Earlier research had put that threshold a little higher, with a best estimate of 3.1 degrees Celsius. To put these numbers in perspective, climate scientists said the Earth’s surface has already warmed by more than 0.7 degrees Celsius since the Industrial Revolution, when humans began pumping out large amounts of greenhouse gases, particularly carbon dioxide.
According to researchers, the Greenland ice sheet matters because the ice it contains would substantially raise sea level if it melted, LiveScience reported.
Antarctica, too, is covered in ice and could contribute to sea-level rise. Warming is also expected to melt other pockets of ice around the world.