Research Interests

• Air quality modeling
• Photochemical air pollution
• Atmospheric chemistry
• Inverse methods and parameter estimation
• Air pollution policy and management
• Environmental law

Current Research Projects

• Atmospheric Aerosols from Biogenic Hydrocarbon Oxidation
  The goal of this research is to estimate contributions of biogenic volatile organic compounds (BVOC) to secondary aerosol production in the eastern United States. The project focuses on contributions from oxidation of monoterpenes and sesquiterpenes (SQT), and seeks to understand the influence of environmental conditions, background oxidant concentrations, and land management practices. (Co-investigators: Detlev Helmig, Christine Wieinmyer (NCAR), Alex Guenther (NCAR), Peter Harley (NCAR), Tanarit Sakulyanontvittaya); Sponsor: U.S. Environmental Protection Agency).
  
• Improved Measurement of Exposure to PM2.5
  Exposures to airborne particles less than 2.5 microns in diameter (PM2.5) pose significant health risks. The objective of this research is to improve our understanding of the composition and potential sources of PM2.5 in personal exposure samples, by (a) adapting existing organic speciation and quantification techniques to smaller PM2.5 sample quantities while reducing analysis time and expense and (b) developing and testing source apportionment techniques that specifically focus on personal PM2.5 exposures. (Co-investigators: Michael Hannigan, Gregory Brinkman)