Higher greenhouse-gas emissions would lead to faster ice loss, and lower emissions could slow down the meltdown. But in any case, the loss of Thwaites Glacier appears inevitable, Joughin said: "All of our simulations show it will retreat at less than a millimeter of sea level rise per year for a couple of hundred years, and then, boom, it just starts to really go. In its most recent assessment, the Intergovernmental Panel on Climate Change estimated that global sea levels were likely to rise between 4 inches and 3 feet 10 to 90 centimeters by the year Sridhar Anandakrishnan, a geoscientist at Penn State University who didn't play a role in either study, said future IPCC estimates "will almost certainly be revised, and revised upwards.
Anandakrishnan said future middle-of-the-road estimates for may well zero in on the top end of the current IPCC projection, around 3 feet.
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Without mitigating measures, that amount of sea level rise would inundate significant areas of coastal cities including Miami Beach, New Orleans and New York. Impeachment Inquiry Politics U. Sections U. Follow NBC News.
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Thu 26 Sep Study Resto S5 : u. Fri 27 Sep Study Resto S5 : u. Sat 28 Sep closed Sun 29 Sep closed More opening hours. Warm water soaking the base of the ice sheets, they found, was enough to force key parts of the ice sheet to melt away.
Study finds 24% of West Antarctic ice is now unstable | EurekAlert! Science News
They used that model to predict how the Greenland and Antarctic ice sheets will speed up their melting in the coming decades. It is smaller than the number predicted by the study, which said that Antarctica alone might feed more than three feet of sea level rise into the oceans by The sea level rise estimates may be lower, but the overall picture of how melting ice sheets will affect climate is grim.
Changes in the ice sheets, they found, could influence global climate profoundly—slowing down major ocean circulation pathways, skewing air temperatures around the world, and somewhat surprisingly, making climate more variable from year to year. The impacts are already leaking out of the poles. Does MICI exist?
West Antarctic Ice Sheet collapse – the fall and rise of a paradigm
But scientists are throwing their weight into solving the question. And we certainly should not rule it out, says Alley. Read Caption.
Pine Island Glacier in Antarctica. Most dire projection of sea-level rise is a little less likely, reports say New analysis of Antarctica's melting glaciers refines our understanding of climate change, while risks of global impacts remain significant.
Volcano under West Antarctic ice sheet shows history of activity
By Alejandra Borunda. This footage from February shows a major rift in the ice shelf before the iceberg broke free. The newly independent iceberg is one of the largest ever recorded.
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