气候变化领域集成服务门户(CCPortal): Impacts of transboundary air pollution and local emissions on PM2.5 pollution in the Pearl River Delta region of China and the public health, and the policy implications

CCPortal

DOI	10.1088/1748-9326/aaf493
	Impacts of transboundary air pollution and local emissions on PM2.5 pollution in the Pearl River Delta region of China and the public health, and the policy implications
	Hou X.; Chan C.K.; Dong G.H.; Yim S.H.L.
发表日期	2019
ISSN	17489318
卷号	14 期号:3
英文摘要	Despite a downward trend in pollutant levels because of a series of emission control policies, the Pearl River Delta (PRD) region continues to suffer from a high number of fine particulate matter (PM2.5) events and the resultant public health impacts. To effectively control PM2.5 in the region, a comprehensive understanding of source contribution and PM2.5 responses to various emission species is critical. We applied the Community Multiscale Air Quality Modeling System together with the high-order decoupled direct method, to simulate air quality and PM2.5 sensitivity and examined PM2.5 responses to emission species in the PRD region in the four seasons of 2010. We employed a concentration-response function to quantify the resultant number of premature mortalities attributable to outdoor PM2.5. We estimated that local and transboundary air pollution (TAP) contributed 27% and 73%, respectively, of the region's PM2.5. In absolute terms, the largest impacts from local and TAP occurred in winter. With respect to relative contributions among the different sources, regional TAP (between cities in the region) (R-TAP) and local contributions had the largest effect in summer, whereas superregional TAP (from outside of the region) contributed the most in fall and winter. Outdoor PM2.5 pollution caused 20 160 (95% confidence interval: 5100-39 310) premature mortalities every year in the PRD region. Averaging among cities, 50%, 20%, and 30% of these deaths were attributable to S-TAP, R-TAP, and local contributions, respectively. Precursor gas emissions (i.e. NH3, volatile organic compounds, SO2, and NOx) affect PM2.5 level in a nonlinear manner; thus, individual pollutant control strategies are less effective for improving PM2.5 pollution than an integrated strategy. On the basis of our findings, we recommend that controls for multiple emission species should be implemented to control PM2.5 pollution in the region. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	air quality; high-order decoupled direct method; PM2.5 sensitivity; public health; transboundary air pollution
语种	英语
scopus关键词	Air quality; Ammonia; Emission control; Gas emissions; Public health; Public policy; Volatile organic compounds; Community multi-scale air quality models; Decoupled direct methods; Fine particulate matter (PM2.5); Pearl River Delta region; PM2.5 sensitivity; Relative contribution; Source contributions; Trans-boundary air pollutions; River pollution; air quality; atmospheric pollution; emission; emission control; environmental policy; health impact; methodology; mortality; particulate matter; pollution effect; pollution exposure; public health; transboundary pollution; China; Guangdong; Zhujiang Delta
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154681
作者单位	Institute of Environment, Energy and Sustainability, Chinese University of Hong Kong, Shatin, N.T, Hong Kong; School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; Department of Preventive Medicine, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China; Department of Geography and Resource Management, Chinese University of Hong Kong, Hong Kong, Hong Kong; Stanley Ho Big Data Decision Analytics Research Centre, Chinese University of Hong Kong, Shatin, N.T., Hong Kong
推荐引用方式 GB/T 7714	Hou X.,Chan C.K.,Dong G.H.,et al. Impacts of transboundary air pollution and local emissions on PM2.5 pollution in the Pearl River Delta region of China and the public health, and the policy implications[J],2019,14(3).
APA	Hou X.,Chan C.K.,Dong G.H.,&Yim S.H.L..(2019).Impacts of transboundary air pollution and local emissions on PM2.5 pollution in the Pearl River Delta region of China and the public health, and the policy implications.Environmental Research Letters,14(3).
MLA	Hou X.,et al."Impacts of transboundary air pollution and local emissions on PM2.5 pollution in the Pearl River Delta region of China and the public health, and the policy implications".Environmental Research Letters 14.3(2019).