Comment on “Transport of substantial stratospheric ozone to the surface by a dying typhoon and shallow convection” by Chen et al. (2022)
<p>Chen et al. (2022) analyzed the event of rapid nocturnal O<span class="inline-formula"><sub>3</sub></span> enhancement (NOE) observed on 31 July 2021 at the surface level in the North China Plain and proposed transport of substantial stratosphere ozone to t...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2024-03-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/24/3759/2024/acp-24-3759-2024.pdf |
| _version_ | 1797244431949103104 |
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| author | X. Zheng W. Yang Y. Sun Y. Sun C. Geng Y. Liu X. Xu |
| author_facet | X. Zheng W. Yang Y. Sun Y. Sun C. Geng Y. Liu X. Xu |
| author_sort | X. Zheng |
| collection | DOAJ |
| description | <p>Chen et al. (2022) analyzed the event of rapid nocturnal O<span class="inline-formula"><sub>3</sub></span> enhancement (NOE) observed on 31 July 2021 at the surface level in the North China Plain and proposed transport of substantial stratosphere ozone to the surface by Typhoon In-fa followed by downdraft of shallow convection as the mechanism of the NOE event. The analysis seems to be valid from the viewpoint of atmospheric physics. This comment revisits the NOE phenomenon on the basis of the China National Environmental Monitoring Center (CNEMC) network data used in Chen et al. (2022), together with the CNEMC data from Zibo (ZB) and O<span class="inline-formula"><sub>3</sub></span>, NO<span class="inline-formula"><sub><i>x</i></sub></span>, PAN (peroxyacetic nitric anhydride), and VOC (volatile organic compound) data from the Zibo supersite operated by the China Research Academy of Environmental Sciences (CRAES). We found (a) O<span class="inline-formula"><sub><i>x</i></sub></span> (O<span class="inline-formula"><sub>3</sub></span> <span class="inline-formula">+</span> NO<span class="inline-formula"><sub>2</sub></span>) levels during the NOE period approaching those of O<span class="inline-formula"><sub>3</sub></span> during 14:00–17:00 LT, (b) levels of PAN and the relationship between O<span class="inline-formula"><sub>3</sub></span> and PAN consistent with dominance of chemical and physical processes within the boundary layer, and (c) estimated photochemical ages of air mass shorter than 1 d and showing no drastic increases during the NOE. We argue that the NOE was not caused by typhoon-induced stratospheric intrusion but originated from fresh photochemical production in the lower troposphere. Our argument is well supported by the analysis of atmospheric transport as well as ground-based remote sensing data.</p> |
| first_indexed | 2024-04-24T19:10:55Z |
| format | Article |
| id | doaj.art-969288cd10a84a7fa01c17d528af6703 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-04-24T19:10:55Z |
| publishDate | 2024-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-969288cd10a84a7fa01c17d528af67032024-03-26T11:35:11ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242024-03-01243759376810.5194/acp-24-3759-2024Comment on “Transport of substantial stratospheric ozone to the surface by a dying typhoon and shallow convection” by Chen et al. (2022)X. Zheng0W. Yang1Y. Sun2Y. Sun3C. Geng4Y. Liu5X. Xu6Institute of Tibetan Plateau Meteorology & Key Laboratory for Atmospheric Chemistry, Chinese Academy of Meteorological Sciences, Beijing 100081, ChinaState Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaInstitute of Tibetan Plateau Meteorology & Key Laboratory for Atmospheric Chemistry, Chinese Academy of Meteorological Sciences, Beijing 100081, ChinaNanjing University of Information Science & Technology, Nanjing, Jiangsu 210044, ChinaState Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaState Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaInstitute of Tibetan Plateau Meteorology & Key Laboratory for Atmospheric Chemistry, Chinese Academy of Meteorological Sciences, Beijing 100081, China<p>Chen et al. (2022) analyzed the event of rapid nocturnal O<span class="inline-formula"><sub>3</sub></span> enhancement (NOE) observed on 31 July 2021 at the surface level in the North China Plain and proposed transport of substantial stratosphere ozone to the surface by Typhoon In-fa followed by downdraft of shallow convection as the mechanism of the NOE event. The analysis seems to be valid from the viewpoint of atmospheric physics. This comment revisits the NOE phenomenon on the basis of the China National Environmental Monitoring Center (CNEMC) network data used in Chen et al. (2022), together with the CNEMC data from Zibo (ZB) and O<span class="inline-formula"><sub>3</sub></span>, NO<span class="inline-formula"><sub><i>x</i></sub></span>, PAN (peroxyacetic nitric anhydride), and VOC (volatile organic compound) data from the Zibo supersite operated by the China Research Academy of Environmental Sciences (CRAES). We found (a) O<span class="inline-formula"><sub><i>x</i></sub></span> (O<span class="inline-formula"><sub>3</sub></span> <span class="inline-formula">+</span> NO<span class="inline-formula"><sub>2</sub></span>) levels during the NOE period approaching those of O<span class="inline-formula"><sub>3</sub></span> during 14:00–17:00 LT, (b) levels of PAN and the relationship between O<span class="inline-formula"><sub>3</sub></span> and PAN consistent with dominance of chemical and physical processes within the boundary layer, and (c) estimated photochemical ages of air mass shorter than 1 d and showing no drastic increases during the NOE. We argue that the NOE was not caused by typhoon-induced stratospheric intrusion but originated from fresh photochemical production in the lower troposphere. Our argument is well supported by the analysis of atmospheric transport as well as ground-based remote sensing data.</p>https://acp.copernicus.org/articles/24/3759/2024/acp-24-3759-2024.pdf |
| spellingShingle | X. Zheng W. Yang Y. Sun Y. Sun C. Geng Y. Liu X. Xu Comment on “Transport of substantial stratospheric ozone to the surface by a dying typhoon and shallow convection” by Chen et al. (2022) Atmospheric Chemistry and Physics |
| title | Comment on “Transport of substantial stratospheric ozone to the surface by a dying typhoon and shallow convection” by Chen et al. (2022) |
| title_full | Comment on “Transport of substantial stratospheric ozone to the surface by a dying typhoon and shallow convection” by Chen et al. (2022) |
| title_fullStr | Comment on “Transport of substantial stratospheric ozone to the surface by a dying typhoon and shallow convection” by Chen et al. (2022) |
| title_full_unstemmed | Comment on “Transport of substantial stratospheric ozone to the surface by a dying typhoon and shallow convection” by Chen et al. (2022) |
| title_short | Comment on “Transport of substantial stratospheric ozone to the surface by a dying typhoon and shallow convection” by Chen et al. (2022) |
| title_sort | comment on transport of substantial stratospheric ozone to the surface by a dying typhoon and shallow convection by chen et al 2022 |
| url | https://acp.copernicus.org/articles/24/3759/2024/acp-24-3759-2024.pdf |
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