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98 viewsA herd of several thousand caribou stalled our progress as they crossed the Dalton highway near Deadhorse, Alaska on July 12, 2009. (Credit: Tingjun Zhang, NSIDC)
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97 viewsField camp crew check the research plane on standby during the 2013 Arctic Observing Network (Snownet) fieldwork in Alaska.
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94 viewsThis plug of turf dug up near Barrow, Alaska shows a typical soil profile in tundra. The vegetation consists of moss and grass. A layer of dark brown organic matter extends down to a depth of 10 centimeters and beneath the organic layer is fine silt (Credit: Elchin Jafarov, NSIDC).
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94 viewsResearchers check their gear during the 2013 Arctic Observing Network (Snownet) project in Alaska.
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94 viewsPart of Brooks Range rises over the distance.
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93 viewsLin Liu and Andy Persekian check active layer depth measurements on a laptop as Elchin Jafarov looks on. (Credit: Kevin Schaefer, NSIDC)
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93 viewsTingjun Zhang drags the antenna for the ground penetrating radar while Alessio Gusmeroli records the active layer depth readings on August 16, 2012. (Credit: Tingjun Zhang, NSIDC).
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92 viewsLin Liu, Andy Parsekian, and Elchin Jafarov pull a ground penetrating radar unit through the tundra near Barrow, Alaska on August 10, 2013. The radar unit is in the box and the computer records the active layer depth (Credit: Kevin Schaefer, NSIDC).
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91 viewsKevin Schaefer drains his mud boots after a day of sloshing through wet tundra. (Kevin Schaefer, NSIDC)
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91 viewsThe Alaska Pipeline transports oil 800 miles from the North Slope to Valdez, Alaska.
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89 viewsLin Liu and Andy Persekian take a dip during a break from data gathering. (Credit: Kevin Schaefer, NSIDC)
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89 viewsResearchers prepare their snowmobiles during the 2013 Arctic Observing Network (Snownet) field project in Alaska's North Slope.
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