An inverse model to correct for the effects of post-depositional processing on ice-core nitrate and its isotopes: model framework and applications at Summit, Greenland, and Dome C, Antarctica
Comprehensive evaluation of the effects of post-depositional processing is a prerequisite for appropriately interpreting ice-core records of nitrate concentration and isotopes. In this study, we developed an inverse model that uses archived snow/ice-core nitrate signals to reconstruct primary nitrat...
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2024
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00073212 2024-05-19T07:30:05+00:00 An inverse model to correct for the effects of post-depositional processing on ice-core nitrate and its isotopes: model framework and applications at Summit, Greenland, and Dome C, Antarctica Jiang, Zhuang Alexander, Becky Savarino, Joel Geng, Lei 2024-04 electronic https://doi.org/10.5194/acp-24-4895-2024 https://noa.gwlb.de/receive/cop_mods_00073212 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071393/acp-24-4895-2024.pdf https://acp.copernicus.org/articles/24/4895/2024/acp-24-4895-2024.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-24-4895-2024 https://noa.gwlb.de/receive/cop_mods_00073212 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071393/acp-24-4895-2024.pdf https://acp.copernicus.org/articles/24/4895/2024/acp-24-4895-2024.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/acp-24-4895-2024 2024-04-29T23:46:10Z Comprehensive evaluation of the effects of post-depositional processing is a prerequisite for appropriately interpreting ice-core records of nitrate concentration and isotopes. In this study, we developed an inverse model that uses archived snow/ice-core nitrate signals to reconstruct primary nitrate flux (i.e., the deposition flux of nitrate to surface snow that originates from long-range transport or stratospheric input) and its isotopes (δ15N and Δ17O). The model was then applied to two polar sites, Summit, Greenland, and Dome C, Antarctica, using measured snowpack nitrate concentration and isotope profiles in the top few meters. At Summit, the model successfully reproduced the observed atmospheric δ15N(NO 3-) and Δ17O(NO 3-) and their seasonality. The model was also able to reasonably reproduce the observed snowpack nitrate profiles at Dome C as well as the skin layer and atmospheric δ15N(NO 3-) and Δ17O(NO 3-) at the annual scale. The calculated Fpri at Summit was 6.9 × 10−6 kgN m2 a−1, and the calculated Δ17O(NO 3-) of Fpri is consistent with atmospheric observations in the Northern Hemisphere. However, the calculated δ15N(NO 3-) of Fpri displays an opposite seasonal pattern to atmospheric observations in the northern mid-latitudes, but it is consistent with observations in two Arctic coastal sites. The calculated Fpri at Dome C varies from 1.5 to 2.2 × 10−6 kgN m−2 a−1, with δ15N(NO 3-) of Fpri varying from 6.2 ‰ to 29.3 ‰ and Δ17O(NO 3-) of Fpri varying from 48.8 ‰ to 52.6 ‰. The calculated Fpri at Dome C is close to the previous estimated stratospheric denitrification flux in Antarctica, and the high δ15N(NO 3-) and Δ17O(NO 3-) of Fpri at Dome C also point towards the dominant role of stratospheric origin of primary nitrate to Dome C. Article in Journal/Newspaper Antarc* Antarctica Arctic Greenland ice core Niedersächsisches Online-Archiv NOA Atmospheric Chemistry and Physics 24 8 4895 4914 |
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article Verlagsveröffentlichung Jiang, Zhuang Alexander, Becky Savarino, Joel Geng, Lei An inverse model to correct for the effects of post-depositional processing on ice-core nitrate and its isotopes: model framework and applications at Summit, Greenland, and Dome C, Antarctica |
topic_facet |
article Verlagsveröffentlichung |
description |
Comprehensive evaluation of the effects of post-depositional processing is a prerequisite for appropriately interpreting ice-core records of nitrate concentration and isotopes. In this study, we developed an inverse model that uses archived snow/ice-core nitrate signals to reconstruct primary nitrate flux (i.e., the deposition flux of nitrate to surface snow that originates from long-range transport or stratospheric input) and its isotopes (δ15N and Δ17O). The model was then applied to two polar sites, Summit, Greenland, and Dome C, Antarctica, using measured snowpack nitrate concentration and isotope profiles in the top few meters. At Summit, the model successfully reproduced the observed atmospheric δ15N(NO 3-) and Δ17O(NO 3-) and their seasonality. The model was also able to reasonably reproduce the observed snowpack nitrate profiles at Dome C as well as the skin layer and atmospheric δ15N(NO 3-) and Δ17O(NO 3-) at the annual scale. The calculated Fpri at Summit was 6.9 × 10−6 kgN m2 a−1, and the calculated Δ17O(NO 3-) of Fpri is consistent with atmospheric observations in the Northern Hemisphere. However, the calculated δ15N(NO 3-) of Fpri displays an opposite seasonal pattern to atmospheric observations in the northern mid-latitudes, but it is consistent with observations in two Arctic coastal sites. The calculated Fpri at Dome C varies from 1.5 to 2.2 × 10−6 kgN m−2 a−1, with δ15N(NO 3-) of Fpri varying from 6.2 ‰ to 29.3 ‰ and Δ17O(NO 3-) of Fpri varying from 48.8 ‰ to 52.6 ‰. The calculated Fpri at Dome C is close to the previous estimated stratospheric denitrification flux in Antarctica, and the high δ15N(NO 3-) and Δ17O(NO 3-) of Fpri at Dome C also point towards the dominant role of stratospheric origin of primary nitrate to Dome C. |
format |
Article in Journal/Newspaper |
author |
Jiang, Zhuang Alexander, Becky Savarino, Joel Geng, Lei |
author_facet |
Jiang, Zhuang Alexander, Becky Savarino, Joel Geng, Lei |
author_sort |
Jiang, Zhuang |
title |
An inverse model to correct for the effects of post-depositional processing on ice-core nitrate and its isotopes: model framework and applications at Summit, Greenland, and Dome C, Antarctica |
title_short |
An inverse model to correct for the effects of post-depositional processing on ice-core nitrate and its isotopes: model framework and applications at Summit, Greenland, and Dome C, Antarctica |
title_full |
An inverse model to correct for the effects of post-depositional processing on ice-core nitrate and its isotopes: model framework and applications at Summit, Greenland, and Dome C, Antarctica |
title_fullStr |
An inverse model to correct for the effects of post-depositional processing on ice-core nitrate and its isotopes: model framework and applications at Summit, Greenland, and Dome C, Antarctica |
title_full_unstemmed |
An inverse model to correct for the effects of post-depositional processing on ice-core nitrate and its isotopes: model framework and applications at Summit, Greenland, and Dome C, Antarctica |
title_sort |
inverse model to correct for the effects of post-depositional processing on ice-core nitrate and its isotopes: model framework and applications at summit, greenland, and dome c, antarctica |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/acp-24-4895-2024 https://noa.gwlb.de/receive/cop_mods_00073212 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071393/acp-24-4895-2024.pdf https://acp.copernicus.org/articles/24/4895/2024/acp-24-4895-2024.pdf |
genre |
Antarc* Antarctica Arctic Greenland ice core |
genre_facet |
Antarc* Antarctica Arctic Greenland ice core |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-24-4895-2024 https://noa.gwlb.de/receive/cop_mods_00073212 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071393/acp-24-4895-2024.pdf https://acp.copernicus.org/articles/24/4895/2024/acp-24-4895-2024.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-24-4895-2024 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
24 |
container_issue |
8 |
container_start_page |
4895 |
op_container_end_page |
4914 |
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1799483626324230144 |