Palmer, Steven J; Shepherd, Andrew; Nienow, Peter; Joughin, Ian (2011): (Table 1) Basin area, average late-summer speedup, number of sinks and runoff of West Greenland Ice Sheet catchments [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.817850, Supplement to: Palmer, SJ et al. (2011): Seasonal speedup of the Greenland Ice Sheet linked to routing of surface water. Earth and Planetary Science Letters, 302(3-4), 423-428, https://doi.org/10.1016/j.epsl.2010.12.037
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Abstract:
We use interferometric synthetic aperture radar observations recorded in a land-terminating sector of western Greenland to characterise the ice sheet surface hydrology and to quantify spatial variations in the seasonality of ice sheet flow. Our data reveal a non-uniform pattern of late-summer ice speedup that, in places, extends over 100 km inland. We show that the degree of late-summer speedup is positively correlated with modelled runoff within the 10 glacier catchments of our survey, and that the pattern of late-summer speedup follows that of water routed at the ice sheet surface. In late-summer, ice within the largest catchment flows on average 48% faster than during winter, whereas changes in smaller catchments are less pronounced. Our observations show that the routing of seasonal runoff at the ice sheet surface plays an important role in shaping the magnitude and extent of seasonal ice sheet speedup.
Project(s):
Coverage:
Median Latitude: 67.255700 * Median Longitude: -49.406700 * South-bound Latitude: 66.962000 * West-bound Longitude: -49.837000 * North-bound Latitude: 67.514000 * East-bound Longitude: -48.929000
Event(s):
WGreenland_AKN (Akuliaruserssuq north) * Latitude: 67.334000 * Longitude: -49.098000 * Location: West Greenland * Method/Device: Satellite remote sensing (SAT)
Comment:
Positions of catchments approximate. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Name | Name | Palmer, Steven J | of catchment | ||
| 5 | Area | Area | km2 | Palmer, Steven J | ||
| 6 | Percentage | Perc | % | Palmer, Steven J | of late-summer speedup | |
| 7 | Number | No | Palmer, Steven J | of sinks | ||
| 8 | Runoff | Runoff | 106 m3 | Palmer, Steven J | accumulated during the 5 days preceding the late-summer velocity observations |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
50 data points