The 2011 Greenland melt season was up to 30 days longer than the 1979–2010 average. This color-coded map shows where melt season lasted more or less than average.
The amount of ice flowing from the Antarctic glacier has doubled in the span of three decades, and scientists think it could undergo even more dramatic changes in the near future.
Where once two streams of ice merged in Greenland’s Jakobshavn Glacier, today there is division and a complex surface riddled with crevasses and melt ponds.