Pedersen Glacier, Alaska, in 1920

Pedersen Glacier, Alaska, in 1920

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This image is part of the sequence environment: the retreat of Pedersen glacier in Alaska from 1920 to 2005
This image is part of the feature Glacier Retreat

Credit: NSIDC, WDC/SCIENCE PHOTO LIBRARY

Caption: Glacial retreat. Image 1 of 2. Pedersen Glacier, Kenai Fjords National Park, Alaska, in 1920. Glaciers are large, slow-moving expanses of ice, formed from compacted layers of snow. They are sensitive to climate change and in recent years most have retreated dramatically. See image E235/401 for a photograph taken from the same viewpoint in 2005. The National Snow and Ice Data Center (NSIDC) is a US body that supports research into snow, ice, glaciers, frozen ground and climate interactions that make up the Earth's cryosphere. The World Data Center for Glaciology (WDC) in Boulder, USA, is responsible for archiving all available glaciological information.

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