Abstract: The single-band integral nephelometer observation data of Taklimakan Desert Taklimakan Desert atmosphere Observation Station (referred to as:Tazhong Test Station) in 2010,combined with meteorological Tazhong observations,were used to analyze aerosol scattering coefficient variations and change in aerosol scattering coefficient under different weather conditions in Tazhong. Study showed that: ① Hour average of scattering coefficient in Tazhong was 318.4 Mm^-1,and the values concentrated on 400 Mm^-1 or less. Diurnal variation ranged from 276.4 to 387.0 Mm^-1,and showed a single peak change. The values in daytime were bigger than that at night,and the maximum and minimum values appeared at 2:00 and 17:00,respectively. High values of the monthly average concentration appeared from March to August,especially March to April. The minimum values appeared in February. Seasonal variation of the scattering coefficient changed in the following way: spring> summer> autumn> winter.② When dust weather occurred,scattering coefficient increased significantly,and changed in different dust weather like this: the sandstorm> blowing sand> floating dust. The scattering coefficient when sandstorm was happening most concentrated from 2 000 to 2 500 Mm^-1. When blowing sand was happening,the scattering coefficient ranged from 300 to 400 Mm^-1. When floating dust was happening,the values were mainly under 300 Mm^-1. ③ The scattering coefficient values in cloudy day was significantly greater than that in sunny day,the two values were 356.5 Mm^-1 and 129.1 Mm^-1,respectively. Both changes in two kinds of days were relatively stable overall,and obvious fluctuations appeared from 8:00 to 11:00 and 20:00 to 22:00.

Key words: scattering coefficient, dust aerosols, Taklimakan desert