中文摘要：

采用积分式浑浊度仪于2008年5月-6月在乌鲁木齐市中区和市北区对气溶胶的散射和吸收系数进行连续观测,分析了市中区与市北区气溶胶散射和吸收系数的变化特征,结合同期的气象资料对变化原因进行了分析。结果表明：市中区和市北区气溶胶的散射吸收系数具有相同的变化趋势,日变化特征总体上呈现出＂W＂型;峰值分别出现在0时和8时前后,谷值则出现在4时和19时前后。散射系数远大于吸收系数,说明大气气溶胶的消光作用主要是散射作用完成。相对湿度与散射吸收系数不具有显著相关性,而风速对散射吸收系数影响较大。

英文摘要：

We have used integrating nephelometer to observe the scattering and absorption coefficients of the aerosol at the middle area （MA） and north area （NA） of Urumqi, in order to analyze the variation of scattering and absorption coefficients combined with meteorological data of the same period. The results showed the same trendency of scattering and absorption coefficent between MA and NA, the diurnal variation showed ＂W＂ shape. The peak value appeared at 0：00 and8：00 respectively, however, the valley value showed at 4：00 and 19;00, Scattering coefficient was much larger than the absorption coefficient. It indicated that the role of extinction of aerosols was mainly depended on scatting. Relative humidity did not have a significant correlation with the scattering absorption coefficient, While the wind speed had greater impact on the scattering absorption coefficient.