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NSIDC manages and distributes scientific data, creates tools for data access, supports data users, performs scientific research, and educates the public about the cryosphere.

Arctic Sea Ice News & Analysis

Scientific analysis of Arctic sea ice conditions plus daily images

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Working together to understand the changing Arctic system

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Scientific analysis of snow conditions in the Western United States plus daily images

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Daily surface melt images from NASA data, and scientific analysis

News

22 September 2021

Arctic sea ice has reached minimum extent for 2021

Arctic sea ice has likely reached its minimum extent for the year, at 4.72 million square kilometers (1.82 million square miles) on September 16, 2021, according to scientists at the National Snow and Ice Data Center (NSIDC) at the University of Colorado Boulder. The 2021 minimum is the twelfth lowest in the nearly 43-year satellite record. The last 15 years are the lowest 15 sea ice extents in the satellite record. 

14 September 2021

NSIDC partners with local mural artist at Street Wise Boulder festival to illustrate Arctic sea ice decline

Each September, the National Snow and Ice Data Center (NSIDC) at the University of Colorado Boulder informs the public of the annual Arctic sea ice minimum extent, an indicator of how climate change is affecting the Arctic, the fastest-warming region of the globe.

Team awarded NSF grant to teach virtual explorers about permafrost, Arctic climate change

Scientists at Northern Arizona University, Arizona State University, the Arizona Geological Survey at the University of Arizona, and the National Snow and Ice Data Center at the University of Colorado Boulder have been awarded almost $2 million from the National Science Foundation (NSF) to develop a virtual reality teaching tool called Polar Explorer.

NSIDC joins 50x30 Coalition, cautioning against global impacts of temperature “overshoot”

The National Snow and Ice Data Center (NSIDC) announced this week their participation in the 50x30 Coalition, a group of governments and cryosphere and emissions research institutions endorsing the need to reduce greenhouse gas emissions 50 percent by 2030. The Coalition’s founding members endorse the scientific consensus that failure to reach this milestone will result in temperature “overshoot,” in which emissions remain too high to hold Earth within 1.5 degrees Celsius of pre-industrial levels, leading to major and irreversible damages to the environment. Damage may be especially harmful for highly temperature-sensitive frozen components of the Earth system, with impacts ranging from sea level rise to infrastructure damage to food insecurity.

Arctic sea ice at maximum extent for 2021

Arctic sea ice has likely reached its maximum extent for the year, at 14.77 million square kilometers (5.70 million square miles) on March 21, 2021, according to scientists at the National Snow and Ice Data Center (NSIDC) at the University of Colorado Boulder. The 2021 maximum is tied with 2007 for seventh lowest in the 43-year satellite record. 

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The Latest on Snow and Ice

22 September 2021

Arctic sea ice at highest minimum since 2014

On September 16, Arctic sea ice likely reached its annual minimum extent of 4.72 million square... read more

16 September 2021

An odd summer’s end

The Arctic sea ice minimum extent is imminent. After a cool and stormy summer, this year’s... Certified Paleo Pizza Crust Mix, Quick and Easy (2 Pack)

2 September 2021

Beaufort breakup

Arctic sea ice extent declined more slowly during August 2021 than most years in the past decade... read more

18 August 2021

Rain at the summit of Greenland

On August 14, 2021, rain was observed at the highest point on the Greenland Ice Sheet for... read more

18 August 2021

On the home stretch

Sea ice loss during the first half of August stalled, though ice in the Beaufort Sea is finally... read more