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Biomass burning is a large and uncontrolled emission of reactive gas phase species and aerosol with major impacts on air quality and climate.  Particularly in the western U.S., the combination of past fire suppression activities and climate

Isoprene, C5H8, is by far the most important biogenic volatile organic compound (BVOC) emitted to Earth’s atmosphere.  It undergoes atmospheric oxidation during the day by OH, and by O3and NO3at night.  The NO3oxidation

The mountain basins of northern Utah, including the urban regions around Salt Lake City and Provo, and the rural regions around Logan, experience some of the most severe particulate matter (PM) air pollution in the U.S.  These events are

The USDA Forest Service Fire Sciences Laboratory in Missoula, Montana is a unique facility where biomass burning emissions can be studied in a controlled environment.  Fuels characteristic of biomass burning in different regions, such as

The urban area of Seoul, South Korea, is one of the largest in the world, with a population of 25 million.  Like other global megacities, it is subject to poor air quality. Nighttime chemistry contributes to atmospheric chemical

Atmospheric chemical transformations, which define the impact associated emissions of primary pollutants, have a strong seasonal dependence. In the warmer and more photochemically active summer months, strong oxidant formation leads to the rapid

CARE-Beijing is an international air quality study focused on understanding the transport and transformation process of air pollution in Beijing and the surrounding North China Plain. Collaborators include the College of Environmental Science and

The NSF sponsored Front Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ) and the NASA sponsored Deriving Information on Surface conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ

Hong Kong is a megacity of 7 million people in the Pearl River Delta Region of China, which has a total population of 120 million. In the fall of 2013, our group traveled to there to make the first measurements of nighttime chemistry within the

Southeast Nexus: Studying the Interactions Between Natural and Anthropogenic Emissions at the Nexus of Climate Change and Air Quality.  SENEX was a NOAA P-3 aircraft campaign based near Nashville, TN with research flights across the