Sunlight-driven nitrate loss records Antarctic surface mass balance
Standard proxies for reconstructing surface mass balance (SMB) in Antarctic ice cores are often inaccurate or coarsely resolved when applied to more complicated environments away from dome summits. Here, we propose an alternative SMB proxy based on photolytic fractionation of nitrogen isotopes in ni...
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ftpubmed:oai:pubmedcentral.nih.gov:9314437 2023-05-15T13:30:32+02:00 Sunlight-driven nitrate loss records Antarctic surface mass balance Akers, Pete D. Savarino, Joël Caillon, Nicolas Servettaz, Aymeric P. M. Le Meur, Emmanuel Magand, Olivier Martins, Jean Agosta, Cécile Crockford, Peter Kobayashi, Kanon Hattori, Shohei Curran, Mark van Ommen, Tas Jong, Lenneke Roberts, Jason L. 2022-07-25 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9314437/ http://www.ncbi.nlm.nih.gov/pubmed/35879324 https://doi.org/10.1038/s41467-022-31855-7 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9314437/ http://www.ncbi.nlm.nih.gov/pubmed/35879324 http://dx.doi.org/10.1038/s41467-022-31855-7 © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . CC-BY Nat Commun Article Text 2022 ftpubmed https://doi.org/10.1038/s41467-022-31855-7 2022-07-31T02:54:42Z Standard proxies for reconstructing surface mass balance (SMB) in Antarctic ice cores are often inaccurate or coarsely resolved when applied to more complicated environments away from dome summits. Here, we propose an alternative SMB proxy based on photolytic fractionation of nitrogen isotopes in nitrate observed at 114 sites throughout East Antarctica. Applying this proxy approach to nitrate in a shallow core drilled at a moderate SMB site (Aurora Basin North), we reconstruct 700 years of SMB changes that agree well with changes estimated from ice core density and upstream surface topography. For the under-sampled transition zones between dome summits and the coast, we show that this proxy can provide past and present SMB values that reflect the immediate local environment and are derived independently from existing techniques. Text Antarc* Antarctic Antarctica East Antarctica ice core PubMed Central (PMC) Antarctic East Antarctica Nature Communications 13 1 |
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Article Akers, Pete D. Savarino, Joël Caillon, Nicolas Servettaz, Aymeric P. M. Le Meur, Emmanuel Magand, Olivier Martins, Jean Agosta, Cécile Crockford, Peter Kobayashi, Kanon Hattori, Shohei Curran, Mark van Ommen, Tas Jong, Lenneke Roberts, Jason L. Sunlight-driven nitrate loss records Antarctic surface mass balance |
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Standard proxies for reconstructing surface mass balance (SMB) in Antarctic ice cores are often inaccurate or coarsely resolved when applied to more complicated environments away from dome summits. Here, we propose an alternative SMB proxy based on photolytic fractionation of nitrogen isotopes in nitrate observed at 114 sites throughout East Antarctica. Applying this proxy approach to nitrate in a shallow core drilled at a moderate SMB site (Aurora Basin North), we reconstruct 700 years of SMB changes that agree well with changes estimated from ice core density and upstream surface topography. For the under-sampled transition zones between dome summits and the coast, we show that this proxy can provide past and present SMB values that reflect the immediate local environment and are derived independently from existing techniques. |
format |
Text |
author |
Akers, Pete D. Savarino, Joël Caillon, Nicolas Servettaz, Aymeric P. M. Le Meur, Emmanuel Magand, Olivier Martins, Jean Agosta, Cécile Crockford, Peter Kobayashi, Kanon Hattori, Shohei Curran, Mark van Ommen, Tas Jong, Lenneke Roberts, Jason L. |
author_facet |
Akers, Pete D. Savarino, Joël Caillon, Nicolas Servettaz, Aymeric P. M. Le Meur, Emmanuel Magand, Olivier Martins, Jean Agosta, Cécile Crockford, Peter Kobayashi, Kanon Hattori, Shohei Curran, Mark van Ommen, Tas Jong, Lenneke Roberts, Jason L. |
author_sort |
Akers, Pete D. |
title |
Sunlight-driven nitrate loss records Antarctic surface mass balance |
title_short |
Sunlight-driven nitrate loss records Antarctic surface mass balance |
title_full |
Sunlight-driven nitrate loss records Antarctic surface mass balance |
title_fullStr |
Sunlight-driven nitrate loss records Antarctic surface mass balance |
title_full_unstemmed |
Sunlight-driven nitrate loss records Antarctic surface mass balance |
title_sort |
sunlight-driven nitrate loss records antarctic surface mass balance |
publisher |
Nature Publishing Group UK |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9314437/ http://www.ncbi.nlm.nih.gov/pubmed/35879324 https://doi.org/10.1038/s41467-022-31855-7 |
geographic |
Antarctic East Antarctica |
geographic_facet |
Antarctic East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core |
op_source |
Nat Commun |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9314437/ http://www.ncbi.nlm.nih.gov/pubmed/35879324 http://dx.doi.org/10.1038/s41467-022-31855-7 |
op_rights |
© The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-022-31855-7 |
container_title |
Nature Communications |
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13 |
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1 |
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1766009690278330368 |