Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation
The response of glaciers and ice caps to past climate change provides important insight into how they will react to ongoing and future global warming. In Svalbard, the Holocene glacial history has been studied for many cirque and valley glaciers. However, little is known about how the larger ice cap...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2021
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Online Access: | https://pure.au.dk/portal/en/publications/5d871de6-d3f5-49b1-a946-2a0dff7e884f https://doi.org/10.1016/j.quascirev.2020.106717 https://pure.au.dk/ws/files/285208022/1_s2.0_S027737912030679X_main.pdf http://www.scopus.com/inward/record.url?scp=85097097908&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/5d871de6-d3f5-49b1-a946-2a0dff7e884f 2024-06-23T07:53:04+00:00 Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation Allaart, Lis Schomacker, Anders Larsen, Nicolaj K. Nørmark, Egon Rydningen, Tom Arne Farnsworth, Wesley R. Retelle, Michael Brynjólfsson, Skafti Forwick, Matthias Kjellman, Sofia E. 2021-01 application/pdf https://pure.au.dk/portal/en/publications/5d871de6-d3f5-49b1-a946-2a0dff7e884f https://doi.org/10.1016/j.quascirev.2020.106717 https://pure.au.dk/ws/files/285208022/1_s2.0_S027737912030679X_main.pdf http://www.scopus.com/inward/record.url?scp=85097097908&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/5d871de6-d3f5-49b1-a946-2a0dff7e884f info:eu-repo/semantics/openAccess Allaart , L , Schomacker , A , Larsen , N K , Nørmark , E , Rydningen , T A , Farnsworth , W R , Retelle , M , Brynjólfsson , S , Forwick , M & Kjellman , S E 2021 , ' Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation ' , Quaternary Science Reviews , vol. 251 , 106717 . https://doi.org/10.1016/j.quascirev.2020.106717 Deglaciation Glacier Holocene history Holocene thermal maximum Neoglacial Sediments Sub-bottom data Svalbard article 2021 ftuniaarhuspubl https://doi.org/10.1016/j.quascirev.2020.106717 2024-06-04T14:34:42Z The response of glaciers and ice caps to past climate change provides important insight into how they will react to ongoing and future global warming. In Svalbard, the Holocene glacial history has been studied for many cirque and valley glaciers. However, little is known about how the larger ice caps in Svalbard responded to Late Glacial and Holocene climate changes. Here we use lake sediment cores and geophysical data from Femmilsjøen, one of Svalbard's largest lakes, to reconstruct the glacial history of the Åsgardfonna Ice Cap since the last deglaciation. We find that Femmilsjøen potentially deglaciated prior to 16.1 ± 0.3 cal ka BP and became isolated from the marine environment between 11.7 ± 0.3 to 11.3 ± 0.2 cal ka BP. Glacial meltwater runoff was absent between 10.1 ± 0.4 and 3.2 ± 0.2 cal ka BP, indicating that Åsgardfonna was greatly reduced or disappeared in the Early and Middle Holocene. Deposition of glacial-meltwater sediments re-commenced in Femmilsjøen at c. 3.2 ± 0.2 cal ka BP, indicating glacier re-growth in the Femmilsjøen catchment and the onset of the Neoglacial. The glacier(s) in the Femmilsjøen catchment area reached sizes no smaller than their modern extents already at c. 2.1 ± 0.7 cal ka BP. Our results suggest that larger Svalbard ice caps such as Åsgardfonna are very sensitive to climate changes and probably melted completely during the Holocene Thermal Maximum. Such information can be used as important constraints in future ice-cap simulations. Article in Journal/Newspaper glacier Ice cap Svalbard Spitsbergen Aarhus University: Research Femmilsjøen ENVELOPE(15.851,15.851,79.788,79.788) Svalbard Quaternary Science Reviews 251 106717 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Deglaciation Glacier Holocene history Holocene thermal maximum Neoglacial Sediments Sub-bottom data Svalbard |
spellingShingle |
