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Photo: E. Andrieski, APResearch Highlight Ozone Pollution: Emissions from oil and natural gas production linked to ozone formation along the Front Range.

Tropospheric Chemistry

Dr. Thomas B. Ryerson, Program Lead (acting)
Jane August, Secretary (303) 497-4165

NOAA ESRL Chemical Sciences Division
325 Broadway R/CSD7
Boulder, CO 80305 USA


The focus of our research group is to improve understanding of atmospheric processes that underlie regional and continental air quality and the influence that these processes have on climate change, regionally and globally. The goal of our research is to enhance our ability to predict and monitor future changes, leading to improved scientific information in support of decision making.


Staff in our group develop and deploy state-of-the-art instruments to measure important atmospheric gas species from ultra-trace levels to the extremely high concentrations found at emission sources. Field studies are critical to our research: Recent field work has included long-term monitoring, short-term limited deployments, and intensive regional campaigns using multiple platforms.

Research platforms used for field campaigns.

Research platforms used for field campaigns: NOAA WP-3D aircraft, NOAA R/V Ronald H. Brown, typical ground site.


Our research group works in close coordination with other CSD and ESRL groups involved in measurements of atmospheric transport and mixing phenomena, aerosol measurements, laboratory studies, and modeling studies to explore all aspects of the processes in the atmosphere that influence air quality and climate.

Current Projects


Understanding the atmospheric impact of rapidly expanding oil and gas operations.

Recent Publications

Recent Publications

Finding discrepancies between modeled and observed air circulation in the atmosphere.



Tropospheric chemical research data from major field campaigns.