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 μ 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 (σext, Mie) and those observed with a Raman lidar was made. It is shown that the particle extinction coefficient (σext) 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. © 2008 Elsevier Ltd. All rights reserved.
CITATION STYLE
Eichler, H., Cheng, Y. F., Birmili, W., Nowak, A., Wiedensohler, A., Brüggemann, E., … Zeng, L. M. (2008). Hygroscopic properties and extinction of aerosol particles at ambient relative humidity in South-Eastern China. Atmospheric Environment, 42(25), 6321–6334. https://doi.org/10.1016/j.atmosenv.2008.05.007
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