Overview
- A Nature Communications study from the iC3 Polar Research Hub reports that channels carved into the base of Antarctic ice shelves trap warmer water and boost local melt rates by about tenfold.
- The work centers on the Fimbulisen shelf in East Antarctica, a site long considered cold and less vulnerable than other parts of the continent.
- The team explains that the grooves stir small eddies that hold warm deep water under the ice instead of letting it flush out.
- Researchers paired a detailed underside map with a high‑resolution ocean cavity model and ran four cases to measure the impact of smooth versus rilled ice and cooler versus warmer waters.
- The authors warn that models need this geometry because thinner shelves weaken the buttress that slows glaciers, which can speed ice loss and raise seas for coastal communities.