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Original Research Papers

Aircraft study of aerosol vertical distributions over Beijing and their optical properties

Authors:

Pengfei Liu ,

Department of Atmospheric Science, School of Physics, Peking University, CN
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Chunsheng Zhao,

Department of Atmospheric Science, School of Physics, Peking University, CN
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Qiang Zhang,

Beijing Weather Modification Office, Beijing Meteorological Bureau, CN
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Zhaoze Deng,

Department of Atmospheric Science, School of Physics, Peking University, CN
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Mengyu Huang,

Department of Atmospheric Science, School of Physics, Peking University; Beijing Weather Modification Office, Beijing Meteorological Bureau, CN
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Xincheng Ma,

Beijing Weather Modification Office, Beijing Meteorological Bureau, CN
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Xuexi Tie

National Center for Atmospheric Research, US
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Abstract

A set of 152 vertical profiles of aerosol number concentration and size distribution with diameter ranging from 0.12 to 3.0 μm observed by the airborne optical spectrometer probe in Beijing, China, between February 2005 and September 2006 is analysed and discussed. The statistic of aerosol number concentration (Na) reveals a high aerosol number density in this region with average surface level number concentration (N0) of about 6600 cm-3 (0.12–3.0 μm). The average vertical profile of Na approximately satisfies an exponential decline function with a scale height of 1419 m. The Na profiles are influenced by the structures of planetary boundary layer (PBL) significantly and two typical types of Na profile under different conditions of PBL are presented and parametrized in this study. The observations of aerosol size distribution show that, in most cases the aerosol size distributions are not very sensitive to altitude, with effective radii ranging from 0.16 to 0.28 μm. Comparison between aircraft-derived aerosol optical depth (AOD) and Moderate Resolution Imaging Spectroradiometer-derived AOD shows good agreement. The Mie model calculations suggest that the surface level number concentration, the PBL height and the structure of PBL can influence the AOD significantly.

How to Cite: Liu, P., Zhao, C., Zhang, Q., Deng, Z., Huang, M., Ma, X. and Tie, X., 2009. Aircraft study of aerosol vertical distributions over Beijing and their optical properties. Tellus B: Chemical and Physical Meteorology, 61(5), pp.756–767. DOI: http://doi.org/10.1111/j.1600-0889.2009.00440.x
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  Published on 01 Jan 2009
 Accepted on 29 Jul 2009            Submitted on 7 Dec 2008

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