Shear margins in upper half of Northeast Greenland Ice Stream were established two millennia ago
Abstract Only a few localised ice streams drain most of the ice from the Greenland Ice Sheet. Thus, understanding ice stream behaviour and its temporal variability is crucially important to predict future sea-level change. The interior trunk of the 700 km-long North-East Greenland Ice Stream (NEGIS)...
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ftdoajarticles:oai:doaj.org/article:b9fee28e06734e99a011c16d4228042e 2024-09-15T18:04:18+00:00 Shear margins in upper half of Northeast Greenland Ice Stream were established two millennia ago Daniela Jansen Steven Franke Catherine C. Bauer Tobias Binder Dorthe Dahl-Jensen Jan Eichler Olaf Eisen Yuanbang Hu Johanna Kerch Maria-Gema Llorens Heinrich Miller Niklas Neckel John Paden Tamara de Riese Till Sachau Nicolas Stoll Ilka Weikusat Frank Wilhelms Yu Zhang Paul D. Bons 2024-02-01T00:00:00Z https://doi.org/10.1038/s41467-024-45021-8 https://doaj.org/article/b9fee28e06734e99a011c16d4228042e EN eng Nature Portfolio https://doi.org/10.1038/s41467-024-45021-8 https://doaj.org/toc/2041-1723 doi:10.1038/s41467-024-45021-8 2041-1723 https://doaj.org/article/b9fee28e06734e99a011c16d4228042e Nature Communications, Vol 15, Iss 1, Pp 1-12 (2024) Science Q article 2024 ftdoajarticles https://doi.org/10.1038/s41467-024-45021-8 2024-08-05T17:49:52Z Abstract Only a few localised ice streams drain most of the ice from the Greenland Ice Sheet. Thus, understanding ice stream behaviour and its temporal variability is crucially important to predict future sea-level change. The interior trunk of the 700 km-long North-East Greenland Ice Stream (NEGIS) is remarkable due to the lack of any clear bedrock channel to explain its presence. Here, we present a 3-dimensional analysis of the folding and advection of its stratigraphic horizons, which shows that the localised flow and shear margins in the upper NEGIS were fully developed only ca 2000 years ago. Our results contradict the assumption that the ice stream has been stable throughout the Holocene in its current form and show that upper NEGIS-type development of ice streaming, with distinct shear margins and no bed topography relationship, can be established on time scales of hundreds of years, which is a major challenge for realistic mass-balance and sea-level rise projections. Article in Journal/Newspaper East Greenland Greenland Ice Sheet Directory of Open Access Journals: DOAJ Articles Nature Communications 15 1 |
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ftdoajarticles |
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English |
topic |
Science Q |
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Science Q Daniela Jansen Steven Franke Catherine C. Bauer Tobias Binder Dorthe Dahl-Jensen Jan Eichler Olaf Eisen Yuanbang Hu Johanna Kerch Maria-Gema Llorens Heinrich Miller Niklas Neckel John Paden Tamara de Riese Till Sachau Nicolas Stoll Ilka Weikusat Frank Wilhelms Yu Zhang Paul D. Bons Shear margins in upper half of Northeast Greenland Ice Stream were established two millennia ago |
topic_facet |
Science Q |
description |
Abstract Only a few localised ice streams drain most of the ice from the Greenland Ice Sheet. Thus, understanding ice stream behaviour and its temporal variability is crucially important to predict future sea-level change. The interior trunk of the 700 km-long North-East Greenland Ice Stream (NEGIS) is remarkable due to the lack of any clear bedrock channel to explain its presence. Here, we present a 3-dimensional analysis of the folding and advection of its stratigraphic horizons, which shows that the localised flow and shear margins in the upper NEGIS were fully developed only ca 2000 years ago. Our results contradict the assumption that the ice stream has been stable throughout the Holocene in its current form and show that upper NEGIS-type development of ice streaming, with distinct shear margins and no bed topography relationship, can be established on time scales of hundreds of years, which is a major challenge for realistic mass-balance and sea-level rise projections. |
format |
Article in Journal/Newspaper |
author |
Daniela Jansen Steven Franke Catherine C. Bauer Tobias Binder Dorthe Dahl-Jensen Jan Eichler Olaf Eisen Yuanbang Hu Johanna Kerch Maria-Gema Llorens Heinrich Miller Niklas Neckel John Paden Tamara de Riese Till Sachau Nicolas Stoll Ilka Weikusat Frank Wilhelms Yu Zhang Paul D. Bons |
author_facet |
Daniela Jansen Steven Franke Catherine C. Bauer Tobias Binder Dorthe Dahl-Jensen Jan Eichler Olaf Eisen Yuanbang Hu Johanna Kerch Maria-Gema Llorens Heinrich Miller Niklas Neckel John Paden Tamara de Riese Till Sachau Nicolas Stoll Ilka Weikusat Frank Wilhelms Yu Zhang Paul D. Bons |
author_sort |
Daniela Jansen |
title |
Shear margins in upper half of Northeast Greenland Ice Stream were established two millennia ago |
title_short |
Shear margins in upper half of Northeast Greenland Ice Stream were established two millennia ago |
title_full |
Shear margins in upper half of Northeast Greenland Ice Stream were established two millennia ago |
title_fullStr |
Shear margins in upper half of Northeast Greenland Ice Stream were established two millennia ago |
title_full_unstemmed |
Shear margins in upper half of Northeast Greenland Ice Stream were established two millennia ago |
title_sort |
shear margins in upper half of northeast greenland ice stream were established two millennia ago |
publisher |
Nature Portfolio |
publishDate |
2024 |
url |
https://doi.org/10.1038/s41467-024-45021-8 https://doaj.org/article/b9fee28e06734e99a011c16d4228042e |
genre |
East Greenland Greenland Ice Sheet |
genre_facet |
East Greenland Greenland Ice Sheet |
op_source |
Nature Communications, Vol 15, Iss 1, Pp 1-12 (2024) |
op_relation |
https://doi.org/10.1038/s41467-024-45021-8 https://doaj.org/toc/2041-1723 doi:10.1038/s41467-024-45021-8 2041-1723 https://doaj.org/article/b9fee28e06734e99a011c16d4228042e |
op_doi |
https://doi.org/10.1038/s41467-024-45021-8 |
container_title |
Nature Communications |
container_volume |
15 |
container_issue |
1 |
_version_ |
1810441808534044672 |