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Arctic sea ice ties 10th-lowest minimum as ice grows younger and thinner

Arctic sea ice ties 10th-lowest minimum as ice grows younger and thinner

Built World

2026 minimum reached September 12; ice has regrown since, but the long-term decline continues.

October 26th, 2026: Study narrows future winter sea ice projections

Overview

Updated Nov 2

Arctic sea ice hit its annual minimum on September 12, covering 4.60 million square kilometers. That tied 2008, 2010, and 2025 for the 10th-lowest daily extent in the satellite record.

Ice has regrown quickly. By October 15, extent was about 40 percent above the minimum and the highest for that date since 2015, though still below every year before 2007. The remaining ice is younger and thinner than in the 1980s; a 2026 Nature Geoscience study projected future winter ice about 1 million square kilometers lower than earlier estimates.

Why it matters

Arctic sea ice is shrinking in every season, and scientists project an ice-free summer before 2050.

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Key Indicators

4.60 million sq km
2026 September minimum extent
Reached September 12, tied for 10th lowest in the satellite record.
10th lowest
Ranking in satellite record
Tied with 2008, 2010, and 2025.
11.6% per decade
September ice loss trend
Rate of decline from 1979 to 2026 relative to the 1981-2010 average.
1.60 million sq km
September 2026 average below 1981-2010 average
The monthly average was 1.60 million square kilometers below the baseline, an area more than twice the size of Texas.

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People Involved

WM
Walt Meier
Senior scientist, National Snow and Ice Data Center
Active
CF
Crystal Fu
Lead author, Nature Geoscience study
Researcher, University of Cambridge

Organizations Involved

National Aeronautics and Space Administration (NASA)
National Aeronautics and Space Administration (NASA)
Federal space agency
Tracks Arctic sea ice via satellite

NASA's Earth Observatory monitors Arctic sea ice extent using satellite data.
National Snow and Ice Data Center (NSIDC)
National Snow and Ice Data Center (NSIDC)
Federal research center
Maintains the satellite sea ice record

The National Snow and Ice Data Center at the University of Colorado Boulder maintains the satellite sea ice record.
MO
Met Office
National weather service
Publishes independent sea ice analysis

The UK Met Office publishes its own end-of-season sea ice analysis.

Timeline

1978 October 2026

8 events Latest: October 26th, 2026 · 2 weeks ago
Tap a bar to jump to that date

  1. Study narrows future winter sea ice projections

    Latest Study

    A Nature Geoscience study used mid-Holocene sediment records to weight climate models. It projected future winter Arctic sea ice about 1 million square kilometers lower than earlier estimates.

  2. NASA and NSIDC report the 2026 minimum

    Report

    NASA and NSIDC publish analyses of the 2026 minimum, noting the ice is younger and thinner.

  3. Arctic ice extent climbs about 40 percent from minimum

    Measurement

    By October 15, Arctic-wide sea ice extent was the 14th lowest in NSIDC data and the highest for that date since 2015, though still below every year before 2007.

  4. 2026 minimum reached at 4.60 million sq km

    Measurement

    Arctic sea ice reaches its annual minimum, tied for 10th lowest with 2008, 2010, and 2025.

  5. Winter maximum ties lowest on record

    Milestone

    March 2026 maximum statistically ties March 2025 for the lowest winter peak.

  6. Record lowest September minimum observed

    Milestone

    September ice extent falls to its smallest level in the satellite record.

  7. Arctic enters era of record-low September extents

    Milestone

    September ice extent drops sharply, starting a 20-year run of record lows.

  8. Satellite monitoring of Arctic sea ice begins

    Milestone

    Continuous satellite tracking of Arctic sea ice extent begins.

Scenarios

1

Arctic records first ice-free summer before 2050

Likely Resolves by End of 2050

Discussed by: NASA and NSIDC scientists

NASA and NSIDC project an essentially ice-free Arctic summer at least once before mid-century. 'Nearly ice-free' means very low September coverage, not complete disappearance. A combination of continued warming and a favorable weather year could push the ice below that threshold.

2

September ice extent stays on its plateau

Possible Resolves by End of 2030

Discussed by: Met Office analysis

The Met Office says September extent has changed little since 2007. It links the slower decline to lower pressure over Greenland and the Arctic Ocean, which brought more storms. If that pattern continues, September minimums could stay near current levels, though still far below pre-2007 averages.

3

New record low breaks 2012's mark

Possible Resolves by End of 2035

Discussed by: NASA Earth Observatory

The 2012 record has stood for 14 years, but the long-term trend points downward. A summer with clear skies, warm temperatures, and favorable wind patterns could push September extent below the 2012 level. The recent plateau makes this less imminent, but the underlying trend remains negative.

4

Winter sea ice falls about 1 million sq km below current projections

Possible Resolves by End of 2035

Discussed by: Authors of a 2026 Nature Geoscience palaeoclimate study

A study in Nature Geoscience weighted climate models against mid-Holocene ice biomarkers. Its projections put future winter sea ice extent nearly 1 million sq km lower than earlier multi-model estimates over coming decades. That would accelerate the already-observed decline in the March maximum.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

September 2012

2012 record low (September 2012)

Arctic sea ice fell to its smallest September extent in the satellite record, far below anything previously observed. The 2007 record, set just five years earlier, was broken by a wide margin.

Then

The 2012 minimum became the benchmark for extreme melt years, and no year since has matched it.

Now

The record showed what a combination of long-term warming and favorable weather can produce, and it remains the lowest September extent on record.

Why this matters now

The 2012 record is the reference point for the current story. The 2026 minimum is 10th lowest, but the record from 2012 still stands, showing the difference between an extreme weather year and the long-term trend.

September 2007

2007 sudden drop (September 2007)

September ice extent dropped sharply, falling well below the previous record. The melt was driven by warm temperatures, clear skies, and wind patterns that pushed ice out of the Arctic.

Then

2007 marked the beginning of a new era. Every summer since has ranked among the 20 lowest September extents in the satellite record.

Now

The 2007 event showed that the Arctic could lose ice far faster than models predicted, and it reset expectations for what was possible.

Why this matters now

The 2007 drop began the 20-year run of record-low extents that includes the 2026 minimum. It marks the point where the Arctic shifted from gradual decline to a new, lower baseline.

Sources

(11)
+5
ScienceDaily NASA Science National Snow and Ice Data Center Met Office Carbon Brief Nature Geoscience Alaska Arctic Climate SciBeat Climate.us National Snow and Ice Data Center National Snow and Ice Data Center