Articles | Volume 25, issue 9
https://doi.org/10.5194/acp-25-4755-2025
https://doi.org/10.5194/acp-25-4755-2025
Measurement report
 | 
07 May 2025
Measurement report |  | 07 May 2025

Measurement report: Size-resolved particle effective density measured by an AAC-SMPS and implications for chemical composition

Yao Song, Jing Wei, Wenlong Zhao, Jinmei Ding, Xiangyu Pei, Fei Zhang, Zhengning Xu, Ruifang Shi, Ya Wei, Lu Zhang, Lingling Jin, and Zhibin Wang

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Cited articles

Briggs, N. L. and Long, C. M.: Critical review of black carbon and elemental carbon source apportionment in Europe and the United States, Atmos. Environ., 144, 409–427, https://doi.org/10.1016/j.atmosenv.2016.09.002, 2016. 
Cheng, Y., Peng, Y., Cao, L.-M., Huang, X.-F., and He, L.-Y.: Identifying the geospatial relationship of surface ozone pollution in China: Implications for key pollution control regions, Sci. Total Environ., 930, 172763, https://doi.org/10.1016/j.scitotenv.2024.172763, 2024. 
Ching, J., Adachi, K., Zaizen, Y., Igarashi, Y., and Kajino, M.: Aerosol mixing state revealed by transmission electron microscopy pertaining to cloud formation and human airway deposition, npj Climate and Atmospheric Science, 2, 22, https://doi.org/10.1038/s41612-019-0081-9, 2019. 
Hu, M., Peng, J., Sun, K., Yue, D., Guo, S., Wiedensohler, A., and Wu, Z.: Estimation of Size-Resolved Ambient Particle Density Based on the Measurement of Aerosol Number, Mass, and Chemical Size Distributions in the Winter in Beijing, Environ. Sci. Technol., 46, 9941–9947, https://doi.org/10.1021/es204073t, 2012. 
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This study investigates the size-resolved effective density (ρeff) of aerosol particles in Hangzhou using a tandem aerodynamic aerosol classifier and scanning mobility particle sizer system. The ρeff values ranged from 1.47 to 1.63 g cm-3, increasing with particle diameter. The relationship between ρeff and the particle diameter varies due to differences in the chemical composition of the particles. A new method to derive the size-resolved chemical composition of particles from ρeff is proposed.
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