Faculty & Labs
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- Graduate Programs
- Areas of Research
- Transportation - In-use motor vehicle emissions and their effect on air pollution
- Urban and Regional Smog - Source/receptor modeling of particles and gases; interbasin transport of air pollutants throughout the United States; dry deposition of acidic gases and particles
- Agricultural Emissions - Sources and generation mechanisms of PM10 fugitive dust
- Global Climate Change - Aerosol effects on radiation balance, spatial and temporal distribution of regional aerosols on continental scales
- Visibility Degradation - Visibility/particle relationships in the atmosphere
- Graduate Programs
- Areas of Research
- Air Pollution and Health - Atmospheric aerosols, roadway impacts health; proposed and helped pass AB1870 (2006) adding an aerosol component to Smog Check II
- Transportation - Aerosol emissions, cars, trucks and trains
- Urban and Regional Smog - Lake Tahoe studies, aerosol impact on visibility and lake clarity, 1972 – present;
- Indoor Air Quality - Indoor ultra fine aerosols at schools near roadways as volunteer with Breathe California of Sacramento-Emigrant Trails
- Visibility Degradation - Aerosols and visibility, national parks and wilderness areas, IMPROVE PI, 1988-1997
- Graduate Programs
- Areas of Research
- Urban and Regional Smog - Laboratory measurements of physical properties of atmospheric particulate matter and their chemical evolution.
- Global Climate Change - Optical properties (absorption, scattering) of particles and how they are affected by chemical and physical transformations in the atmosphere
- Visibility Degradation - Field measurements of optical properties of particles in urban and rural environments.
- Graduate Programs
- Areas of Research
- Air Pollution and Health - Particle sampling and characterization for in vitro and in vivo exposure studies.
- Transportation - Characterization of particles emitted from transportation sources including aircraft, automotive, and railway.
- Urban and Regional Smog - Sampling and analysis of ambient particulate in support of source apportionment studies and atmospheric pollution transport.
- Agricultural Emissions - Particle emission measurement from agricultural sources including dairies and other Confined Animal Facility Operations (CAFO) sites.
- Global Climate Change - Quantification of long-range particle transport and transformation. Ground-truth observations for climate model calibration related to long-range dust transport.
- Indoor Air Quality - Quality assurance of air sampling protocols, particle and gaseous sampling and analysis of indoor pollutants related to human health impacts.
- Visibility Degradation - Ambient sampling and analysis of particles in Class 1 visual areas including National Parks and Monuments. Study of particle pollution source and concentration related to visibility reduction in US National Parks.
- Graduate Programs
- Areas of Research
- Air Pollution and Health - Chemical characterization of potentially toxic or carcinogenic particulate matter, new technique development to characterize organic functional groups using FTIR and characterize elements using high-volume sampler and ICP-MS, radical generation due to par
- Urban and Regional Smog - Laboratory studies of the formation of secondary organic aerosols.
- Global Climate Change - Atmospheric transformation of organic particles and their impact on regional climate.
- Visibility Degradation - Work with the IMPROVE group at UCDavis which measures the concentration and composition of visibility reducing particles in all the National Parks in the U.S.
- Graduate Programs
- Areas of Research
- Air Pollution and Health - Characterization and source apportionment of airborne particles in fine and ultrafine size fractions.
- Transportation - Measurement of particle size and composition in tailpipe emissions.
- Urban and Regional Smog - Source-oriented airshed modeling for California and the eastern U.S.
- Agricultural Emissions - Ozone formation potential of agricultural emissions sources including dairy cows.
- Global Climate Change - Impact of climate change on air pollution including feedbacks on local meteorology.
- Visibility Degradation - Source contributions to visibility reduction in California.
- Graduate Programs
- Areas of Research
- Visibility Degradation - IMPROVE aerosol monitoring program; measurements at 170 remote sites nationwide
- Graduate Programs
- Areas of Research
- Urban and Regional Smog - Regional scale modeling of aerosols; diagnostic studies of regional scale observations of aerosols.
- Global Climate Change - Diagnostic studies of modeled global aerosol properties.
- Visibility Degradation - Regional scale modeling