DOI: 10.1016/j.atmosenv.2013.10.052
Scopus记录号: 2-s2.0-84888086847
论文题名: Optical properties and radiative forcing of urban aerosols in Nanjing, China
作者: Zhuang B ; L ; , Wang T ; J ; , Li S ; , Liu J ; , Talbot R ; , Mao H ; T ; , Yang X ; Q ; , Fu C ; B ; , Yin C ; Q ; , Zhu J ; L ; , Che H ; Z ; , Zhang X ; Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 83 起始页码: 43
结束页码: 52
语种: 英语
英文关键词: Aerosols
; Angstrom exponent
; Nanjing
; Optical depth
; Radiative forcing
; Single scattering albedo
Scopus关键词: Aerosols
; Atmospheric aerosols
; Atmospheric radiation
; Optical properties
; Radiometers
; Satellite imagery
; Scattering
; Storms
; Sun
; Angstrom exponent
; Nanjing
; Optical depth
; Radiative forcings
; Single scattering albedo
; Solar radiation
; black carbon
; nitrate
; sulfate
; aerosol
; albedo
; atmospheric pollution
; MODIS
; optical property
; particulate matter
; pollution effect
; radiative forcing
; seasonality
; urban area
; aerosol
; article
; autumn
; China
; humidity
; optics
; pollution
; priority journal
; radiative forcing
; seasonal variation
; solar radiation
; spring
; summer
; winter
; China
; Fujian
; Nanjing [Fujian]
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: Continuous measurements of atmospheric aerosols were made in Nanjing, a megacity in China, from 18 January to 18 April, 2011 (Phase 1) and from 22 April 2011 to 21 April 2012 (Phase 2). Aerosol characteristics, optical properties, and direct radiative forcing (DRF) were studied through interpretations of these measurements. We found that during Phase 1, mean PM2.5, black carbon (BC), and aerosol scattering coefficient (Bsp) in Nanjing were 76.1±59.3μgm-3, 4.1±2.2μgm-3, and 170.9±105.8Mm-1, respectively. High pollution episodes occurred during Spring and Lantern Festivals when hourly PM2.5 concentrations reached 440μgm-3, possibly due to significant discharge of fireworks. Temporal variations of PM2.5, BC, and Bsp were similar to each other. It is estimated that inorganic scattering aerosols account for about 49±8.6% of total aerosols while BC only accounted for 6.6±2.9%, and nitrate was larger than sulfate. In Phase 2, optical properties of aerosols show great seasonality. High relative humidity (RH) in summer (June, July, August) likely attributed to large optical depth (AOD) and small Angstrom exponent (AE) of aerosols. Due to dust storms, AE of total aerosols was the smallest in spring (March, April, May). Annual mean 550-nm AOD and 675/440-nm AE were 0.6±0.3 and 1.25±0.29 for total aerosols, 0.04±0.02 and 1.44±0.50 for absorbing aerosols, 0.48±0.29 and 1.64±0.29 for fine aerosols, respectively. Annual single scattering albedo of aerosols ranged from 0.90 to 0.92. Real time wavelength-dependent surface albedo from the Moderate Resolution Imaging Spectroradiometer (MODIS) was used to assess aerosol DRFs. Both total and absorbing aerosol DRFs had significant seasonal variations in Nanjing and they were the strongest in summer. Annual mean clear sky TOA DRF (including daytime and nighttime) of total and absorbing aerosols was about-6.9 and+4.5Wm-2, respectively. Aerosol DRFs were found to be sensitive to surface albedo. Over brighter surfaces, solar radiation was more absorbed by absorbing aerosols and less scattered by scattering aerosols. © 2013 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81206
Appears in Collections: 气候变化事实与影响
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作者单位: School of Atmospheric Sciences, Nanjing University, Hankou Rd. 22, Nanjing 210093, China; University of Toronto, Toronto M5S 3G3, Canada; Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77204, United States; Department of Chemistry, State University of New York, College of Environmental Science and Forestry, Syracuse, NY 13219, United States; Chinese Academy of Meteorological Sciences, Beijing 100081, China
Recommended Citation:
Zhuang B,L,, Wang T,et al. Optical properties and radiative forcing of urban aerosols in Nanjing, China[J]. Atmospheric Environment,2014-01-01,83