Typical atmospheric haze during crop harvest season in northeastern China:A case in the Changchun region

查看全文 作　　者：Wei Wei [1]Chen;Daniel [2,3]Q.Tong;Mo [4]Dan;Shi Chun [1]Zhang;Xue Lei [1]Zhang;Yue Peng [5]Pan

机构地区：[1]Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China;[2]. Cooperative Institute for Climate & Satellites, University of Maryland, College Park, MD 20740, USA;[3]Center for Spatial Information Science and Systems, George Mason University, Fairfax, VA 22030, USA;[4]Beijing Municipal Institute of Labor Protection, Beijing 100054, China;[5]State key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

出　　处：《Journal of Environmental Sciences》索引2017年第29卷第4期,共13页

基　　金：financially supported by the National Natural Science Foundation of China(Nos.41205106,41275158) 摘　　要：This study presents the mass concentrations of PM_(2.5),O_3,SO_2 and NOxat one urban,one suburban and two rural locations in the Changchun region from September 25 to October 272013. Major chemical components of PM_(2.5)at the four sites were daily sampled and analyzed. Most of daily concentrations of SO_2(7–82 μg/m^3),O_3(27–171 μg/m^3) and NOx(14–213 μg/m^3) were below the limits of the National Ambient Air Quality Standard(NAAQS)in China. However,PM_(2.5)concentrations(143–168 μg/m^3) were 2-fold higher than NAAQS.Higher PM_(2.5)concentrations(~ 150 μg/m^3) were measured during the pre-harvest and harvest at the urban site,while PM_(2.5)concentrations significantly increased from 250 to400 μg m^(-3) at suburban and rural sites with widespread biomass burning. At all sites,PM_(2.5)components were dominated by organic carbon(OC) and followed by soluble component sulfate(SO_4^(2-)),ammonium(NH_4^+) and nitrate(NO_3^-). Compared with rural sites,urban site had a higher mineral contribution and lower potassium(K^+and K) contribution to PM_(2.5).Severe atmospheric haze events that occurred from October 21 to 23 were attributed to strong source emissions(e.g.,biomass burning) and unfavorable air diffusion conditions.Furthermore,coal burning originating from winter heating supply beginning on October 18 increased the atmospheric pollutant emissions. For entire crop harvest period,the Positive Matrix Factorization(PMF) analysis indicated five important emission contributors in the Changchun region,as follows: secondary aerosol(39%),biomass burning(20%),supply heating(18%),soil/road dust(14%) and traffic(9%). 关键词：AEROSOL Air quality Agriculture Biomass burning PM2.5 PMF

相关文献

参考文献（39）
引证文献（10）
耦合文献（110）

参考文献(39)

引证文献(10)

耦合文献(110)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Typical atmospheric haze during crop harvest season in northeastern China:A case in the Changchun region

参考文献(39)

引证文献(10)

耦合文献(110)

用户提示