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Glacier melting’s link to climate change confirmed

Study finds warming ‘virtually certain’ to blame in many cases of dwindling ice

By
2:03pm, December 12, 2016
Nigardsbreen glacier

ON THIN ICE  Shrinking glaciers such as Nigardsbreen in Norway are virtually certain to be victims of climate change, new research shows.

The decades-long dwindling of glaciers is “categorical evidence of climate change,” a new study affirms.

The link between global warming and glacial retreat had previously garnered only a “likely,” or at least 66 percent probability, rating from the Intergovernmental Panel on Climate Change. Comparing the long-term decline of 37 glaciers, researchers estimate that all but one are “very likely” – or with at least 90 percent probability – the result of climate change.

Natural variability and complex dynamics make sussing out climate change’s role in glacial retreat difficult. Earth system scientist Gerard Roe of the University of Washington in Seattle and colleagues calculated the natural ups and downs of well-documented glaciers from around the world. The researchers then noted how far the glaciers have drifted from that natural variability and compared that

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