Abstract
The physical and chemical characteristics of atmospheric particulate matter (PM) are discussed stepwise by presenting size representations in computer models, size and chemical profiles of various PM sources, mixing states of PM in ambient air, and observed ambient PM compositions in sequence. Photochemical mechanisms of formation for secondary organic aerosol compounds are discussed from a modeling perspective. Health hazards of PM pollution are introduced for professionals and the general public. A systematic method to control PM pollution is elaborated, which includes procedures to implement a successful plan, the functions of a monitoring network, measures to control emissions, and proven methods to reduce human exposure. The challenges of simulating PM in the air are illustrated by the simulation of a PM episode, seasonality of PM constituents, and climate effects on PM pollution.
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