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Unmanned Submarine Maps Antarctica's Ice Shelf Erosion

4/17/2026

Summary

Story summary

The unmanned submarine Ran mapped the Dotson Ice Shelf in West Antarctica to study how ocean currents erode ice shelves.
The mission was led by Anna Wåhlin of the University of Gothenburg.
Ran’s sonar mapped 54 square miles, revealing terraces, channels, and teardrop-shaped pits hidden from satellites.
Although contact with Ran was lost, the data indicate warm water significantly drives ice loss and challenges melt models, with sea-level implications.

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Story summary

The unmanned submarine Ran mapped the Dotson Ice Shelf in West Antarctica to study how ocean currents erode ice shelves.
The mission was led by Anna Wåhlin of the University of Gothenburg.
Ran’s sonar mapped 54 square miles, revealing terraces, channels, and teardrop-shaped pits hidden from satellites.
Although contact with Ran was lost, the data indicate warm water significantly drives ice loss and challenges melt models, with sea-level implications.