Destabilization of the Northeast Greenland Ice Stream

N. J. Korsgaard, Shfaqat Abbas Khan, K. H. Kjaer, M. G. Bevis, J. L. Bamber, K. K. Kjeldsen, A. A. Bjork, J. M. Wahr, L. A. Sterns, M. R. van den Broeke, Ioana Stefania Muresan, N. K. Larsen

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Abstract

The Greenland Ice Sheet (GrIS) has been one of the largest contributors to global sea level rise over the last 20 years, accounting for c. 0.5 of a total of c. 3.2 mm yr-1. A significant portion of this contribution is associated with the speed up of glaciers in southeast and northwest Greenland.

Here, we reveal that the Northeast Greenland Ice Stream (NEGIS), which extends more than 600 km into the interior of the ice sheet, is now undergoing dynamic thinning after more than a quarter of a century of stability. This sector of the GrIS is of particular interest in sea level projections, because the glacier flows into a large submarine basin with a negative bed slope near the grounding line.

Our findings unfold the next step in mass loss of the GrIS as we show a heightened risk of rapid sustained loss from Northeast Greenland on top of the thinning in Southeast and Northwestern Greenland.
Original languageEnglish
Publication date2013
Number of pages1
Publication statusPublished - 2013
EventAGU Fall Meeting 2013 - San Francisco, United States
Duration: 9 Dec 201313 Dec 2013

Conference

ConferenceAGU Fall Meeting 2013
CountryUnited States
CitySan Francisco
Period09/12/201313/12/2013

Cite this

Korsgaard, N. J., Khan, S. A., Kjaer, K. H., Bevis, M. G., Bamber, J. L., Kjeldsen, K. K., ... Larsen, N. K. (2013). Destabilization of the Northeast Greenland Ice Stream. Abstract from AGU Fall Meeting 2013, San Francisco, United States.