Deglaciation Glacier Holocene history Holocene thermal maximum Neoglacial Sediments Sub-bottom data Svalbard Allaart, Lis Schomacker, Anders Larsen, Nicolaj K. Nørmark, Egon Rydningen, Tom Arne Farnsworth, Wesley R. Retelle, Michael Brynjólfsson, Skafti Forwick, Matthias Kjellman, Sofia E. Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation |
topic_facet |
Deglaciation Glacier Holocene history Holocene thermal maximum Neoglacial Sediments Sub-bottom data Svalbard |
description |
The response of glaciers and ice caps to past climate change provides important insight into how they will react to ongoing and future global warming. In Svalbard, the Holocene glacial history has been studied for many cirque and valley glaciers. However, little is known about how the larger ice caps in Svalbard responded to Late Glacial and Holocene climate changes. Here we use lake sediment cores and geophysical data from Femmilsjøen, one of Svalbard's largest lakes, to reconstruct the glacial history of the Åsgardfonna Ice Cap since the last deglaciation. We find that Femmilsjøen potentially deglaciated prior to 16.1 ± 0.3 cal ka BP and became isolated from the marine environment between 11.7 ± 0.3 to 11.3 ± 0.2 cal ka BP. Glacial meltwater runoff was absent between 10.1 ± 0.4 and 3.2 ± 0.2 cal ka BP, indicating that Åsgardfonna was greatly reduced or disappeared in the Early and Middle Holocene. Deposition of glacial-meltwater sediments re-commenced in Femmilsjøen at c. 3.2 ± 0.2 cal ka BP, indicating glacier re-growth in the Femmilsjøen catchment and the onset of the Neoglacial. The glacier(s) in the Femmilsjøen catchment area reached sizes no smaller than their modern extents already at c. 2.1 ± 0.7 cal ka BP. Our results suggest that larger Svalbard ice caps such as Åsgardfonna are very sensitive to climate changes and probably melted completely during the Holocene Thermal Maximum. Such information can be used as important constraints in future ice-cap simulations. |
format |
Article in Journal/Newspaper |
author |
Allaart, Lis Schomacker, Anders Larsen, Nicolaj K. Nørmark, Egon Rydningen, Tom Arne Farnsworth, Wesley R. Retelle, Michael Brynjólfsson, Skafti Forwick, Matthias Kjellman, Sofia E. |
author_facet |
Allaart, Lis Schomacker, Anders Larsen, Nicolaj K. Nørmark, Egon Rydningen, Tom Arne Farnsworth, Wesley R. Retelle, Michael Brynjólfsson, Skafti Forwick, Matthias Kjellman, Sofia E. |
author_sort |
Allaart, Lis |
title |
Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation |
title_short |
Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation |
title_full |
Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation |
title_fullStr |
Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation |
title_full_unstemmed |
Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation |
title_sort |
glacial history of the åsgardfonna ice cap, ne spitsbergen, since the last glaciation |
publishDate |
2021 |
url |
https://pure.au.dk/portal/en/publications/5d871de6-d3f5-49b1-a946-2a0dff7e884f https://doi.org/10.1016/j.quascirev.2020.106717 https://pure.au.dk/ws/files/285208022/1_s2.0_S027737912030679X_main.pdf http://www.scopus.com/inward/record.url?scp=85097097908&partnerID=8YFLogxK |
long_lat |
ENVELOPE(15.851,15.851,79.788,79.788) |
geographic |
Femmilsjøen Svalbard |
geographic_facet |
Femmilsjøen Svalbard |
genre |
glacier Ice cap Svalbard Spitsbergen |
genre_facet |
glacier Ice cap Svalbard Spitsbergen |
op_source |
Allaart , L , Schomacker , A , Larsen , N K , Nørmark , E , Rydningen , T A , Farnsworth , W R , Retelle , M , Brynjólfsson , S , Forwick , M & Kjellman , S E 2021 , ' Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation ' , Quaternary Science Reviews , vol. 251 , 106717 . https://doi.org/10.1016/j.quascirev.2020.106717 |
op_relation |
https://pure.au.dk/portal/en/publications/5d871de6-d3f5-49b1-a946-2a0dff7e884f |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2020.106717 |
container_title |
Quaternary Science Reviews |
container_volume |
251 |
container_start_page |
106717 |
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1802644554414817280 |