Diagram of marine ice sheet instability and mitigation with an artificial sill

Brown represents bedrock, light blue represents grounded ice sheet, purple represents floating ice shelf, and gray represents an artificial sill. Ocean temperatures are drawn to represent the typical stratification faced by marine-terminating ice streams: warm salty water at depth and cold fresh water near the surface.

Credit: Wolovick & Moore, The Cryosphere, 2018

• Glacial engineering could limit sea-level rise, if we get our emissions under control (20 September 2018)

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