Matthew Siegfried

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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

Matthew Siegfried, Colorado School of Mines and Chloe Gustafson, University of California, San Diego

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.
The northeast edge of the Venable Ice Shelf, near Antarctica’s Allison Peninsula. NASA/John Sonntag

Short‑term changes in Antarctica’s ice shelves are key to predicting their long‑term fate

Helen Amanda Fricker, University of California, San Diego; Fernando Paolo, California Institute of Technology; Matthew Siegfried, Stanford University, and Susheel Adusumilli, University of California, San Diego

Last summer one of Antarctica’s floating ice shelves calved an iceberg the size of Delaware – but scientists say other less dramatic changes reveal more about how and why Antarctica is changing.

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