Dave WortonPostdoctoral Research Scientist, University of California -

Berkeley

Research Interests:

• Origins and composition of atmospheric carbonaceous aerosols

• Development of mass spectrometric methods to separate and identify individual organic compounds present in atms aerosols

• Role of volatile organic carbon (AVOC + BVOC) emissions in formation of secondary organic aerosol (SOA)

• Gas-particle partitioning of semi-volatile organic carbon species

Since last Workshop:

• Continued development of automated in-situ Thermal desorption Aerosol Gas chromatograph MS (TAG) instrument with GCxGC separation capability

• BEARPEX phase I summer 2007 – field study in Sierra Nevada Mtns

Biosphere Effects on AeRosols and Photochemistry EXperiment 200710 week study with

full suite of gas phase VOC and aerosol measurements

Focus on both forest-atmosphere

interactions and photochemical

processing within an urban plume

BFRS

Terpenes BEIS3.11 Reference Emissions (moles / km2 / hr)

2 towers4 containers of instruments

Lift for HOx gradients

Ponderosa Pine PlantationPlanted in 1990, canopy height ~7m

Funded Collaboration• Collaboration with Marianne Glasius• Collected filters of PM2.5 during BEARPEX• Polar organics by HPLC-Q-TOF-MS

HPLC-Q-TOF, University of Aarhus

Hi-Vol sampler

Funded CollaborationFilter Collection Period

3 per day x 5 days

first rain

large and rapid temperature and relative humidity transition

hot and dry cooler and more humid

biogenic marker cpds

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