ozone hole varies in size from year to year, the report…
2025 Ozone Hole Is Among Smallest In Decades, Confirms NASA - The Canadian Media
IBNS-CMEDIA: While continental in scale, the ozone hole over the Antarctic was small in 2025 compared to previous years and remains on track to recover later this century, NASA and the National Oceanic and Atmospheric Administration (NOAA) reported. The hole this year was the fifth smallest since 1992, the year a landmark international agreement to
NASA & NOAA 2025 Ozone Hole Update | Goddard Space Flight Center
NASA & NOAA 2025 Ozone Hole Update | Goddard Space Flight CenterThis year, the ozone hole over Antarctica reached its annual maximum extent on Sept. 9th, 2025, with an area of 8.83 million square miles (22.86 million square kilometers.) The average size of the ozone hole between Sept. 7 and Oct. 13 this year was the 5th-smallest since 1992—when the Montreal Protocol began to take effect.The improvement is due to a combination of continuing decli…
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