Dissolved Pb and Pb isotopes in the North Atlantic from the GEOVIDE transect (GEOTRACES GA-01) and their decadal evolution
During the 2014 GEOVIDE transect, seawater samples were collected for dissolved Pb and Pb isotope analysis. These samples provide a high-resolution “snapshot” of the source regions for the present Pb distribution in the North Atlantic Ocean. Some of these stations were previously occupied for Pb fro...
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Copernicus Publications
2018
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00005033 2023-05-15T16:30:11+02:00 Dissolved Pb and Pb isotopes in the North Atlantic from the GEOVIDE transect (GEOTRACES GA-01) and their decadal evolution Zurbrick, Cheryl M. Boyle, Edward A. Kayser, Richard J. Reuer, Matthew K. Wu, Jingfeng Planquette, Hélène Shelley, Rachel Boutorh, Julia Cheize, Marie Contreira, Leonardo Menzel Barraqueta, Jan-Lukas Lacan, François Sarthou, Géraldine 2018-08 electronic https://doi.org/10.5194/bg-15-4995-2018 https://noa.gwlb.de/receive/cop_mods_00005033 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004990/bg-15-4995-2018.pdf https://bg.copernicus.org/articles/15/4995/2018/bg-15-4995-2018.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-15-4995-2018 https://noa.gwlb.de/receive/cop_mods_00005033 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004990/bg-15-4995-2018.pdf https://bg.copernicus.org/articles/15/4995/2018/bg-15-4995-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/bg-15-4995-2018 2022-02-08T22:59:48Z During the 2014 GEOVIDE transect, seawater samples were collected for dissolved Pb and Pb isotope analysis. These samples provide a high-resolution “snapshot” of the source regions for the present Pb distribution in the North Atlantic Ocean. Some of these stations were previously occupied for Pb from as early as 1981, and we compare the 2014 data with these older data, some of which are reported here for the first time. Lead concentrations were highest in subsurface Mediterranean Water (MW) near the coast of Portugal, which agrees well with other recent observations by the US GEOTRACES program (Noble et al., 2015). The recently formed Labrador Sea Water (LSW) between Greenland and Nova Scotia is much lower in Pb concentration than the older LSW found in the West European Basin due to decreases in Pb emissions into the atmosphere during the past 20 years. Comparison of North Atlantic data from 1989 to 2014 shows decreasing Pb concentrations consistent with decreased anthropogenic inputs, active scavenging, and advection/convection. Although the isotopic composition of northern North Atlantic seawater appears more homogenous compared to previous decades, a clear spatiotemporal trend in isotope ratios is evident over the past 15 years and implies that small changes to atmospheric Pb emissions continue. Emissions data indicate that the relative proportions of US and European Pb sources to the ocean have been relatively uniform during the past 2 decades, while aerosol data may suggest a greater relative proportion of natural mineral Pb. Using our measurements in conjunction with emissions inventories, we support the findings of previous atmospheric analyses that a significant portion of the Pb deposited to the ocean in 2014 was natural, although it is obscured by the much greater solubility of anthropogenic aerosols over natural ones. Article in Journal/Newspaper Greenland Labrador Sea North Atlantic Niedersächsisches Online-Archiv NOA Greenland West European Basin ENVELOPE(-28.000,-28.000,52.750,52.750) Biogeosciences 15 16 4995 5014 |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Zurbrick, Cheryl M. Boyle, Edward A. Kayser, Richard J. Reuer, Matthew K. Wu, Jingfeng Planquette, Hélène Shelley, Rachel Boutorh, Julia Cheize, Marie Contreira, Leonardo Menzel Barraqueta, Jan-Lukas Lacan, François Sarthou, Géraldine Dissolved Pb and Pb isotopes in the North Atlantic from the GEOVIDE transect (GEOTRACES GA-01) and their decadal evolution |
topic_facet |
article Verlagsveröffentlichung |
description |
