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...
Published in: | Biogeosciences |
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Language: | English |
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Copernicus Gesellschaft Mbh
2018
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Online Access: | https://archimer.ifremer.fr/doc/00456/56760/58607.pdf https://archimer.ifremer.fr/doc/00456/56760/58609.pdf https://archimer.ifremer.fr/doc/00456/56760/58611.pdf https://archimer.ifremer.fr/doc/00456/56760/58612.pdf https://doi.org/10.5194/bg-15-4995-2018 https://archimer.ifremer.fr/doc/00456/56760/ |
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ftarchimer:oai:archimer.ifremer.fr:56760 2023-05-15T16:30:02+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, Jinfeng Planquette, Helene Shelley, Rachel Boutorh, Julia Cheize, Marie Contreira, Leonardo Barraqueta, Jan-lukas Menzel Lacan, Francois Sarthou, Geraldine 2018-08 application/pdf https://archimer.ifremer.fr/doc/00456/56760/58607.pdf https://archimer.ifremer.fr/doc/00456/56760/58609.pdf https://archimer.ifremer.fr/doc/00456/56760/58611.pdf https://archimer.ifremer.fr/doc/00456/56760/58612.pdf https://doi.org/10.5194/bg-15-4995-2018 https://archimer.ifremer.fr/doc/00456/56760/ eng eng Copernicus Gesellschaft Mbh https://archimer.ifremer.fr/doc/00456/56760/58607.pdf https://archimer.ifremer.fr/doc/00456/56760/58609.pdf https://archimer.ifremer.fr/doc/00456/56760/58611.pdf https://archimer.ifremer.fr/doc/00456/56760/58612.pdf doi:10.5194/bg-15-4995-2018 https://archimer.ifremer.fr/doc/00456/56760/ Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License info:eu-repo/semantics/openAccess restricted use CC-BY Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2018-08 , Vol. 15 , N. 16 , P. 4995-5014 text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.5194/bg-15-4995-2018 2021-09-23T20:31:34Z 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 Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Greenland West European Basin ENVELOPE(-28.000,-28.000,52.750,52.750) Biogeosciences 15 16 4995 5014 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
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, Jinfeng Planquette, Helene Shelley, Rachel Boutorh, Julia Cheize, Marie Contreira, Leonardo Barraqueta, Jan-lukas Menzel Lacan, Francois Sarthou, Geraldine |
spellingShingle |
Zurbrick, Cheryl M. Boyle, Edward A. Kayser, Richard J. Reuer, Matthew K. Wu, Jinfeng Planquette, Helene Shelley, Rachel Boutorh, Julia Cheize, Marie Contreira, Leonardo Barraqueta, Jan-lukas Menzel Lacan, Francois Sarthou, Geraldine Dissolved Pb and Pb isotopes in the North Atlantic from the GEOVIDE transect (GEOTRACES GA-01) and their decadal evolution |
author_facet |
Zurbrick, Cheryl M. Boyle, Edward A. Kayser, Richard J. Reuer, Matthew K. Wu, Jinfeng Planquette, Helene Shelley, Rachel Boutorh, Julia Cheize, Marie Contreira, Leonardo Barraqueta, Jan-lukas Menzel Lacan, Francois Sarthou, Geraldine |
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 Gesellschaft Mbh |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00456/56760/58607.pdf https://archimer.ifremer.fr/doc/00456/56760/58609.pdf https://archimer.ifremer.fr/doc/00456/56760/58611.pdf https://archimer.ifremer.fr/doc/00456/56760/58612.pdf https://doi.org/10.5194/bg-15-4995-2018 https://archimer.ifremer.fr/doc/00456/56760/ |
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_source |
Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2018-08 , Vol. 15 , N. 16 , P. 4995-5014 |
op_relation |
https://archimer.ifremer.fr/doc/00456/56760/58607.pdf https://archimer.ifremer.fr/doc/00456/56760/58609.pdf https://archimer.ifremer.fr/doc/00456/56760/58611.pdf https://archimer.ifremer.fr/doc/00456/56760/58612.pdf doi:10.5194/bg-15-4995-2018 https://archimer.ifremer.fr/doc/00456/56760/ |
op_rights |
Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/bg-15-4995-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
16 |
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4995 |
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5014 |
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1766019752792162304 |