Smog Chamber Measurements

Photochemical smog still remains an issue in urban areas. Various smog chambers have been used to examine atmospheric processes of the formation of ozone and secondary organic aerosols. Prior to conduct smog chamber experiments, spectrum and intensity of light sources and chamber wall effects need to be characterized. Experimental techniques such as light intensity control, temperature control, comparison of twin chambers are also required to obtain more reliable and useful data from smog chamber experiments. Smog chamber experiments can be classified into indoor and outdoor chamber studies or VOCs–NOx–air mixture and ambient air experiments. Some typical and important investigations from previous smog chamber experiments are introduced here. Finally, applications of smog chamber experiments are demonstrated for diesel exhaust and indoor air chemistry.