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New map reveals hidden valleys beneath Greenland's ice sheet

Original: A new map of the terrain beneath the Greenland Ice Sheet links hundreds of valleys that previous maps missed or left fra

NASA's Earth Observatory has published a new map of the terrain beneath the Greenland Ice Sheet, showing hundreds of subglacial valleys that earlier maps missed or left fragmented. The updated picture of the bedrock landscape links these valleys into connected systems, improving understanding of how meltwater may drain and how the ice sheet could respond to warming.

Why now: The detailed new mapping matters because subglacial terrain shapes how Greenland's ice drains and contributes to sea-level rise.

NASAGreenland Ice SheetEarth Observatory

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Evidence

• A new map of the terrain beneath the Greenland Ice Sheet links hundreds of valleys that previous maps missed or left fragmented. https:// science.nasa.gov/earth/earth-o bservatory/uncovering-the-valleys-hidden-below-greenlands-ice/ # Environment # Climate # Science # NASA #… · gclef@vivaldi.net · 5

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