Ozone weekend effects in the Beijing–Tianjin–Hebei metropolitan area, China
The ozone weekend effect (OWE) was first investigated in the metropolitan area of Beijing–Tianjin–Hebei (BTH), China, using in situ measurements from the Atmospheric Environment Monitoring Network from July 2009 to August 2011. The results indicate that there is an obvious weekly periodical variatio...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2014-03-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/14/2419/2014/acp-14-2419-2014.pdf |
| _version_ | 1818535049775022080 |
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| author | Y. H. Wang B. Hu D. S. Ji Z. R. Liu G. Q. Tang J. Y. Xin H. X. Zhang T. Song L. L. Wang W. K. Gao X. K. Wang Y. S. Wang |
| author_facet | Y. H. Wang B. Hu D. S. Ji Z. R. Liu G. Q. Tang J. Y. Xin H. X. Zhang T. Song L. L. Wang W. K. Gao X. K. Wang Y. S. Wang |
| author_sort | Y. H. Wang |
| collection | DOAJ |
| description | The ozone weekend effect (OWE) was first investigated in the metropolitan
area of Beijing–Tianjin–Hebei (BTH), China, using in situ measurements from
the Atmospheric Environment Monitoring Network from July 2009 to August
2011. The results indicate that there is an obvious weekly periodical
variation in the surface ozone concentration. There is a lower ozone
concentration from Wednesday to Friday (weekday) and a higher concentration
from Saturday to Monday (weekend) at all the locations of the study.
NO<sub>x</sub> also displays a weekly cycle, with the maximum level occurring on
weekdays and the minimum level on weekends, especially later on Sunday night
and early Monday morning. This pattern may be responsible for the higher
concentration of ozone on weekends. Additionally, the vertical variations in
O<sub>3</sub> and NO<sub>x</sub> from the 8 m, 47 m, 120 m and 280 m observation
platforms on the 325 m Beijing meteorological tower displayed obvious weekly
cycles that corresponded to the surface results.
<br>
A smaller decrease in volatile organic compounds (VOCs; using CO as a proxy) and much lower NO<sub>x</sub>
concentrations on the weekend may lead to higher VOC / NO<sub>x</sub> ratio, which can
enhance the ozone production efficiency in VOC-limited regime areas.
Additionally, a clear weekly cycle in the fine aerosol concentration was
observed, with maximum values occurring on weekdays and minimum values
occurring on weekends. Higher concentrations of aerosol on weekdays can
reduce the UV radiation flux by scattering or absorbing, which leads to a
decrease in the ozone production efficiency. A significant weekly cycle in
UV radiation, consistent with the aerosol concentration, was discovered at
the Beijing meteorological tower site (BJT), validating the assumption. A comprehensive understanding of
the ozone weekend effect in the BTH area can provide deep insights into
controlling photochemical pollution. |
| first_indexed | 2024-12-11T18:19:39Z |
| format | Article |
| id | doaj.art-1bd12fddf67d43e5a29141f1878edbe7 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-11T18:19:39Z |
| publishDate | 2014-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-1bd12fddf67d43e5a29141f1878edbe72022-12-22T00:55:17ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242014-03-011452419242910.5194/acp-14-2419-2014Ozone weekend effects in the Beijing–Tianjin–Hebei metropolitan area, ChinaY. H. Wang0B. Hu1D. S. Ji2Z. R. Liu3G. Q. Tang4J. Y. Xin5H. X. Zhang6T. Song7L. L. Wang8W. K. Gao9X. K. Wang10Y. S. Wang11State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, ChinaResearch Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, ChinaResearch Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, ChinaThe ozone weekend effect (OWE) was first investigated in the metropolitan area of Beijing–Tianjin–Hebei (BTH), China, using in situ measurements from the Atmospheric Environment Monitoring Network from July 2009 to August 2011. The results indicate that there is an obvious weekly periodical variation in the surface ozone concentration. There is a lower ozone concentration from Wednesday to Friday (weekday) and a higher concentration from Saturday to Monday (weekend) at all the locations of the study. NO<sub>x</sub> also displays a weekly cycle, with the maximum level occurring on weekdays and the minimum level on weekends, especially later on Sunday night and early Monday morning. This pattern may be responsible for the higher concentration of ozone on weekends. Additionally, the vertical variations in O<sub>3</sub> and NO<sub>x</sub> from the 8 m, 47 m, 120 m and 280 m observation platforms on the 325 m Beijing meteorological tower displayed obvious weekly cycles that corresponded to the surface results. <br> A smaller decrease in volatile organic compounds (VOCs; using CO as a proxy) and much lower NO<sub>x</sub> concentrations on the weekend may lead to higher VOC / NO<sub>x</sub> ratio, which can enhance the ozone production efficiency in VOC-limited regime areas. Additionally, a clear weekly cycle in the fine aerosol concentration was observed, with maximum values occurring on weekdays and minimum values occurring on weekends. Higher concentrations of aerosol on weekdays can reduce the UV radiation flux by scattering or absorbing, which leads to a decrease in the ozone production efficiency. A significant weekly cycle in UV radiation, consistent with the aerosol concentration, was discovered at the Beijing meteorological tower site (BJT), validating the assumption. A comprehensive understanding of the ozone weekend effect in the BTH area can provide deep insights into controlling photochemical pollution.http://www.atmos-chem-phys.net/14/2419/2014/acp-14-2419-2014.pdf |
| spellingShingle | Y. H. Wang B. Hu D. S. Ji Z. R. Liu G. Q. Tang J. Y. Xin H. X. Zhang T. Song L. L. Wang W. K. Gao X. K. Wang Y. S. Wang Ozone weekend effects in the Beijing–Tianjin–Hebei metropolitan area, China Atmospheric Chemistry and Physics |
| title | Ozone weekend effects in the Beijing–Tianjin–Hebei metropolitan area, China |
| title_full | Ozone weekend effects in the Beijing–Tianjin–Hebei metropolitan area, China |
| title_fullStr | Ozone weekend effects in the Beijing–Tianjin–Hebei metropolitan area, China |
| title_full_unstemmed | Ozone weekend effects in the Beijing–Tianjin–Hebei metropolitan area, China |
| title_short | Ozone weekend effects in the Beijing–Tianjin–Hebei metropolitan area, China |
| title_sort | ozone weekend effects in the beijing tianjin hebei metropolitan area china |
| url | http://www.atmos-chem-phys.net/14/2419/2014/acp-14-2419-2014.pdf |
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