气候变化领域集成服务门户(CCPortal): Temporally resolved sectoral and regional contributions to air pollution in Beijing: Informing short-term emission controls

CCPortal

DOI	10.5194/acp-21-4471-2021
	Temporally resolved sectoral and regional contributions to air pollution in Beijing: Informing short-term emission controls
	Umar Ansari T.; Wild O.; Ryan E.; Chen Y.; Li J.; Wang Z.
发表日期	2021
ISSN	1680-7316
起始页码	4471
结束页码	4485
卷号	21 期号:6
英文摘要	We investigate the contributions of local and regional emission sources to air pollution in Beijing to inform the design of short-term emission control strategies for mitigating major pollution episodes. We use a well-evaluated version of the WRF-Chem model at 3 km horizontal resolution to determine the daily accumulation of pollution over Beijing from local and regional sources in October 2014 under a range of meteorological conditions. Considering feasible emission reductions across residential, transport, power, and industrial sectors, we find that 1 d controls on local emissions have an immediate effect on PM2.5; (particulate matter with diameter less than 2.5 μ;m) concentrations on the same day but can have lingering effects as much as 5 d later under stagnant conditions. One-day controls in surrounding provinces have the greatest effect in Beijing on the day following the controls but may have negligible effects under northwesterly winds when local emissions dominate. To explore the contribution of different emission sectors and regions, we perform simulations with each source removed in turn. We find that residential and industrial sectors from neighbouring provinces dominate PM2.5; levels in Beijing during major pollution episodes but that local residential emissions and industrial or residential emissions from more distant provinces can also contribute significantly during some episodes. We then perform a structured set of perturbed emission simulations to allow us to build statistical emulators that represent the relationships between emission sources and air pollution in Beijing over the period. We use these computationally fast emulators to determine the sensitivity of PM2.5; concentrations to different emission sources and the interactions between them, including for secondary PM, and to create pollutant response surfaces for daily average PM2.5; concentrations in Beijing. We use these surfaces to identify the short-term emission controls needed to meet the national air quality target of daily average PM2.5; less than 75 μ;g m-3; for pollution episodes of different intensities. We find that for heavily polluted days with daily mean PM2.5; higher than 225 μ;g m-3;, even emission reductions of 90 % across all sectors over Beijing and surrounding provinces may be insufficient to meet the national air quality standards. These results highlight the regional nature of PM pollution and the challenges of tackling it during major pollution episodes.. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	air quality; atmospheric pollution; concentration (composition); emission control; particulate matter; pollutant source; Beijing [China]; China
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247038
作者单位	Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom; School of Mathematics, University of Manchester, Manchester, United Kingdom; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Campus Fryslân, University of Groningen, Leeuwarden, Netherlands; College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom
推荐引用方式 GB/T 7714	Umar Ansari T.,Wild O.,Ryan E.,et al. Temporally resolved sectoral and regional contributions to air pollution in Beijing: Informing short-term emission controls[J],2021,21(6).
APA	Umar Ansari T.,Wild O.,Ryan E.,Chen Y.,Li J.,&Wang Z..(2021).Temporally resolved sectoral and regional contributions to air pollution in Beijing: Informing short-term emission controls.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(6).
MLA	Umar Ansari T.,et al."Temporally resolved sectoral and regional contributions to air pollution in Beijing: Informing short-term emission controls".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.6(2021).