Analysis of particulate mass concentration, aerosol number concentration and visibility in beijing--颗粒学报PARTICUOLOGY

Yan, F., Hu, H., & Yu, T. (2004). Analysis of particulate mass concentration, aerosol number concentration and visibility in beijing. China Particuology, 2(1), 25-30. https://doi.org/10.1016/S1672-2515(07)60016-5

Analysis of particulate mass concentration, aerosol number concentration and visibility in beijing

Fengqi Yan ^a, Huanling Hu^a *, Tong Yu ^b

a Atmospheric Optics Laboratory, Anhui Institute Optics and Fine Mechanics, Chinese Academy of Sciences, Anhui 230031, P. R. China
b The Center of Beijing Environmental Quality Protection, Beijing 100044, P. R. China

10.1016/S1672-2515(07)60016-5

Volume 2, Issue 1, February 2004, Pages 25-30

Received 22 April 2003, Accepted 21 August 2003, Available online 27 November 2007.

E-mail: hlhu@aiofm.ac.cn

Highlights

Abstract

Particulate mass concentration (PM₁₀, PM_2.5), aerosol number concentration (NOPC), aerosol size distribution and atmospheric visibility were simultaneously measured in Beijing in the summer and winter of 2001. From the profuse data collected, the following conclusions can be drown: (1) there are two peaks for the average diurnal variations of PM₁₀ and N_OPC in the summer, an obvious valley can be seen between 12:30 and 15:00 for their average diurnal variation in the winter; (2) there is one single peak for the average diurnal variation of atmospheric visibility in the summer, while there are two peaks in the winter; (3) PM₁₀ and N_OPC are usually smaller in the summer than those in the winter; (4) the average visibility is much lower during 00:00∼09:00 in the summer than that in the winter, because of the very high relative humidity and higher concentration of the large particles (r>1.25 μm) in the summer during the period; (5) aerosol size distributions usually depend closely on season and relative humidity at the same place.

Graphical abstract

Keywords

optical particle counter; atmospheric aerosol; atmospheric visibility; number concentration; distribution

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