大气与环境光学学报 ›› 2011, Vol. 6 ›› Issue (1): 11-.

• 大气光学 • 上一篇    下一篇

合肥春季气溶胶结构层探测研究

王珍珠,刘东,钟志庆,谢晨波,范爱媛,戚福弟,王英俭,周军   

  1. (中国科学院安徽光学精密机械研究所大气成分与光学重点实验室,安徽 合肥 230031)
  • 收稿日期:2011-01-07 出版日期:2011-01-28 发布日期:2011-03-10
  • 通讯作者: 王珍珠(1981-),男,汉族,安徽宿州人,博士,主要从事气溶胶探测和辐射效应研究。 E-mail:zzwang@aiofm.ac.cn
  • 作者简介:王珍珠(1981-),男,汉族,安徽宿州人,博士,主要从事气溶胶探测和辐射效应研究。
  • 基金资助:

    科技部基础性研究工作专项重点项目(2007FY110700)资助

Lidar Observation of Aerosol Layers over Hefei in Spring

WANG Zhen-Zhu, LIU Dong, ZHONG Zhi-Qing, XIE Chen-Bo, FAN Ai-Yuan, QIFu-Di, WANG Ying-Jian, ZHOU Jun   

  1. (Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031)
  • Received:2011-01-07 Published:2011-01-28 Online:2011-03-10

摘要:

为了分析造成合肥上空春季自由对流层气溶胶浓度分布高于其他季节的原因,本文对偏振激光雷达2005-2008年期间春季常规测量和加密测量的数据结果进行再分析,从中提取了137组气溶胶结构层进行统计研究,并对2008年3月2日的观测结果作了个例分析。结果表明,特殊气溶胶结构层大多源于沙尘源区气溶胶粒子的远距离传输,其影响高度70%分布在2~4km范围内,退偏振比大于0.1的结构层占据85%,这些结果可用于解释合肥春季自由对流层的气溶胶浓度分布偏高的原因。

关键词: 激光雷达, 气溶胶层, 沙尘, 退偏振比, 后向散射系数

Abstract:

Aerosol data measured by Polarization lidar over Hefei in Spring of 2005-2008 are analysed again. The observational results on Mar. 2nd, 2008 are used for case study and 137 samples of aerosol layers are investigated statistically. The results show that 70% of the average heights for these layers is ranged from 2 to 4 km, and the value of depolarization ratio for them, which is lager than 0.1, takes up to 85%, and these aerosol layers are sourced from the dust particles, which are transported in long range from the dust regions. These results can used to interpret why the aerosol concentration in free troposphere over Hefei in spring is higher than other seasons.

Key words: lidar, aerosol layer, dust, depolarization ratio, backscattering coefficient

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