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Proceedings Paper

Airborne measurements of the spatial and spectral distributions of aerosol particles over Hebei area, northern China
Author(s): Yan Yin; Ying Duan; Yu Zhang; Lixin Shi; Zhengqing Yang; Zhihui Wu; Yunchuan Li
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Paper Abstract

Airborne measurements of the concentration and size distribution of aerosol particles over Hebei area, northern China, are analyzed. The preliminary results show that, depending on the meteorological situations, the maximum mean number concentration of aerosol particles ranges from 5000 to 105 cm-3 near the ground and decreases exponentially to 1500- 3500 cm-3 above the boundary layer. It is also found that particle size distributions are the broadest close to the surface and become narrower with increasing height. The particle size distributions can be fitted with three or four lognormal distribution functions. Besides the emission rate and the distance from the source region, the results indicate that aerosol particle size is to a large extent dependent on the ambient atmospheric conditions such as humidity, and the presence of temperature inversion layers and cloud layers. Higher humidity and the presence of cloud layers may enhance particle growth and lead to larger particle size due to condensation and gas to particle conversion.m

Paper Details

Date Published: 11 July 2009
PDF: 8 pages
Proc. SPIE 7490, PIAGENG 2009: Intelligent Information, Control, and Communication Technology for Agricultural Engineering, 74900X (11 July 2009); doi: 10.1117/12.836797
Show Author Affiliations
Yan Yin, Nanjing Univ. of Information Science & Technology (China)
Ying Duan, Hebei Provincial Office of Weather Modification (China)
Yu Zhang, Nanjing Univ. of Information Science & Technology (China)
Lixin Shi, Hebei Provincial Office of Weather Modification (China)
Zhengqing Yang, Nanjing Univ. of Information Science & Technology (China)
Zhihui Wu, Hebei Provincial Office of Weather Modification (China)
Yunchuan Li, Hebei Provincial Office of Weather Modification (China)


Published in SPIE Proceedings Vol. 7490:
PIAGENG 2009: Intelligent Information, Control, and Communication Technology for Agricultural Engineering

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