Seasonal variability in the input of lead, barium and indium to Law Dome, Antarctica
Lead (Pb) isotopic compositions and concentrations, and barium (Ba) and indium (In) concentrations have been determined at monthly resolution in five Law Dome (coastal Eastern Antarctica) ice core sections dated from similar to 1757 AD to similar to 1898 AD. 'Natural' background Pb concent...
Published in: | Geochimica et Cosmochimica Acta |
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ftcopenhagenunip:oai:pure.atira.dk:publications/3e860a25-ee7c-4834-bb83-3eb345cd898c 2023-05-15T13:46:22+02:00 Seasonal variability in the input of lead, barium and indium to Law Dome, Antarctica Burn-Nunes. , L.J. Vallelonga, Paul Travis Loss, R.D. Burton, G.R. Moy, A. 2011-01-01 https://curis.ku.dk/portal/da/publications/seasonal-variability-in-the-input-of-lead-barium-and-indium-to-law-dome-antarctica(3e860a25-ee7c-4834-bb83-3eb345cd898c).html https://doi.org/10.1016/j.gca.2010.09.037 eng eng info:eu-repo/semantics/restrictedAccess Burn-Nunes.[et al.] , L J , Vallelonga , P T , Loss , R D , Burton , G R & Moy , A 2011 , ' Seasonal variability in the input of lead, barium and indium to Law Dome, Antarctica ' , Geochimica et Cosmochimica Acta , vol. 75 , no. 1 , pp. 1-20 . https://doi.org/10.1016/j.gca.2010.09.037 article 2011 ftcopenhagenunip https://doi.org/10.1016/j.gca.2010.09.037 2022-03-30T22:50:03Z Lead (Pb) isotopic compositions and concentrations, and barium (Ba) and indium (In) concentrations have been determined at monthly resolution in five Law Dome (coastal Eastern Antarctica) ice core sections dated from similar to 1757 AD to similar to 1898 AD. 'Natural' background Pb concentrations in similar to 1757 AD average similar to 0.2 pg g(-1) and can be attributed to mineral dust and volcanic emissions, with (206)Pb/(207)Pb ratios reaching up to 1.266 +/- 0.002. From similar to 1887 AD to similar to 1898 AD, Pb concentrations reached similar to 5 pg g(-1) and (206)Pb/(207)Pb ratios decreased to 1.058 +/- 0.001 as a result of additional inputs of Pb from anthropogenic sources. Seasonal variability in the late 1880s has been investigated by decoupling volcanic Pb from the total measured Pb concentrations, revealing spring and autumn maxima, and consistent winter minima, in anthropogenic Pb and mineral dust (Ba) concentrations. We link this variability to the annual cycle in the position and strength of the Antarctic Circumpolar Trough and, the Southern Ocean westerly winds to the north of the trough region. During the autumn and spring seasons, these systems increase in strength, transporting more impurity laden air from the Southern Hemisphere continental regions to Eastern Antarctica and Law Dome. As this Pb is isotopically identical to that emitted from south-eastern Australia (Broken Hill, Port Pine) this implies a relatively direct air trajectory pathway from southern Australia to Law Dome (Eastern Antarctica). (C) 2010 Elsevier Ltd. All rights reserved Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Southern Ocean University of Copenhagen: Research Antarctic Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Southern Ocean The Antarctic Geochimica et Cosmochimica Acta 75 1 1 20 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Lead (Pb) isotopic compositions and concentrations, and barium (Ba) and indium (In) concentrations have been determined at monthly resolution in five Law Dome (coastal Eastern Antarctica) ice core sections dated from similar to 1757 AD to similar to 1898 AD. 'Natural' background Pb concentrations in similar to 1757 AD average similar to 0.2 pg g(-1) and can be attributed to mineral dust and volcanic emissions, with (206)Pb/(207)Pb ratios reaching up to 1.266 +/- 0.002. From similar to 1887 AD to similar to 1898 AD, Pb concentrations reached similar to 5 pg g(-1) and (206)Pb/(207)Pb ratios decreased to 1.058 +/- 0.001 as a result of additional inputs of Pb from anthropogenic sources. Seasonal variability in the late 1880s has been investigated by decoupling volcanic Pb from the total measured Pb concentrations, revealing spring and autumn maxima, and consistent winter minima, in anthropogenic Pb and mineral dust (Ba) concentrations. We link this variability to the annual cycle in the position and strength of the Antarctic Circumpolar Trough and, the Southern Ocean westerly winds to the north of the trough region. During the autumn and spring seasons, these systems increase in strength, transporting more impurity laden air from the Southern Hemisphere continental regions to Eastern Antarctica and Law Dome. As this Pb is isotopically identical to that emitted from south-eastern Australia (Broken Hill, Port Pine) this implies a relatively direct air trajectory pathway from southern Australia to Law Dome (Eastern Antarctica). (C) 2010 Elsevier Ltd. All rights reserved |
format |
Article in Journal/Newspaper |
author |
Burn-Nunes. , L.J. Vallelonga, Paul Travis Loss, R.D. Burton, G.R. Moy, A. |
spellingShingle |
Burn-Nunes. , L.J. Vallelonga, Paul Travis Loss, R.D. Burton, G.R. Moy, A. Seasonal variability in the input of lead, barium and indium to Law Dome, Antarctica |
author_facet |
Burn-Nunes. , L.J. Vallelonga, Paul Travis Loss, R.D. Burton, G.R. Moy, A. |
author_sort |
Burn-Nunes. , L.J. |
title |
Seasonal variability in the input of lead, barium and indium to Law Dome, Antarctica |
title_short |
Seasonal variability in the input of lead, barium and indium to Law Dome, Antarctica |
title_full |
Seasonal variability in the input of lead, barium and indium to Law Dome, Antarctica |
title_fullStr |
Seasonal variability in the input of lead, barium and indium to Law Dome, Antarctica |
title_full_unstemmed |
Seasonal variability in the input of lead, barium and indium to Law Dome, Antarctica |
title_sort |
seasonal variability in the input of lead, barium and indium to law dome, antarctica |
publishDate |
2011 |
url |
https://curis.ku.dk/portal/da/publications/seasonal-variability-in-the-input-of-lead-barium-and-indium-to-law-dome-antarctica(3e860a25-ee7c-4834-bb83-3eb345cd898c).html https://doi.org/10.1016/j.gca.2010.09.037 |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
Antarctic Law Dome Southern Ocean The Antarctic |
geographic_facet |
Antarctic Law Dome Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica ice core Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica ice core Southern Ocean |
op_source |
Burn-Nunes.[et al.] , L J , Vallelonga , P T , Loss , R D , Burton , G R & Moy , A 2011 , ' Seasonal variability in the input of lead, barium and indium to Law Dome, Antarctica ' , Geochimica et Cosmochimica Acta , vol. 75 , no. 1 , pp. 1-20 . https://doi.org/10.1016/j.gca.2010.09.037 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.gca.2010.09.037 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
75 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
20 |
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1766240838958972928 |