One of the ever-looming threats of climate change is sea level rise, which already threatens to displace millions of people worldwide and force them to move inland by the end of the century. A big part of the rising water levels are hotter temperatures at the poles—home to giant glaciers and ice shelves that hold crucial quantities of frozen H2O. The Florida-sized Thwaites glacier in Antarctica, nicknamed the “doomsday glacier,” is already losing 50 billion tons of ice each year. That in itself accounts for around 4 percent of annual global sea level rise. But unpublished research shared at the...