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Arctic Buildings18 viewsDue to changes in the ice floe surface, it was not uncommon for camps to relocate to more stable ground. This photograph was taken during the rebuilding of the camp NP-22 in 1980. Aluminum tent poles are at the right, and an overturned boat is at the left. Image credit: EWG.
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Ice Hazards18 viewsA small lead (or crack in the ice) has opened in the foreground. New leads, which form under wind stress when the ice diverges, were a constant threat to the camps. Camps often had to be relocated due to the sudden appearance of an ice lead through the middle of the camp (unless the crack appeared during summer and was simply a melt channel). Image credit: EWG.
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Taking Scientific Measurements19 viewsDetermining instrument location by theodolite. A theodolite is a high-precision surveying instrument. Because the ice floes rotated and changed in topography as they drifted, undergoing freezing and thawing, station members needed to regularly determine the position of the instruments relative to each other and to North. Image credit: EWG.
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Scientific Instruments25 viewsA radio-sounding locator antenna. Image credit: EWG.
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Arctic Sea Ice News & Analysis2672 viewsThis image compares the average sea ice extent for September 2007 to September 2005; the magenta line indicates the long-term median from 1979 to 2000. September 2007 sea ice extent was 4.28 million square kilometers (1.65 million square miles), compared to 5.57 million square kilometers (2.14 million square miles) in September 2005. This image is from the NSIDC Sea Ice Index.
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Allan Hills913 viewsThe Allan Hills are located on the flanks of the TransAntarctic Mountains. Ice upwells onto the hills where combinations of winds and solar insolation cause the ice to quickly ablate. Meteorites that once fell over a large region of East Antarctica have been carried by glacier motion into this small locality.
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AVHRR Spatial Coverage358 viewsAVHRR Spatial Coverage Map of the Northern Hemisphere from the AVHRR Polar 1 km Level-1B Data Set. Blue boxes indicate individual AVHRR scenes for a single day.
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Sea Ice674 viewsArctic sea ice image produced from daily-averaged QuikSCAT sigma-0 measurements from NASA SCP Arctic and Antarctic Ice Extent from QuikSCAT, 1999-2004 Dataset.
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Global Backscatter Data217 viewsGlobal backscatter data derived from ICESat/GLAS Data
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692 viewsOne of the most studied and interesting ice streams in Antarctica, Ice Stream B shows a number of features that indicate past changes and ongoing evolution. In this subscene the upstream ends of several ice stream shear margins are highlighted. Characteristic crevasse patterns, nicknamed "chromosomes," mark the ends of several of these margin traces.
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382 viewsThe hut built by the Scott expedition to Antarctica is located near McMurdo Station.
Image Credit: Ted Scambos, NSIDC
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389 viewsMcMurdo Station is located on the southern tip of Ross Island, on McMurdo Sound in Antarctica.
Image Credit: Ted Scambos, NSIDC
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