Glaciers in part of Antarctica have started to thaw fast, adding to rise in sea level that threatens coasts and cities from New York to Shanghai, a team of scientists said in a study published on Thursday.
Another expert in the field immediately cast doubt on the conclusions of the study.
The glaciers along a stretch of coast about 750 km (470 miles) long in the southern Antarctic Peninsula, which snakes up toward South America, began to thin suddenly from around 2009, the team that produced the study said.