Robert A. Harley

TL;DR: It is shown that human exposure to carbonaceous aerosols of fossil origin is transitioning away from transportation-related sources and toward VCPs, and the focus of efforts to mitigate ozone formation and toxic chemical burdens need to be adjusted.

TL;DR: In this paper, a Lagrangian trajectory model simulating the formation, transport and deposition of secondary organic aerosol is developed and applied to the Los Angeles area, for the air pollution episode of 27-28 August 1987.

TL;DR: In this paper, the authors measured gas and particle-phase pollutant concentrations in the Caldecott Tunnel in the San Francisco Bay Area during the summer of 1996 and found that heavy-duty diesel trucks were the major source of lighter particles, whereas light-duty gasoline vehicles were the dominant source of higher molecular weight particles such as benzo[a]pyrene and dibenz[a,h]anthracene.

TL;DR: In this article, the authors quantified polycyclic aromatic hydrocarbon (PAH) emissions in gasoline and diesel fuel samples collected in summer 1997 in northern California and found that Naphthalene was the predominant PAH in both fuels.

TL;DR: This work characterize the chemical composition, mass distribution, and organic aerosol formation potential of emissions from gasoline and diesel vehicles, and finds diesel exhaust is seven times more efficient at forming aerosol than gasoline exhaust.