中文摘要：

通过南京北郊的微脉冲激光雷达(MPL)对气溶胶进行了连续观测,结合温度、湿度以及SO2浓度等资料分析了气溶胶的变化规律,结果表明,近地面(300m)气溶胶的退偏振比在00:00~10:00出现较大值,最大值可达0.163,峰值出现在05:00左右;该高度处的退偏振比与温度存在负相关性,与相对湿度、SO2浓度呈强的正相关性;在较低温度、较高的相对湿度以及较高SO2浓度条件下,SO2更容易被氧化生成非球形较明显的硫酸盐气溶胶颗粒,使得气溶胶退偏振比偏大.

英文摘要：

The data of consecutive observations of Micro Pulse Lidar(MPL),achieved at in the northern suburb of Nanjing,was analysed and variations of the aerosol with temperature,humidity and SO2concentration data were preliminary discussed.It was showed that at the near surface(300m)depolarization ratio of aerosol was larger at0~10o'clock with the peak value up to0.163at05:00AM;the depolarization ratio had a negative correlation with temperature,strong positive correlation with humidity and SO2concentration;under the conditions of low temperature,high relative humidity and high SO2level,SO2was more likely to be oxidized to produce non spherical,sulfate aerosol particles.