Our research group examines the chemistry of condensed phases in the troposphere, such as fog and cloud drops, airborne particles, and snow. We are interested in how these reactions affect the biogeochemical cycles of various elements (such as nitrogen, carbon, metals, and halides), influence atmospheric composition, and alter the toxicity of particles. As described in more detail below, recent research in our laboratory has focused on three main areas: photochemical reactions in snow and ice, reactions in atmospheric particles and drops, and the potential health effects of respirable particles. Financial support for our research primarily comes from the National Science Foundation, the National Institute of Environmental Health Sciences, the UC Toxic Substances Research & Teaching Program, and the Environmental Protection Agency.
Current projects include: