全球智库信息集成服务系统(G2TT): Connection of organics to atmospheric new particle formation and growth at an urban site of Beijing.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1016/j.atmosenv.2014.11.069
	Connection of organics to atmospheric new particle formation and growth at an urban site of Beijing.
	Wang ZB; Hu M; Pei XY; Zhang RY; Paasonen P; Zheng J; Yue DL; Wu ZJ
发表日期	2015
出处	Atmospheric Environment 103: 7-17
出版年	2015
语种	英语
摘要	In the present work, we aim to elucidate the roles of low-volatility organic vapours in atmospheric new particle formation in urban Beijing. Proposed organic molecules are derived from both the ambient measurement and the reasonable proxy. Several representations for the nucleation theories involving sulfuric acid and organic vapours are evaluated. The particle nucleation rates show good correlations both with sulfuric acid and organic vapours, suggesting that both play an important role in the atmospheric new particle formation. For the entile data set, the best fit (R=0.79, slope=1.1) between the observed and modelled particle nucleation rates is achieved with the homogenous nucleation theory of sulfuric acid (both homomolecularly and hetermolecularly) with separate coefficients in J=KSA1[H2SO4]2+KSA2[H2SO4][Org]. In addition, sulfuric acid concentration only contributes a small fraction (<15%) to the total observed growth rate. The growth rates of 7-30 nm particles show positive correlation with the organic vapours oxidized by ozone, suggesting that particle nucleation may be controlled by the light intensity or OH concentration, while the growth of nucleation mode particles seems to be limited more by the concentrations of the organic precursors.
主题	Mitigation of Air Pollution (MAG) ; Air Quality & ; Greenhouse Gases (AIR)
关键词	New particle formation Sulfuric acid Organic vapour Particle growth
URL	http://pure.iiasa.ac.at/id/eprint/11534/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/130418
推荐引用方式 GB/T 7714	Wang ZB,Hu M,Pei XY,et al. Connection of organics to atmospheric new particle formation and growth at an urban site of Beijing.. 2015.