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The work of J.T. Overpeck at the University of Arizona and Bette Otto-Bliesner of the National Center for Atmospheric Research in Boulder, Colorado points to the features of the current climate that make this look like a climate in the past when sea levels were six meters higher. "Although ice sheet disintegration and the subsequent sea level rise lags behind rising temperatures, the process will become irreversible sometime in the second half of the 21st century, Overpeck said, 'unless something is done to dramatically reduce human emissions of greenhouse gas pollution.

'We need to start serious measures to reduce greenhouse gases within the next decade. If we don't do something soon, we're committed to four-to-six meters (13 to 20 feet) of sea level rise in the future.'"

You can read the press release here:

Polar melting may raise sea level sooner than expected