Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records
This is the peer reviewed version of the following article: Rasmussen, T.L. & Thomsen, E. (2015). Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records. Boreas, 44(1), 24-44. https://doi.org/10.1111/bor.12098, wh...
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Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Wiley
2014
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Online Access: | https://hdl.handle.net/10037/13332 https://doi.org/10.1111/bor.12098 |
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ftunivtroemsoe:oai:munin.uit.no:10037/13332 |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
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English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 Rasmussen, Tine Lander Thomsen, Erik Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 |
description |
This is the peer reviewed version of the following article: Rasmussen, T.L. & Thomsen, E. (2015). Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records. Boreas, 44(1), 24-44. https://doi.org/10.1111/bor.12098, which has been published in final form at https://doi.org/10.1111/bor.12098 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Brines can have a profound influence on the relative abundance of calcareous and agglutinated foraminiferal faunas. Here we investigated the distribution of benthic foraminiferal species in four cores from a brine‐enriched environment in Storfjorden, Svalbard. Stratigraphically, the cores comprise the last 15 000 years. The purpose of the study was to reconstruct changes in the palaeoecology and palaeoceanography of Storfjorden in relation to past climate changes, and to identify potential indicator species for brine‐affected environments. The benthic foraminifera in Storfjorden all have widespread occurrences in the Arctic realm. Calcareous species dominated Storfjorden during the deglaciation and early Holocene until c. 8200 a BP. However, agglutinated species increased in abundance whenever conditions became colder with more sea ice and stronger brine formation, such as during the Older Dryas, the Intra‐Allerød Cold Period and the Younger Dryas. Following a moderately cold period with numerous agglutinated foraminifera from c. 8200–4000 a BP, conditions became more changeable from c. 4000 a BP with repeated shifts between warmer periods dominated by calcareous species and colder periods dominated by agglutinated species. The warmer periods show a stronger influence of Atlantic Water, with reduced brine formation and less corrosive conditions at the sea bottom. Conversely, the colder periods show a stronger influence of Arctic water, with higher brine production and more corrosive bottom water. The distribution patterns of the calcareous species are basically the same whether calculated relative to the total fauna (including agglutinated specimens) or relative to calcareous specimens alone. Moreover, the patterns are similar to the patterns found elsewhere along western Svalbard in areas without the influence of brines. No particular species appear to be specifically linked to brine formation. However, the most persistent agglutinated species R. scorpiurus and A. glomerata are also the species most tolerant of the acidic bottom water that normally is associated with brine formation. |
format |
Article in Journal/Newspaper |
author |
Rasmussen, Tine Lander Thomsen, Erik |
author_facet |
Rasmussen, Tine Lander Thomsen, Erik |
author_sort |
Rasmussen, Tine Lander |
title |
Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records |
title_short |
Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records |
title_full |
Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records |
title_fullStr |
Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records |
title_full_unstemmed |
Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records |
title_sort |
paleoceanographic development in storfjorden, svalbard, during the deglaciation and holocene: evidence from benthic foraminiferal records |
publisher |
Wiley |
publishDate |
2014 |
url |
https://hdl.handle.net/10037/13332 https://doi.org/10.1111/bor.12098 |
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ENVELOPE(126.850,126.850,61.750,61.750) ENVELOPE(-3.933,-3.933,-71.300,-71.300) ENVELOPE(-64.084,-64.084,-65.248,-65.248) ENVELOPE(-66.232,-66.232,-65.794,-65.794) |
geographic |
Arctic Bor Boreas Rasmussen Svalbard Thomsen |
geographic_facet |
Arctic Bor Boreas Rasmussen Svalbard Thomsen |
genre |
Arctic Arctic Foraminifera* Sea ice Storfjorden Svalbard |
genre_facet |
Arctic Arctic Foraminifera* Sea ice Storfjorden Svalbard |
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Boreas info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ info:eu-repo/grantAgreement/RCN/MARINFORSK/216538/Norway/Effects of ocean chemistry changes on planktic foraminifera in the Fram Strait: Ocean Acidification from natural to anthropogenic changes// Rasmussen, T.L. & Thomsen, E. (2015). Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records. Boreas, 44(1), 24-44. https://doi.org/10.1111/bor.12098 FRIDAID 1145801 doi:10.1111/bor.12098 0300-9483 1502-3885 https://hdl.handle.net/10037/13332 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1111/bor.12098 |
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Boreas |
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44 |
container_issue |
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container_start_page |
24 |
op_container_end_page |
44 |
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spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/13332 2023-05-15T14:27:40+02:00 Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records Rasmussen, Tine Lander Thomsen, Erik 2014-08-07 https://hdl.handle.net/10037/13332 https://doi.org/10.1111/bor.12098 eng eng Wiley Boreas info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ info:eu-repo/grantAgreement/RCN/MARINFORSK/216538/Norway/Effects of ocean chemistry changes on planktic foraminifera in the Fram Strait: Ocean Acidification from natural to anthropogenic changes// Rasmussen, T.L. & Thomsen, E. (2015). Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records. Boreas, 44(1), 24-44. https://doi.org/10.1111/bor.12098 FRIDAID 1145801 doi:10.1111/bor.12098 0300-9483 1502-3885 https://hdl.handle.net/10037/13332 openAccess VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 Journal article Tidsskriftartikkel Peer reviewed 2014 ftunivtroemsoe https://doi.org/10.1111/bor.12098 2021-06-25T17:55:51Z This is the peer reviewed version of the following article: Rasmussen, T.L. & Thomsen, E. (2015). Paleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal records. Boreas, 44(1), 24-44. https://doi.org/10.1111/bor.12098, which has been published in final form at https://doi.org/10.1111/bor.12098 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Brines can have a profound influence on the relative abundance of calcareous and agglutinated foraminiferal faunas. Here we investigated the distribution of benthic foraminiferal species in four cores from a brine‐enriched environment in Storfjorden, Svalbard. Stratigraphically, the cores comprise the last 15 000 years. The purpose of the study was to reconstruct changes in the palaeoecology and palaeoceanography of Storfjorden in relation to past climate changes, and to identify potential indicator species for brine‐affected environments. The benthic foraminifera in Storfjorden all have widespread occurrences in the Arctic realm. Calcareous species dominated Storfjorden during the deglaciation and early Holocene until c. 8200 a BP. However, agglutinated species increased in abundance whenever conditions became colder with more sea ice and stronger brine formation, such as during the Older Dryas, the Intra‐Allerød Cold Period and the Younger Dryas. Following a moderately cold period with numerous agglutinated foraminifera from c. 8200–4000 a BP, conditions became more changeable from c. 4000 a BP with repeated shifts between warmer periods dominated by calcareous species and colder periods dominated by agglutinated species. The warmer periods show a stronger influence of Atlantic Water, with reduced brine formation and less corrosive conditions at the sea bottom. Conversely, the colder periods show a stronger influence of Arctic water, with higher brine production and more corrosive bottom water. The distribution patterns of the calcareous species are basically the same whether calculated relative to the total fauna (including agglutinated specimens) or relative to calcareous specimens alone. Moreover, the patterns are similar to the patterns found elsewhere along western Svalbard in areas without the influence of brines. No particular species appear to be specifically linked to brine formation. However, the most persistent agglutinated species R. scorpiurus and A. glomerata are also the species most tolerant of the acidic bottom water that normally is associated with brine formation. Article in Journal/Newspaper Arctic Arctic Foraminifera* Sea ice Storfjorden Svalbard University of Tromsø: Munin Open Research Archive Arctic Bor ENVELOPE(126.850,126.850,61.750,61.750) Boreas ENVELOPE(-3.933,-3.933,-71.300,-71.300) Rasmussen ENVELOPE(-64.084,-64.084,-65.248,-65.248) Svalbard Thomsen ENVELOPE(-66.232,-66.232,-65.794,-65.794) Boreas 44 1 24 44 |