Columbia Glacier, Alaska

Alaska's Columbia Glacier is a tidewater glacier (a glacier that flows into the ocean) that descends through the Chugach Mountains and into Prince William Sound. The glacier is a large 1000 square kilometres and is one the world's fastest moving glaciers. Tidewater glaciers have a tendency to retreat faster than land glaciers as changes in ice thickness from surface melt can create drastic changes in ice flow while land glaciers only lose mass from run off. The glaciers retreat has generated a large amount of icebergs since in the 1980s, however scientists have predicted the glaciers retreat will stop around 2020 when it reaches a new stable position. 

For a deeper look into the world's glaciers and vastly changing landscape check out Chasing Ice

Photos by Andrew Kearns