Arctic sea ice at 7th lowest September

Arctic sea ice extent for September 2017 was 4.87 million square kilometers (1.88 million square miles). The magenta line shows the 1981 to 2010...

Arctic sea ice at minimum extent

Arctic sea ice extent likely reached its annual minimum extent on September 13, 2017. Credit: NSIDC. High-resolution image.Arctic sea ice extent has likely reached...

The Arctic sets yet another record low maximum extent

This photograph from a March 27, 2015 NASA IceBridge flight shows a mixture of deformed, snow-covered, first-year sea ice floes, interspersed by open-water leads,...

2016 ties with 2007 for second lowest Arctic sea ice minimum

The National Snow and Ice Data Center (NSIDC) is part of the Cooperative Institute for Research in Environmental Sciences at the University of Colorado Boulder. NSIDC scientists...

Scientists find massive reserves of mercury hidden in permafrost

Alessio Gusmeroli and Tim Schaefer drill a permafrost core on the North Slope of Alaska near Deadhorse. Credit: Kevin Schaefer, NSIDC. High-resolution imageResearchers have...

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