Something Strange Is Happening to the Ozone Layer North of Alaska — Scientists Are Watching

This is ALASKA. And high above it, something strange is happening to the ozone layer.

Far above northern Alaska and the Arctic, scientists are tracking changes in a part of the atmosphere most people rarely think about. Every winter, the polar stratosphere becomes extremely cold. A powerful circulation known as the polar vortex forms. And under the right conditions, chemical reactions can begin destroying ozone.

That matters because ozone is Earth’s natural shield against harmful ultraviolet radiation.

The Arctic is not Antarctica. A massive, recurring Antarctic-style ozone hole does not normally form over the North Pole. But significant Arctic ozone depletion does occur, particularly during late winter and early spring—and the amount can change dramatically from one year to the next depending on temperatures and atmospheric circulation.

And Alaska sits directly beneath one of the regions scientists are watching.

NASA satellites continuously map ozone across the Northern Hemisphere, while instruments on the ground and balloons launched into the atmosphere help researchers measure what is happening at different altitudes. NASA’s latest Arctic monitoring continues to track ozone, temperatures and the size of the polar vortex across the 2025–2026 season.

So what are scientists actually seeing?

Could the Arctic ever develop something resembling Antarctica’s famous ozone hole?

Why can an unusually cold stratospheric winter suddenly cause ozone levels to fall?

And what happens when lower ozone combines with snow and ice that can reflect enormous amounts of ultraviolet radiation back through the Arctic environment?

In northern Alaska, that last question is especially important. NOAA notes that fresh snow can reflect as much as 90% of incoming UV radiation, which can amplify exposure in Arctic environments.

But there is another side to this story.

The ozone layer is also one of humanity’s biggest environmental recovery stories.

After countries around the world restricted ozone-destroying chemicals through the Montreal Protocol, concentrations of many of those substances began declining. Scientists now continue monitoring whether the ozone layer is recovering as expected—and what changing atmospheric conditions could mean for that recovery.

In fact, NOAA and international researchers are preparing the Scientific Assessment of Ozone Depletion: 2026, bringing together the latest evidence on ozone-depleting substances, polar ozone, climate interactions and the future of the ozone layer.

In this DiscoverTube investigation, we travel from Alaska into the stratosphere to understand one of the most important protective layers surrounding our planet.

Because something strange really does happen above the Arctic every winter.

And to understand what scientists are watching now, we first have to understand how close humanity once came to creating a very different atmosphere.

Sources & further reading
NASA Ozone Watch — Latest Arctic Ozone Status
https://ozonewatch.gsfc.nasa.gov/NH.html

NASA Ozone Watch — Latest Ozone Monitoring
https://ozonewatch.gsfc.nasa.gov/

NASA Arctic Ozone Maps — 2026
https://ozonewatch.gsfc.nasa.gov/monthly/

NASA Arctic Ozone Map — September 27, 2026
https://ozonewatch.gsfc.nasa.gov/Scripts/big_image.php?date=2026-09-27&hem=N

NOAA — Scientific Assessment of Ozone Depletion: 2026
https://www.csl.noaa.gov/assessments/ozone/2026/

NOAA — 2026 Ozone Assessment Overview
https://www.csl.noaa.gov/assessments/ozone/2026/overview.html

NOAA — Ozone Assessment Reports
https://csl.noaa.gov/assessments/ozone/

WMO — Scientific Assessment of Ozone Depletion: 2022
https://wmo.int/media/17403
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