Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica
Throughout the year 2001, aerosol samples were collected continuously for 10 to 15 days at the French Antarctic Station Dumont d'Urville (DDU) (66°40' S, l40°0' E, 40 m above mean sea level). The nitrogen and oxygen isotopic ratios of particulate nitrate at DDU exhibit seasonal variat...
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:25138 2023-05-15T13:41:46+02:00 Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica Savarino, J. Kaiser, J. Morin, S. Sigman, D. M. Thiemens, M. H. 2007-04-18 application/pdf https://ueaeprints.uea.ac.uk/id/eprint/25138/ https://ueaeprints.uea.ac.uk/id/eprint/25138/1/23_Savarino_et_al._ACP_2007_Antarctic_nitrate.pdf https://doi.org/10.5194/acp-7-1925-2007 en eng https://ueaeprints.uea.ac.uk/id/eprint/25138/1/23_Savarino_et_al._ACP_2007_Antarctic_nitrate.pdf Savarino, J., Kaiser, J., Morin, S., Sigman, D. M. and Thiemens, M. H. (2007) Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica. Atmospheric Chemistry and Physics, 7 (8). pp. 1925-1945. doi:10.5194/acp-7-1925-2007 Article PeerReviewed 2007 ftuniveastangl https://doi.org/10.5194/acp-7-1925-2007 2023-03-23T23:31:34Z Throughout the year 2001, aerosol samples were collected continuously for 10 to 15 days at the French Antarctic Station Dumont d'Urville (DDU) (66°40' S, l40°0' E, 40 m above mean sea level). The nitrogen and oxygen isotopic ratios of particulate nitrate at DDU exhibit seasonal variations that are among the most extreme observed for nitrate on Earth. In association with concentration measurements, the isotope ratios delineate four distinct periods, broadly consistent with previous studies on Antarctic coastal areas. During austral autumn and early winter (March to mid-July), nitrate concentrations attain a minimum between 10 and 30 ng m−3 (referred to as Period 2). Two local maxima in August (55 ng m−3) and November/December (165 ng m−3) are used to assign Period 3 (mid-July to September) and Period 4 (October to December). Period 1 (January to March) is a transition period between the maximum concentration of Period 4 and the background concentration of Period 2. These seasonal changes are reflected in changes of the nitrogen and oxygen isotope ratios. During Period 2, which is characterized by background concentrations, the isotope ratios are in the range of previous measurements at mid-latitudes: δ18Ovsmow=(77.2±8.6)‰; Δ17O=(29.8±4.4)‰; δ15Nair=(−4.4±5.4)‰ (mean ± one standard deviation). Period 3 is accompanied by a significant increase of the oxygen isotope ratios and a small increase of the nitrogen isotope ratio to δ18Ovsmow=(98.8±13.9)‰; Δ17O=(38.8±4.7)‰ and δ15Nair=(4.3±8.20‰). Period 4 is characterized by a minimum 15N/14N ratio, only matched by one prior study of Antarctic aerosols, and oxygen isotope ratios similar to Period 2: δ18Ovsmow=(77.2±7.7)‰; Δ17O=(31.1±3.2)‰; δ15Nair=(−32.7±8.4)‰. Finally, during Period 1, isotope ratios reach minimum values for oxygen and intermediate values for nitrogen: δ18Ovsmow=63.2±2.5‰; Δ17O=24.0±1.1‰; δ15Nair=−17.9±4.0‰). Based on the measured isotopic composition, known atmospheric transport patterns and the current understanding of kinetics and isotope effects of ... Article in Journal/Newspaper Antarc* Antarctic Antarctica University of East Anglia: UEA Digital Repository Antarctic Austral Dumont d'Urville ENVELOPE(140.017,140.017,-66.667,-66.667) Dumont-d'Urville ENVELOPE(140.013,140.013,-66.667,-66.667) Atmospheric Chemistry and Physics 7 8 1925 1945 |
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Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
language |
English |
description |
