She is an atmospheric chemist with broad interests in air quality, climate, and atmosphere-biosphere interactions. Her research group makes measurements at the Earth’s surface and from onboard aircraft in diverse locations, including polluted cities, agricultural areas, and within forest canopies. She focuses on the role of reactive nitrogen in chemical oxidation mechanisms and emissions of the greenhouse gas nitrous oxide. Her research group works to find solutions to atmospheric problems that adversely affect human health and ecosystems.