Large fluctuations in speed on Greenland's Jakobshavn Isbræ glacier

  title={Large fluctuations in speed on Greenland's Jakobshavn Isbr{\ae} glacier},
  author={Ian R. Joughin and Waleed Abdalati and Mark A. Fahnestock},
It is important to understand recent changes in the velocity of Greenland glaciers because the mass balance of the Greenland Ice Sheet is partly determined by the flow rates of these outlets. Jakobshavn Isbræ is Greenland's largest outlet glacier, draining about 6.5 per cent of the ice-sheet area, and it has been surveyed repeatedly since 1991 (ref. 2). Here we use remote sensing data to measure the velocity of Jakobshavn Isbræ between 1992 and 2003. We detect large variability of the velocity… 

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