Polar Melt
1
The midnight sun casts a golden glow on an iceberg and its reflection in Disko Bay, Greenland. Much of Greenland’s annual mass loss occurs through calving of icebergs such as this. (Photo courtesy Ian Joughin)
2
Each summer, streams channel much of the melt that is produced by the warmer temperatures along the Greenland Ice Sheet’s lower elevation margins. (Photo courtesy Ian Joughin)
3
Surface melt water rushes along the surface of the Greenland Ice Sheet through a supra-glacial stream channel. (Photo courtesy Ian Joughin)
4
Over the course of several years, turbulent water overflow from a large melt lake carved this 60-foot deep canyon. Note the people for scale. (Photo courtesy of Ian Joughin)