Measurement and Analysis of Optical Characteristics of Aerosol in Short Term in Hefei and Yuexi

Abstract

Abstract:

In order to analyze the effect of urban aerosol to marginal areas, and provide data for measurement of atmospheric parameters in Huadong area, experiments are performed in Hefei and Yuexi successively. The main equipments are aerodynamic paticle sizer spectrometer (APS 3321) and aethalometer (AE 31). The characteristic diameter of aerosol in Hefei testing point is 0.710 ?m, and 0.683 ?m in Yuexi, and the average size of aerosol follows logarithmic normal distribution. Statistic results of total number concentration of aerosol in Hefei and Yuexi show that the diurnal variation is obvious. The probability is larger than 80% when total number concentration in Hefei appears during 200~800 /cm3 , and 90% during 100~450 /cm3 in Yuexi. In both areas, Absorption coefficients of aerosol at 450 nm, 550 nm and 700 nm have obvious diurnal variation, and the differences are their magnitude. In Hefei, the magnitude of absorption coefficient is 10-5, but 10-6 in Yuexi.

Key words: atmospheric optics, aerosol, optical characteristic, size distribution, absorption coefficient

CLC Number:

P427

NI Zhi-Bo, HUANG Yin-Bo, GUO Feng-Xia, HUANG Hong-Hua, RAO Rui-Zhong. Measurement and Analysis of Optical Characteristics of Aerosol in Short Term in Hefei and Yuexi[J]. Journal of Atmospheric and Environmental Optics, 2010, 5(6): 414-420.

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