Impacts of Meteorological Conditions on Autumn Surface Ozone During 2014–2020 in the Pearl River Delta, China

Xu, Jiacheng; Zhao, Zhijun; Wu, Yongdong; Zhang, Ying; Wang, Yao; Su, Bin; Liang, Yanni; Hu, Tingting; Liu, Run

doi:10.1029/2022ea002742

Cited by 4 publications

(1 citation statement)

References 61 publications

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“…Besides emission, the meteorological condition, another key factor that can affect the transportation, production, and destruction of O3 and its precursors, also received much attention and has been extensively studied (Lu et al, 2019;Wang et al, 2017;. The long/short-term effects of changes in meteorological conditions on ozone concentrations have been investigated through a variety of methods, such as statistical analysis of observations and numerical modelling (Yang et al, 2019a;Xu et al, 2023a;Zheng et al, 2023). Liu and Wang (2020b) conducted sensitivity simulations by the CMAQ model to evaluate the contribution of weather condition variation to summer O3 levels from 2013-2017.…”

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confidence: 99%

Spatiotemporal Source Apportionment of Ozone Pollution over the Greater Bay Area

Chen,

Lu,

Fung

2024

Preprint

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Abstract. It has been found that ozone (O3) pollution episodic case is prone to appear when the Greater Bay Area (GBA) is under the control of typhoons and sub-tropical high-pressure systems in summer. To prevent these pollutions effectively and efficiently, it’s essential to understand the contribution of O3 precursors emitted from different periods and areas under these unfavorable weather conditions. In this study, we further extended the Ozone Source Apportionment Technology (OSAT) from the Comprehensive Air Quality Model with Extensions (CAMx) model to include the function to track the emission periods of O3 precursors. Then the updated OSAT module was applied to investigate the spatial-temporal contribution of precursors emissions to the O3 concentration over the GBA in July and August 2016, when several O3 episodic cases appeared in this period. Overall, the emissions within GBA, from other regions of Guangdong province (GDo), and the neighbouring provinces are the three major contributors, which account for 23 %, 15 %, and 17 % of monthly average O3 concentration, respectively. More than 70 % of O3 in the current day is mainly formed from the pollutants emitted within 3 days and the same day’s emission contributed approximately 30 %. During the O3 episodes, when typhoon approached, more pollutants emitted 2–3 days ago from the GDo and adjacent provinces were transported to the GBA, leading to the increase of O3 in this region. Under the persistent influence of northerly wind, the pollutants originating from eastern China earlier than 2 days ago can also show an obvious impact on the O3 over the GBA in the present day, accounting for approximately 12 %. On the other hand, the O3 pollution is primarily attributed to the local emission within 2 days when the GBA is mainly under the influence of the sub-tropical high-pressure systems. These results indicated the necessity to consider the influence of meteorological conditions in implementing the control measures. Meanwhile, analogous relationships between source area/time and receptor were derived by the zero-out method, supporting the validity of the updated OSAT module. Our approach and findings could offer more spatial-temporal information about the sources of O3 pollutions, which could aid in the development of effective and timely control policies.

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confidence: 99%

Spatiotemporal Source Apportionment of Ozone Pollution over the Greater Bay Area

Chen,

Lu,

Fung

2024

Preprint

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Contribution assessment of meteorology vs. emissions in the summer ozone trend from 2014 to 2023 in China by an environmental meteorology index

Lu,

Gong,

Chen

et al. 2025

Atmospheric Environment

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Different characteristics of independent and compound extreme heat and ozone pollution events in the Greater Bay Area of China

Huang,

Luo,

Gao

et al. 2023

International Journal of Applied Earth Observation and Geoinfor

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Impacts of Meteorological Conditions on Autumn Surface Ozone During 2014–2020 in the Pearl River Delta, China

Abstract: Exposure to high ozone (O 3 ) concentrations is detrimental to both human health and the social economy (

Cited by 4 publications

References 61 publications

Spatiotemporal Source Apportionment of Ozone Pollution over the Greater Bay Area

Spatiotemporal Source Apportionment of Ozone Pollution over the Greater Bay Area

Contribution assessment of meteorology vs. emissions in the summer ozone trend from 2014 to 2023 in China by an environmental meteorology index

Different characteristics of independent and compound extreme heat and ozone pollution events in the Greater Bay Area of China

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