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KS_0512.jpg
181 viewsThe Alaska pipeline follows the Dalton Highway in the Brooks Range in this photo taken on August 15, 2012. The pipeline connects the oil fields at Prudhoe Bay with the tanker facilities in Valdez, a distance of over 800 miles. (Credit: Kevin Schaefer, NSIDC)
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181 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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181 viewsLin Liu and Andy Persekian take a dip during a break from data gathering. (Credit: Kevin Schaefer, NSIDC)
KS_1260.jpg
181 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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181 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.
TS_03_7HailCluster.jpg
180 viewsA detailed image of hail after it has clustered together.
Photo Credit: NSIDC Courtesy Erica Key
KS_0648.jpg
179 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)
AIDJEX1972_070.jpg
178 viewsMurray Stateman AIDJEX 1972 pilot study
Image Credit: National Snow & Ice Data Center
AIDJEX Web site
EJ_0088.jpg
permafrost, nsidc, kevin schaefer, alaska, barrow178 viewsAndy Parsekian, Kevin Schaefer, and Lin Liu use a ground penetrating radar to measure the depth of an ice wedge on August 15, 2013. The survey line lies perpendicular to the ice wedge and similar ice wedges crisscross the tundra in the background (Credit: Elchin Jafarov, NSIDC).
EJ_0893.jpg
permafrost, nsidc, kevin schaefer, alaska, barrow178 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).
TS_03_9WineglassBay.jpg
178 viewsWineglass Bay of Tasmania, Australia, after the return from the Aurora Australis
Photo Credit: Courtesy Ted Scambos, NSIDC
AIDJEX1972_065.jpg
177 viewsKen Hunkins AIDJEX 1972 pilot study.
Image Credit: National Snow & Ice Data Center
AIDJEX Web site
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