Climate Change

Does melting of the East Antarctic Ice Sheet (EAIS) pose a threat to sea level rise? Studies of the ice melt that fuels sea level rise often focus on the prominent warming and melting of glaciers...

In the Rocky Mountains, as in many mountain ranges worldwide, snowpack is getting dirtier. Winds carry fine sediment particles from arid regions, and dust lofted high enough into the atmosphere...

Unlike people, animals, news stories, and sitcoms, Arctic sea ice has not gotten older with time—it has gotten younger. Very little old ice, typically four years old or older, remains. During the...

Scientists take ice core samples in cold, windy, and forbidding environments. After drilling through solid ice to...
The U.S. Coast Guard Cutter Healy encountered only small patches of sea ice in the Chukchi Sea when this...

As higher temperatures create more temperate environments across parts of the Arctic, vegetation is...

Sea ice extent reached a new record low on August 27, 2012 and continued to decline. The last six years have...
permafrost in Alaska

Permafrost, also known as frozen ground, is soil that remains at or below 0°C (32°F) for at least two years. When it thaws, permafrost contributes to global warming by releasing greenhouse gases...

On July 20, 2011, the U.S. Coast Guard Cutter Healy traveled through a break in the sea ice and melt ponds in...

In February, polar climate researchers gathered at the National Center for Atmospheric Research in Boulder, Colorado to discuss the newest updates to models of...

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