THE SOURCE CHARACTERIZATION AND CHEMICAL-CHANGE OF AMBIENT AROMATIC-HYDROCARBONS

Aromatic hydrocarbons in the atmosphere transported over long distance s, were measured in rural and urban areas in order to determine their source characterization and chemical behavior. The aromatic hydrocarbo ns emitted from different sources with characteristic ratios are chemi cally changed depending on their reactivity with OH radicals. Comparin g the observed relative contents of Cs aromatic hydrocarbons with the characteristic ratios of each source, photochemical aging was observed in field measurements performed on the top of a mountain, in a coasta l area, and oil the meteorological observation tower. Copyright (C) 19 96 Elsevier Science Ltd