{"id":26003,"date":"2026-01-24T06:30:00","date_gmt":"2026-01-24T11:30:00","guid":{"rendered":"https:\/\/www.ecoticias.com\/en\/?p=26003"},"modified":"2026-01-23T07:41:12","modified_gmt":"2026-01-23T12:41:12","slug":"the-ozone-hole-over-antarctica-closed-unusually-early-in-2025-and-scientists-believe-there-is-a-reason-that-almost-no-one-is-looking-at","status":"publish","type":"post","link":"https:\/\/www.ecoticias.com\/en\/the-ozone-hole-over-antarctica-closed-unusually-early-in-2025-and-scientists-believe-there-is-a-reason-that-almost-no-one-is-looking-at\/26003\/","title":{"rendered":"The ozone hole over Antarctica closed unusually early in 2025, and scientists believe there is a reason that almost no one is looking at"},"content":{"rendered":"\n

For once, there is climate news that feels like a breath of fresh air. Scientists report that the 2025 Antarctic ozone hole<\/a> was the smallest and shortest\u2011lived in five years and it closed earlier than usual, a sign that the damaged shield high above our heads<\/a> is slowly healing.<\/p>\n\n\n\n

Data from the Copernicus Atmosphere Monitoring Service<\/a> show that the hole closed on December 1, the earliest closure since 2019, after reaching a maximum area of about 21 million square kilometers in early September, clearly below the 26.1 million measured in 2023. For the second year in a row, the average size and duration were smaller than the very large, long-lasting holes seen between 2020 and 2023, and ozone concentrations inside the hole were higher than in those previous years.<\/p>\n\n\n\n

On top of that, a joint assessment from NOAA and NASA<\/a> ranks the 2025 hole as the fifth smallest since 1992, the year when the Montreal Protocol<\/a> really started to bite into emissions of ozone\u2011depleting chemicals.<\/p>\n\n\n\n

So what exactly is closing up above Antarctica, and why does it matter to someone putting on sunscreen before a summer walk?<\/p>\n\n\n\n

The ozone layer and our daily lives<\/h2>\n\n\n\n

The ozone layer<\/a> sits between roughly 15 and 35 kilometers above Earth and absorbs most of the Sun\u2019s harmful ultraviolet radiation<\/a>. Without this thin shield, skin cancer rates would soar<\/a>, crops and marine plankton would be damaged and even outdoor time in the middle of the day could become risky in many regions.<\/p>\n\n\n\n

The so\u2011called ozone hole<\/a> is not a literal gap. It is a seasonal thinning of ozone high in the stratosphere that appears every Southern Hemisphere spring when very cold temperatures and polar winds combine with man\u2011made chemicals. Over Antarctica<\/a> that thinning can grow until it covers an area larger than the entire African continent before slowly shrinking again as the stratosphere warms.<\/p>\n\n\n\n

Anyone who has checked the UV index before a beach trip has felt the practical side of this story. When the ozone layer weakens, that index climbs.<\/p>\n\n\n\n

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Read More: El Ni\u00f1o could return as early as May through July 2026, and the latest official forecasts point to a possibility that has many experts on alert<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n

What made 2025 different<\/h2>\n\n\n\n

In 2025, the Antarctic ozone hole developed relatively early in mid August and then expanded, peaking near 21.08 million square kilometers in early September. After that, it hovered between about 15 and 20 million square kilometers through late October before shrinking quickly during November. The hole finally closed on December 1, one of the earliest endings in the satellite record.<\/p>\n\n\n\n

\"Chart
Copernicus tracking shows the 2025 Southern Hemisphere ozone hole peaked around 21 million square kilometers, then shrank quickly into early closure.<\/figcaption><\/figure>\n\n\n\n

Compared with the huge and persistent holes from 2020 to 2023, which often stretched beyond 25 million square kilometers and lingered well into December, this season looked more modest. Copernicus scientists also noted that ozone inside the hole was generally higher than in those recent extreme years, which supports the idea that the layer is slowly rebuilding.<\/p>\n\n\n\n

It is not a straight line, though. Atmospheric experts point out that factors such as stratospheric temperatures, wind patterns and even volcanic eruptions can nudge the hole larger or smaller from one year to the next. The huge eruption of the Hunga Tonga volcano<\/a> in 2022, for example, injected large amounts of water vapor into the stratosphere that may have helped drive unusually large holes afterward.<\/p>\n\n\n\n

Montreal Protocol and a rare environmental success<\/h2>\n\n\n\n

To a large extent, the hopeful tone around the 2025 season reflects decades of work under the Montreal Protocol. This global treaty has phased out most chlorofluorocarbons and other ozone\u2011depleting substances that once leaked from refrigerators, foams and spray cans into the upper atmosphere.<\/p>\n\n\n\n

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Read More: It is between 300 and 400 million years old, flows through mountains as if they did not exist, and has survived mass extinctions: now, the oldest river on the planet faces its most modern threat<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n

By the United Nations and World Meteorological Organization assessments<\/a>, those chemicals have already peaked in the stratosphere and are slowly declining. Models suggest that if countries keep honoring the treaty and its later amendments, Antarctic ozone should return to near 1980 levels<\/a> around the middle of this century, likely in the 2060s.<\/p>\n\n\n\n

In practical terms, that means fewer extreme ozone hole years<\/a>, a gentler UV index over time and better protection for human health and ecosystems, even as the planet keeps grappling with record heat at the surface.<\/p>\n\n\n\n

Why scientists still urge caution<\/h2>\n\n\n\n

The small 2025 hole is good news, but researchers are careful not to declare victory too early. Year-to-year variability remains high. Wildfires and large volcanic eruptions can temporarily worsen ozone loss, and climate change is altering temperatures and circulation patterns in the stratosphere in ways that are still being studied.<\/p>\n\n\n\n

Experts also warn about emerging pressures, including illegal emissions of banned chemicals and the rapid growth of the space launch industry, which could inject reactive substances into the upper atmosphere and complicate recovery if not managed carefully.<\/p>\n\n\n\n

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Read More: Photos taken from space show an iceberg \u201cboiling\u201d from within: this is the silent collapse of A-23A in the South Atlantic<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n

At the end of the day, the 2025 ozone story is a reminder that global environmental agreements can work when they are enforced and updated, but they still need constant follow up. The small hole over Antarctica may feel far away from the city street or farm field, yet it quietly shapes the sunlight that reaches all of us.<\/p>\n\n\n\n

The official statement was published on Copernicus Atmosphere Monitoring Service<\/em><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

For once, there is climate news that feels like a breath of fresh air. Scientists report that the 2025 Antarctic … <\/p>\n

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