Throughout the year 2001, aerosol samples were collected continuously for 10 to 15 days at the French Antarctic Station Dumont d'Urville (DDU) (66°40' S, l40°0' E, 40 m above mean sea level). The nitrogen and oxygen isotopic ratios of particulate nitrate at DDU exhibit seasonal variations that are among the most extreme observed for nitrate on Earth. In association with concentration measurements, the isotope ratios delineate four distinct periods, broadly consistent with previous studies on Antarctic coastal areas. During austral autumn and early winter (March to mid-July), nitrate concentrations attain a minimum between 10 and 30 ng m−3 (referred to as Period 2). Two local maxima in August (55 ng m−3) and November/December (165 ng m−3) are used to assign Period 3 (mid-July to September) and Period 4 (October to December). Period 1 (January to March) is a transition period between the maximum concentration of Period 4 and the background concentration of Period 2. These seasonal changes are reflected in changes of the nitrogen and oxygen isotope ratios. During Period 2, which is characterized by background concentrations, the isotope ratios are in the range of previous measurements at mid-latitudes: δ18Ovsmow=(77.2±8.6)‰; Δ17O=(29.8±4.4)‰; δ15Nair=(−4.4±5.4)‰ (mean ± one standard deviation). Period 3 is accompanied by a significant increase of the oxygen isotope ratios and a small increase of the nitrogen isotope ratio to δ18Ovsmow=(98.8±13.9)‰; Δ17O=(38.8±4.7)‰ and δ15Nair=(4.3±8.20‰). Period 4 is characterized by a minimum 15N/14N ratio, only matched by one prior study of Antarctic aerosols, and oxygen isotope ratios similar to Period 2: δ18Ovsmow=(77.2±7.7)‰; Δ17O=(31.1±3.2)‰; δ15Nair=(−32.7±8.4)‰. Finally, during Period 1, isotope ratios reach minimum values for oxygen and intermediate values for nitrogen: δ18Ovsmow=63.2±2.5‰; Δ17O=24.0±1.1‰; δ15Nair=−17.9±4.0‰). Based on the measured isotopic composition, known atmospheric transport patterns and the current understanding of kinetics and isotope effects of ... |
format |
Article in Journal/Newspaper |
author |
Savarino, J. Kaiser, J. Morin, S. Sigman, D. M. Thiemens, M. H. |
spellingShingle |
Savarino, J. Kaiser, J. Morin, S. Sigman, D. M. Thiemens, M. H. Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica |
author_facet |
Savarino, J. Kaiser, J. Morin, S. Sigman, D. M. Thiemens, M. H. |
author_sort |
Savarino, J. |
title |
Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica |
title_short |
Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica |
title_full |
Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica |
title_fullStr |
Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica |
title_full_unstemmed |
Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica |
title_sort |
nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal antarctica |
publishDate |
2007 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/25138/ https://ueaeprints.uea.ac.uk/id/eprint/25138/1/23_Savarino_et_al._ACP_2007_Antarctic_nitrate.pdf https://doi.org/10.5194/acp-7-1925-2007 |
long_lat |
ENVELOPE(140.017,140.017,-66.667,-66.667) ENVELOPE(140.013,140.013,-66.667,-66.667) |
geographic |
Antarctic Austral Dumont d'Urville Dumont-d'Urville |
geographic_facet |
Antarctic Austral Dumont d'Urville Dumont-d'Urville |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
https://ueaeprints.uea.ac.uk/id/eprint/25138/1/23_Savarino_et_al._ACP_2007_Antarctic_nitrate.pdf Savarino, J., Kaiser, J., Morin, S., Sigman, D. M. and Thiemens, M. H. (2007) Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica. Atmospheric Chemistry and Physics, 7 (8). pp. 1925-1945. doi:10.5194/acp-7-1925-2007 |
op_doi |
https://doi.org/10.5194/acp-7-1925-2007 |
container_title |
Atmospheric Chemistry and Physics |
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7 |
container_issue |
8 |
container_start_page |
1925 |
op_container_end_page |
1945 |
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1766158030135623680 |