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Articles on Ice sheets

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Richard Bates and Alun Hubbard kayak a meltwater stream on Greenland’s Petermann Glacier, towing an ice radar that reveals it’s riddled with fractures. Nick Cobbing.

Meltwater is infiltrating Greenland’s ice sheet through millions of hairline cracks – destabilizing its structure

Glaciologists are discovering new ways surface meltwater alters the internal structure of ice sheets, and raising an alarm that sea level rise could be much more abrupt than current models forecast.
Transantarctic Mountains peaks are some of the only parts of the continent not buried beneath ice. Matt Makes Photos / shutterstock

Glaciers have existed on Earth for at least 60 million years – far longer than previously thought

Scientists used satellites to map tens of thousands of glacial landforms in Antarctica’s highest mountains.
Co-author Chloe Gustafson and mountaineer Meghan Seifert install measuring equipment on an ice stream. Kerry Key/Lamont-Doherty Earth Observatory

Scientists in Antarctica discover a vast, salty groundwater system under the ice sheet – with implications for sea level rise

Liquid water below the ice determines how fast an ice stream flows. As the ice sheet gets thinner, more of that salty groundwater could rise.
Community members from Utqiagvik, Alaska, look to open water from the edge of shorefast sea ice. Matthew Druckenmiller

2021 Arctic Report Card reveals a (human) story of cascading disruptions, extreme events and global connections

Sea ice is thinning at an alarming rate. Snow is shifting to rain. And humans worldwide are increasingly feeling the impact of what happens in the seemingly distant Arctic.

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