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|a Persistent flow acceleration within the interior of the Greenland ice sheet |h [electronic resource] |y English. |
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|a [S.l.] : |b American Geophysical Union, |c 2011. |
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|a Geophysical Research Letters |y English. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a We present surface velocity measurements from a high-elevation site located 140 km from the
western margin of the Greenland ice sheet, and ~ 50 kminto its accumulation area. Annual velocity increased each year from 51.78 ± 0.01myr-1 in 2009 to 52.92 ± 0.01myr-1 in 2012—a net increase of 2.2%. These data also reveal a strong seasonal velocity cycle of up to 8.1% above the winter mean, driven by seasonal melt and supraglacial lake drainage. Sole et al. (2013) recently argued that ice motion in the ablation area is mediated by reduced winter flow following the development of efficient subglacial drainage during warmer, faster, summers. Our data extend this analysis and reveal a year-on-year increase in annual velocity above the
equilibrium line altitude, where despite surface melt increasing, it is still sufficiently low to hinder the development of efficient drainage under thick ice. |
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|a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|a Fitzpatrick, Andrew A.W.. |
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|a Mikkelsen, Andreas B.. |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15062152/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/21/52/00001/FI15062152_thm.jpg |
