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dc.contributor.authorJohansen, Sverre
dc.contributor.authorPoste, Amanda
dc.contributor.authorAllan, Ian
dc.contributor.authorEvenset, Anita
dc.contributor.authorCarlsson, Pernilla Marianne
dc.date.accessioned2021-06-24T07:35:33Z
dc.date.available2021-06-24T07:35:33Z
dc.date.issued2021-03-17
dc.description.abstract<p>Considerable amounts of previously deposited persistent organic pollutants (POPs) are stored in the Arctic cryosphere. Transport of freshwater and terrestrial material to the Arctic Ocean is increasing due to ongoing climate change and the impact this has on POPs in marine receiving systems is unknown This study has investigated how secondary sources of POPs from land influence the occurrence and fate of POPs in an Arctic coastal marine system. <p>Passive sampling of water and sampling of riverine suspended particulate matter (SPM) and marine sediments for analysis of polychlorinated biphenyls (PCBs) and hexachlorobenzene (HCB) was carried out in rivers and their receiving fjords in Isfjorden system in Svalbard. Riverine SPM had low contaminant concentrations (<level of detection-28 pg/g dw ΣPCB<sub>14</sub>, 16–100 pg/g dw HCB) compared to outer marine sediments 630-880 pg/g dw ΣPCB<sub>14</sub>, 530–770 pg/g dw HCB). There was a strong spatial gradient in sediment PCB and HCB concentrations with lowest concentrations in river estuaries and in front of marine-terminating glaciers and increasing concentrations toward the outer fjord. This suggests that rather than leading to increased concentrations, inputs of SPM from land lead to a dilution of contaminant concentrations in nearshore sediments. Preliminary estimates of SPM:water activity ratios suggest that terrestrial particles (with low contaminant concentrations) may have the potential to act as sorbents of dissolved contaminants in the coastal water column, with implications for bioavailability of POPs to the marine food web. There is concern that ongoing increases in fluxes of freshwater, sediments and associated terrestrial material (including contaminants) from land to the Arctic Ocean will lead to increased mobilization and transport of POPs to coastal ecosystems. However, the results of this study indicate that on Svalbard, inputs from land may in fact have the opposite effect, leading to reduced concentrations in coastal sediments and waters.en_US
dc.identifier.citationJohansen S, Poste A, Allan I, Evenset A, Carlsson PM. Terrestrial inputs govern spatial distribution of polychlorinated biphenyls (PCBs) and hexachlorobenzene (HCB) in an Arctic fjord system (Isfjorden, Svalbard). Environmental Pollution (1987). 2021;281en_US
dc.identifier.cristinIDFRIDAID 1907869
dc.identifier.doi10.1016/j.envpol.2021.116963
dc.identifier.issn0269-7491
dc.identifier.issn1873-6424
dc.identifier.urihttps://hdl.handle.net/10037/21544
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalEnvironmental Pollution (1987)
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/POLARPROG/268458/Norway/Where land meets sea: Effects of terrestrial inputs on contaminant dynamics in Arctic coastal ecosystems/TerrACE/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecotoxicology: 489en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økotoksikologi: 489en_US
dc.titleTerrestrial inputs govern spatial distribution of polychlorinated biphenyls (PCBs) and hexachlorobenzene (HCB) in an Arctic fjord system (Isfjorden, Svalbard)en_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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