The major research of ASRC Zhang research group involves the study of chemical and physical processes impacting the fate of anthropogenic and biogenic emissions and their effects on air quality, the climate system, and global cycles of atmospheric species. We specializes in measurements of atmospheric trace gases and aerosols; especially those involved in tropospheric ozone production and airborne particulate matter. Another major area of research is aimed at developing instrumentation for the measurement of chemical composition of the atmosphere, primarily the more reactive species.