Aerosol optical properties and related chemical apportionment at Xinken   in Pearl River Delta of China

doi:10.1016/j.atmosenv.2008.02.034

CORC > 北京大学 > 环境科学与工程学院

	Aerosol optical properties and related chemical apportionment at Xinken in Pearl River Delta of China
	Cheng, Y. F. ; Wiedensohler, A. ; Eichler, H. ; Su, H. ; Gnauk, T. ; Brueggemann, E. ; Herrmann, H. ; Heintzenberg, J. ; Slanina, J. ; Tuch, T. ; Hu, M. ; Zhang, Y. H.
刊名	大气环境
	2008
关键词	aerosol optical properties chemical apportionment mass extinction/scattering efficiency specific attenuation cross-section PRD of China SINGLE SCATTERING ALBEDO EXPERIMENT ACE 1 LIGHT-SCATTERING RAYLEIGH-SCATTERING BLACK CARBON INTEGRATING NEPHELOMETER TERRESTRIAL ATMOSPHERE HYGROSCOPIC AEROSOLS RADIATIVE PROPERTIES ABSORBING PARTICLES
DOI	10.1016/j.atmosenv.2008.02.034
英文摘要	Aerosol optical properties (AOPs) of sub-10 mu m particles under dry conditions (relative humidity (RH) < 20%) were investigated at Xinken in Pearl River Delta of China from 4 October to 5 November 2004. Severe aerosol optical pollution has been found characterized by strongly light-absorbing particles. At 550 nm, the magnitude of the light scattering (333 +/- 138 Mm(-1)) and absorption (70 +/- 42 Mm(-1)), limited visual range (5.3 +/- 2.5 km), and low single scattering albedo (0.83 +/- 0.05) show Xinken to be comparable to the most polluted urban cores rather than even a polluted rural site. Other presented AOPs include hemispheric backscattering fraction (11 +/- 1%) and asymmetry parameter (0.67 +/- 0.01) at 550 nm, and Angstrom exponent (a(450/700) = 1.6 +/- 0.15). Systematic relationships exist among the various AOPs. Their diurnal variations cannot be solely explained with the development of atmospheric boundary layer, but also obviously influenced by local wind patterns, variation of sources, photochemistry and nighttime heterogeneous chemistry. The fractional contributions to extinction, scattering and absorption (f(ep;sp;ap)) due to sub-aerosol-populations and individual chemical compounds are derived by the Mie simulations. The sub-1 mu m particles contribute more than 90% of the particle extinction (sigma(ep,550) (nm)). Under dry conditions, f(ep) of non-sea-salt sulfate, particulate organic matter, elemental carbon (EC) and residual are about 44%, 17%, 17% and 15%, respectively. However, the water uptake of particles can contribute 50-60% to sigma(ep,550) (nm) at RH 90%. So in the ambient atmosphere, sulfate, carbonaceous material and water all play very important roles, concerning the visibility impairment at Xinken. The respective mass extinction, scattering and absorption efficiencies (alpha(ep;sp;ap)) are mostly consistent with previously reported values for the polluted area. alpha(ap,EC,550) (nm) for sub-1 mu m and sub-10 mu m ranges are 9.3 +/- 1.4 and 7.2 +/- 1.0 m(2) g(-1), respectively. Our results imply a higher alpha(ap,EC) for more internally mixed EC under the atmospheric conditions present at Xinken. (c) 2008 Elsevier Ltd. All rights reserved.; Environmental Sciences; Meteorology & Atmospheric Sciences; SCI(E); EI; 0; ARTICLE; 25; 6351-6372; 42
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158675]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Cheng, Y. F.,Wiedensohler, A.,Eichler, H.,et al. Aerosol optical properties and related chemical apportionment at Xinken in Pearl River Delta of China[J]. 大气环境,2008.
APA	Cheng, Y. F..,Wiedensohler, A..,Eichler, H..,Su, H..,Gnauk, T..,...&Zhang, Y. H..(2008).Aerosol optical properties and related chemical apportionment at Xinken in Pearl River Delta of China.大气环境.
MLA	Cheng, Y. F.,et al."Aerosol optical properties and related chemical apportionment at Xinken in Pearl River Delta of China".大气环境 (2008).