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On the Rocks 

Icebergs 200 feet tall, formerly part of the Greenland Ice Sheet, float the North Atlantic Ocean, raising sea levels as they melt.

Image credit: photos courtesy of the Extreme Ice Survey

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Uploaded: Feb 18, 2010 | Post / Read Comments (2)

Image Archives: Stories: the Extreme Ice Survey

  • James Balog installs “Cliff,” a glacier-watching camera, alongside Alaska’s Columbia Glacier in 2007.
  • On the Rocks
  • James Balog installs “Cliff,” a glacier-watching camera, alongside...
  • photos courtesy of the Extreme Ice Survey
  • Feb 18, 2010
  • The surface area of Glacier National Park’s Sperry Glacier has decreased 75 percent since 1850, when Glacier National Park featured 150 glaciers. In 1968, global warming had reduced that number to just over 50. By 1998, the park had 27 glaciers; that number remains the official count as of today. Scientists predict the park will be glacier-less by 2030.
  • On the Rocks
  • The surface area of Glacier National Park’s Sperry...
  • photos courtesy of the Extreme Ice Survey
  • Feb 18, 2010
  • Icebergs 200 feet tall, formerly part of the Greenland Ice Sheet, float the North Atlantic Ocean, raising sea levels as they melt.
  • On the Rocks
  • Icebergs 200 feet tall, formerly part of the...
  • photos courtesy of the Extreme Ice Survey
  • Feb 18, 2010
  • Glacier National Park’s Grinnell Glacier has retreated steadily for more than a century. The glacier’s surface area was 2.33 sq. km in 1850 and 0.88 sq. km in 1993, the date of the last precise survey. It has already lost about 90 percent of its volume since 1910, and experts expect considerable destruction of the glacier in the next 10 years.
  • On the Rocks
  • Glacier National Park’s Grinnell Glacier has retreated steadily...
  • photos courtesy of the Extreme Ice Survey
  • Feb 18, 2010
  • Alaska’s Columbia Glacier, pictured here in 2006, has retreated a total of 10 miles since 1984. When tidewater glaciers like Columbia reach an unstable phase, vast amounts of ice can be dumped rapidly into the sea.
  • On the Rocks
  • Alaska’s Columbia Glacier, pictured here in 2006, has...
  • photos courtesy of the Extreme Ice Survey
  • Feb 18, 2010

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