The influence of particle concentration and composition on the fractionation of 210 Po and 210 Pb along the North Atlantic GEOTRACES transect GA03
International audience The disequilibrium between 210Po and 210Pb has been used as a proxy for the particle flux from the upper ocean. The particle concentration and composition effect on the partitioning behavior of 210Po and 210Pb is, however, still unclear. Here, we investigate this association b...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://doi.org/10.1016/j.dsr.2017.09.001 https://hal.archives-ouvertes.fr/hal-01662380/file/YiTang%20et%20al_Manuscript_NAZT_Final.pdf https://hal.archives-ouvertes.fr/hal-01662380 |
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fttriple:oai:gotriple.eu:10670/1.6cfyfl 2023-05-15T17:31:22+02:00 The influence of particle concentration and composition on the fractionation of 210 Po and 210 Pb along the North Atlantic GEOTRACES transect GA03 Tang, Yi Stewart, Gillian Lam, Phoebe J. Church, Thomas Rigaud, Sylvain School of Earth and Environmental Sciences Queens New York Queens College New York City University of New York New York (CUNY)-City University of New York New York (CUNY) School of Marine Science and Policy University of Delaware Newark Détection, évaluation, gestion des risques CHROniques et éMErgents (CHROME) / Université de Nîmes (CHROME) Université de Nîmes (UNIMES) 2017-10-01 https://doi.org/10.1016/j.dsr.2017.09.001 https://hal.archives-ouvertes.fr/hal-01662380/file/YiTang%20et%20al_Manuscript_NAZT_Final.pdf https://hal.archives-ouvertes.fr/hal-01662380 en eng HAL CCSD Elsevier hal-01662380 doi:10.1016/j.dsr.2017.09.001 10670/1.6cfyfl https://hal.archives-ouvertes.fr/hal-01662380/file/YiTang%20et%20al_Manuscript_NAZT_Final.pdf https://hal.archives-ouvertes.fr/hal-01662380 Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers Deep Sea Research Part I: Oceanographic Research Papers, Elsevier, 2017, 128, pp.42 - 54. ⟨10.1016/j.dsr.2017.09.001⟩ particle 210 Po particle concentration 210 Pb GEOTRACES North Atlantic Ocean envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.1016/j.dsr.2017.09.001 2023-01-22T17:01:44Z International audience The disequilibrium between 210Po and 210Pb has been used as a proxy for the particle flux from the upper ocean. The particle concentration and composition effect on the partitioning behavior of 210Po and 210Pb is, however, still unclear. Here, we investigate this association by comparing dissolved ( 51 μm) 210Po and 210Pb activity with size-fractionated major particle concentration and composition data from the US GEOTRACES GA03 zonal transect cruises. We observed inverse relationships between partition coefficients (Kd) for the radionuclides and the concentration of suspended particulate matter (SPM) in the water column, known as the “particle concentration effect.” We examined the relationships between 210Po, 210Pb, and particle composition in the top 500m by using Pearson pairwise correlations for individual phases and principal components analysis (PCA) for variations among multiple phases. In addition to these analyses, an end- member mixing model was developed to estimate Kd for 210Po and 210Pb in the small particulate size fraction from the compositional phases. The model predicted the range of observed Kd(Pb) well, but was unable to predict the observed Kd(Po) as consistently, possibly because of the bio-reactive nature of 210Po. Despite this, we found a strong relationship between 210Po and both CaCO3 and POM, as well as between 210Pb and both opal and lithogenic phases. All of our analyses demonstrated that the fractionation of 210Po and 210Pb differed between the coast and open ocean along the GA03 transect. Article in Journal/Newspaper North Atlantic Unknown Deep Sea Research Part I: Oceanographic Research Papers 128 42 54 |
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language |
English |
topic |
particle 210 Po particle concentration 210 Pb GEOTRACES North Atlantic Ocean envir geo |
spellingShingle |
particle 210 Po particle concentration 210 Pb GEOTRACES North Atlantic Ocean envir geo Tang, Yi Stewart, Gillian Lam, Phoebe J. Church, Thomas Rigaud, Sylvain The influence of particle concentration and composition on the fractionation of 210 Po and 210 Pb along the North Atlantic GEOTRACES transect GA03 |
