MATT NOLAN, NSIDC, WDC / SCIENCE PHOTO LIBRARY MATT NOLAN, NSIDC, WDC / SCIENCE PHOTO LIBRARY
Glacial retreat. Image 2 of 2. Panoramic photograph of McCall Glacier, Arctic National Wildlife Refuge, Alaska, in 2004. Compared to a photograph taken from a similar view point in 1958 (E235/398), the glacial ice has thinned dramatically and there is an absence of snow and ice on the mountains. 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. 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.
Model release not required. Property release not required.