Investigating halogens and MSA in the Southern Hemisphere: A spatial analysis
Sub-Antarctic islands and Antarctic coastal regions provide valuable sites for investigating environmental processes in the Southern Ocean. The fact that these sites are situated within the sea ice zone underscores their significance in investigating the impact of sea ice on the chemical composition...
Published in: | Atmospheric Environment |
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Elsevier
2024
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ftnerc:oai:nora.nerc.ac.uk:536453 2024-02-04T09:55:33+01:00 Investigating halogens and MSA in the Southern Hemisphere: A spatial analysis Segato, Delia Thomas, Elizabeth R. Tetzner, Dieter Jackson, Sarah Moser, Dorothea Elisabeth Turetta, Clara Fernandez, Rafael P. Saiz-Lopez, Alfonso Pedro, Joel Markle, Bradley Spolaor, Andrea 2024-02-15 text http://nora.nerc.ac.uk/id/eprint/536453/ https://nora.nerc.ac.uk/id/eprint/536453/1/1-s2.0-S1352231023007057-main.pdf https://www.sciencedirect.com/science/article/pii/S1352231023007057 en eng Elsevier https://nora.nerc.ac.uk/id/eprint/536453/1/1-s2.0-S1352231023007057-main.pdf Segato, Delia; Thomas, Elizabeth R. orcid:0000-0002-3010-6493 Tetzner, Dieter orcid:0000-0001-7659-8799 Jackson, Sarah; Moser, Dorothea Elisabeth orcid:0000-0001-9085-9713 Turetta, Clara; Fernandez, Rafael P.; Saiz-Lopez, Alfonso; Pedro, Joel; Markle, Bradley; Spolaor, Andrea. 2024 Investigating halogens and MSA in the Southern Hemisphere: A spatial analysis. Atmospheric Environment, 319, 120279. 9, pp. https://doi.org/10.1016/j.atmosenv.2023.120279 <https://doi.org/10.1016/j.atmosenv.2023.120279> cc_by_4 Publication - Article PeerReviewed 2024 ftnerc https://doi.org/10.1016/j.atmosenv.2023.120279 2024-01-05T00:03:05Z Sub-Antarctic islands and Antarctic coastal regions provide valuable sites for investigating environmental processes in the Southern Ocean. The fact that these sites are situated within the sea ice zone underscores their significance in investigating the impact of sea ice on the chemical composition of the boundary layer. In this study we report multi-year average levels of marine aerosols, including bromine, sodium, methanesulphonic acid and iodine, measured in five firn cores collected from sub-Antarctic Islands and coastal Antarctic sites. The records are compared with published Antarctic records to explore the spatial distribution of these species in the Antarctic region and their relationship with sea ice variability. Being mainly sourced from sea-salt aerosols, sodium and bromine exhibit the largest concentrations in the sub-Antarctic region, with progressively reduced deposition from the coast towards the central Antarctic plateau. Due to its gas-phase chemistry, bromine is depleted with respect to sodium in the sub-Antarctic sites. Bromine emitted in the form of sea-salt aerosols undergoes multi-phase recycling in the lower troposphere and, together with gas-phase bromine emitted from sea ice, is likely to be transported away from the source, depositing in enriched concentrations in the plateau compared to the Br/Na sea-water mass ratio. Similarly to bromine and sodium, methanesulphonic acid and iodine are found in higher concentrations in the sub-Antarctic sites, especially where the ocean is sea ice-covered during spring as primary production is stronger than in the ice-free ocean. Sea-salt mediated recycling of gas-phase iodine enhances its atmospheric lifetime, delivering enriched iodine depositions to the Antarctic plateau. Depicting the spatial distribution of these elements is of great importance for understanding the processes delivering these impurities around Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic Atmospheric Environment 319 120279 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Sub-Antarctic islands and Antarctic coastal regions provide valuable sites for investigating environmental processes in the Southern Ocean. The fact that these sites are situated within the sea ice zone underscores their significance in investigating the