Investigation of the multi-year trend of surface ozone and ozone-precursor relationship in Hong Kong

Investigation of the multi-year trend of surface ozone and ozone-precursor relationship in Hong Kong

As a highly urbanized city in East Asia, Hong Kong has faced severe photochemical ozone (O3) pollution for years. A comprehensive understanding of pollution characteristics is crucial for effective mitigation of the O3 problem. This study systematically investigated the multi-year trends of surface...

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Veröffentlicht in:Atmospheric environment (1994) 2023-12, Vol.315, p.120139, Article 120139
Hauptverfasser: Feng, Xin, Guo, Jia, Wang, Zhe, Gu, Dasa, Ho, Kin-Fai, Chen, Yi, Liao, Kezheng, Cheung, Vincent, Louie, Peter K.K., Leung, Kenneth, Yu, Jian Zhen, Fung, Jimmy, Lau, Alexis
Format: Artikel
Sprache:eng
Schlagworte:
Nighttime ozone peak
O3-precursor relationship
Photochemical ozone
Regional transport
Trend analysis
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Zusammenfassung:As a highly urbanized city in East Asia, Hong Kong has faced severe photochemical ozone (O3) pollution for years. A comprehensive understanding of pollution characteristics is crucial for effective mitigation of the O3 problem. This study systematically investigated the multi-year trends of surface O3 over the last decade using measurements from 11 selected Air Quality Monitoring Stations (AQMS). The analysis reveals upward trends in the annual average and daily maximum 8-h average (DMA8) O3 from 2011 to 2022, with rates of 0.34 ppb year−1 (p 
ISSN:1352-2310
DOI:10.1016/j.atmosenv.2023.120139