兰州市西固区冬季大气气溶胶粒子的散射特征

A Study on Scattering Properties of Aerosol Particle over Xigu District of Lanzhou

利用2002年1月31日～2月2日的积分浑浊度仪观测资料和PM10观测资料对冬季兰州市西固区大气气溶胶粒子散射特征及其与空气污染的关系进行了研究。结果表明,波长λ=550nm(绿光)处散射系数日变化规律呈双峰型,峰值分别出现在11:00～12:00和22:00左右(北京时,下同),散射系数的变化范围是1.34×10-4～3.3×10-3m-1,其变化规律同PM10浓度的变化规律是一致的,两者有较好的相关性,相关系数r≥0.8。

The atmospheric aerosol scatteringcoefficientand its relation to air pollution were analyzed by using the Integrating Nephelometer and PM10 data in Xigu district of Lanzhou cityfrom January 31 to February 3, 2002. The results show that the daily variation of partical scatteringcoefficient(λ=550nm) presents a curve of bi\|peaks, the maximum value appears at 11:00～12:00 and 22:00, respectively. The range of scatteringcoefficient variesfrom 1.34×10-4 to 3.3×10-3m-1.The concentration of PM10and scattering coefficient have a high correlationcoefficient(r≥0.8). The variation of particle scattering coefficient is the same as that of the concentration of PM10