Increasing surface runoff from Greenland’s firn areas

Nature Climate Change, Published online: 16 June 2022; doi:10.1038/s41558-022-01371-z

Ice that melts at high elevation often refreezes and, therefore, does not contribute to the shrinking of ice sheets. Here, the authors show that the elevation at which melting ice starts to contribute to runoff has increased over recent years in Greenland, expanding the runoff area by 29%.