Abstract
Long-path monitoring of pollution and greenhouse gas species has been implemented using the technique of differential optical absorption spectroscopy. The concentrations of CO2, NO2, and SO2 molecules are measured using instrumental setups operating in the near-infrared, visible, and ultraviolet wavelength, respectively. In the case of the visible measurement of NO2, it is found that the data provide information also on the light extinction due to atmospheric aerosols. In addition, the recent progress in the application of a hyper-spectral camera to the two- dimensional observation of air pollutants is briefly discussed.
© 2015 Optical Society of America
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