210 Po and 210 Pb distribution, dissolved-particulate exchange rates, and particulate export along the North Atlantic US GEOTRACES GA03 section
International audience Vertical profiles of 210Po and 210Pb in the water column were measured in the dissolved phase (<0.45 µm), and small (0.8–51 µm) and large (>51 µm) particles at seven stations along the US GEOTRACES North Atlantic Zonal Transect (GA03). Mass balance calculations were empl...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hal.archives-ouvertes.fr/hal-01717772 https://hal.archives-ouvertes.fr/hal-01717772/document https://hal.archives-ouvertes.fr/hal-01717772/file/Rigaud%20et%20al.,%20USGTpaper.pdf https://doi.org/10.1016/j.dsr2.2014.11.003 |
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ftccsdartic:oai:HAL:hal-01717772v1 2023-05-15T17:31:37+02:00 210 Po and 210 Pb distribution, dissolved-particulate exchange rates, and particulate export along the North Atlantic US GEOTRACES GA03 section Rigaud, Sylvain Stewart, G. Baskaran, M. Marsan, D. Church, T. Détection, évaluation, gestion des risques CHROniques et éMErgents (CHROME) / Université de Nîmes (CHROME) Université de Nîmes (UNIMES) Queens College New York City University of New York New York (CUNY) Wayne State University Detroit Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) School of Marine Science and Policy University of Delaware Newark 2015 https://hal.archives-ouvertes.fr/hal-01717772 https://hal.archives-ouvertes.fr/hal-01717772/document https://hal.archives-ouvertes.fr/hal-01717772/file/Rigaud%20et%20al.,%20USGTpaper.pdf https://doi.org/10.1016/j.dsr2.2014.11.003 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2014.11.003 hal-01717772 https://hal.archives-ouvertes.fr/hal-01717772 https://hal.archives-ouvertes.fr/hal-01717772/document https://hal.archives-ouvertes.fr/hal-01717772/file/Rigaud%20et%20al.,%20USGTpaper.pdf doi:10.1016/j.dsr2.2014.11.003 info:eu-repo/semantics/OpenAccess ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.archives-ouvertes.fr/hal-01717772 Deep Sea Research Part II: Topical Studies in Oceanography, Elsevier, 2015, 116, pp.60-78. ⟨10.1016/j.dsr2.2014.11.003⟩ [SDE]Environmental Sciences [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.1016/j.dsr2.2014.11.003 2021-10-24T07:14:57Z International audience Vertical profiles of 210Po and 210Pb in the water column were measured in the dissolved phase (<0.45 µm), and small (0.8–51 µm) and large (>51 µm) particles at seven stations along the US GEOTRACES North Atlantic Zonal Transect (GA03). Mass balance calculations were employed to assess nuclide exchange rates at the dissolved-small particle interface and between small and large particles, and to quantify export with settling large particles. In the surface ocean, 210Po scavenging is linearly correlated with the concentration of particulate organic carbon (POC) in large particles, supporting the role of biogenic particle in 210Po bioaccumulation and export. In stations near the coast, this link is more complex due to the variable source of biogenic material and temporal changes in the surface biogeochemical and physical conditions. At depth, 210Po exhibits significant widespread deficit with respect to 210Pb that could in part be attributed to in situ 210Po scavenging and may be related to surface biological productivity. As previously reported the 210Pb scavenging rates in the surface ocean were higher at ocean margins. At depth, 210Pb scavenging increases with depth and eastward due to the increase of adsorption sites available in the benthic layers and to a regional contribution of benthic 210Pb scavenging and/or particle flux, respectively. The benthic nepheloid layer (BNL) and the Hydrothermal TAG plume distinctly enhance 210Pb scavenging due to increased surface adsorption in association with resuspended or freshly formed particles. In contrast, 210Po is not seen to be significantly scavenged in these environments due to its relatively short half-life and the long residence time of particles. Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Deep Sea Research Part II: Topical Studies in Oceanography 116 60 78 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDE]Environmental Sciences [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Rigaud, Sylvain Stewart, G. Baskaran, M. Marsan, D. Church, T. 210 Po and 210 Pb distribution, dissolved-particulate exchange rates, and particulate export along the North Atlantic US GEOTRACES GA03 section |
