Understanding the impact of pollution aerosol from Los Angeles/Long Beach on clouds and radiation in and upwind of the EPCAPE study domain
Funding: DOE; Collaboration with Prof. D. Collins and A. Metcalf + SCILLA Science Team
  • Online, airborne measurements of aerosol composition in clear sky, cloud residuals, and downstream of a flow reactor aboard the Naval Postgraduate Shool's Twin Otter
Organic Aerosol Composition in Queretaro, Mexico
Funding: UC MexUS; Collaboration with Prof. D. Salcedo
  • Offline analysis of organic aerosol components using UPLC-ESI-ToFMS
Atmospheric Chemistry of Methylated Selenium and Sulfur species
Funding: NSF; Collaboration with Prof. D. Collins and Y-H. Lin
  • SOA formation from oxidation of methylated selenium and sulfur species
  • Characterizing physicochemical properties of the SOA
Road Dust Measurements in Southern California
Funding: CalTrans; Collaboration with Prof. V. Venkatram and Prof. Hopkins
  • Estimating contribution of road dust to PM2.5 and PM10
  • Developing a model to predict road dust emissions
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Atmospheric Science and Chemistry mEasurement NeTwork (ASCENT)
Funding: NSF; Collaboration with Prof. N. Ng, A. Russell and Dr. A. Dillner
  • First fast, continuous, longterm network for aerosol composition and size distribution measurements
  • Includes 12 sites at urban, suburban, and remote locations in the US
  • Rubidoux site (pictured below) is up and running as of April 2023.
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Measurements of Secondary Aerosol Formation in California
Funding: CARB; Collaboration with Prof. D. Collins and C. Ivey
  • 4-phase measurements in EJ communities of Southern and Central California
  • Investigating ambient and perturbed- ambient formation of secondary aerosols using CAGE chambers and APPA flow reactors
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SOA Formation from Oxidation of Heterocyclic VOCs
Funding: NSF; Collaboration with Prof. Y.-H. Lin and H. Zhang
  • Nighttime SOA formation and light absorption properties
  • Influence of photochemical aging on SOA absorption
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Aerosol Measurements in Long Beach
Funding: South Coast- AQMD
  • Community-based air quality measurements as part of AB 617
  • Chemical composition and size distribution measurements of aerosols
  • Source apportionment
Smog Chamber Oxidation Experiments
Funding: NSF
  • Smog chamber generation of secondary organic aerosol (SOA) from various precursors and oxidants
  • Linking SOA composition and optical properties
  • Investigating brown carbon (BrC) formation
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Aerosol Sampling in Imperial Valley
Funding: UC Agriculture and Natural Resources, USGS, USDA, UCR RED
Phase 1:
  • Size-dependent aerosol filter sample collection at Salton City and Bombay Beach
  • Trace metal content of aerosols, as well as arid soil and playa around Salton Sea
  • Source characterization of PM10
Phase 2:
  • Year-long passive aerosol sample collection at 5 locations around Salton Sea/Imperial Valley
  • Trace metal and ionic composition
  • Temporal and spatial distribution of playa emissions
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FRAPPE Field Project
Funding: Colorado Department of Public Health and Environment, NSF
  • Online aerosol composition and optical extinction measurements on board the NSF-C130 aircraft
  • Summertime aerosol sources and impacts in the Colorado Front Range
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Engine Exhaust Emission Testing
Collaboration with UCR CE-CERT Scientists
  • Optical properties of primary aerosols from PFI/GDI vehicles
  • Aerosol absorption and scattering in the exhaust of a small marine engine
  • Composition of SOA generated in flow tube oxidation of vehicle exhaust