Research and Teaching Topics
Tropospheric aerosol particles: sources and fates of air pollutants, aerosol dynamics, regional air quality and health effects, particle radiative and cloud activation properties.
Development of particle measurement systems: measurements of fine and coarse particle chemical composition, nanoparticles. Instrumentation developed for deployment on large aircraft and small remotely piloted aircraft, and for long term monitory at air quality network sites.
Current Research Projects
1. Studies on the spatial distribution and sources of Secondary Organic Aerosol (SOA) and biomass burning smoke in Georgia - Funded by EPRI, the Southern Company, and Georgia Department of Natural Resources.
2. Investigating Secondary Organic Aerosol Formation (SOA) in the South Eastern US through simultaneous measurements of gas and particle concentrations - Funded by NSF.
3. Development of instruments for continuous online measurement of PM2.5 chemical composition suitable for deployment at network monitoring sites, focusing on Ion Selective Electrodes and the use of a Liquid Wave Guide Capillary Cell for measurements of water soluble metals (e.g., Fe(ii)). Funded by US EPA.
4. Participation in the 2006 winter/spring joint NSF/NASA experiment investigating sources and processing of air pollutants over Mexico City (MIRAGE-MEX), and the inflow of pollutants from Asia to North America, (NASA INTEX-B). Instrumentation deployed for aerosol chemical composition measurements on the NSF C-130 aircraft for both missions - Funded by NASA.
5. Measurements of fine partilce composition from the NASA DC-8 for studies of Arctic Haze and Borial forest fire emissions - NASA funding.