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http://dx.doi.org/10.3807/COPP.2018.2.1.015

Raman Lidar for the Measurement of Temperature, Water Vapor, and Aerosol in Beijing in the Winter of 2014  

Tan, Min (University of Science and Technology of China)
Shang, Zhen (University of Science and Technology of China)
Xie, Chenbo (Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences)
Ma, Hui (University of Science and Technology of China)
Deng, Qian (University of Science and Technology of China)
Tian, Xiaomin (University of Science and Technology of China)
Zhuang, Peng (University of Science and Technology of China)
Zhang, Zhanye (University of Science and Technology of China)
Wang, Yingjian (Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences)
Publication Information
Current Optics and Photonics / v.2, no.1, 2018 , pp. 15-22 More about this Journal
Abstract
To measure atmospheric temperature, water vapor, and aerosol simultaneously, an efficient multi-function Raman lidar using an ultraviolet-wavelength laser has been developed. A high-performance spectroscopic box that utilizes multicavity interference filters, mounted sequentially at small angles of incidence, is used to separate the lidar return signals at different wavelengths, and to extract the signals with high efficiency. The external experiments are carried out for simultaneous detection of atmospheric temperature, water vapor, and aerosol extinction coefficient in Beijing, under clear and hazy weather conditions. The vertical profiles of temperature, water vapor, and aerosol extinction coefficient are analyzed. The results show that for an integration time of 5 min and laser energy of 200 mJ, the mean deviation between measurements obtained by lidar and radiosonde is small, and the overall trend is similar. The statistical temperature error for nighttime is below 1 K up to a height of 6.2 km under clear weather conditions, and up to a height of 2.5 km under slightly hazy weather conditions, with 5 min of observation time. An effective range for simultaneous detection of temperature and water vapor of up to 10 km is achieved. The temperature-inversion layer is found in the low troposphere. Continuous observations verify the reliability of Raman lidar to achieve real-time measurement of atmospheric parameters in the troposphere.
Keywords
Lidar; Rotational Raman; Temperature; Water vapor; Aerosol;
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