Chemical ozone loss and chlorine activation in the Antarctic winters of 2013–2020
The annual formation of an ozone hole in the austral spring has regional and global climate implications. The Antarctic ozone hole has already changed the precipitation, temperature and atmospheric circulation patterns, and thus the surface climate of many regions in the Southern Hemisphere (SH). Th...
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ftcopernicus:oai:publications.copernicus.org:acp111969 2024-09-15T17:41:56+00:00 Chemical ozone loss and chlorine activation in the Antarctic winters of 2013–2020 Roy, Raina Kumar, Pankaj Kuttippurath, Jayanarayanan Lefevre, Franck 2024-02-23 application/pdf https://doi.org/10.5194/acp-24-2377-2024 https://acp.copernicus.org/articles/24/2377/2024/ eng eng doi:10.5194/acp-24-2377-2024 https://acp.copernicus.org/articles/24/2377/2024/ eISSN: 1680-7324 Text 2024 ftcopernicus https://doi.org/10.5194/acp-24-2377-2024 2024-08-28T05:24:15Z The annual formation of an ozone hole in the austral spring has regional and global climate implications. The Antarctic ozone hole has already changed the precipitation, temperature and atmospheric circulation patterns, and thus the surface climate of many regions in the Southern Hemisphere (SH). Therefore, the study of ozone loss variability is important to assess its consequential effects on the climate and public health. Our study uses satellite observations from the Microwave Limb Sounder on Aura and the passive-tracer method to quantify the ozone loss for the past 8 years (2013–2020) in the Antarctic. We observe the highest ozone loss (about 3.5 ppmv) in 2020, owing to the high chlorine activation (about 2.2 ppbv), steady polar vortex, and huge expanses of polar stratospheric clouds (PSCs) ( 12.6×10 6 km 2 ) in the winter. The spring of 2019 also showed a high ozone loss, although the year had a rare minor warming in mid-September. The chlorine activation in 2015 (1.9 ppbv) was the weakest, and the wave forcing from the lower latitudes was very high in 2017 (up to − 60 km s −1 ). The analysis shows significant interannual variability in the Antarctic ozone as compared to the immediate previous decade (2000–2010). The study helps to understand the role of dynamics and chemistry in the interannual variability of ozone depletion over the years. Text Antarc* Antarctic Copernicus Publications: E-Journals Atmospheric Chemistry and Physics 24 4 2377 2386 |
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Copernicus Publications: E-Journals |
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English |
description |
The annual formation of an ozone hole in the austral spring has regional and global climate implications. The Antarctic ozone hole has already changed the precipitation, temperature and atmospheric circulation patterns, and thus the surface climate of many regions in the Southern Hemisphere (SH). Therefore, the study of ozone loss variability is important to assess its consequential effects on the climate and public health. Our study uses satellite observations from the Microwave Limb Sounder on Aura and the passive-tracer method to quantify the ozone loss for the past 8 years (2013–2020) in the Antarctic. We observe the highest ozone loss (about 3.5 ppmv) in 2020, owing to the high chlorine activation (about 2.2 ppbv), steady polar vortex, and huge expanses of polar stratospheric clouds (PSCs) ( 12.6×10 6 km 2 ) in the winter. The spring of 2019 also showed a high ozone loss, although the year had a rare minor warming in mid-September. The chlorine activation in 2015 (1.9 ppbv) was the weakest, and the wave forcing from the lower latitudes was very high in 2017 (up to − 60 km s −1 ). The analysis shows significant interannual variability in the Antarctic ozone as compared to the immediate previous decade (2000–2010). The study helps to understand the role of dynamics and chemistry in the interannual variability of ozone depletion over the years. |
format |
Text |
author |
Roy, Raina Kumar, Pankaj Kuttippurath, Jayanarayanan Lefevre, Franck |
spellingShingle |
Roy, Raina Kumar, Pankaj Kuttippurath, Jayanarayanan Lefevre, Franck Chemical ozone loss and chlorine activation in the Antarctic winters of 2013–2020 |
author_facet |
Roy, Raina Kumar, Pankaj Kuttippurath, Jayanarayanan Lefevre, Franck |
author_sort |
Roy, Raina |
title |
Chemical ozone loss and chlorine activation in the Antarctic winters of 2013–2020 |
title_short |
Chemical ozone loss and chlorine activation in the Antarctic winters of 2013–2020 |
title_full |
Chemical ozone loss and chlorine activation in the Antarctic winters of 2013–2020 |
title_fullStr |
Chemical ozone loss and chlorine activation in the Antarctic winters of 2013–2020 |
title_full_unstemmed |
Chemical ozone loss and chlorine activation in the Antarctic winters of 2013–2020 |
title_sort |
chemical ozone loss and chlorine activation in the antarctic winters of 2013–2020 |
publishDate |
2024 |
url |
https://doi.org/10.5194/acp-24-2377-2024 https://acp.copernicus.org/articles/24/2377/2024/ |
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Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-24-2377-2024 https://acp.copernicus.org/articles/24/2377/2024/ |
op_doi |
https://doi.org/10.5194/acp-24-2377-2024 |
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Atmospheric Chemistry and Physics |
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24 |
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4 |
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2377 |
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2386 |
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1810488251904950272 |