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@leonardodicaprio : #Regram #RG @nytimes: From @nytmag | In March, Geophysical Research Letters reported that the western part of #Greenland’s ice sheet is melting at its fastest rate in at least 450 years. Some scientists believe that the Arctic hasn’t seen ice melt similar to this in 5,000 years. If the ice sheet melts entirely, sea levels would rise 20 feet, leaving Lower Manhattan underwater. Jason Gulley, a geologist, and Celia Trunz, a PhD student in geology, have been conducting meltwater research by releasing a fluorescent red dye to determine how and why more rivers form on the surface of the ice sheet and what will happen as a result of these new rivers. So far, they’ve found that the rivers lubricate the ice slab, making the sheets move faster toward the coasts — which could cause even more icebergs to calve into the ocean. @geosteinmetz took this #aerialphoto in Greenland while on assignment for @nytmag. This week's issue of the magazine is an unusual one, with just a single story, by Nathaniel Rich: Humans almost saved the planet from #climatechange 30 years ago. Visit the link in our profile to read about how we failed.