Observation-based analysis of ozone production sensitivity for two persistent ozone episodes in Guangdong, China
<p>An observation-based method (OBM) is developed to investigate the sensitivity of ozone formation to precursors during two persistent elevated ozone episodes observed at 77 stations in Guangdong. Average OH concentrations derived at the 77 stations between 08:00 and 13:00 local time stay wit...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-07-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/22/8403/2022/acp-22-8403-2022.pdf |
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| author | K. Song R. Liu R. Liu Y. Wang Y. Wang T. Liu L. Wei Y. Wu J. Zheng J. Zheng B. Wang B. Wang S. C. Liu S. C. Liu |
| author_facet | K. Song R. Liu R. Liu Y. Wang Y. Wang T. Liu L. Wei Y. Wu J. Zheng J. Zheng B. Wang B. Wang S. C. Liu S. C. Liu |
| author_sort | K. Song |
| collection | DOAJ |
| description | <p>An observation-based method (OBM) is developed to
investigate the sensitivity of ozone formation to precursors during two
persistent elevated ozone episodes observed at 77 stations in Guangdong.
Average OH concentrations derived at the 77 stations between 08:00 and 13:00
local time stay within a narrow range of <span class="inline-formula">2.5×10<sup>6</sup></span> to
<span class="inline-formula">5.5×10<sup>6</sup></span> cm<span class="inline-formula"><sup>−3</sup></span> with a weak dependence on the NO<span class="inline-formula"><sub><i>x</i></sub></span>. These
values are in good agreement with OH values observed at a rural station in
the Pearl River Delta (PRD). They also agree well with a box model constrained
by the ambient conditions observed during the two episodes. The OBM has been
used to evaluate the ozone production efficiency, <span class="inline-formula"><i>ε</i></span>(NO<span class="inline-formula"><sub><i>x</i></sub></span> or volatile organic compound,
VOC), defined as the number of O<span class="inline-formula"><sub>3</sub></span> molecules produced per molecule of
NO<span class="inline-formula"><sub><i>x</i></sub></span> (or VOC) oxidized. Average values of <span class="inline-formula"><i>ε</i></span>(NO<span class="inline-formula"><sub><i>x</i></sub></span>) and
<span class="inline-formula"><i>ε</i></span>(VOC) determined by the OBM are 3.0 and 2.1 ppb ppb<span class="inline-formula"><sup>−1</sup></span>,
respectively, and both compared well with values in previous studies.
Approximately 67 % of the station days exhibit ozone formation sensitivity
to NO<span class="inline-formula"><sub><i>x</i></sub></span>, and approximately 20 % of the station days are in the
transitional regime sensitive to both NO<span class="inline-formula"><sub><i>x</i></sub></span> and VOC, and only approximately
13 % of the station days are sensitive to VOC. These results are in
semi-quantitative agreement with the ozone formation sensitivity calculated
by the box model constrained by ambient conditions observed during the two
episodes. However, our OBM results differ from those of most previous
investigations, which suggested that limiting the emission of VOC rather than
NO<span class="inline-formula"><sub><i>x</i></sub></span> would be more effective in reducing ozone reduction in Guangdong.</p> |
| first_indexed | 2024-12-12T07:13:18Z |
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| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-12T07:13:18Z |
| publishDate | 2022-07-01 |
| publisher | Copernicus Publications |
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| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-112d5cd6b94447edbf0a4a533c3190632022-12-22T00:33:35ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242022-07-01228403841610.5194/acp-22-8403-2022Observation-based analysis of ozone production sensitivity for two persistent ozone episodes in Guangdong, ChinaK. Song0R. Liu1R. Liu2Y. Wang3Y. Wang4T. Liu5L. Wei6Y. Wu7J. Zheng8J. Zheng9B. Wang10B. Wang11S. C. Liu12S. C. Liu13Institute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, ChinaInstitute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, ChinaGuangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou, 511443, ChinaInstitute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, ChinaGuangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou, 511443, ChinaInstitute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, ChinaInstitute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, ChinaInstitute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, ChinaInstitute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, ChinaGuangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou, 511443, ChinaInstitute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, ChinaGuangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou, 511443, ChinaInstitute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, ChinaGuangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou, 511443, China<p>An observation-based method (OBM) is developed to investigate the sensitivity of ozone formation to precursors during two persistent elevated ozone episodes observed at 77 stations in Guangdong. Average OH concentrations derived at the 77 stations between 08:00 and 13:00 local time stay within a narrow range of <span class="inline-formula">2.5×10<sup>6</sup></span> to <span class="inline-formula">5.5×10<sup>6</sup></span> cm<span class="inline-formula"><sup>−3</sup></span> with a weak dependence on the NO<span class="inline-formula"><sub><i>x</i></sub></span>. These values are in good agreement with OH values observed at a rural station in the Pearl River Delta (PRD). They also agree well with a box model constrained by the ambient conditions observed during the two episodes. The OBM has been used to evaluate the ozone production efficiency, <span class="inline-formula"><i>ε</i></span>(NO<span class="inline-formula"><sub><i>x</i></sub></span> or volatile organic compound, VOC), defined as the number of O<span class="inline-formula"><sub>3</sub></span> molecules produced per molecule of NO<span class="inline-formula"><sub><i>x</i></sub></span> (or VOC) oxidized. Average values of <span class="inline-formula"><i>ε</i></span>(NO<span class="inline-formula"><sub><i>x</i></sub></span>) and <span class="inline-formula"><i>ε</i></span>(VOC) determined by the OBM are 3.0 and 2.1 ppb ppb<span class="inline-formula"><sup>−1</sup></span>, respectively, and both compared well with values in previous studies. Approximately 67 % of the station days exhibit ozone formation sensitivity to NO<span class="inline-formula"><sub><i>x</i></sub></span>, and approximately 20 % of the station days are in the transitional regime sensitive to both NO<span class="inline-formula"><sub><i>x</i></sub></span> and VOC, and only approximately 13 % of the station days are sensitive to VOC. These results are in semi-quantitative agreement with the ozone formation sensitivity calculated by the box model constrained by ambient conditions observed during the two episodes. However, our OBM results differ from those of most previous investigations, which suggested that limiting the emission of VOC rather than NO<span class="inline-formula"><sub><i>x</i></sub></span> would be more effective in reducing ozone reduction in Guangdong.</p>https://acp.copernicus.org/articles/22/8403/2022/acp-22-8403-2022.pdf |
| spellingShingle | K. Song R. Liu R. Liu Y. Wang Y. Wang T. Liu L. Wei Y. Wu J. Zheng J. Zheng B. Wang B. Wang S. C. Liu S. C. Liu Observation-based analysis of ozone production sensitivity for two persistent ozone episodes in Guangdong, China Atmospheric Chemistry and Physics |
| title | Observation-based analysis of ozone production sensitivity for two persistent ozone episodes in Guangdong, China |
| title_full | Observation-based analysis of ozone production sensitivity for two persistent ozone episodes in Guangdong, China |
| title_fullStr | Observation-based analysis of ozone production sensitivity for two persistent ozone episodes in Guangdong, China |
| title_full_unstemmed | Observation-based analysis of ozone production sensitivity for two persistent ozone episodes in Guangdong, China |
| title_short | Observation-based analysis of ozone production sensitivity for two persistent ozone episodes in Guangdong, China |
| title_sort | observation based analysis of ozone production sensitivity for two persistent ozone episodes in guangdong china |
| url | https://acp.copernicus.org/articles/22/8403/2022/acp-22-8403-2022.pdf |
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