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Special Session 3: Size matters or not, particles export in marine environments |
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Atmospheric chemistry of marine aerosols
Tuesday 10th @ 0920-0945
Room 4
Alexander Laskin* , Pacific Northwest National Laboratory
Presenter Email: alexander.laskin@pnnl.gov
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| Fundamental understanding of the complex atmospheric chemistry of marine aerosols, their physico-chemical properties and environmental impacts is a challenging task because no single method of analytical chemistry is capable of providing the full range of analytical chemistry information. Electron microscopy and micro-spectroscopy approaches can visualize individual particles and their internal structures; however, they largely exclude molecular-level information, and are limited to elemental and chemical bonding characterization. Contemporary methods of high-resolution mass spectrometry can provide detailed information on the molecular content of aerosol organic constituents, but these methods use bulk particle samples and provide no knowledge of the individual particle composition. Therefore, application of complementary analytical methods of chemical analysis is necessary for comprehensive characterization of aerosol properties ranging from bulk molecular composition of aerosol organic constituents to microscopy level details of individual particles. Combined assessment of the results provided by complementary analytical chemistry techniques offers unique insights to understand the composition and physico-chemical properties of marine aerosols determining their environmental and climatic effects. This presentation will give an overview of recent field and laboratory studies of marine atmospheric aerosols with an overall goal to understand fundamental relationship between chemical transformations of airborne particles and their environmental and climate impacts. |
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