Sea Level Rise Twice As High as Current Projections

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New research on Greenland glaciers suggests that sea level rise will be twice as high the Intergovernmental Panel on Climate Change (IPCC) estimate of 18 to 58 cm (0.6 to 1.9 ft) by 2100. The study, published in the Journal of Glaciology (pdf), combines important data long missing from the ice sheet models. Researchers from the University at Buffalo, Ohio State University, the University of Kansas, and NASA, combined field mapping, remote sensing, satellite imaging, and digital enhancement techniques to glean “hidden” data from historic aerial photographs, some 60 years old.

The resulting two-dimensional pictures are of limited value. But the researchers digitized them, removed the boundaries between them, and turned several pictures into a single ‘mosaic’ producing one data set viewable in three-dimensions. “By reprocessing old data contained in these old photographs and records, we have been able to construct a long-term record of the behavior of the [Jakobshavn Isbrae] glacier,” says lead author, Beata Csatho. “This was the first time that the data from the ’40s could be reused in a coherent way.”

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You can see in this 1946 image how the 4-mile-wide Jakobshavn Isbrae glacier is flowing from the ice through Greenland’s rocky coast. Image courtesy of University at Buffalo.

Other glacier views and data here and here.

Julia Whitty is Mother Jones’ environmental correspondent and 2008 winner of the John Burroughs Medal Award. You can read from her new book, The Fragile Edge, and other writings, here.

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SIX TRUTHS

Reclaiming power from those who abuse it often starts with telling the truth. And in "This Is How Authoritarians Get Defeated," MoJo's Monika Bauerlein unpacks six truths to remember during the homestretch of an election where democracy, truth, and decency are on the line.

Truth #1: The chaos is the point.

Truth #2: Team Reality is bigger than it seems.

Truth #3: Facebook owns this.

Truth #4: When we go to work, we're in the fight.

Truth #5: It's about minority rule.

Truth #6: The only thing that can save us is…us.

Please take a moment to see how all these truths add up, because what happens in the weeks and months ahead will reverberate for at least a generation and we better be prepared.

And if you think journalism like Mother Jones'—that calls it like it is, that will never acquiesce to power, that looks where others don't—can help guide us through this historic, high-stakes moment, and you're able to right now, please help us reach our $350,000 goal by October 31 with a donation today. It's all hands on deck for democracy.

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