One million years of glaciation and denudation history in west Greenland
The influence of major Quaternary climatic changes on growth and decay of the Greenland Ice Sheet, and associated erosional impact on the landscapes, is virtually unknown beyond the last deglaciation. Here we quantify exposure and denudation histories in west Greenland by applying a novel Markov-Cha...
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ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:55477 2023-05-15T16:23:32+02:00 One million years of glaciation and denudation history in west Greenland Strunk, Astrid Knudsen, Mads Faurschou Egholm, David L. Jansen, John D. Levy, Laura B. Jacobsen, Bo H. Larsen, Nicolaj K. 2017-01-18 https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/55477 https://doi.org/10.1038/ncomms14199 eng eng https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/55477 https://doi.org/10.1038/ncomms14199 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/closedAccess CC-BY ddc:550 Institut für Umweltwissenschaften und Geographie article doc-type:article 2017 ftubpotsdam https://doi.org/10.1038/ncomms14199 2022-08-21T22:37:10Z The influence of major Quaternary climatic changes on growth and decay of the Greenland Ice Sheet, and associated erosional impact on the landscapes, is virtually unknown beyond the last deglaciation. Here we quantify exposure and denudation histories in west Greenland by applying a novel Markov-Chain Monte Carlo modelling approach to all available paired cosmogenic Be-10-Al-26 bedrock data from Greenland. We find that long-term denudation rates in west Greenland range from >50 m Myr(-1) in low-lying areas to similar to 2 m Myr(-1) at high elevations, hereby quantifying systematic variations in denudation rate among different glacial landforms caused by variations in ice thickness across the landscape. We furthermore show that the present day ice-free areas only were ice covered ca. 45% of the past 1 million years, and even less at high-elevation sites, implying that the Greenland Ice Sheet for much of the time was of similar size or even smaller than today. Article in Journal/Newspaper Greenland Ice Sheet University of Potsdam: publish.UP Greenland Nature Communications 8 1 |
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University of Potsdam: publish.UP |
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ftubpotsdam |
language |
English |
topic |
ddc:550 Institut für Umweltwissenschaften und Geographie |
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ddc:550 Institut für Umweltwissenschaften und Geographie Strunk, Astrid Knudsen, Mads Faurschou Egholm, David L. Jansen, John D. Levy, Laura B. Jacobsen, Bo H. Larsen, Nicolaj K. One million years of glaciation and denudation history in west Greenland |
topic_facet |
ddc:550 Institut für Umweltwissenschaften und Geographie |
description |
The influence of major Quaternary climatic changes on growth and decay of the Greenland Ice Sheet, and associated erosional impact on the landscapes, is virtually unknown beyond the last deglaciation. Here we quantify exposure and denudation histories in west Greenland by applying a novel Markov-Chain Monte Carlo modelling approach to all available paired cosmogenic Be-10-Al-26 bedrock data from Greenland. We find that long-term denudation rates in west Greenland range from >50 m Myr(-1) in low-lying areas to similar to 2 m Myr(-1) at high elevations, hereby quantifying systematic variations in denudation rate among different glacial landforms caused by variations in ice thickness across the landscape. We furthermore show that the present day ice-free areas only were ice covered ca. 45% of the past 1 million years, and even less at high-elevation sites, implying that the Greenland Ice Sheet for much of the time was of similar size or even smaller than today. |
format |
Article in Journal/Newspaper |
author |
Strunk, Astrid Knudsen, Mads Faurschou Egholm, David L. Jansen, John D. Levy, Laura B. Jacobsen, Bo H. Larsen, Nicolaj K. |
author_facet |
Strunk, Astrid Knudsen, Mads Faurschou Egholm, David L. Jansen, John D. Levy, Laura B. Jacobsen, Bo H. Larsen, Nicolaj K. |
author_sort |
Strunk, Astrid |
title |
One million years of glaciation and denudation history in west Greenland |
title_short |
One million years of glaciation and denudation history in west Greenland |
title_full |
One million years of glaciation and denudation history in west Greenland |
title_fullStr |
One million years of glaciation and denudation history in west Greenland |
title_full_unstemmed |
One million years of glaciation and denudation history in west Greenland |
title_sort |
one million years of glaciation and denudation history in west greenland |
publishDate |
2017 |
url |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/55477 https://doi.org/10.1038/ncomms14199 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/index/index/docId/55477 https://doi.org/10.1038/ncomms14199 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/closedAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms14199 |
container_title |
Nature Communications |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766011789077643264 |