我校银娱优越会717网站王德运老师在T3级别期刊——《Journal of the Air & Waste Management Association (1995)》上发表题为“The effectiveness of traffic and production restrictions on urban air quality: a rare opportunity for investigation.”。论文作者王德运为银娱优越会717网站副教授。
Traffic and production restrictions are two important emergency measures for controlling urban air pollution. The lockdown policies implemented during the COVID-19 pandemic period are nearly equivalent to the policies of traffic and production restriction, which provides a rare opportunity to quantitatively evaluate the effectiveness of these emergency measures. Taking Wuhan, China as the study area, this paper firstly verified the changes in six air pollutants and analyzed their change rules in different lockdown periods using statistical methods. Then the structural breakpoints in air pollutants were detected via regression discontinuity design model. To comprehensively understand the effects of restrictions on air pollution, the influences of meteorological conditions on air pollution were also investigated. The results illustrated that the concentrations of PM2.5, PM10and NO2decreased significantly during lockdown period. By comparing with the RDD coefficients of PM2.5(-34.46), PM10(-37.11) and NO2(-19.15), the lockdown had little effect on CO (-0.32). The traffic and production restrictions had no apparent effects on SO2. Although O3showed an increasing trend, the increase was not limited to the lockdown period, meaning that the traffic and production restrictions had less effect on the increasing trend of O3concentration. Moreover, the structural breakpoints were verified in four air pollutants (PM2.5, PM10, NO2, and CO), and the structural breakpoints were caused by lockdown instead of the Spring Festival. The results also indicated that the meteorological conditions were not the main reasons for the changes in air pollutants during the lockdown period. This paper reveals how the traffic and production restrictions affect urban air pollution and provides a strong implementation basis for the air pollution control policy.
The effectiveness of traffic and production restrictions on urban air quality: a rare opportunity for investigation.