Another Contributor to Sea-Level Rise?

Scientific American: “In a finding offering another sea-level rise warning, scientists … reported the existence of deep, canyon-like valleys in the bedrock underneath the Greenland ice sheet that could facilitate the extensive flow of ice into the ocean.”

“That means that as these glaciers retreat, their fronts will remain in contact with warm ocean water that melts ice, rather than hitting higher ground anytime soon. ”

“Greenland’s ultimate contribution to sea-level rise is a subject of ongoing debate among scientists. A report from the Intergovernmental Panel on Climate Change last year found that between 1993 and 2010, the Greenland ice sheet contributed less than 10 percent to global sea-level rise. Thermal ocean expansion of the ocean and glaciers contributed the most.”

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