Oxygen isotope mass balance of atmospheric nitrate at Dome C, East Antarctica, during the OPALE campaign
Variations in the stable oxygen isotope composition of atmospheric nitrate act as novel tools for studying oxidative processes taking place in the troposphere. They provide both qualitative and quantitative constraints on the pathways determining the fate of atmospheric nitrogen oxides (NO + NO2 = N...
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European Geosciences Union
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ftnerc:oai:nora.nerc.ac.uk:511164 2023-05-15T13:49:32+02:00 Oxygen isotope mass balance of atmospheric nitrate at Dome C, East Antarctica, during the OPALE campaign Savarino, J. Vicars, W.C. Legrand, M. Preunkert, S. Jourdain, B. Frey, M.M. Kukui, A. Caillon, N. Gil Roca, J. 2016-03 text http://nora.nerc.ac.uk/id/eprint/511164/ https://nora.nerc.ac.uk/id/eprint/511164/1/Savarino.pdf http://www.atmos-chem-phys.net/16/2659/2016/acp-16-2659-2016.html en eng European Geosciences Union https://nora.nerc.ac.uk/id/eprint/511164/1/Savarino.pdf Savarino, J.; Vicars, W.C.; Legrand, M.; Preunkert, S.; Jourdain, B.; Frey, M.M. orcid:0000-0003-0535-0416 Kukui, A.; Caillon, N.; Gil Roca, J. 2016 Oxygen isotope mass balance of atmospheric nitrate at Dome C, East Antarctica, during the OPALE campaign. Atmospheric Chemistry and Physics, 16. 2659-2673. https://doi.org/10.5194/acp-16-2659-2016 <https://doi.org/10.5194/acp-16-2659-2016> cc_by CC-BY Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.5194/acp-16-2659-2016 2023-02-04T19:41:45Z Variations in the stable oxygen isotope composition of atmospheric nitrate act as novel tools for studying oxidative processes taking place in the troposphere. They provide both qualitative and quantitative constraints on the pathways determining the fate of atmospheric nitrogen oxides (NO + NO2 = NOx). The unique and distinctive 17O-excess (Δ17O = δ17O − 0.52 × δ18O) of ozone, which is transferred to NOx via oxidation, is a particularly useful isotopic fingerprint in studies of NOx transformations. Constraining the propagation of 17O-excess within the NOx cycle is critical in polar areas where there exists the possibility of extending atmospheric investigations to the glacial/interglacial time scale using deep ice core records of nitrate. Here we present measurements of the comprehensive isotopic composition of atmospheric nitrate collected at Dome C (East Antarctic plateau) during the austral summer of 2011/12. Nitrate isotope analysis has been here combined for the first time with key precursors involved in nitrate production (NOx, O3, OH, HO2, RO2, etc.) and direct observations of the transferrable Δ17O of surface ozone, which was measured at Dome C throughout 2012 using our recently developed analytical approach. Assuming that nitrate is mainly produced in Antarctica in summer through the OH + NO2 pathway and using concurrent measurements of OH and NO2, we calculated a Δ17O signature for nitrate in the order of (21–22 ± 3) ‰. These values are lower than the measured values that ranged between 27 and 31 ‰. This discrepancy between expected and observed Δ17O(NO3−) values suggests the existence of an unknown process that contributes significantly to the atmospheric nitrate budget over this east Antarctic region. