NO2 vertical concentration monitoring by DIAL with high accuracy

Nianwen Cao; Takashi Fujii; Tetsuo Fukuchi; Naohiko Goto; Koshichi Nemoto; Nobuo Takeuchi

doi:10.1117/12.417099

13 February 2001 NO₂ vertical concentration monitoring by DIAL with high accuracy

Nianwen Cao, Takashi Fujii, Tetsuo Fukuchi, Naohiko Goto, Koshichi Nemoto, Nobuo Takeuchi

Proceedings Volume 4153, Lidar Remote Sensing for Industry and Environment Monitoring; (2001) https://doi.org/10.1117/12.417099
Event: Second International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space, 2000, Sendai, Japan

Abstract

Vertical NO2 concentration profiles, which are important in studies of atmospheric chemistry and urban pollution, were measured by a differential absorption lidar (DIAL) based on a pair ofNd: YAG pumped dye lasers. In the experiment, 448.1 nm and 446.8 am were used for the "on "and "off' wavelengths, respectively. NO2 concentration profiles of 0-40 ppb were obtained for altitude 900 —2250 m with 150 m range resolution. Null error, which was estimated by the deviation ofthe null profile from zero, was <2ppb. The statistical error, systematic error from aerosols, and error due to uncertainty of absorbtion cross section were ?3.35 ppb, <3 ppb and <1 ppb, respectively. The total error was about 5 ppb. The estimation of aerosol backscatter and extinction error in NO2 measurement due to inhomogeneous aerosol distribution is treated in detail.

Citation Download Citation

Nianwen Cao, Takashi Fujii, Tetsuo Fukuchi, Naohiko Goto, Koshichi Nemoto, and Nobuo Takeuchi "NO₂ vertical concentration monitoring by DIAL with high accuracy", Proc. SPIE 4153, Lidar Remote Sensing for Industry and Environment Monitoring, (13 February 2001); https://doi.org/10.1117/12.417099

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