Glacial history of the Åsgardfonna Ice Cap, NE Spitsbergen, since the last glaciation
© 2020 The Author(s) 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 h...
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ftbatescollege:oai:scarab.bates.edu:faculty_publications-1210 2023-05-15T16:22:09+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 Brynjólfsson, Skafti Forwick, Matthias Kjellman, Sofia E. 2021-01-01T08:00:00Z application/pdf https://scarab.bates.edu/faculty_publications/206 https://scarab.bates.edu/cgi/viewcontent.cgi?article=1210&context=faculty_publications unknown SCARAB https://scarab.bates.edu/faculty_publications/206 https://scarab.bates.edu/cgi/viewcontent.cgi?article=1210&context=faculty_publications This is the publisher's version of the work. This publication appears in Bates College's institutional repository by permission of the copyright owner for personal use, not for redistribution. All Faculty Scholarship Deglaciation Glacier Holocene history Holocene thermal maximum Neoglacial Sediments Sub-bottom data Svalbard text 2021 ftbatescollege 2022-03-22T09:20:13Z © 2020 The Author(s) 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. Text glacier Ice cap Svalbard Spitsbergen Bates College: SCARAB (Scholarly Communication and Research at Bates) Femmilsjøen ENVELOPE(15.851,15.851,79.788,79.788) Svalbard |
institution |
Open Polar |
collection |
Bates College: SCARAB (Scholarly Communication and Research at Bates) |
op_collection_id |
ftbatescollege |
language |
unknown |
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 |
© 2020 The Author(s) 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 |
Text |
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 |
publisher |
SCARAB |
publishDate |
2021 |
url |
https://scarab.bates.edu/faculty_publications/206 https://scarab.bates.edu/cgi/viewcontent.cgi?article=1210&context=faculty_publications |
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 |
All Faculty Scholarship |
op_relation |
https://scarab.bates.edu/faculty_publications/206 https://scarab.bates.edu/cgi/viewcontent.cgi?article=1210&context=faculty_publications |
op_rights |
This is the publisher's version of the work. This publication appears in Bates College's institutional repository by permission of the copyright owner for personal use, not for redistribution. |
_version_ |
1766010130760990720 |