Mechanisms of Pb supply and removal in two remote (sub-)polar ocean regions
Highlights • Elevated concentrations of surface DPb near South Georgia in the Southern Ocean originated from glacial flour • DPb in the open ocean North Atlantic and Southern Ocean originate from dust particles delivered from Patagonia and Northern Hemisphere • Scavenging of DPb onto biogenic partic...
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Online Access: | https://oceanrep.geomar.de/id/eprint/48046/ https://oceanrep.geomar.de/id/eprint/48046/1/Schlosser.pdf https://doi.org/10.1016/j.marpolbul.2019.110659 |
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ftoceanrep:oai:oceanrep.geomar.de:48046 2023-05-15T17:28:44+02:00 Mechanisms of Pb supply and removal in two remote (sub-)polar ocean regions Schlosser, Christian Garbe-Schönberg, Dieter 2019-12 text https://oceanrep.geomar.de/id/eprint/48046/ https://oceanrep.geomar.de/id/eprint/48046/1/Schlosser.pdf https://doi.org/10.1016/j.marpolbul.2019.110659 en eng Elsevier https://oceanrep.geomar.de/id/eprint/48046/1/Schlosser.pdf Schlosser, C. and Garbe-Schönberg, D. (2019) Mechanisms of Pb supply and removal in two remote (sub-)polar ocean regions. Marine Pollution Bulletin, 149 (Article number 110659). DOI 10.1016/j.marpolbul.2019.110659 <https://doi.org/10.1016/j.marpolbul.2019.110659>. doi:10.1016/j.marpolbul.2019.110659 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2019 ftoceanrep https://doi.org/10.1016/j.marpolbul.2019.110659 2023-04-07T15:47:44Z Highlights • Elevated concentrations of surface DPb near South Georgia in the Southern Ocean originated from glacial flour • DPb in the open ocean North Atlantic and Southern Ocean originate from dust particles delivered from Patagonia and Northern Hemisphere • Scavenging of DPb onto biogenic particles formed during spatially confined phytoplankton blooms leads to dissolved Pb removal Abstract Today, four decades past peak anthropogenic lead emissions in the 1970s, dissolved lead (DPb) concentrations in the surface ocean remain elevated. To constrain contemporary sources and sinks of DPb, we studied high latitude surface waters of the North Atlantic and the Southern Ocean. We observed high concentrations of surface DPb (46 pmol kg-1) near South Georgia in the Southern Ocean, sourced from glacial flour, while offshore DPb concentrations of 3–9 pmol kg-1 were attributable to aeolian Pb inputs mainly from Patagonia. Dissolved Pb in the North Atlantic (4–29 pmol kg-1) originated from aeolian particles from Northern Hemisphere sources. Extremely low DPb concentrations of <5 pmol kg-1 found in both polar regions were the result of scavenging of DPb onto biogenic particles formed during spatially confined phytoplankton blooms, indicating that changes in phytoplankton abundance may alter the residence time and distribution of DPb in the surface ocean. Article in Journal/Newspaper North Atlantic Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Patagonia Southern Ocean Marine Pollution Bulletin 149 110659 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Highlights • Elevated concentrations of surface DPb near South Georgia in the Southern Ocean originated from glacial flour • DPb in the open ocean North Atlantic and Southern Ocean originate from dust particles delivered from Patagonia and Northern Hemisphere • Scavenging of DPb onto biogenic particles formed during spatially confined phytoplankton blooms leads to dissolved Pb removal Abstract Today, four decades past peak anthropogenic lead emissions in the 1970s, dissolved lead (DPb) concentrations in the surface ocean remain elevated. To constrain contemporary sources and sinks of DPb, we studied high latitude surface waters of the North Atlantic and the Southern Ocean. We observed high concentrations of surface DPb (46 pmol kg-1) near South Georgia in the Southern Ocean, sourced from glacial flour, while offshore DPb concentrations of 3–9 pmol kg-1 were attributable to aeolian Pb inputs mainly from Patagonia. Dissolved Pb in the North Atlantic (4–29 pmol kg-1) originated from aeolian particles from Northern Hemisphere sources. Extremely low DPb concentrations of <5 pmol kg-1 found in both polar regions were the result of scavenging of DPb onto biogenic particles formed during spatially confined phytoplankton blooms, indicating that changes in phytoplankton abundance may alter the residence time and distribution of DPb in the surface ocean. |
format |
Article in Journal/Newspaper |
author |
Schlosser, Christian Garbe-Schönberg, Dieter |
spellingShingle |
Schlosser, Christian Garbe-Schönberg, Dieter Mechanisms of Pb supply and removal in two remote (sub-)polar ocean regions |
author_facet |
Schlosser, Christian Garbe-Schönberg, Dieter |
author_sort |
Schlosser, Christian |
title |
Mechanisms of Pb supply and removal in two remote (sub-)polar ocean regions |
title_short |
Mechanisms of Pb supply and removal in two remote (sub-)polar ocean regions |
title_full |
Mechanisms of Pb supply and removal in two remote (sub-)polar ocean regions |
title_fullStr |
Mechanisms of Pb supply and removal in two remote (sub-)polar ocean regions |
title_full_unstemmed |
Mechanisms of Pb supply and removal in two remote (sub-)polar ocean regions |
title_sort |
mechanisms of pb supply and removal in two remote (sub-)polar ocean regions |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://oceanrep.geomar.de/id/eprint/48046/ https://oceanrep.geomar.de/id/eprint/48046/1/Schlosser.pdf https://doi.org/10.1016/j.marpolbul.2019.110659 |
geographic |
Patagonia Southern Ocean |
geographic_facet |
Patagonia Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/48046/1/Schlosser.pdf Schlosser, C. and Garbe-Schönberg, D. (2019) Mechanisms of Pb supply and removal in two remote (sub-)polar ocean regions. Marine Pollution Bulletin, 149 (Article number 110659). DOI 10.1016/j.marpolbul.2019.110659 <https://doi.org/10.1016/j.marpolbul.2019.110659>. doi:10.1016/j.marpolbul.2019.110659 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.marpolbul.2019.110659 |
container_title |
Marine Pollution Bulletin |
container_volume |
149 |
container_start_page |
110659 |
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1766121599462801408 |