topic_facet |
[SDE]Environmental Sciences [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Vertical profiles of 210Po and 210Pb in the water column were measured in the dissolved phase (<0.45 µm), and small (0.8–51 µm) and large (>51 µm) particles at seven stations along the US GEOTRACES North Atlantic Zonal Transect (GA03). Mass balance calculations were employed to assess nuclide exchange rates at the dissolved-small particle interface and between small and large particles, and to quantify export with settling large particles. In the surface ocean, 210Po scavenging is linearly correlated with the concentration of particulate organic carbon (POC) in large particles, supporting the role of biogenic particle in 210Po bioaccumulation and export. In stations near the coast, this link is more complex due to the variable source of biogenic material and temporal changes in the surface biogeochemical and physical conditions. At depth, 210Po exhibits significant widespread deficit with respect to 210Pb that could in part be attributed to in situ 210Po scavenging and may be related to surface biological productivity. As previously reported the 210Pb scavenging rates in the surface ocean were higher at ocean margins. At depth, 210Pb scavenging increases with depth and eastward due to the increase of adsorption sites available in the benthic layers and to a regional contribution of benthic 210Pb scavenging and/or particle flux, respectively. The benthic nepheloid layer (BNL) and the Hydrothermal TAG plume distinctly enhance 210Pb scavenging due to increased surface adsorption in association with resuspended or freshly formed particles. In contrast, 210Po is not seen to be significantly scavenged in these environments due to its relatively short half-life and the long residence time of particles. |
author2 |
Détection, évaluation, gestion des risques CHROniques et éMErgents (CHROME) / Université de Nîmes (CHROME) Université de Nîmes (UNIMES) Queens College New York City University of New York New York (CUNY) Wayne State University Detroit Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) School of Marine Science and Policy University of Delaware Newark |
format |
Article in Journal/Newspaper |
author |
Rigaud, Sylvain Stewart, G. Baskaran, M. Marsan, D. Church, T. |
author_facet |
Rigaud, Sylvain Stewart, G. Baskaran, M. Marsan, D. Church, T. |
author_sort |
Rigaud, Sylvain |
title |
210 Po and 210 Pb distribution, dissolved-particulate exchange rates, and particulate export along the North Atlantic US GEOTRACES GA03 section |
title_short |
210 Po and 210 Pb distribution, dissolved-particulate exchange rates, and particulate export along the North Atlantic US GEOTRACES GA03 section |
title_full |
210 Po and 210 Pb distribution, dissolved-particulate exchange rates, and particulate export along the North Atlantic US GEOTRACES GA03 section |
title_fullStr |
210 Po and 210 Pb distribution, dissolved-particulate exchange rates, and particulate export along the North Atlantic US GEOTRACES GA03 section |
title_full_unstemmed |
210 Po and 210 Pb distribution, dissolved-particulate exchange rates, and particulate export along the North Atlantic US GEOTRACES GA03 section |
title_sort |
210 po and 210 pb distribution, dissolved-particulate exchange rates, and particulate export along the north atlantic us geotraces ga03 section |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.archives-ouvertes.fr/hal-01717772 https://hal.archives-ouvertes.fr/hal-01717772/document https://hal.archives-ouvertes.fr/hal-01717772/file/Rigaud%20et%20al.,%20USGTpaper.pdf https://doi.org/10.1016/j.dsr2.2014.11.003 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.archives-ouvertes.fr/hal-01717772 Deep Sea Research Part II: Topical Studies in Oceanography, Elsevier, 2015, 116, pp.60-78. ⟨10.1016/j.dsr2.2014.11.003⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2014.11.003 hal-01717772 https://hal.archives-ouvertes.fr/hal-01717772 https://hal.archives-ouvertes.fr/hal-01717772/document https://hal.archives-ouvertes.fr/hal-01717772/file/Rigaud%20et%20al.,%20USGTpaper.pdf doi:10.1016/j.dsr2.2014.11.003 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2014.11.003 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
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116 |
container_start_page |
60 |
op_container_end_page |
78 |
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