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April 23, 2019 03:30 am

Greenland Is Melting Even Faster Than Experts Thought, Study Finds

An anonymous reader quotes a report from CNN: Climate change is eliminating giant chunks of ice from Greenland at such a speed that the melt has already made a significant contribution to sea level rise, according to a new study. With global warming, the island will lose much more, threatening coastal cities around the world. Forty percent to 50% of the planet's population is in cities that are vulnerable to sea rise, and the study published Monday in the Proceedings of the National Academy of Sciences is bad news for places like New York, Miami, Los Angeles, Tokyo and Mumbai. Researchers reconstructed the mass balance of the Greenland Ice Sheet by comparing estimates of the amount of ice that has been discharged into the ocean with the accumulation of snowfall in the drainage basins in the country's interior for the past 46 years. The researchers found that the rate of ice loss has increased sixfold since then -- even faster than scientists thought. Since 1972, ice loss from Greenland alone has added 13.7 millimeters (about half an inch) to the global sea level, the study estimates. The island's ice sheet is the leading source of water added to the ocean every year.

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