impact of sea ice on the chemical composition of the boundary layer. In this study we report multi-year average levels of marine aerosols, including bromine, sodium, methanesulphonic acid and iodine, measured in five firn cores collected from sub-Antarctic Islands and coastal Antarctic sites. The records are compared with published Antarctic records to explore the spatial distribution of these species in the Antarctic region and their relationship with sea ice variability. Being mainly sourced from sea-salt aerosols, sodium and bromine exhibit the largest concentrations in the sub-Antarctic region, with progressively reduced deposition from the coast towards the central Antarctic plateau. Due to its gas-phase chemistry, bromine is depleted with respect to sodium in the sub-Antarctic sites. Bromine emitted in the form of sea-salt aerosols undergoes multi-phase recycling in the lower troposphere and, together with gas-phase bromine emitted from sea ice, is likely to be transported away from the source, depositing in enriched concentrations in the plateau compared to the Br/Na sea-water mass ratio. Similarly to bromine and sodium, methanesulphonic acid and iodine are found in higher concentrations in the sub-Antarctic sites, especially where the ocean is sea ice-covered during spring as primary production is stronger than in the ice-free ocean. Sea-salt mediated recycling of gas-phase iodine enhances its atmospheric lifetime, delivering enriched iodine depositions to the Antarctic plateau. Depicting the spatial distribution of these elements is of great importance for understanding the processes delivering these impurities around Antarctica. |
format |
Article in Journal/Newspaper |
author |
Segato, Delia Thomas, Elizabeth R. Tetzner, Dieter Jackson, Sarah Moser, Dorothea Elisabeth Turetta, Clara Fernandez, Rafael P. Saiz-Lopez, Alfonso Pedro, Joel Markle, Bradley Spolaor, Andrea |
spellingShingle |
Segato, Delia Thomas, Elizabeth R. Tetzner, Dieter Jackson, Sarah Moser, Dorothea Elisabeth Turetta, Clara Fernandez, Rafael P. Saiz-Lopez, Alfonso Pedro, Joel Markle, Bradley Spolaor, Andrea Investigating halogens and MSA in the Southern Hemisphere: A spatial analysis |
author_facet |
Segato, Delia Thomas, Elizabeth R. Tetzner, Dieter Jackson, Sarah Moser, Dorothea Elisabeth Turetta, Clara Fernandez, Rafael P. Saiz-Lopez, Alfonso Pedro, Joel Markle, Bradley Spolaor, Andrea |
author_sort |
Segato, Delia |
title |
Investigating halogens and MSA in the Southern Hemisphere: A spatial analysis |
title_short |
Investigating halogens and MSA in the Southern Hemisphere: A spatial analysis |
title_full |
Investigating halogens and MSA in the Southern Hemisphere: A spatial analysis |
title_fullStr |
Investigating halogens and MSA in the Southern Hemisphere: A spatial analysis |
title_full_unstemmed |
Investigating halogens and MSA in the Southern Hemisphere: A spatial analysis |
title_sort |
investigating halogens and msa in the southern hemisphere: a spatial analysis |
publisher |
Elsevier |
publishDate |
2024 |
url |
http://nora.nerc.ac.uk/id/eprint/536453/ https://nora.nerc.ac.uk/id/eprint/536453/1/1-s2.0-S1352231023007057-main.pdf https://www.sciencedirect.com/science/article/pii/S1352231023007057 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/536453/1/1-s2.0-S1352231023007057-main.pdf Segato, Delia; Thomas, Elizabeth R. orcid:0000-0002-3010-6493 Tetzner, Dieter orcid:0000-0001-7659-8799 Jackson, Sarah; Moser, Dorothea Elisabeth orcid:0000-0001-9085-9713 Turetta, Clara; Fernandez, Rafael P.; Saiz-Lopez, Alfonso; Pedro, Joel; Markle, Bradley; Spolaor, Andrea. 2024 Investigating halogens and MSA in the Southern Hemisphere: A spatial analysis. Atmospheric Environment, 319, 120279. 9, pp. https://doi.org/10.1016/j.atmosenv.2023.120279 <https://doi.org/10.1016/j.atmosenv.2023.120279> |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1016/j.atmosenv.2023.120279 |
container_title |
Atmospheric Environment |
container_volume |
319 |
container_start_page |
120279 |
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1789959569856790528 |