Measurement of atmospheric pollutantsusing differential optical absorption spectroscopy (DOAS)with a PC projector light source

摘要

The purpose of this study is to demonstrate the capability of the PC projector as a DOAS lightsource. The long-path, continuous measurements have actually been performed, and the result-ing concentrations of pollutants are compared with the data from nearby ground-based monitor-ing stations. We report the results of three recent campaigns: Seoul city in South Korea (August2007), Nagano city (November 2007) and Chiba city (December 2007) in Japan. We measuredoptical thickness due to NO2 absorption and aerosol extinction in the lower troposphere (atmos-pheric boundary layer) using nearly horizontal optical paths in a height range of 15-100m fromthe ground level.