On the potential fingerprint of the Antarctic ozone hole in ice-core nitrate isotopes: a case study based on a South Pole ice core
International audience Abstract. Column ozone variability has important implications for surface photochemistry and the climate. Ice-core nitrate isotopes are suspected to be influenced by column ozone variability and δ15N(NO3-) has been sought to serve as a proxy of column ozone variability. In thi...
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ftccsdartic:oai:HAL:hal-04418358v1 2024-02-11T09:57:12+01:00 On the potential fingerprint of the Antarctic ozone hole in ice-core nitrate isotopes: a case study based on a South Pole ice core Cao, Yanzhi Jiang, Zhuang Alexander, Becky Cole-Dai, Jihong Savarino, Joel Erbland, Joseph Geng, Lei IGE, Université de grenoble Centre National de la Recherche Scientifique (CNRS) 2022-10-18 https://hal.science/hal-04418358 https://doi.org/10.5194/acp-22-13407-2022 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-22-13407-2022 hal-04418358 https://hal.science/hal-04418358 doi:10.5194/acp-22-13407-2022 ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-04418358 Atmospheric Chemistry and Physics, 2022, 22 (20), pp.13407-13422. ⟨10.5194/acp-22-13407-2022⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2022 ftccsdartic https://doi.org/10.5194/acp-22-13407-2022 2024-01-27T23:56:49Z International audience Abstract. Column ozone variability has important implications for surface photochemistry and the climate. Ice-core nitrate isotopes are suspected to be influenced by column ozone variability and δ15N(NO3-) has been sought to serve as a proxy of column ozone variability. In this study, we examined the ability of ice-core nitrate isotopes to reflect column ozone variability by measuring δ15N(NO3-) and Δ17O(NO3-) in a shallow ice core drilled at the South Pole. The ice core covers the period 1944–2005, and during this period δ15N(NO3-) showed large annual variability ((59.2 ± 29.3) ‰ ), but with no apparent response to the Antarctic ozone hole. Utilizing a snow photochemical model, we estimated 6.9 ‰ additional enrichments in δ15N(NO3-) could be caused by the development of the ozone hole. Nevertheless, this enrichment is small and masked by the effects of the snow accumulation rate at the South Pole over the same period of the ozone hole. The Δ17O(NO3-) record has displayed a decreasing trend by ∼ 3.4 ‰ since 1976. This magnitude of change cannot be caused by enhanced post-depositional processing related to the ozone hole. Instead, the Δ17O(NO3-) decrease was more likely due to the proposed decreases in the O3 / HOx ratio in the extratropical Southern Hemisphere. Our results suggest ice-core δ15N(NO3-) is more sensitive to snow accumulation rate than to column ozone, but at sites with a relatively constant snow accumulation rate, information of column ozone variability embedded in δ15N(NO3-) should be retrievable. Article in Journal/Newspaper Antarc* Antarctic ice core South pole South pole Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic South Pole The Antarctic Atmospheric Chemistry and Physics 22 20 13407 13422 |
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 |
[SDE]Environmental Sciences |
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[SDE]Environmental Sciences Cao, Yanzhi Jiang, Zhuang Alexander, Becky Cole-Dai, Jihong Savarino, Joel Erbland, Joseph Geng, Lei On the potential fingerprint of the Antarctic ozone hole in ice-core nitrate isotopes: a case study based on a South Pole ice core |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Abstract. Column ozone variability has important implications for surface photochemistry and the climate. Ice-core nitrate isotopes are suspected to be influenced by column ozone variability and δ15N(NO3-) has been sought to serve as a proxy of column ozone variability. In this study, we examined the ability of ice-core nitrate isotopes to reflect column ozone variability by measuring δ15N(NO3-) and Δ17O(NO3-) in a shallow ice core drilled at the South Pole. The ice core covers the period 1944–2005, and during this period δ15N(NO3-) showed large annual variability ((59.2 ± 29.3) ‰ ), but with no apparent response to the Antarctic ozone hole. Utilizing a snow photochemical model, we estimated 6.9 ‰ additional enrichments in δ15N(NO3-) could be caused by the development of the ozone hole. Nevertheless, this enrichment is small and masked by the effects of the snow accumulation rate at the South Pole over the same period of the ozone hole. The Δ17O(NO3-) record has displayed a decreasing trend by ∼ 3.4 ‰ since 1976. This magnitude of change cannot be caused by enhanced post-depositional processing related to the ozone hole. Instead, the Δ17O(NO3-) decrease was more likely due to the proposed decreases in the O3 / HOx ratio in the extratropical Southern Hemisphere. Our results suggest ice-core δ15N(NO3-) is more sensitive to snow accumulation rate than to column ozone, but at sites with a relatively constant snow accumulation rate, information of column ozone variability embedded in δ15N(NO3-) should be retrievable. |
author2 |
IGE, Université de grenoble Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Cao, Yanzhi Jiang, Zhuang Alexander, Becky Cole-Dai, Jihong Savarino, Joel Erbland, Joseph Geng, Lei |
author_facet |
Cao, Yanzhi Jiang, Zhuang Alexander, Becky Cole-Dai, Jihong Savarino, Joel Erbland, Joseph Geng, Lei |
author_sort |
Cao, Yanzhi |
title |
On the potential fingerprint of the Antarctic ozone hole in ice-core nitrate isotopes: a case study based on a South Pole ice core |
title_short |
On the potential fingerprint of the Antarctic ozone hole in ice-core nitrate isotopes: a case study based on a South Pole ice core |
title_full |
On the potential fingerprint of the Antarctic ozone hole in ice-core nitrate isotopes: a case study based on a South Pole ice core |
title_fullStr |
On the potential fingerprint of the Antarctic ozone hole in ice-core nitrate isotopes: a case study based on a South Pole ice core |
title_full_unstemmed |
On the potential fingerprint of the Antarctic ozone hole in ice-core nitrate isotopes: a case study based on a South Pole ice core |
title_sort |
on the potential fingerprint of the antarctic ozone hole in ice-core nitrate isotopes: a case study based on a south pole ice core |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-04418358 https://doi.org/10.5194/acp-22-13407-2022 |
geographic |
Antarctic South Pole The Antarctic |
geographic_facet |
Antarctic South Pole The Antarctic |
genre |
Antarc* Antarctic ice core South pole South pole |
genre_facet |
Antarc* Antarctic ice core South pole South pole |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-04418358 Atmospheric Chemistry and Physics, 2022, 22 (20), pp.13407-13422. ⟨10.5194/acp-22-13407-2022⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-22-13407-2022 hal-04418358 https://hal.science/hal-04418358 doi:10.5194/acp-22-13407-2022 |
op_doi |
https://doi.org/10.5194/acp-22-13407-2022 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
22 |
container_issue |
20 |
container_start_page |
13407 |
op_container_end_page |
13422 |
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1790609492949336064 |