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65 viewsSnowmobiles stand by at field camp during the 2013 Arctic Observing Network (Snownet) project in Alaska's North Slope.
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64 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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64 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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61 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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61 viewsLin Liu and Andy Persekian take a dip during a break from data gathering. (Credit: Kevin Schaefer, NSIDC)
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60 viewsKevin Schaefer drains his mud boots after a day of sloshing through wet tundra. (Kevin Schaefer, NSIDC)
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59 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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58 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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58 viewsTundra bugs are always curious about permafrost researchers. (Kevin Schaefer, NSIDC)
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57 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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56 viewsDriving the Dalton Highway on August 15, 2012 becomes difficult as visibility drops to zero on Atigun Pass in the Brooks Range, Alaska. (Credit: Kevin Schaefer, NSIDC)
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56 viewsTim Schaefer slakes his thirst with ice chopped from an exposed ice layer at a thermokarst feature on August 19, 2012 near Toolik Lake, Alaska. (Credit: Kevin Schaefer, NSIDC)
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