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SPACCS 2008 S torm P eak A erosol and C loud C haracterization S tudy

SPACCS 2008 S torm P eak A erosol and C loud C haracterization S tudy. Storm Peak Laboratory, Steamboat Springs, CO Study: March 24 – April 14, 2008 Scientific Questions: What is the composition of aerosols at this site? Organic composition Biological particles

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SPACCS 2008 S torm P eak A erosol and C loud C haracterization S tudy

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  1. SPACCS 2008 Storm Peak Aerosol and Cloud Characterization Study • Storm Peak Laboratory, Steamboat Springs, CO • Study: March 24 – April 14, 2008 • Scientific Questions: • What is the composition of aerosols at this site? • Organic composition • Biological particles • What are the sources of the aerosols at this site? • Do these particles act as CCN or IN? • What organics and biological components are observed in the clouds? Snow? • Can observations be used to parameterize cloud-aerosol models? • How important are biological particles to impacting cloud characteristics? BEACHON, NSF Biogenic SOA Workshop, DRI

  2. Measurements • Meteorology • Wind speed/direction • Temperature, potential temperature • Relative Humidity • Vertical profile of T/RH up mountain • Gas-phase concentrations • Ozone • CO (Thom Rahn, LANL, GC) • CO2 (Brit Stephens, NCAR) • CO2 Isotopes (Thom Rahn, LANL, Cavity Ring Down) • Water Vapor (Thom Rahn, LANL, Cavity Ring Down) • GEM and Reactive Mercury (Daniel Obrist, DRI)

  3. Measurements Continued • Aerosols • SMPS/APS (SPL) • Particle number concentrations: ~8nm - ~15 mm • CCN • PM2.5 and PM10 OC/EC (Eszter Horayni, CU, Sunset Labs) • PM2.5 and PM10 High Vol Filter samplers (NCAR/CU) • Low Pressure Impactor (Kelly Baustian, CU) • Cloud Water • Organic analysis (Lynn Mazzoleni, LANL) • Biological particles • Bacteria counts, DNA sequencing, IN assays (Bob Bowers & Noah Frier, CU) • Snow water samples (Brent Christner, LSU) • Cloud Samples (Duane Moser, UNLV)

  4. Current Analysis • Three components: 1) Meteorology • Met. Data Analysis (Christine Wiedinmyer) • Boundary layer dynamics • Trajectory Modeling 2) Aerosol Analysis • OC/EC Ratios • Number and Mass Analysis • Current estimates: PM10 mass concentrations: 0.5 – 4 mg/m3 • Nucleation events • Organic composition • Bulk filter analysis: • Polar Marker compounds (Marianne Glasius) • Marker compounds (Mike Hannigan, Jim Pankow) • Elemental analysis (Lynne Mazzoleni) • Raman Microscope (single particle analysis: Kelly Baustian) 3) Biological Components • Bacteria Counts • DNA analysis (Noah Fierer and Duane Moser) • Ice Nucleation activity (Drop freeze assays)

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