A Younger Dryas re-advance of local glaciers in north Greenland
The Younger Dryas (YD) is a well-constrained cold event from 12,900 to 11,700 years ago but it remains unclear how the cooling and subsequent abrupt warming recorded in ice cores was translated into ice margin fluctuations in Greenland. Here we present 10 Be surface exposure ages from three moraines...
Published in: | Quaternary Science Reviews |
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2016
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ftuniaarhuspubl:oai:pure.atira.dk:publications/4d8db377-3e1e-477b-9b32-0db92b732e9a 2023-12-31T10:04:06+01:00 A Younger Dryas re-advance of local glaciers in north Greenland Larsen, Nicolaj K. Funder, Svend Linge, Henriette Möller, Per Schomacker, Anders Fabel, Derek Xu, Sheng Kjær, Kurt H. 2016-09-01 https://pure.au.dk/portal/da/publications/a-younger-dryas-readvance-of-local-glaciers-in-north-greenland(4d8db377-3e1e-477b-9b32-0db92b732e9a).html https://doi.org/10.1016/j.quascirev.2015.10.036 eng eng https://pure.au.dk/portal/da/publications/a-younger-dryas-readvance-of-local-glaciers-in-north-greenland(4d8db377-3e1e-477b-9b32-0db92b732e9a).html info:eu-repo/semantics/restrictedAccess Larsen , N K , Funder , S , Linge , H , Möller , P , Schomacker , A , Fabel , D , Xu , S & Kjær , K H 2016 , ' A Younger Dryas re-advance of local glaciers in north Greenland ' , Quaternary Science Reviews , vol. 147 , pp. 47-58 . https://doi.org/10.1016/j.quascirev.2015.10.036 Greenland ice sheet Ice marginal fluctuations Surface exposure dating Younger Dryas article 2016 ftuniaarhuspubl https://doi.org/10.1016/j.quascirev.2015.10.036 2023-12-07T00:01:16Z The Younger Dryas (YD) is a well-constrained cold event from 12,900 to 11,700 years ago but it remains unclear how the cooling and subsequent abrupt warming recorded in ice cores was translated into ice margin fluctuations in Greenland. Here we present 10 Be surface exposure ages from three moraines in front of local glaciers on a 50 km stretch along the north coast of Greenland, facing the Arctic Ocean. Ten ages range from 11.6 ± 0.5 to 27.2 ± 0.9 ka with a mean age of 12.5 ± 0.7 ka after exclusion of two outliers. We consider this to be a minimum age for the abandonment of the moraines. The ages of the moraines are furthermore constrained using Optically Stimulated Luminescence (OSL) dating of epishelf sediments, which were deposited prior to the ice advance that formed the moraines, yielding a maximum age of 12.4 ± 0.6 ka, and bracketing the formation and subsequent abandonment of the moraines to within the interval 11.8-13.0 ka ago. This is the first time a synchronous YD glacier advance and subsequent retreat has been recorded for several independent glaciers in Greenland. In most other areas, there is no evidence for re-advance and glaciers were retreating during YD. We explain the different behaviour of the glaciers in northernmost Greenland as a function of their remoteness from the Atlantic Meridional Overturning Circulation (AMOC), which in other areas has been held responsible for modifying the YD drop in temperatures. Article in Journal/Newspaper Arctic Arctic Ocean glacier Greenland Ice Sheet North Greenland Aarhus University: Research Quaternary Science Reviews 147 47 58 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Greenland ice sheet Ice marginal fluctuations Surface exposure dating Younger Dryas |
spellingShingle |
Greenland ice sheet Ice marginal fluctuations Surface exposure dating Younger Dryas Larsen, Nicolaj K. Funder, Svend Linge, Henriette Möller, Per Schomacker, Anders Fabel, Derek Xu, Sheng Kjær, Kurt H. A Younger Dryas re-advance of local glaciers in north Greenland |
topic_facet |
Greenland ice sheet Ice marginal fluctuations Surface exposure dating Younger Dryas |
description |
The Younger Dryas (YD) is a well-constrained cold event from 12,900 to 11,700 years ago but it remains unclear how the cooling and subsequent abrupt warming recorded in ice cores was translated into ice margin fluctuations in Greenland. Here we present 10 Be surface exposure ages from three moraines in front of local glaciers on a 50 km stretch along the north coast of Greenland, facing the Arctic Ocean. Ten ages range from 11.6 ± 0.5 to 27.2 ± 0.9 ka with a mean age of 12.5 ± 0.7 ka after exclusion of two outliers. We consider this to be a minimum age for the abandonment of the moraines. The ages of the moraines are furthermore constrained using Optically Stimulated Luminescence (OSL) dating of epishelf sediments, which were deposited prior to the ice advance that formed the moraines, yielding a maximum age of 12.4 ± 0.6 ka, and bracketing the formation and subsequent abandonment of the moraines to within the interval 11.8-13.0 ka ago. This is the first time a synchronous YD glacier advance and subsequent retreat has been recorded for several independent glaciers in Greenland. In most other areas, there is no evidence for re-advance and glaciers were retreating during YD. We explain the different behaviour of the glaciers in northernmost Greenland as a function of their remoteness from the Atlantic Meridional Overturning Circulation (AMOC), which in other areas has been held responsible for modifying the YD drop in temperatures. |
format |
Article in Journal/Newspaper |
author |
Larsen, Nicolaj K. Funder, Svend Linge, Henriette Möller, Per Schomacker, Anders Fabel, Derek Xu, Sheng Kjær, Kurt H. |
author_facet |
Larsen, Nicolaj K. Funder, Svend Linge, Henriette Möller, Per Schomacker, Anders Fabel, Derek Xu, Sheng Kjær, Kurt H. |
author_sort |
Larsen, Nicolaj K. |
title |
A Younger Dryas re-advance of local glaciers in north Greenland |
title_short |
A Younger Dryas re-advance of local glaciers in north Greenland |
title_full |
A Younger Dryas re-advance of local glaciers in north Greenland |
title_fullStr |
A Younger Dryas re-advance of local glaciers in north Greenland |
title_full_unstemmed |
A Younger Dryas re-advance of local glaciers in north Greenland |
title_sort |
younger dryas re-advance of local glaciers in north greenland |
publishDate |
2016 |
url |
https://pure.au.dk/portal/da/publications/a-younger-dryas-readvance-of-local-glaciers-in-north-greenland(4d8db377-3e1e-477b-9b32-0db92b732e9a).html https://doi.org/10.1016/j.quascirev.2015.10.036 |
genre |
Arctic Arctic Ocean glacier Greenland Ice Sheet North Greenland |
genre_facet |
Arctic Arctic Ocean glacier Greenland Ice Sheet North Greenland |
op_source |
Larsen , N K , Funder , S , Linge , H , Möller , P , Schomacker , A , Fabel , D , Xu , S & Kjær , K H 2016 , ' A Younger Dryas re-advance of local glaciers in north Greenland ' , Quaternary Science Reviews , vol. 147 , pp. 47-58 . https://doi.org/10.1016/j.quascirev.2015.10.036 |
op_relation |
https://pure.au.dk/portal/da/publications/a-younger-dryas-readvance-of-local-glaciers-in-north-greenland(4d8db377-3e1e-477b-9b32-0db92b732e9a).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2015.10.036 |
container_title |
Quaternary Science Reviews |
container_volume |
147 |
container_start_page |
47 |
op_container_end_page |
58 |
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1786829342335041536 |