1. Dave Worton Postdoctoral 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

2. Biosphere Effects on AeRosols and Photochemistry EXperiment 2007 10 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 / km 2 / hr)

3. 2 towers 4 containers of instruments Lift for HO x gradients Ponderosa Pine Plantation Planted in 1990, canopy height ~7m

4. Funded Collaboration Collaboration with Marianne Glasius Collected filters of PM 2.5 during BEARPEX Polar organics by HPLC-Q-TOF-MS HPLC-Q-TOF, University of Aarhus Hi-Vol sampler

5. Funded Collaboration Filter 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 256