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dc.contributor.authorJang, Kwangchul
dc.contributor.authorAhn, Youngkyu
dc.contributor.authorJoe, Young Jin
dc.contributor.authorBraun, Carmen
dc.contributor.authorJoo, Young Ji
dc.contributor.authorKim, Jung-Hyun
dc.contributor.authorBayon, Germain
dc.contributor.authorForwick, Matthias
dc.contributor.authorVogt, Christoph
dc.contributor.authorNam, Seung-Il
dc.date.accessioned2021-08-19T11:50:30Z
dc.date.available2021-08-19T11:50:30Z
dc.date.issued2021-04-05
dc.description.abstractThe reconstruction of past ice sheet extents and dynamics in polar regions is essential for understanding the global climate system and obtaining more reliable predictions of future climate change. Here, we present a multi-proxy dataset integrating the Nd isotopic compositions (εNd) of paired detrital and authigenic Fe oxide fractions, grain size distributions, organic geochemistry, and mineral assemblages in a glacimarine sediment core (core HH17–1085-GC) retrieved from the continental shelf off northern Svalbard. Our results indicate variability in sediment provenance and chemical weathering patterns since the last deglaciation, allowing us to distinguish a succession of distinct paleoclimate events: 1) a general retreat of the Svalbard-Barents Sea Ice Sheet (SBIS) from the continental shelf before ca. 16.3 ka BP; 2) an intense episode of meltwater discharge related to massive glacier loss between ca. 12.1–9.9 ka BP; and 3) a period of reduced meltwater input between ca. 9.9 and 2.7 ka BP followed by 4) a phase of glacier re-advance over the last two millennia. Evidence for the prolonged supply of radiogenic detrital εNd and dolomite at the site of core HH17–1085-GC indicates that the onset of deglaciation offshore northeastern Svalbard may have occurred at least 1 ka later than that at the northwestern shelf, which can be further evaluated by obtaining a more precise end-member determination for the northeastern source with a quantitative εNd dataset from Nordaustlandet. In the context where both polar sea-ice and oceanic circulation are expected to have played minor roles in determining the sedimentary εNd compositions, the evidence for pronounced Nd isotopic decoupling between paired authigenic and detrital signatures (ΔεNd) at ca. 15.2 and 14.1 ka BP is interpreted as reflecting chemical weathering changes following the retreat of the SBIS on northern Svalbard, probably corresponding to punctual episodes of glacial re-advances. Our findings provide a better understanding of the deglacial history of northern Svalbard during and after the last deglaciation and highlight the utility of Nd isotopes as a proxy for reconstructing paleo-cryosphere changesen_US
dc.descriptionAccepted manuscript version, licensed <a href=http://creativecommons.org/licenses/by-nc-nd/4.0/> CC BY-NC-ND 4.0. </a>en_US
dc.identifier.citationJang K, Ahn, Joe YJ, Braun CA, Joo YJ, Kim J, Bayon G, Forwick M, Vogt C, Nam S. Glacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopes. Global and Planetary Change. 2021;201en_US
dc.identifier.cristinIDFRIDAID 1924353
dc.identifier.doi10.1016/j.gloplacha.2021.103483
dc.identifier.issn0921-8181
dc.identifier.issn1872-6364
dc.identifier.urihttps://hdl.handle.net/10037/22144
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalGlobal and Planetary Change
dc.relation.projectIDAndre: 2017R1A6A3A01076729en_US
dc.relation.projectIDAndre: NRF-2015M1A5A1037243en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holder© 2021 Elsevier B.V. All rights reserved.en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.titleGlacial and environmental changes in northern Svalbard over the last 16.3 ka inferred from neodymium isotopesen_US
dc.type.versionacceptedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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