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dc.contributor.authorSamanta, Saumik
dc.contributor.authorCloete, Ryan
dc.contributor.authorPrakash Dey, Subhra
dc.contributor.authorBarraqueta, Jan‑Lukas Menzel
dc.contributor.authorLoock, Jean C.
dc.contributor.authorMeynecke, Jan‑Olaf
dc.contributor.authorde Bie, Jasper
dc.contributor.authorVichi, Marcello
dc.contributor.authorRoychoudhury, Alakendra N.
dc.coverage.spatialSouthern Capeen_US
dc.coverage.spatialAgulhas Currenten_US
dc.date.accessioned2023-09-23T20:07:02Z
dc.date.available2023-09-23T20:07:02Z
dc.date.issued2023
dc.identifier.doihttps://doi.org/10.1038/s41598-023-32613-5
dc.identifier.urihttp://hdl.handle.net/1834/42792
dc.description.abstractUsing a spatiotemporal dataset of dissolved lead (dPb) from the subtropical oceans surrounding South Africa, this study quantifies the exchange of dPb between the Indian and Atlantic Oceans. Despite the absence of a major Pb source within the South Atlantic sector and the complete phase-out of leaded petroleum in Southern Africa, the ecologically important southeast Cape Basin shows an elevated surface dPb concentration (21–30 pmol kg− 1). We estimated up to 90% of the measured dPb in surface waters of the Cape Basin was delivered from the Indian Ocean via the Agulhas Current (AC). Eddy dynamics and leakage at Agulhas retroflection result in an increased Pb flux from winter to summer, while a long-term (2008–2019) temporal change in dPb in the AC-derived water of Cape Basin was contemporaneous to a change in atmospheric Pb emissions from South Africa. The South Africanorigin atmospheric Pb, however, contributes first to the Agulhas waters in the West Indian Ocean, which is then transported to the South Atlantic, thereby regulating the dPb inventory of the Cape Basin. This indirect mechanism of Pb transfer emphasizes the importance of regulating Pb emissions from Southern Africa to protect rich fishing grounds associated with the Benguela marine ecosystem.
dc.language.isoenen_US
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subject.otherLeaden_US
dc.titleExchange of Pb from Indian to Atlantic Ocean is driven by Agulhas current and atmospheric Pb input from South Africa.en_US
dc.typeJournal Contributionen_US
dc.bibliographicCitation.issue5465en_US
dc.bibliographicCitation.titleScientific Reportsen_US
dc.bibliographicCitation.volume13en_US
dc.description.notesChallenge 4, 9en_US
dc.description.statusPublisheden_US
refterms.dateFOA2023-09-23T20:07:03Z
html.description.abstractUsing a spatiotemporal dataset of dissolved lead (dPb) from the subtropical oceans surrounding South Africa, this study quantifies the exchange of dPb between the Indian and Atlantic Oceans. Despite the absence of a major Pb source within the South Atlantic sector and the complete phase-out of leaded petroleum in Southern Africa, the ecologically important southeast Cape Basin shows an elevated surface dPb concentration (21–30 pmol kg− 1). We estimated up to 90% of the measured dPb in surface waters of the Cape Basin was delivered from the Indian Ocean via the Agulhas Current (AC). Eddy dynamics and leakage at Agulhas retroflection result in an increased Pb flux from winter to summer, while a long-term (2008–2019) temporal change in dPb in the AC-derived water of Cape Basin was contemporaneous to a change in atmospheric Pb emissions from South Africa. The South Africanorigin atmospheric Pb, however, contributes first to the Agulhas waters in the West Indian Ocean, which is then transported to the South Atlantic, thereby regulating the dPb inventory of the Cape Basin. This indirect mechanism of Pb transfer emphasizes the importance of regulating Pb emissions from Southern Africa to protect rich fishing grounds associated with the Benguela marine ecosystem.en_US
dc.description.refereedRefereeden_US


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