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permafrost, nsidc, kevin schaefer, alaska, barrow122 viewsKevin Schaefer walks along the road to a next survey site near Barrow Alaska on August 11, 2013. Contrary to what the sign says, the effective speed limit was actually 5 mph (Credit: Elchin Jafarov, NSIDC).
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122 viewsLin Liu pulls a ground penetrating radar unit through the tundra in rainy weather as Andy Persekian and Elchin Jafarov follow behind. The survey near Barrow, Alaska measures active layer depth. The radar unit (in the box) emits a pulse which reflects off the permafrost to measure the active layer depth, which is recorded in the computer held by Andy Parsekian. (Credit: Kevin Schaefer, NSIDC)
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122 viewsLin Liu pulls a ground penetrating radar unit through the tundra in rainy weather. The survey near Barrow, Alaska measures active layer depth. The radar unit (in the box) emits a pulse which reflects off the permafrost to measure the active layer depth, which is recorded in the computer held by Andy Parsekian. (Credit: Kevin Schaefer, NSIDC)
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122 viewsSnowmobiles stand by at field camp during the 2013 Arctic Observing Network (Snownet) project in Alaska's North Slope.
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122 viewsA researcher's winter gloves provide a sense of scale to sastrugi, sharp irregular grooves or ridges formed on a snow surface by wind erosion, seen during the 2013 Arctic Observing Network (Snownet) project.
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122 viewsAn aerial artistic image taken by Dr. Tony Worby.
Photo Credit: NSIDC Courtesy Tony Worby
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122 viewsThe team is about to depart in the AS350 Squirrel helicopter.
Photo Credit: Courtesy Ted Scambos, NSIDC
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122 viewsTerry Haran, finally back on land, crawling out of Wineglass Bay after such a long journey.
Photo Credit: Courtesy Ted Scambos, NSIDC
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121 viewsIn this photo taken on August 16, 2012, Tim Schaefer, Lin Liu, Alessio Gusmeroli, and Tingjun Zhang cook food and examine the day’s observations of active layer depth at camp just south of Deadhorse, Alaska. (Credit: Kevin Schaefer, NSIDC)
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121 viewsSmall ices lenses are common in permafrost, as seen in this typical permafrost core drilled near Deadhorse, Alaska on August 17, 2012. (Credit: Kevin Schaefer, NSIDC)
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121 viewsLin Liu pulls a ground penetrating radar unit through the tundra near Barrow, Alaska on to measure the active layer depth. The radar unit (in the box) emits a pulse which reflects off the permafrost to measure the active layer depth, which is recorded in the computer held by Andy Parsekian. (Credit: Kevin Schaefer, NSIDC)
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121 viewsLin Liu and Andy Persekian take a dip during a break from data gathering. (Credit: Kevin Schaefer, NSIDC)
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