[OPTICAL REVIEW Vol. 7, No. 1 (2000) 89-94]

Simultaneous Observation of NO2 Column Density and Aerosol Optical Thickness in Urban Atmosphere

Yanqun XUE, Hiroaki KUZE, Weibiao CHEN, Shinichi KANETA, Tamio TAKAMURA and Nobuo TAKEUCHI

Center for Environmental Remote Sensing, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522 Japan

(Received September 17, 1999; Accepted October 21, 1999)

Ground-based, optical monitoring of the NO2 column density and aerosol optical thickness is described. The instrument consists of a solar radiation spectrometer and a conventional sunphotometer, both mounted on a sun-tracker and operated automatically. From daytime measurements in Chiba during the winter of 1998, variations of NO2 and aerosol are analyzed. Because of the capability of simultaneous, real time measurement, this method is particularly suitable for air pollution studies in city areas.

Key words : NO2 column density, atmospheric aerosol, solar spectrum, sunphotometer