I am a Postdoctoral Fellow at Dalhousie University and a Visiting Research Associate with the Atmospheric Composition Analysis Group at Washington University in St. Louis. My research focuses on observing climate- and air quality-relevant trace gases (particularly NO2 and ozone) in the atmosphere using satellite observations. Current research projects involve investigating ways to monitor surface NO2 air quality from satellite observations. I have also developed methods for estimating NOx emissions from satellite NO2 observations, and examined NO2 chemistry and transport affect ozone and nitrogen oxide concentrations, particularly in the tropical upper troposphere where ozone is an important greenhouse gas. While my work thus far has been largely focused on ozone and NOx, I am generally interested in issues relating to air pollution and climate. This website contains additional information on my current and past research experience.