NEGIS - A unique feature in Greenland?


Contact
steven.franke [ at ] awi.de

Abstract

Reliable knowledge of ice discharge dynamics for the Greenland Ice Sheet via its ice streams is essential if we are to understand its stability under future climate scenarios. Little however is known about the paleo ice-sheet configuration in areas still covered by ice. Here we use radio-echo sounding data to decipher the regional deformation history of the north-eastern Greenland Ice Sheet from its internal stratigraphy. We map folds deep below the surface that we attribute to the activity of a now-extinct ice stream, which shows strong similarities to the Northeast Greenland Ice Stream. We propose that locally this ancient ice flow regime reached much further inland than today’s and was ceased in the Holocene. The new insight that major ice streams may abruptly disappear will affect future approaches to understanding and modelling the response of Earth’s ice sheets to global warming.



Item Type
Conference (Invited talk)
Authors
Divisions
Primary Division
Programs
Primary Topic
Helmholtz Cross Cutting Activity (2021-2027)
N/A
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
EastGRIP International Spring Seminar Series (EISSS) 2022, 01 Mar 2022 - 01 Apr 2022, Online.
Eprint ID
55882
Cite as
Franke, S. , Bons, P. D. , Westhoff, J. , Weikusat, I. , Binder, T. , Streng, K. , Steinhage, D. , Helm, V. , Eisen, O. , Paden, J. , Eagles, G. and Jansen, D. (2022): NEGIS - A unique feature in Greenland? , EastGRIP International Spring Seminar Series (EISSS) 2022, Online, March 2022 - April 2022 .


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Research Platforms

Campaigns
POLAR 6 > P6_211_EGRIP_NOR_2018
POLAR 6 > P6_211_RESURV79_2018


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