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dc.contributor.authorBerben, Sarah Miche Patricia
dc.contributor.authorHusum, Katrine
dc.contributor.authorNavarro-Rodriguez, Alba
dc.contributor.authorBelt, Simon T.
dc.contributor.authorSørensen, Steffen Aagaard
dc.date.accessioned2018-07-11T12:34:42Z
dc.date.available2018-07-11T12:34:42Z
dc.date.issued2017-06-07
dc.description.abstractSemi-quantitative estimates of early to late Holocene spring sea ice concentration (SpSIC) andoccurrence of summer sea ice for the northern Barents Sea have been obtained by analysing the biomarkers IP<sub>25</sub>,brassicasterol and a tri-unsaturated highly branched isoprenoid lipid in a Holocene marine sediment core.Sub-surface water mass variations were derived from planktic foraminiferal assemblages and stable isotopes (d<sup>18</sup>O,d<sup>13</sup>C). The record indicates paleoceanographic changes over three intervals. During Period I (ca. 9500–5900 cal aBP), the study location experienced the lowest recorded SpSIC (ca. 25%) with short spring seasons and longproductive summers, resulting partly from increased Atlantic Water inflow that caused a stronger ocean–atmosphere heat exchange. Throughout Period II (ca. 5900–2700 cal a BP), the winter sea ice margin migratedsouthwards and an overall cooling trend resulted in higher SpSIC (ca. 60%) and increased delivery of cold ArcticWater. During Period III (ca. 2700 cal a BP to present), SpSIC increased further (ca. 75%) and some sea iceremained during summer months. A sub-surface warming probably indicates a decoupling of heat exchangebetween the ocean and the atmosphere. Longer springs and shorter summers were accompanied by the mostsoutherly location of the winter sea ice margin.en_US
dc.description.sponsorshipUiT–The Arctic University of Norway and the Norwegian Polar Institute. Statoil, DetNorske BG Norgeen_US
dc.descriptionAccepted manuscript version. Published version available at: <a href=http://doi.org/10.1002/jqs.2953> http://doi.org/10.1002/jqs.2953</a>en_US
dc.identifier.citationBerben, S. M. P., Husum, K., Navarro-Rodriguez, A., Belt, S. T. & Sørensen, S. A. (2017). Semi-quantitative reconstruction of early to late Holocene spring and summer sea ice conditions in the northern Barents Sea. Journal of Quaternary Science, 32(5), 587-603. http://doi.org/10.1002/jqs.2953en_US
dc.identifier.cristinIDFRIDAID 1543287
dc.identifier.doi10.1002/jqs.2953
dc.identifier.issn0267-8179
dc.identifier.issn1099-1417
dc.identifier.urihttps://hdl.handle.net/10037/13217
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalJournal of Quaternary Science
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/PETROMAKS/200672/Norway/Glaciations in the Barents Sea area//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/PETROMAKS2/200672/Norway/Glaciations in the Barents Sea area//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7/238111/EU/THE CHANGING ARCTIC AND SUB-ARCTIC ENVIRONMENT: A RESEARCH AND TRAINING PROGRAMME ON MARINE BIOTIC INDICATORS OF RECENT CLIMATE CHANGES IN THE HIGH LATITUDES OF THE NORTH ATLANTIC/CASE/en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452en_US
dc.titleSemi-quantitative reconstruction of early to late Holocene spring and summer sea ice conditions in the northern Barents Seaen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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