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...
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Online Access: | https://hdl.handle.net/10037/20024 https://doi.org/10.1016/j.quascirev.2020.106717 |
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ftunivtroemsoe:oai:munin.uit.no:10037/20024 2023-05-15T16:22:12+02:00 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 J. Brynjólfsson, Skafti Forwick, Matthias Kjellman, Sofia Elisabeth 2020-11-30 https://hdl.handle.net/10037/20024 https://doi.org/10.1016/j.quascirev.2020.106717 eng eng Elsevier Allaart, L. (2021). Late Pleistocene-Holocene history of Svalbard ice caps and glaciers – integrating marine, terrestrial and lacustrine archives. (Doctoral thesis). https://hdl.handle.net/10037/20634 . Quaternary Science Reviews Svalbards miljøvernfond: 17/01132-3 Norges forskningsråd: 282643 Svalbards miljøvernfond: 16/35 Allaart L, Schomacker A, Larsen NK, Nørmark, Rydningen TA, Farnsworth WR, Retelle MJ, Brynjólfsson S, Forwick M, Kjellman SE. Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation. Quaternary Science Reviews. 2020;251(106717) FRIDAID 1856817 doi:10.1016/j.quascirev.2020.106717 0277-3791 1873-457X https://hdl.handle.net/10037/20024 openAccess Copyright 2020 The Author(s) VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2020 ftunivtroemsoe https://doi.org/10.1016/j.quascirev.2020.106717 2021-06-25T17:57:49Z 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 University of Tromsø: Munin Open Research Archive Femmilsjøen ENVELOPE(15.851,15.851,79.788,79.788) Svalbard Quaternary Science Reviews 251 106717 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Allaart, Lis Schomacker, Anders Larsen, Nicolaj K. Nørmark, Egon Rydningen, Tom Arne Farnsworth, Wesley R. Retelle, Michael J. Brynjólfsson, Skafti Forwick, Matthias Kjellman, Sofia Elisabeth Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
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 J. Brynjólfsson, Skafti Forwick, Matthias Kjellman, Sofia Elisabeth |
author_facet |
Allaart, Lis Schomacker, Anders Larsen, Nicolaj K. Nørmark, Egon Rydningen, Tom Arne Farnsworth, Wesley R. Retelle, Michael J. Brynjólfsson, Skafti Forwick, Matthias Kjellman, Sofia Elisabeth |
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 |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/20024 https://doi.org/10.1016/j.quascirev.2020.106717 |
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_relation |
Allaart, L. (2021). Late Pleistocene-Holocene history of Svalbard ice caps and glaciers – integrating marine, terrestrial and lacustrine archives. (Doctoral thesis). https://hdl.handle.net/10037/20634 . Quaternary Science Reviews Svalbards miljøvernfond: 17/01132-3 Norges forskningsråd: 282643 Svalbards miljøvernfond: 16/35 Allaart L, Schomacker A, Larsen NK, Nørmark, Rydningen TA, Farnsworth WR, Retelle MJ, Brynjólfsson S, Forwick M, Kjellman SE. Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation. Quaternary Science Reviews. 2020;251(106717) FRIDAID 1856817 doi:10.1016/j.quascirev.2020.106717 0277-3791 1873-457X https://hdl.handle.net/10037/20024 |
op_rights |
openAccess Copyright 2020 The Author(s) |
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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1766010175258361856 |