Organic bromine compounds produced in sea ice in Antarctic winter
During polar springtime, active bromine drives ozone, a greenhouse gas, to near-zero levels. Bromine production and emission in the polar regions have so far been assumed to require sunlight. Here, we report measurements of bromocarbons in sea ice, snow, and air during the Antarctic winter that reve...
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ftpubmed:oai:pubmedcentral.nih.gov:6290016 2023-05-15T13:40:41+02:00 Organic bromine compounds produced in sea ice in Antarctic winter Abrahamsson, Katarina Granfors, Anna Ahnoff, Martin Cuevas, Carlos A. Saiz-Lopez, Alfonso 2018-12-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6290016/ http://www.ncbi.nlm.nih.gov/pubmed/30538229 https://doi.org/10.1038/s41467-018-07062-8 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6290016/ http://www.ncbi.nlm.nih.gov/pubmed/30538229 http://dx.doi.org/10.1038/s41467-018-07062-8 © The Author(s) 2018 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/. CC-BY Article Text 2018 ftpubmed https://doi.org/10.1038/s41467-018-07062-8 2018-12-16T01:36:00Z During polar springtime, active bromine drives ozone, a greenhouse gas, to near-zero levels. Bromine production and emission in the polar regions have so far been assumed to require sunlight. Here, we report measurements of bromocarbons in sea ice, snow, and air during the Antarctic winter that reveal an unexpected new source of organic bromine to the atmosphere during periods of no sunlight. The results show that Antarctic winter sea ice provides 10 times more bromocarbons to the atmosphere than Southern Ocean waters, and substantially more than summer sea ice. The inclusion of these measurements in a global climate model indicates that the emitted bromocarbons will disperse throughout the troposphere in the southern hemisphere and through photochemical degradation to bromine atoms, contribute ~ 10% to the tropospheric reactive bromine budget. Combined together, our results suggest that winter sea ice could potentially be an important source of atmospheric bromine with implications for atmospheric chemistry and climate at a hemispheric scale. Text Antarc* Antarctic Sea ice Southern Ocean PubMed Central (PMC) Antarctic Southern Ocean The Antarctic Nature Communications 9 1 |
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Article Abrahamsson, Katarina Granfors, Anna Ahnoff, Martin Cuevas, Carlos A. Saiz-Lopez, Alfonso Organic bromine compounds produced in sea ice in Antarctic winter |
topic_facet |
Article |
description |
During polar springtime, active bromine drives ozone, a greenhouse gas, to near-zero levels. Bromine production and emission in the polar regions have so far been assumed to require sunlight. Here, we report measurements of bromocarbons in sea ice, snow, and air during the Antarctic winter that reveal an unexpected new source of organic bromine to the atmosphere during periods of no sunlight. The results show that Antarctic winter sea ice provides 10 times more bromocarbons to the atmosphere than Southern Ocean waters, and substantially more than summer sea ice. The inclusion of these measurements in a global climate model indicates that the emitted bromocarbons will disperse throughout the troposphere in the southern hemisphere and through photochemical degradation to bromine atoms, contribute ~ 10% to the tropospheric reactive bromine budget. Combined together, our results suggest that winter sea ice could potentially be an important source of atmospheric bromine with implications for atmospheric chemistry and climate at a hemispheric scale. |
format |
Text |
author |
Abrahamsson, Katarina Granfors, Anna Ahnoff, Martin Cuevas, Carlos A. Saiz-Lopez, Alfonso |
author_facet |
Abrahamsson, Katarina Granfors, Anna Ahnoff, Martin Cuevas, Carlos A. Saiz-Lopez, Alfonso |
author_sort |
Abrahamsson, Katarina |
title |
Organic bromine compounds produced in sea ice in Antarctic winter |
title_short |
Organic bromine compounds produced in sea ice in Antarctic winter |
title_full |
Organic bromine compounds produced in sea ice in Antarctic winter |
title_fullStr |
Organic bromine compounds produced in sea ice in Antarctic winter |
title_full_unstemmed |
Organic bromine compounds produced in sea ice in Antarctic winter |
title_sort |
organic bromine compounds produced in sea ice in antarctic winter |
publisher |
Nature Publishing Group UK |
publishDate |
2018 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6290016/ http://www.ncbi.nlm.nih.gov/pubmed/30538229 https://doi.org/10.1038/s41467-018-07062-8 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6290016/ http://www.ncbi.nlm.nih.gov/pubmed/30538229 http://dx.doi.org/10.1038/s41467-018-07062-8 |
op_rights |
© The Author(s) 2018 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/. |
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CC-BY |
op_doi |
https://doi.org/10.1038/s41467-018-07062-8 |
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Nature Communications |
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9 |
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1 |
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1766138389221867520 |