title: Impact of emission control on regional air quality: an observational study of air pollutants before, during and after the Beijing Olympic Games.
abstract: An observational study on trace gases and PM2.5 was conducted at three sites in and around Beijing, during the Olympic season from 2007 to 2009. Air quality improved significantly during the Olympic Games due to the special emission control measures. However, concentrations of the primary pollutants and PM were found to have risen significantly after the Games. Although the major O3 precursors (NO(x) and VOCs) were well controlled during the Olympic season, O3 was still found to be the highest in 2008, based on the data of ground-based observation. All this information suggests that while control of regional emissions for the Beijing Olympic Games did improved the air quality in Beijing, more efforts will be needed for the continuous improvement of regional air quality, especially for significant reductions of O3 and fine particulate pollution, and not only in Beijing, but also in the Beijing-Tianjin-Hebei region.
authors.forename: Shulan
authors.initials: S
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Gao
authors.forename: Yuechong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jingqiao
authors.initials: J
authors.lastname: Zhang
authors.forename: Fahe
authors.initials: F
authors.lastname: Cha
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.forename: Chun
authors.initials: C
authors.lastname: Ren
authors.forename: Wenxing
authors.initials: W
authors.lastname: Wang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000032:analysis / Q000517:prevention & control*; D002681:China; D002947:Cities; D010126:Ozone / Q000032:analysis; D052638:Particulate Matter / Q000032:analysis
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter; D010126:Ozone