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S.B. Nielsen

Widespread erosion on high plateaus during recent glaciations in Scandinavia

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Widespread erosion on high plateaus during recent glaciations in Scandinavia. / Andersen, Jane L.; Egholm, David L.; Knudsen, Mads F.; Linge, Henriette; Jansen, John D.; Pedersen, Vivi K.; Nielsen, Soren B.; Tikhomirov, Dmitry; Olsen, Jesper; Fabel, Derek; Xu, Sheng.

In: Nature Communications, Vol. 9, 830, 26.02.2018.

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@article{d148128794db4e0c899899d3abcb1bd9,
title = "Widespread erosion on high plateaus during recent glaciations in Scandinavia",
abstract = "Glaciers create some of Earth's steepest topography; yet, many areas that were repeatedly overridden by ice sheets in the last few million years include extensive plateaus. The distinct geomorphic contrast between plateaus and the glacial troughs that dissect them has sustained two long-held hypotheses: first, that ice sheets perform insignificant erosion beyond glacial troughs, and, second, that the plateaus represent ancient pre-glacial landforms bearing information of tectonic and geomorphic history prior to Pliocene-Pleistocene global cooling (similar to 3.5 Myr ago). Here we show that the Fennoscandian ice sheets drove widespread erosion across plateaus far beyond glacial troughs. We apply inverse modelling to 118 new cosmogenic Be-10 and Al-26 measurements to quantify ice sheet erosion on the plateaus fringing the Sognefjorden glacial trough in western Norway. Our findings demonstrate substantial modification of the pre-glacial landscape during the Quaternary, and that glacial erosion of plateaus is important when estimating the global sediment flux to the oceans.",
keywords = "FENNOSCANDIAN ICE-SHEET, BE-10 EXPOSURE AGES, CLIMATE-CHANGE, LANDSCAPE EVOLUTION, COSMOGENIC NUCLIDES, WESTERN NORWAY, AMS STANDARDS, RATES, SEDIMENT, SURFACES",
author = "Andersen, {Jane L.} and Egholm, {David L.} and Knudsen, {Mads F.} and Henriette Linge and Jansen, {John D.} and Pedersen, {Vivi K.} and Nielsen, {Soren B.} and Dmitry Tikhomirov and Jesper Olsen and Derek Fabel and Sheng Xu",
year = "2018",
month = "2",
day = "26",
doi = "10.1038/s41467-018-03280-2",
language = "English",
volume = "9",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",

}

RIS

TY - JOUR

T1 - Widespread erosion on high plateaus during recent glaciations in Scandinavia

AU - Andersen, Jane L.

AU - Egholm, David L.

AU - Knudsen, Mads F.

AU - Linge, Henriette

AU - Jansen, John D.

AU - Pedersen, Vivi K.

AU - Nielsen, Soren B.

AU - Tikhomirov, Dmitry

AU - Olsen, Jesper

AU - Fabel, Derek

AU - Xu, Sheng

PY - 2018/2/26

Y1 - 2018/2/26

N2 - Glaciers create some of Earth's steepest topography; yet, many areas that were repeatedly overridden by ice sheets in the last few million years include extensive plateaus. The distinct geomorphic contrast between plateaus and the glacial troughs that dissect them has sustained two long-held hypotheses: first, that ice sheets perform insignificant erosion beyond glacial troughs, and, second, that the plateaus represent ancient pre-glacial landforms bearing information of tectonic and geomorphic history prior to Pliocene-Pleistocene global cooling (similar to 3.5 Myr ago). Here we show that the Fennoscandian ice sheets drove widespread erosion across plateaus far beyond glacial troughs. We apply inverse modelling to 118 new cosmogenic Be-10 and Al-26 measurements to quantify ice sheet erosion on the plateaus fringing the Sognefjorden glacial trough in western Norway. Our findings demonstrate substantial modification of the pre-glacial landscape during the Quaternary, and that glacial erosion of plateaus is important when estimating the global sediment flux to the oceans.

AB - Glaciers create some of Earth's steepest topography; yet, many areas that were repeatedly overridden by ice sheets in the last few million years include extensive plateaus. The distinct geomorphic contrast between plateaus and the glacial troughs that dissect them has sustained two long-held hypotheses: first, that ice sheets perform insignificant erosion beyond glacial troughs, and, second, that the plateaus represent ancient pre-glacial landforms bearing information of tectonic and geomorphic history prior to Pliocene-Pleistocene global cooling (similar to 3.5 Myr ago). Here we show that the Fennoscandian ice sheets drove widespread erosion across plateaus far beyond glacial troughs. We apply inverse modelling to 118 new cosmogenic Be-10 and Al-26 measurements to quantify ice sheet erosion on the plateaus fringing the Sognefjorden glacial trough in western Norway. Our findings demonstrate substantial modification of the pre-glacial landscape during the Quaternary, and that glacial erosion of plateaus is important when estimating the global sediment flux to the oceans.

KW - FENNOSCANDIAN ICE-SHEET

KW - BE-10 EXPOSURE AGES

KW - CLIMATE-CHANGE

KW - LANDSCAPE EVOLUTION

KW - COSMOGENIC NUCLIDES

KW - WESTERN NORWAY

KW - AMS STANDARDS

KW - RATES

KW - SEDIMENT

KW - SURFACES

U2 - 10.1038/s41467-018-03280-2

DO - 10.1038/s41467-018-03280-2

M3 - Journal article

C2 - 29483526

VL - 9

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 830

ER -