Ocean Water Is Seeping Under the Doomsday Glacier—and Its Sea-Level Threat Just Doubled

One of Earth’s most dangerous glaciers is emerging as a potentially greater driver of future sea-level rise than previously understood.

A team of glaciologists at the University of California and NASA’s Jet Propulsion Laboratory developed a new ice sheet model to come up with a more accurate projection of the melting of Thwaites Glacier in West Antarctica. The findings, published in Nature Communications, estimate that the glacier could contribute up to 1.2 inches (30 millimeters) of sea level rise by…