During the 2014 GEOVIDE transect, seawater samples were collected for dissolved Pb and Pb isotope analysis. These samples provide a high-resolution “snapshot” of the source regions for the present Pb distribution in the North Atlantic Ocean. Some of these stations were previously occupied for Pb from as early as 1981, and we compare the 2014 data with these older data, some of which are reported here for the first time. Lead concentrations were highest in subsurface Mediterranean Water (MW) near the coast of Portugal, which agrees well with other recent observations by the US GEOTRACES program (Noble et al., 2015). The recently formed Labrador Sea Water (LSW) between Greenland and Nova Scotia is much lower in Pb concentration than the older LSW found in the West European Basin due to decreases in Pb emissions into the atmosphere during the past 20 years. Comparison of North Atlantic data from 1989 to 2014 shows decreasing Pb concentrations consistent with decreased anthropogenic inputs, active scavenging, and advection/convection. Although the isotopic composition of northern North Atlantic seawater appears more homogenous compared to previous decades, a clear spatiotemporal trend in isotope ratios is evident over the past 15 years and implies that small changes to atmospheric Pb emissions continue. Emissions data indicate that the relative proportions of US and European Pb sources to the ocean have been relatively uniform during the past 2 decades, while aerosol data may suggest a greater relative proportion of natural mineral Pb. Using our measurements in conjunction with emissions inventories, we support the findings of previous atmospheric analyses that a significant portion of the Pb deposited to the ocean in 2014 was natural, although it is obscured by the much greater solubility of anthropogenic aerosols over natural ones. |
format |
Article in Journal/Newspaper |
author |
Zurbrick, Cheryl M. Boyle, Edward A. Kayser, Richard J. Reuer, Matthew K. Wu, Jingfeng Planquette, Hélène Shelley, Rachel Boutorh, Julia Cheize, Marie Contreira, Leonardo Menzel Barraqueta, Jan-Lukas Lacan, François Sarthou, Géraldine |
author_facet |
Zurbrick, Cheryl M. Boyle, Edward A. Kayser, Richard J. Reuer, Matthew K. Wu, Jingfeng Planquette, Hélène Shelley, Rachel Boutorh, Julia Cheize, Marie Contreira, Leonardo Menzel Barraqueta, Jan-Lukas Lacan, François Sarthou, Géraldine |
author_sort |
Zurbrick, Cheryl M. |
title |
Dissolved Pb and Pb isotopes in the North Atlantic from the GEOVIDE transect (GEOTRACES GA-01) and their decadal evolution |
title_short |
Dissolved Pb and Pb isotopes in the North Atlantic from the GEOVIDE transect (GEOTRACES GA-01) and their decadal evolution |
title_full |
Dissolved Pb and Pb isotopes in the North Atlantic from the GEOVIDE transect (GEOTRACES GA-01) and their decadal evolution |
title_fullStr |
Dissolved Pb and Pb isotopes in the North Atlantic from the GEOVIDE transect (GEOTRACES GA-01) and their decadal evolution |
title_full_unstemmed |
Dissolved Pb and Pb isotopes in the North Atlantic from the GEOVIDE transect (GEOTRACES GA-01) and their decadal evolution |
title_sort |
dissolved pb and pb isotopes in the north atlantic from the geovide transect (geotraces ga-01) and their decadal evolution |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-15-4995-2018 https://noa.gwlb.de/receive/cop_mods_00005033 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004990/bg-15-4995-2018.pdf https://bg.copernicus.org/articles/15/4995/2018/bg-15-4995-2018.pdf |
long_lat |
ENVELOPE(-28.000,-28.000,52.750,52.750) |
geographic |
Greenland West European Basin |
geographic_facet |
Greenland West European Basin |
genre |
Greenland Labrador Sea North Atlantic |
genre_facet |
Greenland Labrador Sea North Atlantic |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-15-4995-2018 https://noa.gwlb.de/receive/cop_mods_00005033 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004990/bg-15-4995-2018.pdf https://bg.copernicus.org/articles/15/4995/2018/bg-15-4995-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/bg-15-4995-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
16 |
container_start_page |
4995 |
op_container_end_page |
5014 |
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1766019897176883200 |