Profiling of SO2, NO2, and O3in the lower troposphere by multiwavelength differential absorption lidar

Takashi Fujii*, Tetsuo Fukuchi, Takuya Nayuki, Hiroshi Hayami, Koshichi Nemoto, Nobuo Takeuchi


研究成果: Conference article査読

3 被引用数 (Scopus)


We performed SO2, NO2, and O3 measurements in the lower troposphere using a multiwavelength differential absorption lidar (MDIAL) system. Measurement results are compared with results of airborne and ground-based in-situ measurements performed simultaneously with lidar measurement. Vertical concentration variation of SO2 with 0-7 ppb for 1000-1700 m altitude was measured by dual-DIAL, and those of NO2 and O3 with 0-50 ppb for 700-2000 m altitude were measured by 2-wavelength DIAL quasi-simultaneously. Measurement results suggest that NO2 was trapped below the inversion layer, which induced the reduction of O3 concentration by the reaction with NOX. Comparison of results obtained by DIAL and by in-situ methods showed that the MDIAL system had sufficient accuracy for verification of long-range transport models of sulfur compounds and for observation of chemical reactions of oxidants and nitrogen oxides. We also performed simultaneous profiling of NO2 and O3 in the lower troposphere using a stable, high power transmitter for NO2 measurement. Concentration variations of NO2 and O3 for 900-1350 m altitude were measured for a continuous time interval of 24 hours without maintenance.

ジャーナルProceedings of SPIE - The International Society for Optical Engineering
出版ステータスPublished - 2003
イベントLidar Remote Sensing for Industry and Environment Monitoring III - Hangzhou, China
継続期間: 2002 10月 242002 10月 25

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学


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