Use of electronic cigarettes (e-cigarettes) is growing rapidly worldwide. Unlike conventional tobacco products, e-cigarette regulation at U.S. local, state and federal levels is minimal. Although e-cigarettes represent a diverse group of devices, most operate by heating a liquid that typically contains nicotine and various flavorants in a matrix of glycerol, propylene glycol or both into an aerosol that is inhaled by the user. E-cigarette use is likely less risky than combusted tobacco products; however, the short and long-term health effects associated with use of these products and with secondary or tertiary exposures to e-cigarette aerosols are largely unknown. E-cigarettes also appear to appeal to youth and may initiate nicotine addiction in this population. This symposium will lead off with a plenary by Jon Samet titled “Electronic Cigarettes: Evidence, Uncertainty, and Policy” followed by sessions on Formulation, Generation, Particle Deposition, and Health Effects to provide a comprehensive overview of current research and future research needs in this growing field.
Due to the physical and chemical complexity of aerosol particles and the interdisciplinary nature of aerosol science that involves physics, chemistry, and biology, our knowledge of aerosol particles is rather incomplete; our current understanding of aerosol particles is limited by averaged (over size, composition, shape, and orientation) and/or ensemble (over time, size, and multi-particles) measurements. Physically, single aerosol particles are the fundamental units of any large aerosol ensembles. Chemically, single aerosol particles carry individual chemical components (properties and constituents) in particle ensemble processes. Therefore, study of single aerosol particles can bridge the gap between aerosol ensembles and bulk/surface properties and provide a hierarchical progression from a simple benchmark single component system to a mixed phase multicomponent system. Recent technological advances provide exciting new opportunities to study single aerosol particles and to further develop single aerosol particle instrumentation.
The purpose of this special symposium is to bring together an interdisciplinary group of researchers with expertise and interest in single aerosol particle studies including, but not limited to, single aerosol particle manipulation, single aerosol particle measurements, single aerosol particle’s physical, chemical and biological properties, and single aerosol particle instrumentation. Submissions in all areas related to single aerosol particles are welcome.
The extent to which emissions from human activities alter the oxidation of biogenic VOCs is largely undetermined. Anthropogenic pollutants such as NOx and SO2 can interact with BVOC to impact the oxidative capacity of the atmosphere, ozone formation, and contribute to ambient fine particle loading through formation of SOA. Anthropogenic NOx plays a critical role in governing SOA formation, chemical composition, and properties where the radical chemistry and oxidation pathways are drastically different in environments of different NOx levels. NOx does not only influence photochemistry during daytime, but also plays an important role in nighttime chemistry where NO3 radical oxidation of BVOC leads to organic nitrates and SOA formation. Anthropogenic SO2 can also alter gas-phase oxidation chemistry and sulfate provides specific conditions for reactive uptake of soluble gases and particle-phase reactions (e.g., acidity, particle water, particles surface area, particle volume, etc). This symposium solicits contributions presenting results and insights into the effects of anthropogenic NOx and SO2 on BVOC oxidation and aerosol formation from laboratory, field, and modeling studies.
April 29 – Abstract Submission Deadline
July 22 – Early Bird Registration Deadline
July 22 – Late Breaking Poster Abstract Deadline
September 24 – Doubletree Hotel Room Reservation Cut-off
October 17 – 21 – AAAR 35th Annual Conference
Oregon Convention Center
777 NE MLK, Jr. Blvd.
DoubleTree by Hilton Portland
100 NE Multnomah Street
7/22/16 to 8/14/16