Hygroscopic properties and extinction of aerosol particles at ambient relative humidity in South-Eastern China

被引：84

作者：

Eichler, H. ^{[1
,3
]}

Cheng, Y. F. ^{[1
,2
]}

Birmili, W. ^{[1
]}

Nowak, A. ^{[1
]}

Wiedensohler, A. ^{[1
]}

Brueggemann, E. ^{[1
]}

Gnauk, T. ^{[1
]}

Herrmann, H. ^{[1
]}

Althausen, D. ^{[1
]}

Ansmann, A. ^{[1
]}

Engelmann, R. ^{[1
]}

Tesche, M. ^{[1
]}

Wendisch, M. ^{[3
]}

Zhang, Y. H. ^{[2
]}

Hu, M. ^{[2
]}

Liu, S. ^{[2
]}

Zeng, L. M. ^{[2
]}

机构：

[1] Leibniz Inst Tropospher Res IfT, D-04318 Leipzig, Germany

[2] Peking Univ, Coll Environm Sci, Beijing 100871, Peoples R China

[3] Johannes Gutenberg Univ Mainz, Inst Atmospher Phys, D-55009 Mainz, Germany

来源：

ATMOSPHERIC ENVIRONMENT | 2008年 / 42卷 / 25期

关键词：

hygroscopicity; descriptive hygroscopic growth factor; H-DMPS; PRD; particle extinction coefficient;

D O I：

10.1016/j.atmosenv.2008.05.007

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

During the "Program of Regional Integrated Experiments of Air Quality over Pearl River Delta 2004 (PRIDE-PRD2004)" hygroscopic properties of particles in the diameter range 22 nm to 10 mu m were determined. For that purpose, a Humidifying Differential Mobility Particle Sizer (H-DMPS) and a Micro-Orifice Uniform Deposition Impactor (MOUDI) were operated. The derived size-dependent particle hygroscopic growth factors were interpolated to ambient relative humidity (RH) and used to calculate the particle number size distributions (PNSDs) at ambient conditions. A comparison between the modeled particle extinction coefficients (sigma(ext,Mie)) and those observed with a Raman lidar was made. It is shown that the particle extinction coefficient (sigma(ext)) at ambient RH can be properly estimated with Mie-model calculations based on the in situ physico-chemical measurements of dry and humidified PNSD and chemical composition. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：6321 / 6334

页数：14

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