Most viewed - Permafrost Survey 2013
307 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)
296 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)
294 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).
292 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).
284 viewsLin Liu and Andy Persekian check active layer depth measurements on a laptop as Elchin Jafarov looks on. (Credit: Kevin Schaefer, NSIDC)
284 viewsKevin Schaefer drains his mud boots after a day of sloshing through wet tundra. (Kevin Schaefer, NSIDC)
280 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).
276 viewsTundra bugs are always curious about permafrost researchers. (Kevin Schaefer, NSIDC)
274 viewsLin Liu and Andy Persekian take a dip during a break from data gathering. (Credit: Kevin Schaefer, NSIDC)
274 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).
permafrost, nsidc, kevin schaefer, alaska, barrow271 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).
271 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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