Evolution of sub-ice-shelf channels reveals changes in ocean-driven melt in West Antarctica
Karen E. Alley,
Richard B. Alley,
Alex D. Crawford
et al.
Abstract:Basal channels, which are troughs carved into the undersides of ice shelves by buoyant plumes of water, are modulators of ice-shelf basal melt and structural stability. In this study, we track the evolution of 12 large basal channels beneath ice shelves of the Amundsen and Bellingshausen seas region in West Antarctica using the Landsat record since its start in the 1970s through 2020. We observe examples of channel growth, interactions with ice-shelf features, and systematic changes in sinuosity that give insi… Show more
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