Organic Particle Production from the Bubbler and Sea Sweep During CalNex 2010 Amanda Frossard, Lynn Russell, Scripps Institution of Oceanography, UC San.

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Presentation transcript:

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, CalNex Data Meeting

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

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

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

Nascent Marine Aerosol from Bubbling Ambient Sea Water

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

Organic Composition: Bubbler

Northern CA Southern CA

Bubbling Characteristics FineCoarseJets Morning Afternoon Night Southern CA Northern CA San Francisco Bay frit type flow (lpm) = phenol

Marine Aerosol Production: Sea Sweep

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

Organic Composition: Sea Sweep Northern CA Southern CA

Single Particle Sea Sweep Particle Map Hawkins et al High C Low C

Single Particle Sea Sweep Particle Map Hawkins et al High C Low C

Organic Composition: Ambient

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

Ambient Marine Aerosol Marine Factor fraction of OM

Single Particle Ambient Marine Particle Map Hawkins et al High C Low C

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

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