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dc.contributor.authorBridgestock, Luke
dc.contributor.authorNathan, Joseph
dc.contributor.authorHsieh, Yu-Te
dc.contributor.authorHoldship, Phil
dc.contributor.authorPorcelli, Don
dc.contributor.authorAndersson, Per S.
dc.contributor.authorHenderson, Gideon M.
dc.identifier.citationBridgestock , L , Nathan , J , Hsieh , Y-T , Holdship , P , Porcelli , D , Andersson , P S & Henderson , G M 2021 , ' Assessing the utility of barium isotopes to trace Eurasian riverine freshwater inputs to the Arctic Ocean ' , Marine Chemistry , vol. 236 , 104029 .
dc.identifier.otherPURE: 283736689
dc.identifier.otherPURE UUID: efe8999a-2e57-4f0c-8f14-4241d13387cc
dc.identifier.otherScopus: 85114138310
dc.identifier.otherORCID: /0000-0001-7636-6090/work/131122773
dc.descriptionFunding: The ISSS-08 program was supported by the Knut and Alice Wallenberg Foundation, the Far Eastern Branch of the Russian Academy of Sciences and the Swedish Research Council (VR contract 621–e2004-4283).en
dc.description.abstractTracing riverine freshwater transport pathways within the Arctic Ocean is key to understanding changes in Arctic Ocean freshwater inventories. Dissolved Ba concentrations have been used in this capacity but are compromised by non-conservative processes. To assess the potential for Ba isotopes to provide insights into the impact of such processes on Arctic Ocean dissolved Ba inventories, Ba concentration and isotope data for surface seawater samples from the Siberian Shelf and Bering Sea/Strait are presented. These samples capture the mixing of riverine freshwater discharged by the rivers Yenisey, Lena and Ob, with Atlantic and Pacific derived seawater, which are traced by relationships between salinity, Ba concentration and δ138/134Ba. The δ138/134Ba of net river inputs, following modification by estuarine processes, are constrained to be 0.31 ± 0.04‰, 0.20 ± 0.06‰ and 0.23 ± 0.04‰, for the rivers Yenisey, Lena and Ob respectively. These values are used to estimate an average δ138/134Ba for Eurasian river freshwater input to the Arctic Ocean of 0.23 ± 0.04‰. The Ba concentration and δ138/134Ba of Lena River freshwater transported across the Laptev Sea are modified by non-conservative processes. These non-conservative processes do not result in distinctive modification of dissolved Ba concentration-δ138/134Ba mixing relationships between Eurasian riverine freshwater and Arctic seawater, which unfortunately limits the potential of Ba isotopes to improve tracing riverine freshwater sources in the central Arctic Ocean basins using dissolved Ba inventories. More generally the results of this study help advance understanding of Ba isotope cycling in the environment and their development as an emerging tracer of marine processes.
dc.relation.ispartofMarine Chemistryen
dc.rightsCopyright © 2021 Elsevier B.V. All rights reserved. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectBa isotopesen
dc.subjectArctic Ocean freshwateren
dc.subjectMarine Ba cycleen
dc.subjectEstuarine Ba cyclingen
dc.subjectQE Geologyen
dc.subjectGE Environmental Sciencesen
dc.subjectSDG 14 - Life Below Wateren
dc.titleAssessing the utility of barium isotopes to trace Eurasian riverine freshwater inputs to the Arctic Oceanen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. School of Earth & Environmental Sciencesen
dc.description.statusPeer revieweden

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