Influence of total ozone column (TOC) on the occurrence of tropospheric ozone depletion events (ODEs) in the Antarctic
The occurrence of tropospheric ozone depletion events (ODEs) in the Antarctic can be influenced by many factors, such as the total ozone column (TOC). In this study, we analyzed the observational data obtained from ground observation stations and used two numerical models (TUV and KINAL), to discove...
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ftcopernicus:oai:publications.copernicus.org:acp96759 2023-05-15T14:02:18+02:00 Influence of total ozone column (TOC) on the occurrence of tropospheric ozone depletion events (ODEs) in the Antarctic Cao, Le Fan, Linjie Li, Simeng Yang, Shuangyan 2022-03-24 application/pdf https://doi.org/10.5194/acp-22-3875-2022 https://acp.copernicus.org/articles/22/3875/2022/ eng eng doi:10.5194/acp-22-3875-2022 https://acp.copernicus.org/articles/22/3875/2022/ eISSN: 1680-7324 Text 2022 ftcopernicus https://doi.org/10.5194/acp-22-3875-2022 2022-03-28T16:22:21Z The occurrence of tropospheric ozone depletion events (ODEs) in the Antarctic can be influenced by many factors, such as the total ozone column (TOC). In this study, we analyzed the observational data obtained from ground observation stations and used two numerical models (TUV and KINAL), to discover the relationship between the TOC and the occurrence of ODEs in the Antarctic. A sensitivity analysis was also performed on ozone and major bromine species ( BrO , HOBr and HBr ) to find out key photolysis reactions determining the impact on the occurrence of tropospheric ODEs brought by TOC. From the analysis of the observational data and the numerical results, we suggest that the occurrence frequency of ODEs in the Antarctic is negatively associated with TOC, after screening out the impact on ODEs caused by the solar zenith angle (SZA). This negative impact of TOC on the occurrence of ODEs was suggested to be exerted through altering the solar radiation reaching the ground surface and changing the rates of photolysis reactions. Moreover, major ODE accelerating reactions (i.e., photolysis of tropospheric ozone, H 2 O 2 and HCHO ) and decelerating reactions (i.e., photolysis of BrO and HOBr ), which heavily control the start of ODEs, were also identified. We found that when TOC decreases, the major ODE accelerating reactions significantly speed up. In contrast, the major ODE decelerating reactions are only slightly affected. As a result of the different impacts of TOC on photolysis reactions, the occurrence of ODEs depends negatively on TOC. Text Antarc* Antarctic Copernicus Publications: E-Journals Antarctic The Antarctic Atmospheric Chemistry and Physics 22 6 3875 3890 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The occurrence of tropospheric ozone depletion events (ODEs) in the Antarctic can be influenced by many factors, such as the total ozone column (TOC). In this study, we analyzed the observational data obtained from ground observation stations and used two numerical models (TUV and KINAL), to discover the relationship between the TOC and the occurrence of ODEs in the Antarctic. A sensitivity analysis was also performed on ozone and major bromine species ( BrO , HOBr and HBr ) to find out key photolysis reactions determining the impact on the occurrence of tropospheric ODEs brought by TOC. From the analysis of the observational data and the numerical results, we suggest that the occurrence frequency of ODEs in the Antarctic is negatively associated with TOC, after screening out the impact on ODEs caused by the solar zenith angle (SZA). This negative impact of TOC on the occurrence of ODEs was suggested to be exerted through altering the solar radiation reaching the ground surface and changing the rates of photolysis reactions. Moreover, major ODE accelerating reactions (i.e., photolysis of tropospheric ozone, H 2 O 2 and HCHO ) and decelerating reactions (i.e., photolysis of BrO and HOBr ), which heavily control the start of ODEs, were also identified. We found that when TOC decreases, the major ODE accelerating reactions significantly speed up. In contrast, the major ODE decelerating reactions are only slightly affected. As a result of the different impacts of TOC on photolysis reactions, the occurrence of ODEs depends negatively on TOC. |
format |
Text |
author |
Cao, Le Fan, Linjie Li, Simeng Yang, Shuangyan |
spellingShingle |
Cao, Le Fan, Linjie Li, Simeng Yang, Shuangyan Influence of total ozone column (TOC) on the occurrence of tropospheric ozone depletion events (ODEs) in the Antarctic |
author_facet |
Cao, Le Fan, Linjie Li, Simeng Yang, Shuangyan |
author_sort |
Cao, Le |
title |
Influence of total ozone column (TOC) on the occurrence of tropospheric ozone depletion events (ODEs) in the Antarctic |
title_short |
Influence of total ozone column (TOC) on the occurrence of tropospheric ozone depletion events (ODEs) in the Antarctic |
title_full |
Influence of total ozone column (TOC) on the occurrence of tropospheric ozone depletion events (ODEs) in the Antarctic |
title_fullStr |
Influence of total ozone column (TOC) on the occurrence of tropospheric ozone depletion events (ODEs) in the Antarctic |
title_full_unstemmed |
Influence of total ozone column (TOC) on the occurrence of tropospheric ozone depletion events (ODEs) in the Antarctic |
title_sort |
influence of total ozone column (toc) on the occurrence of tropospheric ozone depletion events (odes) in the antarctic |
publishDate |
2022 |
url |
https://doi.org/10.5194/acp-22-3875-2022 https://acp.copernicus.org/articles/22/3875/2022/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-22-3875-2022 https://acp.copernicus.org/articles/22/3875/2022/ |
op_doi |
https://doi.org/10.5194/acp-22-3875-2022 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
22 |
container_issue |
6 |
container_start_page |
3875 |
op_container_end_page |
3890 |
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1766272491760648192 |