大气与环境光学学报 ›› 2009, Vol. 4 ›› Issue (5): 321-328.

• 环境光学 •    下一篇

北京奥运期间大气光学特征初步分析

赵南京 刘建国 刘文清 陆亦怀 董云升   

  1. (中国科学院环境光学与技术重点实验室,中国科学院安徽光学精密机械研究所 合肥 230031)
  • 收稿日期:2009-06-02 修回日期:2009-06-30 出版日期:2009-09-28 发布日期:2009-09-28
  • 通讯作者: 赵南京(1976-), 博士, 副研究员, 从事应用激光技术、光谱检测技术与方法研究。 E-mail:njzhao@aiofm.ac.cn
  • 作者简介:赵南京(1976-), 博士, 副研究员, 从事应用激光技术、光谱检测技术与方法研究。
  • 基金资助:

    国家高技术研究发展计划项目(2006AA06A302)、中国科学院知识创新工程重要方向项目(KGCX2-YW-119)资助

Analysis on the Atmosphere Optical Characteristics of Beijing Olympic Game by Raman Lidar

ZHAO Nan-Jing, LIU Jian-Guo, LIU Wen-Qing, LU Yi-Huai, DONG Yun-Sheng   

  • Received:2009-06-02 Revised:2009-06-30 Published:2009-09-28 Online:2009-09-28

摘要:

以双波长三通道拉曼激光雷达对2008年北京奥运会期间大气状况进行了测量与分析,给出了奥运主场馆上空气溶胶消光系数、后向散射回波信号及波长消光比垂直分布及时空变化,计算了气溶胶消光散射比、光学厚度及Angstrom波长指数,结合地面监测数据分析了奥运期间典型天气间气溶胶光学特征的变化。结果表明,8日~9日两天空气污染相对较重,主要为较大粒径粒子所致,降雨后气溶胶光学厚度有着明显的升高过程,出现较小粒径污染物的堆积。

关键词: 拉曼激光雷达, 气溶胶, 消光系数, 消光散射比, 光学厚度, Angstrom波长指数

Abstract:

The typical atmosphere optical characteristics of Beijing Olympic Game were measured and analyzed with Raman lidar from Aug. 7 to Aug. 25 in 2008. The vertical profile and spatio-temporal distribution of aerosol extinction coefficient, backscatter signal and the ratio of extinction at different wavelength were shown, and the ratio of aerosol extinction and backscatter, optical depth and Angstrom exponent were calculated respectively. The variability of aerosol optical characteristics and the possible cause of formation were analyzed in combination with the ground level monitoring data. The result shows that the heavy air pollution during Aug. 8~9 in 2008 is mainly caused by biggish size particles, the aerosol optical depth increases with small size contaminations accumulation after rain, and the Raman lidar is a flexible tool for atmosphere optical characteristics measurement.

Key words: Raman lidar, aerosol, extinction coefficient, ratio of extinction & backscatter, optical depth, Angstrom exponent

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