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Organic Particle Production from the Bubbler and Sea Sweep During CalNex 2010

Organic Particle Production from the Bubbler and Sea Sweep During CalNex 2010. Amanda Frossard, Lynn Russell, Scripps Institution of Oceanography, UC San Diego William Keene, John Maben, Department of Environmental Science, University of Virginia Timothy Bates, and Patricia Quinn

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Organic Particle Production from the Bubbler and Sea Sweep During CalNex 2010

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  1. Organic Particle Production from the Bubbler and Sea Sweep During CalNex 2010 Amanda Frossard, Lynn Russell, Scripps Institution of Oceanography, UC San Diego William Keene, John Maben, Department of Environmental Science, University of Virginia Timothy Bates, and Patricia Quinn Pacific Marine Environmental Laboratory, NOAA January 12, 2011 - CalNex Data Meeting

  2. Overview • Comparison of marine organic particle composition from the UVa Bubbler, Sea Sweep, and Ambient Marine Factor

  3. Overview • Comparison of marine organic particle composition from the UVa Bubbler, Sea Sweep, and Ambient Marine Factor

  4. Methods • Fourier transform Infrared (FTIR) spectroscopy of filter samples to get overall organic massand functional groups • Scanning transmission x-ray microscopy near edge absorption fine structure (STXM-NEXAFS) to get morphology and composition of single particlesimpacted on sample windows

  5. Nascent Marine Aerosol from Bubbling Ambient Sea Water

  6. Marine Aerosol Production: Bubbler Bubbler Outlet Sampled at 80% RH No diameter size cut “Bulk aerosol”  sub and super micrcon 1 pair of Teflon filters Vacuum Pump

  7. Organic Composition: Bubbler

  8. Organic Composition: Bubbler Northern CA Southern CA

  9. Bubbling Characteristics Fine Coarse Jets frit type flow (lpm) 4.2 2.6 3.2 3.4 1.9 1.7 Morning Southern CA Northern CA San Francisco Bay Afternoon = phenol Night

  10. Marine Aerosol Production: Sea Sweep

  11. Organic Aerosol Sampling: Sea Sweep and Ambient Mass Flow Meter and Controller Total: 16.8 lpm PM1 Cyclone Dried to 55% RH 2 pairs of Teflon filters Vacuum Pump

  12. Organic Composition: Sea Sweep Northern CA Southern CA

  13. Single Particle Sea Sweep High C Particle Map Low C Hawkins et al. 2010

  14. Single Particle Sea Sweep High C Particle Map Low C Hawkins et al. 2010

  15. Organic Composition: Ambient

  16. Ambient Marine Aerosol Marine Factor Alcohol: 62% Acid: 9% Alkane: 20% Amine: 9% Makes up on average 13% of total OM Similar to marine insoluble organic standards Russell et al. 2010

  17. Ambient Marine Aerosol • Marine Factor fraction of OM

  18. Single Particle Ambient Marine High C Particle Map Low C Hawkins et al. 2010

  19. Summary • Sea sweep, bubbler, and ambient marine factor show similar organic functional group composition • Single particles from the Sea Sweep and clean marine samples have particle morphologies and absorption spectra similar to other observed marine particle

  20. Thanks! • Acknowledgements: • Scientists and crew of R/V Atlantis • Crew at the LBNL Beamline • PMEL Atlantis Group • Russell Group • PNNL Group and Dan Czizco

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