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地基偏振拉曼激光雷达与CALIPS0星载激光雷达的对比观测研究

温春1,2,黄忠伟1周天1张瑾超1,3辛亚男1,4   


  1. 1.兰州大学大气科学学院,甘肃兰州730000;2.新疆轮台县气象局,新疆轮台841600;
    3.浙江三门县气象局,浙江三门317100;4.甘肃省金昌市气象局,甘肃金昌737100
  • 出版日期:2016-11-01 发布日期:2016-11-01
  • 通讯作者: 黄忠伟,博士,主要从事激光雷达大气遥感与环境监测的研究. E-mail:huangzhongwei@lzu.edu.cn
  • 作者简介:温春(1990-),男,新疆库尔勒市人,助理工程师,主要从事天气预报工作. E-mail:wenchun622@163.com
  • 基金资助:

    国家自然科学基金项目(41375031、41305027、41575017)和中央高校基本科研业务费(lzujbky-2015-k01)共同资助

Contrast Observation of Spaceborne CALIPSO Lidar and a Ground-based Polarized Raman Lidar

WEN Chun 1,2, HUANG Zhongwei 1, ZHOU Tian1,ZHANG Jinchao 1,3, XIN Yanan 1,4
  

  1. 1. College of Atmospheric Science, Lanzhou University, Lanzhou 730000 China;2. Luntai Meteorological
     Bureau of Xinjiang, Luntai 841600, China;3. Sanmen Meteorological Station of Zhejiang Province,
    Sanmen 317100, China;4. Jinchang Meteorological Bureau of Gansu Province, Jinchang 737100, China
  • Online:2016-11-01 Published:2016-11-01

摘要:

云和气溶胶具有显著的气候效应,且存在很大的不确定性,所以获取云和气溶胶的垂直结构信息对于研究全球气候变化具有重要意义。利用兰州大学半干旱气候变化教育部重点实验室自行研制的地基偏振拉曼激光雷达,将2014年3月6日和22日的观测资料与CALIPSO星载激光雷达的观测资料进行对比研究。结果表明:晴天条件下,CALIPSO星载激光雷达和地基激光雷达的反演结果总体上有较好的一致性,而2 km以下的差异主要是因为地基激光雷达受到几何重叠因子的影响。因此,在晴空条件下综合地基和星载激光雷达观测数据,可计算出地基激光雷达的几何重叠因子和盲区;多云条件下,CALIPSO星载激光雷达和地基激光雷达在中高层的观测结果具有较好的一致性,但低层存在较大差异,原因主要可能是由于两者观测方向的不同和云体分布不均。

关键词: 偏振拉曼激光雷达, CALIPSO激光雷达, 云和气溶胶垂直结构, 对比观测

Abstract:

Clouds and aerosols have significant impact on globe climate change, and due to lack of information about clouds and aerosols vertical structure, there is large uncertainty to quantify their climatic effects. Lidar has been well known as a unique remote sensing for measuring the vertical structure of clouds and aerosols with high spatio-temporal resolution. To validate observations of spaceborne lidar, measurements from a developed ground-based polarized Raman lidar in Lanzhou on March 6 and March 22, 2014 were conducted. The results show that observations from CALIPSO lidar and ground-based lidar had a good consistency for clear day except for signals near ground surface because of overlap effect of ground-based lidar. So the geometric overlap factor of ground-based lidar could be calculated from the comparison. For cloudy condition, CALIPSO lidar observations had a good agreement with those of ground-based lidar for high cloud layer, but due to different direction of observation for ground-based and spaceborne lidar or inhomogeneous of cloud in the lower atmosphere, they were different.
 

 

Key words: polarized raman lidar, CALIPSO lidar, vertical structure of clouds and aerosols, comparative observations

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