Polar Melt
![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)](https://gdb.voanews.com/9D79DC7B-A9D1-436E-965C-F66A6A4C17DF_w1024_q10_s.jpg)
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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)
![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)](https://gdb.voanews.com/6CD5D633-27E7-442B-8764-79820933C74C_w1024_q10_s.jpg)
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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)
![Surface melt water rushes along the surface of the Greenland Ice Sheet through a supra-glacial stream channel. (Photo courtesy Ian Joughin)](https://gdb.voanews.com/3F8FA53F-4DBC-4C4C-8AE5-E124BADED8FF_w1024_q10_s.jpg)
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Surface melt water rushes along the surface of the Greenland Ice Sheet through a supra-glacial stream channel. (Photo courtesy Ian Joughin)
![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)](https://gdb.voanews.com/2354C3E9-90A2-4776-9032-166DB76952F0_w1024_q10_s.jpg)
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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)