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Most viewed - Permafrost Survey 2013
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111 viewsLin Liu and Kevin Schaefer use a metal probe to measure the active layer depth along a survey line near Barrow, Alaska. (Credit: Andy Parsekian)
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105 viewsKevin Schaefer uses a hammer to pound a soil sample tube into the ground near Barrow, Alaska on August 13, 2013. (Credit: Elchin Jafarov, NSIDC).
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102 viewsAndy Persekian, Lin Liu, Elchin Jafarov, and Kevin Schaefer pose next to whale bones at the Welcome to Barrow, Alaska sign. (Credit: Elchin Jafarov, NSIDC)
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95 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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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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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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89 viewsLin Liu and Andy Persekian take a dip during a break from data gathering. (Credit: Kevin Schaefer, NSIDC)
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86 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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85 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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85 viewsAndy Parsekian sets up the ground penetrating radar equipment for a survey of active layer depth near Barrow, Alaska on August 13, 2013. (Credit: Lin Liu).
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84 viewsLin Liu checks the day's data at basecamp. (Credit: Kevin Schaefer, NSIDC)
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