Brief
Antarctic sea ice winter maximum hits third‑lowest level on record in 2026
NASA and NSIDC say the 2026 winter peak was the third lowest since satellite monitoring began, underscoring a reversal from earlier growth trends.
By Felo News Desk · Published
NASA and the National Snow and Ice Data Center (NSIDC) reported that Antarctic sea ice reached its annual winter peak on 14 September 2026, covering about 17.59 million square kilometres (6.79 million square miles). That extent ranks as the third‑lowest winter maximum in the satellite record, marking a sharp reversal from the growth trend observed in earlier decades.
What happened
Satellite observations show the ice sheet expanded during the Southern Hemisphere winter, as usual, but the total area at its peak was far below the long‑term average. The 2026 maximum was only slightly larger than the 2025 figure and well below the highs recorded between 2012 and 2014, when Antarctic winter sea ice set consecutive record highs.
What the report adds
The ScienceDaily article explains that the Antarctic ocean allows sea ice to spread outward over vast distances, unlike the Arctic where land confines the ice. This geographic feature means that winter ice can be pushed into warmer latitudes, increasing the risk of summer melt. The piece also notes that researchers use a 15 percent coverage threshold to define ice‑covered water when calculating total extent.
What was said
According to the release, NASA and NSIDC said the ice likely reached its maximum on 14 September, and the extent measured was 17.59 million square kilometres. No direct quotations were provided in the source.
How it came about
For decades, Antarctic sea ice appeared to grow, increasing about 1 percent per decade between 1979 and 2014. The upward trend was most pronounced from 2012 to 2014, when winter extents set new records each year, contrasting sharply with the rapid decline in the Arctic. However, the growth halted in 2015, and since 2016 the region has experienced substantial losses, with the 2023 winter maximum and summer minimum both hitting historic lows. The 2026 figure continues this downward trajectory, illustrating a broader shift in polar ice dynamics.
Key facts
- Antarctic sea ice peaked at 17.59 million sq km on 14 September 2026, the third‑lowest winter maximum on record. (sciencedaily.com)
- NASA and NSIDC provided the satellite measurements for the 2026 winter extent. (sciencedaily.com)
- Since 2015, Antarctic sea ice has generally remained below its historical average after a decades‑long growth period. (sciencedaily.com)
Sources
- [1] sciencedaily.com — originally reported as “Antarctica’s sea ice has undergone a stunning reversal”
