Seminar

Abstract

Marine phytoplankton and bacteria produce a wide array of reactive gases that are emitted to the atmosphere, where they can impact oxidant concentrations and the production rate of secondary organic aerosol particles. Recently, it has been suggested that chemical and photochemical reactions at the ocean surface contribute to the flux of volatile organic compounds to the marine boundary layer. In this talk I will use a combination of observations from oceanic research cruises and laboratory experiments conducted in a wind-wave channel to explore connections between emissions of reactive trace gases and oxidant and aerosol concentrations in the marine boundary layer. Specific attention will focus on new measurements of ozone deposition in coastal regions.

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Tim Bertram is a professor at the University of Wisconsin Madison in the Department of Chemistry and Biochemistry. His research focuses on heterogeneous atmospheric reactions, air-sea exchange of trace gases, and new instrument development. He began his research career as a summer undergraduate student with Dr. Daniel Murphy, before earning a Ph.D. from the University of California Berkeley. He completed a NOAA Climate and Global Change Postdoctoral Fellowship at the University of Washington, and then began his faculty career at the University of California San Diego in 2009. His recent recognitions include a NASA New Investigator Award and an NSF CAREER Award.