DOI: 10.1016/j.atmosenv.2015.05.029
Scopus记录号: 2-s2.0-84949531046
论文题名: Seasonal variation and difference of aerosol optical properties in columnar and surface atmospheres over Shanghai
作者: Cheng T ; , Xu C ; , Duan J ; , Wang Y ; , Leng C ; , Tao J ; , Che H ; , He Q ; , Wu Y ; , Zhang R ; , Li X ; , Chen J ; , Kong L ; , Yu X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 123 起始页码: 315
结束页码: 326
语种: 英语
英文关键词: Aerosol
; Columnar atmosphere
; Optical property
; Surface atmosphere
Scopus关键词: Aerosols
; Surface scattering
; Aerosol optical property
; Aerosol optical thickness
; Aerosol single scattering albedo
; Coarse mode particles
; Fine-mode particles
; Scattering co-efficient
; Scattering efficiency
; Wavelength exponent
; Optical properties
; aerosol composition
; aerosol property
; albedo
; optical depth
; particle size
; scattering
; seasonal variation
; size distribution
; spatial distribution
; wavelength
; aerosol
; Article
; atmosphere
; autumn
; China
; optical rotation
; priority journal
; seasonal variation
; spring
; summer
; surface property
; thickness
; time series analysis
; winter
; China
; Shanghai
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Aerosol optical properties in columnar and surface atmospheres were measured at an urban station of Shanghai from December 2010 to October 2012, and their seasonal variations and differences were examined. Aerosol optical thickness (AOT) at 500 nm is on average about 0.72 over the entire campaign, relatively higher in spring and summer and lower in autumn and winter. Ångström wavelength exponent (Alfa) mainly distributes in 1.1-1.6 (72%) with an obvious uni-peak pattern, implying that fine particles are primary in the aerosol group. Aerosol single scattering albedo of columnar atmosphere (SSA) at 440 nm experiences a weak seasonal variation with an average of 0.91, indicating that aerosols are mainly composed of particles with relatively higher scattering efficiency. The aerosol volume size distribution shows one fine mode and another coarse mode, with peak radii of 0.15 μm and 3.0 μm, respectively. The volume of fine mode particles is minimum in spring and maximum in summer, while the volume of coarse mode particles is minimum in autumn and maximum in winter. The scattering coefficient (Sc) of aerosols in surface atmosphere is relatively higher in winter and spring, the absorptive coefficient (Ab) is higher in autumn and summer. The SSA of surface atmosphere (SSA-surf) at 532 nm varies weakly over time with a lower deviation, mostly scattering in the range of 0.8-0.95 (82%). Although the disconnection of aerosol properties between columnar and surface atmospheres exists, AOT and Alfa are correlated to some extent with PM2.5 and visibility. However, the difference of SSA and SSA-surf is remarkable about 0.1. Overall, fine particles are dominant in aerosols and contribute to AOT significantly in this city, and their difference between surface and columnar atmospheres is unignored. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81437
Appears in Collections: 气候变化事实与影响
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作者单位: Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP), Department of Environmental Science and Engineering, Fudan University, Shanghai, China; South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou, China; Key Laboratory of Atmospheric Chemistry, Centre for Atmosphere Watch and Services, Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing, China; Shanghai Meteorological Bureau, Shanghai, China; Key Laboratory of Region Climate-Environment Research for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing, China
Recommended Citation:
Cheng T,, Xu C,, Duan J,et al. Seasonal variation and difference of aerosol optical properties in columnar and surface atmospheres over Shanghai[J]. Atmospheric Environment,2015-01-01,123