Abstract
Tin concentration in atmospheric aerosols was measured at land and ship-based sites in the northern and southern hemispheres. Tin concetrations were up to three orders of magnitude greater in the northern than in the southern hemisphere, indicating the importance of anthropogenic inputs to the atmospheric tin cycle. Tallahassee, FL aerosol samples showed that tin is correlated with soot carbon in air masses originating in the central U.S., but is not correlated with soot carbon that is locally produced. Factor analysis of dissolved tin and major ions in Tallahassee rainwater indicates a continental pollution source for tin. The dissolved fraction of tin in rain appears to represent only a minor component of the deposition flux and deposition rates of atmospheric tin are consistent with estimated fluxes of tin to the atmosphere. (Michael-PTT)