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J Environ Manage


Title:"Identification of close relationship between large-scale circulation patterns and ozone-precursor sensitivity in the Pearl River Delta, China"
Author(s):Du Y; Zhao K; Yuan Z; Luo H; Ma W; Liu X; Wang L; Liao C; Zhang Y;
Address:"School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China. School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China. Electronic address: khzhao@scut.edu.cn. School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China. Electronic address: zibing@scut.edu.cn. Guangdong Provincial Academy of Environmental Science, Guangzhou, 510045, China"
Journal Title:J Environ Manage
Year:2022
Volume:20220318
Issue:
Page Number:114915 -
DOI: 10.1016/j.jenvman.2022.114915
ISSN/ISBN:1095-8630 (Electronic) 0301-4797 (Linking)
Abstract:"To curb the continuous deterioration of ozone (O(3)) pollution in China, identifying the O(3)-precursor sensitivity (OPS) and its driving factors is a prerequisite for formulating effective O(3) pollution control measures. Traditional OPS identification methods have limitations in terms of spatiotemporal representation and timeliness; therefore, they are not appropriate for making OPS forecasts for O(3) contingency control. OPS is not only influenced by local precursor emissions but is also closely related to meteorological conditions governed by large-scale circulation (LSC). In this study, a localized three-dimensional numerical modeling system was used to investigate the relationship between LSC and OPS in the Pearl River Delta (PRD) of China during September 2017, a month with continuous O(3) pollution. Our results highlighted that there was a close relationship between LSC and OPS over the PRD, and the four dominant LSC patterns corresponded well to the NO(x)-limited, NO(x)-limited, VOC-limited, and transitional regimes, respectively. The clear linkage between LSC and OPS was mainly driven by the spatial heterogeneity of NO(x) and VOC emissions within and beyond the PRD along the prevailing winds under different LSC patterns. A conceptual model was developed to highlight the intrinsic causality between the LSC and OPS. Because current technology can accurately forecast LSC 48-72 h in advance, the LSC-based OPS forecast method provided us with a novel approach to guide contingency control and management measures to reduce peak O(3) at a regional scale"
Keywords:*Air Pollutants/analysis *Air Pollution China Environmental Monitoring/methods *Ozone/analysis Rivers *Volatile Organic Compounds/analysis Emissions control Large-scale circulations O(3)-precursor sensitivity Pearl River Delta Regional transport;
Notes:"MedlineDu, Yi Zhao, Kaihui Yuan, Zibing Luo, Huihong Ma, Wei Liu, Xuehui Wang, Long Liao, Chenghao Zhang, Yongbo eng England 2022/03/22 J Environ Manage. 2022 Jun 15; 312:114915. doi: 10.1016/j.jenvman.2022.114915. Epub 2022 Mar 18"

 
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