Skip to main content

Sign up for our newsletter.

Quality journalism. Progressive values. Direct to your inbox.

In the Arctic Ocean, sea ice reached its minimum extent of 1.44 million square miles (3.74 million square kilometers) on Sept. 15—the second-lowest extent since modern record keeping began. (Image: NASA's Scientific Visualization Studio)

In the Arctic Ocean, sea ice reached its minimum extent of 1.44 million square miles (3.74 million square kilometers) on Sept. 15—the second-lowest extent since modern record keeping began. (Image: NASA's Scientific Visualization Studio)

'Another Alarm Bell in the Climate Emergency' as Arctic Sea Ice Shrinks to Second Lowest Extent on Record

"We are headed towards a seasonally ice-free Arctic Ocean, and this year is another nail in the coffin."

Andrea Germanos

Arctic sea ice shrank to the second-lowest extent since records began over four decades ago, federal scientists said Monday, prompting renewed warnings about the climate crisis.

The minimum ice cover for 2020 was likely reached on Sept. 15, scientists at the National Snow and Ice Data Center (NSIDC) announced. On that date, ice measured 1.44 million square miles (3.74 million square kilometers). That coverage is 135,000 square miles (350,000 square kilometers) more than the lowest extent of ice recorded in 2012.

"The Earth just rang another alarm bell in the climate emergency," said Arlo Hemphill, senior oceans campaigner at Greenpeace USA.

The near record comes amid what NSIDC director Mark Serreze described as "a crazy year up north, with sea ice at a near-record low, 100-degree F heat waves in Siberia, and massive forest fires."

The finding also marks the continuation of a trend: the 14 lowest minimum Arctic sea ice extents were all recorded in the last 14 years, scientists noted.

"The year 2020 will stand as an exclamation point on the downward trend in Arctic sea ice extent. We are headed towards a seasonally ice-free Arctic Ocean, and this year is another nail in the coffin," said Serreze.

NASA, which supported the analysis, explained further:

A Siberian heat wave in spring 2020 began this year's Arctic sea ice melt season early, and with Arctic temperatures being 14 to 18 degrees Fahrenheit (8 to 10 degrees Celsius) warmer than average, the ice extent kept declining. The 2020 minimum extent was 958,000 square miles (2.48 million square kilometers) below the 1981-2010 average of yearly minimum extents, and 2020 is only the second time on record that the minimum extent has fallen below 1.5 million square miles (4 million square kilometers).

"The extent of summer sea ice in the Arctic can impact local ecosystems, regional and global weather patterns, and ocean circulation," NASA noted, and shared this video to accompany the new analysis:

Serreze added that the ice "is shrinking in the summer, but it's also getting thinner."

"You're losing extent, and you're losing the thick ice as well," he said. "It's a double whammy."

Laura Meller, Greenpeace Nordic Oceans Campaigner, said the new data is cause for concern.

"The rapid disappearance of sea ice is a sobering indicator of how closely our planet is circling the drain," Meller said in a statement from onboard the Greenpeace ship Arctic Sunrise. "As the Arctic melts, the ocean will absorb more heat, and all of us will be more exposed to the devastating effects of climate breakdown."


Our work is licensed under Creative Commons (CC BY-NC-ND 3.0). Feel free to republish and share widely.

This is the world we live in. This is the world we cover.

Because of people like you, another world is possible. There are many battles to be won, but we will battle them together—all of us. Common Dreams is not your normal news site. We don't survive on clicks. We don't want advertising dollars. We want the world to be a better place. But we can't do it alone. It doesn't work that way. We need you. If you can help today—because every gift of every size matters—please do. Without Your Support We Simply Don't Exist.

Please select a donation method:

'A Devastating Failure': Eviction Ban Expires as House Goes on Vacation and Biden Refuses to Act

"We’re now in an eviction emergency," said Rep. Cori Bush. "Eleven million are now at risk of losing their homes at any moment. The House needs to reconvene and put an end to this crisis."

Jake Johnson ·


With Election Days Away, Bernie Sanders Headlines Get-Out-the-Vote Rally for Nina Turner

In his keynote speech, Sanders said corporate interests are pulling out all the stops to defeat Turner because "they know that when she is elected, she is going to stand up and take them on in the fight for justice."

Jake Johnson ·


Bush, Pressley, and Omar Sleep Outside Capitol to Demand Extension of Eviction Moratorium

Rep. Cori Bush, who was formerly unhoused, slammed her Democratic colleagues who "chose to go on vacation early today rather than staying to vote to keep people in their homes."

Jake Johnson ·


As Progressives Call for End to Blockade, Biden Announces More Sanctions Against Cuba

The move comes after Democratic leadership in the House blocked an amendment to roll back limits on how much money people in the United States can send to family on the island nation.

Jessica Corbett ·


Progressives Issue Dire Warning as House Bill to Extend Eviction Moratorium Dies

"If Congress does not act now, the fallout of the eviction crisis will undoubtedly set us backwards as the Covid-19 pandemic continues to ravish our communities, needlessly contributing to more death and destruction."

Brett Wilkins ·