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Most viewed - Permafrost Survey 2009
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104 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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90 viewsStandford University scientist Lin Liu and research volunteer Tim Schaefer are attempting to remove a drill bit that accidently froze into the permafrost at a site just south of Deadhorse, Alaska on July 11, 2009. The researchers spent eight hours chipping the drill bit out of the permafrost using a crowbar, pry bar, and a hammer (Credit: Kevin Schaefer, NSIDC)
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88 viewsResearch volunteer Tim Schaefer, Standford University scientist Lin Liu, and NSIDC senior research scientist Tingjun Zhang drill a permafrost sample south of Deadhorse, Alaska on July 10, 2009. The head nets protect the researchers from the clouds of mosquitoes that continually swarmed around them. (Credit: Kevin Schaefer, NSIDC)
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88 viewsStandford University scientist Lin Liu, NSIDC senior research scientist Tingjun Zhang, and research volunteer Tim Schaefer pull the auger bit containing a permafrost core out of a newly drilled hole near Deadhorse, Alaska on July 10, 2009. (Credit: Kevin Schaefer, NSIDC)
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88 viewsThis picture taken on July 13, 2009 shows a typical borehole after collecting a permafrost core sample. The ice and soil shavings that result from the auger bit used to drill the core sample have a look and consistency of wet concrete (Credit: Kevin Schaefer, NSIDC).
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88 viewsOn the 2009 trip to drill permafrost samples, the researchers’ truck was so loaded with equipment that retrieving anything required a headlong dive into the back. Here, Standford University scientist Lin Liu dives into the truck to retrieve his toothbrush in the morning. (Credit: Kevin Schaefer, NSIDC)
   
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