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Articles on Ice sheets

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The scientific research ship JOIDES Resolution on an expedition to the southwest Indian Ocean in 2015. Xinhua/Zhang Jiansong via Getty Images

The workhorse ship of ocean drilling may have made its last voyage – here’s why scientists don’t want to see the JOIDES Resolution mothballed

The National Science Foundation says that the JOIDES Resolution has become too costly to fund. But scientists say its $72 million annual budget pales compared with discoveries the ship has enabled.
Under a microscope, a tiny elongate poppy seed, small tan spikemoss megaspores and black soil fungus spheres found in soil recovered from under 2 miles of Greenland’s ice. Halley Mastro/University of Vermont

Ancient poppy seeds and willow wood offer clues to the Greenland ice sheet’s last meltdown and a glimpse into a warmer future

Our discovery of a tundra ecosystem, frozen under the center of Greenland’s ice sheet, holds a warning about the threat that climate change poses for the future.
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.

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