Signature of Arctic surface ozone depletion events in the isotope anomaly (Δ 17 O) of atmospheric nitrate
International audience We report the first measurements of the oxygen isotope anomaly of atmospheric inorganic nitrate from the Arctic. Nitrate samples and complementary data were collected at Alert, Nunavut, Canada (82°30 ' N, 62°19 ' W) in spring 2004. Covering the polar sunrise period,...
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ftccsdartic:oai:HAL:hal-04110213v1 2023-06-18T03:39:00+02:00 Signature of Arctic surface ozone depletion events in the isotope anomaly (Δ 17 O) of atmospheric nitrate Morin, S. Savarino, J. Bekki, S. Gong, S. Bottenheim, J. W. Université Pierre et Marie Curie - Paris 6 (UPMC) 2007 https://hal.science/hal-04110213 https://doi.org/10.5194/acp-7-1451-2007 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-7-1451-2007 hal-04110213 https://hal.science/hal-04110213 BIBCODE: 2007ACP.7.1451M doi:10.5194/acp-7-1451-2007 Atmospheric Chemistry and Physics https://hal.science/hal-04110213 Atmospheric Chemistry and Physics, 2007, 7, pp.1451-1469. ⟨10.5194/acp-7-1451-2007⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2007 ftccsdartic https://doi.org/10.5194/acp-7-1451-2007 2023-06-03T23:53:35Z International audience We report the first measurements of the oxygen isotope anomaly of atmospheric inorganic nitrate from the Arctic. Nitrate samples and complementary data were collected at Alert, Nunavut, Canada (82°30 ' N, 62°19 ' W) in spring 2004. Covering the polar sunrise period, characterized by the occurrence of severe boundary layer ozone depletion events (ODEs), our data show a significant correlation between the variations of atmospheric ozone (O 3 ) mixing ratios and Δ 17 O of nitrate (Δ 17 O(NO - 3 )). This relationship can be expressed as: Δ 17 O(NO - 3 )/‰, =(0.15±0.03)×O 3 /(nmol mol -1 )+(29.7±0.7), with R 2 =0.70(n=12), for Δ 17 O(NO - 3 ) ranging between 29 and 35 ‰. We derive mass-balance equations from chemical reactions operating in the Arctic boundary layer, that describe the evolution of Δ 17 O(NO - 3 ) as a function of the concentrations of reactive species and their isotopic characteristics. Changes in the relative importance of O 3 , RO 2 and BrO in the oxidation of NO during ODEs, and the large isotope anomalies of O 3 and BrO, are the driving force for the variability in the measured Δ 17 O(NO - 3 ) . BrONO 2 hydrolysis is found to be a dominant source of nitrate in the Arctic boundary layer, in agreement with recent modeling studies. Article in Journal/Newspaper Arctic Nunavut Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Nunavut Canada Atmospheric Chemistry and Physics 7 5 1451 1469 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Morin, S. Savarino, J. Bekki, S. Gong, S. Bottenheim, J. W. Signature of Arctic surface ozone depletion events in the isotope anomaly (Δ 17 O) of atmospheric nitrate |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience We report the first measurements of the oxygen isotope anomaly of atmospheric inorganic nitrate from the Arctic. Nitrate samples and complementary data were collected at Alert, Nunavut, Canada (82°30 ' N, 62°19 ' W) in spring 2004. Covering the polar sunrise period, characterized by the occurrence of severe boundary layer ozone depletion events (ODEs), our data show a significant correlation between the variations of atmospheric ozone (O 3 ) mixing ratios and Δ 17 O of nitrate (Δ 17 O(NO - 3 )). This relationship can be expressed as: Δ 17 O(NO - 3 )/‰, =(0.15±0.03)×O 3 /(nmol mol -1 )+(29.7±0.7), with R 2 =0.70(n=12), for Δ 17 O(NO - 3 ) ranging between 29 and 35 ‰. We derive mass-balance equations from chemical reactions operating in the Arctic boundary layer, that describe the evolution of Δ 17 O(NO - 3 ) as a function of the concentrations of reactive species and their isotopic characteristics. Changes in the relative importance of O 3 , RO 2 and BrO in the oxidation of NO during ODEs, and the large isotope anomalies of O 3 and BrO, are the driving force for the variability in the measured Δ 17 O(NO - 3 ) . BrONO 2 hydrolysis is found to be a dominant source of nitrate in the Arctic boundary layer, in agreement with recent modeling studies. |
author2 |
Université Pierre et Marie Curie - Paris 6 (UPMC) |
format |
Article in Journal/Newspaper |
author |
Morin, S. Savarino, J. Bekki, S. Gong, S. Bottenheim, J. W. |
author_facet |
Morin, S. Savarino, J. Bekki, S. Gong, S. Bottenheim, J. W. |
author_sort |
Morin, S. |
title |
Signature of Arctic surface ozone depletion events in the isotope anomaly (Δ 17 O) of atmospheric nitrate |
title_short |
Signature of Arctic surface ozone depletion events in the isotope anomaly (Δ 17 O) of atmospheric nitrate |
title_full |
Signature of Arctic surface ozone depletion events in the isotope anomaly (Δ 17 O) of atmospheric nitrate |
title_fullStr |
Signature of Arctic surface ozone depletion events in the isotope anomaly (Δ 17 O) of atmospheric nitrate |
title_full_unstemmed |
Signature of Arctic surface ozone depletion events in the isotope anomaly (Δ 17 O) of atmospheric nitrate |
title_sort |
signature of arctic surface ozone depletion events in the isotope anomaly (δ 17 o) of atmospheric nitrate |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-04110213 https://doi.org/10.5194/acp-7-1451-2007 |
geographic |
Arctic Nunavut Canada |
geographic_facet |
Arctic Nunavut Canada |
genre |
Arctic Nunavut |
genre_facet |
Arctic Nunavut |
op_source |
Atmospheric Chemistry and Physics https://hal.science/hal-04110213 Atmospheric Chemistry and Physics, 2007, 7, pp.1451-1469. ⟨10.5194/acp-7-1451-2007⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-7-1451-2007 hal-04110213 https://hal.science/hal-04110213 BIBCODE: 2007ACP.7.1451M doi:10.5194/acp-7-1451-2007 |
op_doi |
https://doi.org/10.5194/acp-7-1451-2007 |
container_title |
Atmospheric Chemistry and Physics |
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7 |
container_issue |
5 |
container_start_page |
1451 |
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1469 |
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1769003825385963520 |