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大气科学  2003 

北京地区对流层中上部云和气溶胶的激光雷达探测

DOI: 10.3878/j.issn.1006-9895.2003.01.01

Keywords: 高云,气溶胶,激光雷达遥感

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Abstract:

介绍了近年来研制的一台多波长激光雷达及其探测对流层高云和气溶胶的实验,并依据探测结果重点分析了北京2000年1月至4月对流层上部云和气溶胶在532nm波长的消光系数分布特征.结果表明:从6km至11km的气溶胶光学厚度值在0.0152至0.0284之间变化,均值为0.0192.从6km至11km的云光学厚度值在0.014至0.23之间变化.观测到的单层高云的厚度最大为6km.4月6日,近年来最强的一次沙尘暴袭击北京.4月7日北京地区无可见云,激光雷达探测结果表明,从4km至10km高度范围内,存在一层厚度约为6km的气溶胶粒子层,消光系数峰值处于8km附近,比晴天无云时的消光系数值约大一个数量级.估计这是一层沙尘气溶胶,系由远距离输送至北京形成的.

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