W Krabill

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Recent aircraft and satellite laser altimeter surveys of the Amundsen Sea sector of West Antarctica show that local glaciers are discharging about 250 cubic kilometers of ice per year to the ocean, almost 60% more than is accumulated within their catchment basins. This discharge is sufficient to raise sea level by more than 0.2 millimeters per year. Glacier(More)
[1] Interferometric synthetic-aperture radar data collected by ERS-1/2 and Radarsat-1 satellites show that Antarctic Peninsula glaciers sped up significantly following the collapse of Larsen B ice shelf in 2002. Hektoria, Green and Evans glaciers accelerated eightfold between 2000 and 2003 and decelerated moderately in 2003. Jorum and Crane glaciers(More)
6. Accumulation estimates from recent cores were provided by R. Bales, pending completion of a paper updating the accumulation map for Greenland. 7. C. Davis, personal communication. 8. Values of T north of latitude 70°N shown in Fig. 3 are about 4 cm/year lower than our earlier estimates (2), reflecting improvement in estimates of snow-accumulation rates(More)
[1] Satellite radar interferometry data from 1995 to 2004, and airborne ice thickness data from 2002, reveal that the glaciers flowing into former Wordie Ice Shelf, West Antarctic Peninsula, discharge 6.8 ± 0.3 km 3 /yr of ice, which is 84 ± 30 percent larger than a snow accumulation of 3.7 ± 0.8 km 3 /yr over a 6,300 km 2 drainage basin. Airborne and(More)
Recent observations have shown that the periphery of the Greenland ice sheet (GrIS) is thinning rapidly and that this thinning is greatest around marine-terminating outlet glaciers. Several theories have been proposed which provide a link between climate and ice thinning. We present surface elevation change (dh/dt) data from NASA's Program for Arctic(More)
  • W Krabill, J Sonntag, S Manizade, E Fredrick, J Yungel, E Hanna +18 others
  • 2010
The Arctic Ice Mapping group (Project AIM) at the NASA Goddard Space Flight Center Wallops Flight Facility has been conducting systematic topographic surveys of the Greenland Ice Sheet (GIS) since 1993, using scanning airborne laser altimeters (NASA ATM) combined with Global Positioning System (GPS) technology. In 2009, with ICESat I nearing its operational(More)
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