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Anthropogenic signatures of lead in the northeast Atlantic

Anthropogenic signatures of lead in the northeast Atlantic
Anthropogenic signatures of lead in the northeast Atlantic

Anthropogenic activities have resulted in enhanced lead (Pb) emissions to the environment over the past century, mainly through the combustion of leaded gasoline. Here we present the first combined dissolved (DPb), labile (LpPb), and particulate (PPb) Pb data set from the Northeast Atlantic (Celtic Sea) since the phasing out of leaded gasoline in Europe. Concentrations of DPb in surface waters have decreased by fourfold over the last four decades. We demonstrate that anthropogenic Pb is transported from the Mediterranean Sea over long distances (>2,500 km). Benthic DPb fluxes exceeded the atmospheric Pb flux in the region, indicating the importance of sediments as a contemporary Pb source. A strong positive correlation between DPb, PPb, and LpPb indicates a dynamic equilibrium between the phases and the potential for particles to "buffer" the DPb pool. This study provides insights into Pb biogeochemical cycling and demonstrates the potential of Pb in constraining ocean circulation patterns.

Celtic Sea, Lead, MOW, Particles, Sediments, Trace metals
0094-8276
2734-2743
Rusiecka, D.
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Gledhill, M.
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Milne, A.
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Achterberg, E. P.
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Annett, A. L.
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Atkinson, S.
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Birchill, A.
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Karstensen, J.
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Lohan, M.
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Mariez, C.
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Middag, R.
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Rolison, J. M.
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Tanhua, T.
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Ussher, S.
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Connelly, D.
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Rusiecka, D.
70c9f91b-6ed5-451a-bccb-832fb7022724
Gledhill, M.
da795c1e-1489-4d40-9df1-fc6bde54382d
Milne, A.
e496b797-6206-414e-8f50-d2f2ce260fc9
Achterberg, E. P.
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Annett, A. L.
de404d72-7e90-4dbd-884a-1df813808276
Atkinson, S.
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Birchill, A.
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Karstensen, J.
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Lohan, M.
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Mariez, C.
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Middag, R.
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Rolison, J. M.
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Tanhua, T.
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Ussher, S.
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Connelly, D.
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Rusiecka, D., Gledhill, M., Milne, A., Achterberg, E. P., Annett, A. L., Atkinson, S., Birchill, A., Karstensen, J., Lohan, M., Mariez, C., Middag, R., Rolison, J. M., Tanhua, T., Ussher, S. and Connelly, D. (2018) Anthropogenic signatures of lead in the northeast Atlantic. Geophysical Research Letters, 45 (6), 2734-2743. (doi:10.1002/2017GL076825).

Record type: Article

Abstract

Anthropogenic activities have resulted in enhanced lead (Pb) emissions to the environment over the past century, mainly through the combustion of leaded gasoline. Here we present the first combined dissolved (DPb), labile (LpPb), and particulate (PPb) Pb data set from the Northeast Atlantic (Celtic Sea) since the phasing out of leaded gasoline in Europe. Concentrations of DPb in surface waters have decreased by fourfold over the last four decades. We demonstrate that anthropogenic Pb is transported from the Mediterranean Sea over long distances (>2,500 km). Benthic DPb fluxes exceeded the atmospheric Pb flux in the region, indicating the importance of sediments as a contemporary Pb source. A strong positive correlation between DPb, PPb, and LpPb indicates a dynamic equilibrium between the phases and the potential for particles to "buffer" the DPb pool. This study provides insights into Pb biogeochemical cycling and demonstrates the potential of Pb in constraining ocean circulation patterns.

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Rusiecka_et_al-2018-Geophysical_Research_Letters - Version of Record
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More information

Accepted/In Press date: 27 February 2018
e-pub ahead of print date: 23 March 2018
Published date: 28 March 2018
Keywords: Celtic Sea, Lead, MOW, Particles, Sediments, Trace metals

Identifiers

Local EPrints ID: 419800
URI: http://eprints.soton.ac.uk/id/eprint/419800
ISSN: 0094-8276
PURE UUID: 06f2e8ac-a33d-414f-aaf5-9ec1b490fd41
ORCID for A. L. Annett: ORCID iD orcid.org/0000-0002-3730-2438
ORCID for M. Lohan: ORCID iD orcid.org/0000-0002-5340-3108

Catalogue record

Date deposited: 20 Apr 2018 16:30
Last modified: 26 Nov 2021 03:11

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Contributors

Author: D. Rusiecka
Author: M. Gledhill
Author: A. Milne
Author: A. L. Annett ORCID iD
Author: S. Atkinson
Author: A. Birchill
Author: J. Karstensen
Author: M. Lohan ORCID iD
Author: C. Mariez
Author: R. Middag
Author: J. M. Rolison
Author: T. Tanhua
Author: S. Ussher
Author: D. Connelly

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