Analysis of Influence Factors of PM2.5 in Chengdu Based on VAR Model

2017 International Conference on Environmental and Energy Engineering

生态环境科学;能源学

Mingzhi, Luo^1

School of Tourism, Sichuan University, No.24, Yihuan Road, Chengdu

610065, China^1

关键词: Analysis of influence factors;    Granger causality test;    Impulse response functions;    Meteorological factors;    Nitrogen dioxides;    PM2.5 concentration;    Temperature differences;    Variance decomposition;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/63/1/012039/pdf
DOI  :  10.1088/1755-1315/63/1/012039

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Air pollution and smog are the serious harms to public health and has attracted public attention. Based on the vector auto-regressive (VAR) model, we analysed the influence factors of PM2.5in Chengdu, investigated the effect of other kinds of air pollutants and meteorological factors onthe PM2.5by using the methods of generalized impulse response function, variance decomposition analysis, Granger causality test and therelated daily data from December 1, 2013 to November 14, 2016 in Chengdu city to the empirical study. The resultsshow that the influence factors of PM2.5were stable;the increase of nitrogen dioxide, ozone,precipitation and temperature difference led to the increase of PM2.5concentration while the increase ofthe wind speed, PM10, sulphur dioxide and carbon monoxide resulted in the decrease of PM2.5concentration.Climate conditions,nitrogen dioxide and ozone are Granger causes for PM2.5.It is suggestedthat the key for the control of PM2.5must be based on the cause and formation rules of PM2.5.A further study on nitrogen dioxide and ozone may play an important role in finding out the real source and formation reasons of PM2.5.