A Two-Stage Method to Estimate the Contribution of Road Traffic to PM₂.₅ Concentrations in Beijing, China

International Journal of Environmental Research and Public Health
Xin FangYang Cao

Abstract

Fine particulate matters with aerodynamic diameters smaller than 2.5 micrometers (PM2.5) have been a critical environmental problem in China due to the rapid road vehicle growth in recent years. To date, most methods available to estimate traffic contributions to ambient PM2.5 concentration are often hampered by the need for collecting data on traffic volume, vehicle type and emission profile. To develop a simplified and indirect method to estimate the contribution of traffic to PM2.5 concentration in Beijing, China. Hourly PM2.5 concentration data, daily meteorological data and geographic information were collected at 35 air quality monitoring (AQM) stations in Beijing between 2013 and 2014. Based on the PM2.5 concentrations of different AQM station types, a two-stage method comprising a dispersion model and generalized additive mixed model (GAMM) was developed to estimate separately the traffic and non-traffic contributions to daily PM2.5 concentration. The geographical trend of PM2.5 concentrations was investigated using generalized linear mixed model. The temporal trend of PM2.5 and non-linear relationship between PM2.5 and meteorological conditions were assessed using GAMM. The medians of daily PM2.5 concentrations during ...Continue Reading

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Citations

Feb 10, 2018·International Journal of Environmental Research and Public Health·Barouch Giechaskiel
Dec 6, 2019·International Journal of Environmental Research and Public Health·Barouch GiechaskielPanagiota Dilara
Sep 27, 2016·International Journal of Environmental Research and Public Health·Cai-Rong LouYu-Ling Li
Dec 12, 2020·Frontiers in Public Health·Shaogu WangXinhua Qi
Oct 31, 2020·Diabetes, Metabolic Syndrome and Obesity : Targets and Therapy·Yue LiuXiuhua Guo
Dec 6, 2020·Particle and Fibre Toxicology·Shuang LiangZhiwei Sun
May 6, 2021·International Journal of Molecular Sciences·Yung-Li WangHui-Wen Chiu
Jul 7, 2021·Environmental Science and Pollution Research International·Xiaohong Liu

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Methods Mentioned

BETA
GAM

Software Mentioned

Stata
R
GAMM
1stOpt
Comprehensive Air Quality Model with Extensions ( CAMx )
mgcv

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