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Proceedings Paper

NO2 vertical concentration monitoring by DIAL with high accuracy
Author(s): Nianwen Cao; Takashi Fujii; Tetsuo Fukuchi; Naohiko Goto; Koshichi Nemoto; Nobuo Takeuchi
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Paper 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.

Paper Details

Date Published: 13 February 2001
PDF: 8 pages
Proc. SPIE 4153, Lidar Remote Sensing for Industry and Environment Monitoring, (13 February 2001); doi: 10.1117/12.417099
Show Author Affiliations
Nianwen Cao, Central Research Institute of Electric Power Industry (Japan)
Takashi Fujii, Central Research Institute of Electric Power Industry (Japan)
Tetsuo Fukuchi, Central Research Institute of Electric Power Industry (Japan)
Naohiko Goto, Central Research Institute of Electric Power Industry (Japan)
Koshichi Nemoto, Central Research Institute of Electric Power Industry (Japan)
Nobuo Takeuchi, Chiba Univ. (Japan)


Published in SPIE Proceedings Vol. 4153:
Lidar Remote Sensing for Industry and Environment Monitoring
Upendra N. Singh; Kazuhiro Asai; Toshihiro Ogawa; Upendra N. Singh; Toshikasu Itabe; Nobuo Sugimoto, Editor(s)

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