{"89981":{"#nid":"89981","#data":{"type":"event","title":"(11-0208) Prof. Geoff Smith, University of Georgia","body":[{"value":"\u003Cp\u003EProf. Geoff Smith, University of Georgia\n\u003C\/p\u003E\n\u003Cp\u003ELaboratory Studies of the Chemical and Optical Transformations of Organic Aerosols in the Atmosphere\n\u003C\/p\u003E\n\u003Cp\u003EPhysical Chemistry Seminar Series\n\u003C\/p\u003E\n\u003Cp\u003EAerosol particles ranging in size from a few nanometers to several microns in size play many roles in the atmosphere.  Among other things, they influence global warming, climate change and human health.  While they are composed of many things, including inorganic species such as ammonium sulfate and other salts, organic species comprise a large fraction of the particles in many environments.  Despite their importance in determining how particles evolve chemically in the atmosphere, how they take up water, how they interact with clouds and how they scatter or absorb sunlight, much is still not known about these organic aerosols.\n\u003C\/p\u003E\n\u003Cp\u003EThis presentation will highlight recent findings from two projects in my lab designed to learn more about how organic aerosols evolve in the atmosphere.  In the first project, the rates of oxidation in particles by gas-phase species such as O\u003Csub\u003E3\u003C\/sub\u003E, OH, NO\u003Csub\u003E3\u003C\/sub\u003E and Cl are measured using the Aerosol Chemical Ionization Mass Spectrometer (CIMS) developed in our lab.  In the second project, the efficiencies with which oxidized organic particles scatter and absorb UV light are determined using Cavity Ring-Down Spectroscopy. These results will be discussed in the context of how ambient aerosols are \u00e2\u0080\u009caged\u00e2\u0080\u009d chemically and how their optical properties evolve over time as a result.\n\u003C\/p\u003E\n\u003Cp\u003EFor more information contact \u003Ca href=\u0022mailto:paul.wine@chemistry.gatech.edu\u0022\u003EProf. Paul Wine\u003C\/a\u003E (404-894-3425).\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Prof. Geoff Smith, University of Georgia\n\nLaboratory Studies of the Chemical and Optical Transformations of Organic Aerosols in the Atmosphere\n\nPhysical Chemistry Seminar Series","format":"limited_html"}],"field_summary_sentence":[{"value":"Prof. Geoff Smith, University of Georgia"}],"uid":"27275","created_gmt":"2010-12-09 01:00:00","changed_gmt":"2016-10-08 01:46:52","author":"Shirley Tomes","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2011-02-08T15:00:00-05:00","event_time_end":"2011-02-08T16:00:00-05:00","event_time_end_last":"2011-02-08T16:00:00-05:00","gmt_time_start":"2011-02-08 20:00:00","gmt_time_end":"2011-02-08 21:00:00","gmt_time_end_last":"2011-02-08 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"related_links":[{"url":"http:\/\/www.chem.uga.edu\/people\/faculty\/smith_g","title":"Prof. Geoff Smith, University of Georgia"}],"groups":[{"id":"85951","name":"School of Chemistry and Biochemistry"}],"categories":[],"keywords":[{"id":"89","name":"chemistry"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1791","name":"Student sponsored"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EShirley Tomes\u003C\/strong\u003E\u003Cbr \/\u003EChemistry \u0026amp; Biochemistry\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=st81\u0022\u003EContact Shirley Tomes\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404-894-0591\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}