(LiveScience) Deep furrows on Antarctica's floating ice shelves mark arch-shaped channels melted out under the ice. Thinner ice floats lower, and researchers can read the corrugated surface topography like a map that mirrors what lies beneath.
Now, a new study published Oct. 6 in the journal Nature Geoscience suggests that in some spots, these surface scars also signal where water drains from beneath Antarctica's giant ice sheets.
"These features on the ice shelf are very long, so it suggests the water is flowing quite steadily and consistently over time," said Anne Le Brocq, lead study author and a glaciologist at the University of Exeter in England.
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