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica ice core Natural Environment Research Council: NERC Open Research Archive Antarctic East Antarctica Austral Atmospheric Chemistry and Physics 16 4 2659 2673 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Variations in the stable oxygen isotope composition of atmospheric nitrate act as novel tools for studying oxidative processes taking place in the troposphere. They provide both qualitative and quantitative constraints on the pathways determining the fate of atmospheric nitrogen oxides (NO + NO2 = NOx). The unique and distinctive 17O-excess (Δ17O = δ17O − 0.52 × δ18O) of ozone, which is transferred to NOx via oxidation, is a particularly useful isotopic fingerprint in studies of NOx transformations. Constraining the propagation of 17O-excess within the NOx cycle is critical in polar areas where there exists the possibility of extending atmospheric investigations to the glacial/interglacial time scale using deep ice core records of nitrate. Here we present measurements of the comprehensive isotopic composition of atmospheric nitrate collected at Dome C (East Antarctic plateau) during the austral summer of 2011/12. Nitrate isotope analysis has been here combined for the first time with key precursors involved in nitrate production (NOx, O3, OH, HO2, RO2, etc.) and direct observations of the transferrable Δ17O of surface ozone, which was measured at Dome C throughout 2012 using our recently developed analytical approach. Assuming that nitrate is mainly produced in Antarctica in summer through the OH + NO2 pathway and using concurrent measurements of OH and NO2, we calculated a Δ17O signature for nitrate in the order of (21–22 ± 3) ‰. These values are lower than the measured values that ranged between 27 and 31 ‰. This discrepancy between expected and observed Δ17O(NO3−) values suggests the existence of an unknown process that contributes significantly to the atmospheric nitrate budget over this east Antarctic region. |
format |
Article in Journal/Newspaper |
author |
Savarino, J. Vicars, W.C. Legrand, M. Preunkert, S. Jourdain, B. Frey, M.M. Kukui, A. Caillon, N. Gil Roca, J. |
spellingShingle |
Savarino, J. Vicars, W.C. Legrand, M. Preunkert, S. Jourdain, B. Frey, M.M. Kukui, A. Caillon, N. Gil Roca, J. Oxygen isotope mass balance of atmospheric nitrate at Dome C, East Antarctica, during the OPALE campaign |
author_facet |
Savarino, J. Vicars, W.C. Legrand, M. Preunkert, S. Jourdain, B. Frey, M.M. Kukui, A. Caillon, N. Gil Roca, J. |
author_sort |
Savarino, J. |
title |
Oxygen isotope mass balance of atmospheric nitrate at Dome C, East Antarctica, during the OPALE campaign |
title_short |
Oxygen isotope mass balance of atmospheric nitrate at Dome C, East Antarctica, during the OPALE campaign |
title_full |
Oxygen isotope mass balance of atmospheric nitrate at Dome C, East Antarctica, during the OPALE campaign |
title_fullStr |
Oxygen isotope mass balance of atmospheric nitrate at Dome C, East Antarctica, during the OPALE campaign |
title_full_unstemmed |
Oxygen isotope mass balance of atmospheric nitrate at Dome C, East Antarctica, during the OPALE campaign |
title_sort |
oxygen isotope mass balance of atmospheric nitrate at dome c, east antarctica, during the opale campaign |
publisher |
European Geosciences Union |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/511164/ https://nora.nerc.ac.uk/id/eprint/511164/1/Savarino.pdf http://www.atmos-chem-phys.net/16/2659/2016/acp-16-2659-2016.html |
geographic |
Antarctic East Antarctica Austral |
geographic_facet |
Antarctic East Antarctica Austral |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core |
op_relation |
https://nora.nerc.ac.uk/id/eprint/511164/1/Savarino.pdf Savarino, J.; Vicars, W.C.; Legrand, M.; Preunkert, S.; Jourdain, B.; Frey, M.M. orcid:0000-0003-0535-0416 Kukui, A.; Caillon, N.; Gil Roca, J. 2016 Oxygen isotope mass balance of atmospheric nitrate at Dome C, East Antarctica, during the OPALE campaign. Atmospheric Chemistry and Physics, 16. 2659-2673. https://doi.org/10.5194/acp-16-2659-2016 <https://doi.org/10.5194/acp-16-2659-2016> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/acp-16-2659-2016 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
16 |
container_issue |
4 |
container_start_page |
2659 |
op_container_end_page |
2673 |
_version_ |
1766251499167416320 |