Holocene ice marginal fluctuations of the Qassimiut lobe in South Greenland
Knowledge about the Holocene evolution of the Greenland ice sheet (GrIS) is important to put the recent observations of ice loss into a longer-term perspective. In this study, we use six new threshold lake records supplemented with two existing lake records to reconstruct the Holocene ice marginal f...
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ftuniaarhuspubl:oai:pure.atira.dk:publications/50d67d22-58a6-4643-b8fc-8ba5972b5692 2023-12-31T10:07:07+01:00 Holocene ice marginal fluctuations of the Qassimiut lobe in South Greenland Larsen, Nicolaj K. Find, Jesper Kristensen, Anders Bjørk, Anders A. Kjeldsen, Kristian K. Odgaard, Bent V. Olsen, Jesper Kjær, Kurt H. 2016-03-04 https://pure.au.dk/portal/da/publications/holocene-ice-marginal-fluctuations-of-the-qassimiut-lobe-in-south-greenland(50d67d22-58a6-4643-b8fc-8ba5972b5692).html https://doi.org/10.1038/srep22362 eng eng https://pure.au.dk/portal/da/publications/holocene-ice-marginal-fluctuations-of-the-qassimiut-lobe-in-south-greenland(50d67d22-58a6-4643-b8fc-8ba5972b5692).html info:eu-repo/semantics/openAccess Larsen , N K , Find , J , Kristensen , A , Bjørk , A A , Kjeldsen , K K , Odgaard , B V , Olsen , J & Kjær , K H 2016 , ' Holocene ice marginal fluctuations of the Qassimiut lobe in South Greenland ' , Scientific Reports , vol. 6 , 22362 . https://doi.org/10.1038/srep22362 article 2016 ftuniaarhuspubl https://doi.org/10.1038/srep22362 2023-12-07T00:01:26Z Knowledge about the Holocene evolution of the Greenland ice sheet (GrIS) is important to put the recent observations of ice loss into a longer-term perspective. In this study, we use six new threshold lake records supplemented with two existing lake records to reconstruct the Holocene ice marginal fluctuations of the Qassimiut lobe (QL) - one of the most dynamic parts of the GrIS in South Greenland. Times when the ice margin was close to present extent are characterized by clastic input from the glacier meltwater, whereas periods when the ice margin was behind its present day extent comprise organic-rich sediments. We find that the overall pattern suggests that the central part of the ice lobe in low-lying areas experienced the most prolonged ice retreat from ~9-0.4 cal. ka BP, whereas the more distal parts of the ice lobe at higher elevation re-advanced and remained close to the present extent during the Neoglacial between ~4.4 and 1.8 cal. ka BP. These results demonstrate that the QL was primarily driven by Holocene climate changes, but also emphasises the role of local topography on the ice marginal fluctuations. Article in Journal/Newspaper glacier Greenland Ice Sheet Qassimiut Aarhus University: Research Scientific Reports 6 1 |
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Open Polar |
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Aarhus University: Research |
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ftuniaarhuspubl |
language |
English |
description |
Knowledge about the Holocene evolution of the Greenland ice sheet (GrIS) is important to put the recent observations of ice loss into a longer-term perspective. In this study, we use six new threshold lake records supplemented with two existing lake records to reconstruct the Holocene ice marginal fluctuations of the Qassimiut lobe (QL) - one of the most dynamic parts of the GrIS in South Greenland. Times when the ice margin was close to present extent are characterized by clastic input from the glacier meltwater, whereas periods when the ice margin was behind its present day extent comprise organic-rich sediments. We find that the overall pattern suggests that the central part of the ice lobe in low-lying areas experienced the most prolonged ice retreat from ~9-0.4 cal. ka BP, whereas the more distal parts of the ice lobe at higher elevation re-advanced and remained close to the present extent during the Neoglacial between ~4.4 and 1.8 cal. ka BP. These results demonstrate that the QL was primarily driven by Holocene climate changes, but also emphasises the role of local topography on the ice marginal fluctuations. |
format |
Article in Journal/Newspaper |
author |
Larsen, Nicolaj K. Find, Jesper Kristensen, Anders Bjørk, Anders A. Kjeldsen, Kristian K. Odgaard, Bent V. Olsen, Jesper Kjær, Kurt H. |
spellingShingle |
Larsen, Nicolaj K. Find, Jesper Kristensen, Anders Bjørk, Anders A. Kjeldsen, Kristian K. Odgaard, Bent V. Olsen, Jesper Kjær, Kurt H. Holocene ice marginal fluctuations of the Qassimiut lobe in South Greenland |
author_facet |
Larsen, Nicolaj K. Find, Jesper Kristensen, Anders Bjørk, Anders A. Kjeldsen, Kristian K. Odgaard, Bent V. Olsen, Jesper Kjær, Kurt H. |
author_sort |
Larsen, Nicolaj K. |
title |
Holocene ice marginal fluctuations of the Qassimiut lobe in South Greenland |
title_short |
Holocene ice marginal fluctuations of the Qassimiut lobe in South Greenland |
title_full |
Holocene ice marginal fluctuations of the Qassimiut lobe in South Greenland |
title_fullStr |
Holocene ice marginal fluctuations of the Qassimiut lobe in South Greenland |
title_full_unstemmed |
Holocene ice marginal fluctuations of the Qassimiut lobe in South Greenland |
title_sort |
holocene ice marginal fluctuations of the qassimiut lobe in south greenland |
publishDate |
2016 |
url |
https://pure.au.dk/portal/da/publications/holocene-ice-marginal-fluctuations-of-the-qassimiut-lobe-in-south-greenland(50d67d22-58a6-4643-b8fc-8ba5972b5692).html https://doi.org/10.1038/srep22362 |
genre |
glacier Greenland Ice Sheet Qassimiut |
genre_facet |
glacier Greenland Ice Sheet Qassimiut |
op_source |
Larsen , N K , Find , J , Kristensen , A , Bjørk , A A , Kjeldsen , K K , Odgaard , B V , Olsen , J & Kjær , K H 2016 , ' Holocene ice marginal fluctuations of the Qassimiut lobe in South Greenland ' , Scientific Reports , vol. 6 , 22362 . https://doi.org/10.1038/srep22362 |
op_relation |
https://pure.au.dk/portal/da/publications/holocene-ice-marginal-fluctuations-of-the-qassimiut-lobe-in-south-greenland(50d67d22-58a6-4643-b8fc-8ba5972b5692).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/srep22362 |
container_title |
Scientific Reports |
container_volume |
6 |
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1 |
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1786839364233330688 |