NSIDC, WDC / SCIENCE PHOTO LIBRARY NSIDC, WDC / SCIENCE PHOTO LIBRARY
Glacial retreat. Image 1 of 4. Franz Joseph Glacier, Westland National Park, New Zealand, in 1951. 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 of the world's glaciers have suffered rapid retreat. See images E235/381 - E235/383 for photos of the same glacier as seen in 1956, 1960 and 1964. 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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