Researchers have updated their predictions for what melting ice sheets will do to the planet within the next century. By 2100, the shrinking Antarctic and Greenland ice sheets will raise sea levels by nearly 10 inches. The influx of water will disrupt an ocean current vital to our weather, with dangerous consequences.

“We’re dealing with a very delicately balanced system,” said Nicholas Golledge, a climate scientist at the Victoria University of Wellington in New Zealand, who led the new