Northwestern Glacier, Alaska, in 1940

Northwestern Glacier, Alaska, in 1940

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This image is part of the feature Glacier Retreat

Credit: NSIDC, WDC/SCIENCE PHOTO LIBRARY

Caption: Glacial retreat. Image 1 of 2. Northwestern Glacier, Kenai Fjords National Park, Alaska, in 1940. 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 E235/403 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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Keywords: 1940, 20th century, alaska, alaskan, american, archival, archive, before retreat, before shrinkage, black-and-white, climate change, climatological, climatology, compared, comparing, disappearing, disappearing glacier, environment, geographical, geography, geological, geology, glacial loss, glacier, glaciology, global warming, history, ice, kenai fjords national park, monochrome, mountain, north america, northwestern glacier, nsidc, pre-global warming, pre-shrinkage, repeat photography, retreat, retreating glacier, sequence, series, snow, united states, us, usa, water, wdc

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