HR: 13:40h
AN: A42E-01    [PDF]
TI: Aerosol mass spectrometer measurements of organic aerosol
AU: * Worsnop, D
EM: worsnop@aerodyne.com
AF: Aerodyne Research Inc, 45 Manning Road, Billerica, MA 01821 United States
AU: Canagaratna, M
EM: mrcana@aerodyne.com
AF: Aerodyne Research Inc, 45 Manning Road, Billerica, MA 01821 United States
AU: Jayne, J
EM: jayne@aerodyne.com
AF: Aerodyne Research Inc, 45 Manning Road, Billerica, MA 01821 United States
AU: Boudries, H
EM: hacene@aerodyne.com
AF: Aerodyne Research Inc, 45 Manning Road, Billerica, MA 01821 United States
AU: Onasch, T
EM: onasch@aerodyne.com
AF: Aerodyne Research Inc, 45 Manning Road, Billerica, MA 01821 United States
AU: Jimenez, J
EM: jose.jimenez@colorado.edu
AF: University of Colorado, UCB 216 CIRES Building, Room 318), Boulder, CO 80309 United States
AU: Slowik, J
EM: slowikja@bc.edu
AF: Boston College, Department of Chemisty, Chestnut Hill, MA 02150 United States
AU: Coe, H
EM: hugh.coe@umist.ac.uk
AF: UMIST, The Physics Department, Manchester, M60 1QD United Kingdom
AB: Organic species are known to be ubiquitous and comprise a significant component of ambient aerosols. Identifying the sources, chemical compositions, and loadings of particulate organics remains a difficult, yet important problem as organic components may affect the formation, hygroscopicity, growth, reactivity, and radiative effects of ambient particles. Unraveling this complexity inherently must rely on chemical information (such as off-line filter analyses and collector/concentrator techniques), but also on real-time instruments that are capable of combining particle physical measurements (size, density) with chemical speciation information. The Aerodyne Aerosol Mass Spectrometer (AMS) has been deployed on many different measurement platforms around the world and is generating a rich data set capable of providing insight into the complexity of particulate organics. Highlights of the aerosol measurements will be presented. Although the AMS cannot uniquely classify individual organic compounds, it has been become evident that classes of organic compounds can be identified. These include the identification of a size-resolved chemical signature for fresh diesel and gasoline particulate emissions. Electron impact ionization mass spectral signatures of oxidized organic components and the temporal and spatial relationships between the signatures for fresh organic emissions and aged/oxidized organic components. Laboratory studies on soot and other organic aerosols will also be presented within this context.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0345 Pollution--urban and regional (0305)
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting