Show simple item record

dc.contributor.authorRasmussen, Tine Lander
dc.contributor.authorThomsen, Erik
dc.date.accessioned2018-08-02T07:57:43Z
dc.date.available2018-08-02T07:57:43Z
dc.date.issued2014-08-07
dc.description.abstractBrines 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 <i>R. scorpiurus</i> and <i>A. glomerata</i> are also the species most tolerant of the acidic bottom water that normally is associated with brine formation.en_US
dc.description.sponsorshipUiT The Arctic University of Norway The Mohn Foundation The Norwegian Polar Institute.en_US
dc.descriptionThis 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 <a href=https://doi.org/10.1111/bor.12098> https://doi.org/10.1111/bor.12098</a>. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.en_US
dc.identifier.citationRasmussen, 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.12098en_US
dc.identifier.cristinIDFRIDAID 1145801
dc.identifier.doi10.1111/bor.12098
dc.identifier.issn0300-9483
dc.identifier.issn1502-3885
dc.identifier.urihttps://hdl.handle.net/10037/13332
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalBoreas
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/en_US
dc.relation.projectIDinfo: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//en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466en_US
dc.titlePaleoceanographic development in Storfjorden, Svalbard, during the deglaciation and Holocene: evidence from benthic foraminiferal recordsen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


File(s) in this item

Thumbnail

This item appears in the following collection(s)

Show simple item record