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My group studies how human activities and natural systems impact the composition and chemistry of the atmosphere and the subsequent effects on air quality, climate, and ecosystem health. Measurements provide critical constraints on emission inventories and model output, and to this end, we develop and deploy novel sensors that provide observations at unprecedented scales in space and time. We also synthesize our field measurements with satellite products to bridge scales from hours to years and from neighborhoods to the globe. My group conducts the measurements as part of larger field studies and works closely with laboratory and modeling teams in these campaigns. Research foci include urban emissions of greenhouse gases and air pollutants, trace gases important to aerosol and cloud formation, and fluxes of nitrogen and carbon to/from the atmosphere in managed (agriculture) and natural systems. In short, the Earth’s atmosphere is our laboratory - it is complex, dynamic, and full of mysteries.

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