Measurement of aerosol particles and trace gases in METROMEX

Abstract

Several experiments were conducted in St. Louis during the METROMEX program to determine the properties and formation of aerosol particles. It was found that the average of several distributions obtained during extended periods of time can be approximated by ΔN/ΔDαD-4 for the optical size range. Furthermore, aerosol particles in the plume are growing by coagulation and chemical conversion. The conversion rate of SO2 to sulfate is about 11% h-1 and the sulfate is composed of mixture of an acid and neutralized salt aerosol.