title: Characterization of black carbon in an urban-rural fringe area of Beijing.
abstract: Measuring black carbon (BC) is critical to understand the impact of combustion aerosols on air quality and climate change. In this study, BC was measured in 2014 at a unique community formed with rapid economic development and urbanization in an urban-rural fringe area of Beijing. Hourly BC concentrations were 0.1-33.5 μg/m3with the annual average of 4.4 ± 3.7 μg/m3. BC concentrations had clear diurnal, weekly, and seasonal variations, and were closely related with atmospheric visibility. The absorption coefficient of aerosols increased while its contribution to extinction coefficient decreased with the enhancement of PM2.5concentration. The high mass absorption efficiency (MAE) of EC was attributed to a combination of coal combustion, vehicular emission and rapidly coating by water-soluble ions and organic carbon (OC). BC concentrations followed a typical lognormal pattern, with over 88% samples in 0.1-10.0 μg/m3. Low BC levels were mostly bounded up with winds from north and northwest. Coal combustion and biomass burning were closely associated with severe haze pollution events. Firework discharge had significant UV absorption contribution. During the Asia-Pacific Economic Cooperation (APEC) forum in November 2014, air quality obviously improved due to various control strategies.
authors.affiliation: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China. Electronic address: jds@mail.iap.ac.cn.
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Ji
authors.affiliation: China National Environmental Monitoring Center, Beijing, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Li
authors.affiliation: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Collaboration Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Pang
authors.affiliation: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Collaboration Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Xue
authors.affiliation: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.
authors.forename: Lili
authors.initials: L
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.
authors.forename: Yunfei
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Department of Civil & Environmental Engineering, Louisiana State University, Baton Rouge, LA, USA. Electronic address: hlzhang@lsu.edu.
authors.forename: Hongliang
authors.initials: H
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.
authors.forename: Yuesi
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000336:Aerosols; D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D000068476:Beijing; D018533:Biomass; D002244:Carbon / Q000032:analysis* / Q000737:chemistry; D057231:Climate Change; D003031:Coal; D004784:Environmental Monitoring; D012621:Seasons; D053260:Soot / Q000032:analysis* / Q000737:chemistry; D014507:Urbanization; D001335:Vehicle Emissions
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D003031:Coal; D053260:Soot; D001335:Vehicle Emissions; D002244:Carbon
keywords: Absorption coefficient; Beijing; Black carbon; Urban-rural fringe area; Visibility