Arctic Winter Sea Ice Matches Record Low, Say NASA, NSIDC

Sea ice in the Arctic reached its annual maximum extent on March 15, 2026, peaking at coverage area of 5.52 million square miles.

Mar. 27, 2026 at 4:18am

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For the second consecutive year, winter sea ice in the Arctic reached a level that matches the lowest peak observed since satellite monitoring began in 1979. Scientists with NASA and the National Snow and Ice Data Center (NSIDC) at the University of Colorado, Boulder, note that the two years are statistically tied. Along with the overall extent, researchers are also observing changes in ice thickness, with much of the ice in the Arctic being thinner this year, especially in the Barents Sea northeast of Greenland.

Why it matters

The low levels of Arctic sea ice are a concerning trend, as sea ice plays a crucial role in regulating the Earth's climate and supporting Arctic ecosystems. The continued decline of sea ice could have far-reaching consequences, including accelerating global warming, disrupting marine life, and impacting local communities that rely on the ice for transportation and subsistence.

The details

The Arctic sea ice extent reached 5.52 million square miles (14.29 million square kilometers) on March 15, 2026, very close to the 2025 peak of 5.53 million square miles (14.31 million square kilometers). Scientists also observed that much of the ice in the Arctic is thinner this year, especially in the Barents Sea northeast of Greenland and the Sea of Okhotsk that borders northern Japan and Russia.

  • On March 15, 2026, Arctic sea ice extent reached its annual maximum.
  • In 2025, the Arctic sea ice extent peaked at 5.53 million square miles (14.31 million square kilometers).

The players

NASA

The National Aeronautics and Space Administration, a U.S. government agency responsible for the civilian space program, as well as aeronautics and space research.

NSIDC

The National Snow and Ice Data Center, a research center at the University of Colorado, Boulder, that focuses on the cryosphere, including sea ice, glaciers, and snow cover.

Nathan Kurtz

The chief of the Cryospheric Sciences Laboratory at NASA's Goddard Space Flight Center in Greenbelt, Maryland.

Walt Meier

An ice scientist at the NSIDC.

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What they’re saying

“Based on what we're seeing with NASA's ICESat-2 satellite, much of the ice in the Arctic is thinner this year, especially in the Barents Sea northeast of Greenland.”

— Nathan Kurtz, chief of the Cryospheric Sciences Laboratory at NASA's Goddard Space Flight Center

“A low year or two don't necessarily mean much by themselves. But viewed within the long‑term downward trend since 1979, they add to the overall picture of change in Arctic sea ice throughout the seasons.”

— Walt Meier, ice scientist at NSIDC

What’s next

Scientists will continue to monitor the Arctic sea ice extent and thickness using satellite data from NASA and other agencies. They will also analyze the long-term trends and implications of the declining sea ice for the global climate and Arctic ecosystems.

The takeaway

The record-low Arctic sea ice extent, observed for the second consecutive year, is a concerning sign of the ongoing effects of climate change. The thinning of the ice and the long-term downward trend highlight the urgent need to address the root causes of global warming and take action to mitigate its impacts on the fragile Arctic environment.