气候变化领域集成服务门户(CCPortal): Using wavelet transform to analyse on-road mobile measurements of air pollutants: A case study to evaluate vehicle emission control policies during the 2014 APEC summit

CCPortal

DOI	10.5194/acp-19-13841-2019
	Using wavelet transform to analyse on-road mobile measurements of air pollutants: A case study to evaluate vehicle emission control policies during the 2014 APEC summit
	Li Y.; Tan Z.; Ye C.; Wang J.; Wang Y.; Zhu Y.; Liang P.; Chen X.; Fang Y.; Han Y.; Wang Q.; He D.; Wang Y.; Zhu T.
发表日期	2019
ISSN	16807316
起始页码	13841
结束页码	13857
卷号	19 期号:22
英文摘要	Vehicle emissions are a major source of air pollution in urban areas and thus greatly impact air quality in the megacity Beijing. Various vehicle emission control policies have been implemented at great cost, but there is a lack of appropriate methods to evaluate the effectiveness of such policies. Here we developed a wavelet transform method (WTM) to evaluate the effectiveness of vehicle emission control policies during the 2014 Asia-Pacific Economic Cooperation (APEC) summit, taking advantage of high-timeresolution mobile measurements of NO, NOx, BC, CO, SO2, and O3 made around the 4th Ring Road of Beijing. The WTM decomposed on-road mobile measurements into highand low-frequency components, where the former represents immediate vehicle emissions, and the latter represents the atmospheric background in addition to accumulated onroad emissions. The high-frequency component of the WTM (CH_freq:), which represents the concentrations of pollutants from vehicle emissions (Cveh:), was used to evaluate the changes in vehicle emission intensity in the full-APEC period (3-12 November 2014) relative to the pre-APEC (28 October to 2 November 2014) and post-APEC (13-22 November 2014) periods, during which different vehicle emission control policies were implemented. Our results suggest that the Cveh: of NO, NOx, BC, and CO in the full-APEC period were 19.4 %, 17.7 %, 0.0 %, and 50.0 % lower, respectively, than those in the pre-APEC period during daytime and were 50.0 %, 47.3 %, 62.5 %, and 50.0 % lower than those in the post-APEC period during daytime. The Cveh: of NO, NOx, BC, and CO in the full-APEC period were 65.3 %, 65.4 %, 14.3 %, and 50.0 % lower than those in the post-APEC period during night-time. These results indicate that the vehicle emission control policies implemented during the full-APEC period were effective. Using on-road mobile measurements in combination with the WTM, we developed a new method for the evaluation of pollution control policies. © 2019 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	air quality; Asian Pacific Economic Cooperation Forum; atmospheric pollution; emission control; emission inventory; measurement method; policy analysis; pollution policy; traffic emission; wavelet analysis; Beijing [Beijing (ADS)]; 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/144044
作者单位	BIC-ESAT and SKL-ESPC, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; Institute of Urban Meteorology, China Meteorological Administration, Beijing, 100089, China; Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei, China Meteorological Administration, Beijing, 100089, China
推荐引用方式 GB/T 7714	Li Y.,Tan Z.,Ye C.,et al. Using wavelet transform to analyse on-road mobile measurements of air pollutants: A case study to evaluate vehicle emission control policies during the 2014 APEC summit[J],2019,19(22).
APA	Li Y..,Tan Z..,Ye C..,Wang J..,Wang Y..,...&Zhu T..(2019).Using wavelet transform to analyse on-road mobile measurements of air pollutants: A case study to evaluate vehicle emission control policies during the 2014 APEC summit.Atmospheric Chemistry and Physics,19(22).
MLA	Li Y.,et al."Using wavelet transform to analyse on-road mobile measurements of air pollutants: A case study to evaluate vehicle emission control policies during the 2014 APEC summit".Atmospheric Chemistry and Physics 19.22(2019).