topic_facet |
particle 210 Po particle concentration 210 Pb GEOTRACES North Atlantic Ocean envir geo |
description |
International audience The disequilibrium between 210Po and 210Pb has been used as a proxy for the particle flux from the upper ocean. The particle concentration and composition effect on the partitioning behavior of 210Po and 210Pb is, however, still unclear. Here, we investigate this association by comparing dissolved ( 51 μm) 210Po and 210Pb activity with size-fractionated major particle concentration and composition data from the US GEOTRACES GA03 zonal transect cruises. We observed inverse relationships between partition coefficients (Kd) for the radionuclides and the concentration of suspended particulate matter (SPM) in the water column, known as the “particle concentration effect.” We examined the relationships between 210Po, 210Pb, and particle composition in the top 500m by using Pearson pairwise correlations for individual phases and principal components analysis (PCA) for variations among multiple phases. In addition to these analyses, an end- member mixing model was developed to estimate Kd for 210Po and 210Pb in the small particulate size fraction from the compositional phases. The model predicted the range of observed Kd(Pb) well, but was unable to predict the observed Kd(Po) as consistently, possibly because of the bio-reactive nature of 210Po. Despite this, we found a strong relationship between 210Po and both CaCO3 and POM, as well as between 210Pb and both opal and lithogenic phases. All of our analyses demonstrated that the fractionation of 210Po and 210Pb differed between the coast and open ocean along the GA03 transect. |
author2 |
School of Earth and Environmental Sciences Queens New York Queens College New York City University of New York New York (CUNY)-City University of New York New York (CUNY) School of Marine Science and Policy University of Delaware Newark Détection, évaluation, gestion des risques CHROniques et éMErgents (CHROME) / Université de Nîmes (CHROME) Université de Nîmes (UNIMES) |
format |
Article in Journal/Newspaper |
author |
Tang, Yi Stewart, Gillian Lam, Phoebe J. Church, Thomas Rigaud, Sylvain |
author_facet |
Tang, Yi Stewart, Gillian Lam, Phoebe J. Church, Thomas Rigaud, Sylvain |
author_sort |
Tang, Yi |
title |
The influence of particle concentration and composition on the fractionation of 210 Po and 210 Pb along the North Atlantic GEOTRACES transect GA03 |
title_short |
The influence of particle concentration and composition on the fractionation of 210 Po and 210 Pb along the North Atlantic GEOTRACES transect GA03 |
title_full |
The influence of particle concentration and composition on the fractionation of 210 Po and 210 Pb along the North Atlantic GEOTRACES transect GA03 |
title_fullStr |
The influence of particle concentration and composition on the fractionation of 210 Po and 210 Pb along the North Atlantic GEOTRACES transect GA03 |
title_full_unstemmed |
The influence of particle concentration and composition on the fractionation of 210 Po and 210 Pb along the North Atlantic GEOTRACES transect GA03 |
title_sort |
influence of particle concentration and composition on the fractionation of 210 po and 210 pb along the north atlantic geotraces transect ga03 |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://doi.org/10.1016/j.dsr.2017.09.001 https://hal.archives-ouvertes.fr/hal-01662380/file/YiTang%20et%20al_Manuscript_NAZT_Final.pdf https://hal.archives-ouvertes.fr/hal-01662380 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers Deep Sea Research Part I: Oceanographic Research Papers, Elsevier, 2017, 128, pp.42 - 54. ⟨10.1016/j.dsr.2017.09.001⟩ |
op_relation |
hal-01662380 doi:10.1016/j.dsr.2017.09.001 10670/1.6cfyfl https://hal.archives-ouvertes.fr/hal-01662380/file/YiTang%20et%20al_Manuscript_NAZT_Final.pdf https://hal.archives-ouvertes.fr/hal-01662380 |
op_doi |
https://doi.org/10.1016/j.dsr.2017.09.001 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
128 |
container_start_page |
42 |
op_container_end_page |
54 |
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1766128889047810048 |