南京北郊硫酸盐气溶胶性质实验观测
China Environmental Science(2017)
Abstract
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.
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Key words
lidar,temperature,depolarization ratio,humidity,sulfate aerosol,SO2 concentration
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