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Greenland's glacial basics

Sliding of the Greenland ice sheet is affected by the production of surface meltwater. A new theory shows that whether the result is a long-term speed-up or slow-down of ice motion depends on the variability in melt input. See Letter p.803

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Figure 1: Exploring a subglacial artery.



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Lüthi, M. Greenland's glacial basics. Nature 468, 776–777 (2010).

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