Aerosol Particle Size Distribution Measurement in Beijing City During the Olympics

Abstract

Abstract:

Particulate matter has become the most important pollutant source with the rapid development of industrial economy. The aerosol particle number size distribution may be more important than the mass density in the view of its harm to human body health. So the research on the aerosol particle number size distribution appears to be more and more important today. By using the fine particle meter (FPM) developed by Anhui Institute of Optics and Fine Mechanics, an online, wide-range and quickly measurement of aerosol particle size number distribution in Beijing city during the Olympics has been performed without making any changes to the samples. The variation trend of daily average and real time of particle matter number concentration, the particle number size distribution during the Olympics were analyzed. The results show that the particle number concentration of nucleation mode (5 nm~20 nm) has chose relationships with the nucleation process, and the concentration curve is unimodal. Particle number concentration of atiken mode (20 nm~100 nm), with curve of three peak values, is stronger influenced by human activities and growing process of nucleation mode. Accumulation mode, with a tiny trend for its day average particle number concentration, is strong affected by the weather conditions, especially in strong wind and heavy rain. The concentration of accumulation mode can direct influence the atmospheric visibility.

Key words: Beijing Olympics, fine particle meter, particle number concentration, particle number size distribution, visibility

CLC Number:

X831

WANG Jie, LIU Jian-Guo, LIU Yi-Huai, WU De-Xia, HUANG Shu-Hua, GUI Hua-Qiao, DONG Yun-Sheng. Aerosol Particle Size Distribution Measurement in Beijing City During the Olympics[J]. Journal of Atmospheric and Environmental Optics, 2009, 4(4): 290-299.

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