HR: 0830h
AN: A51D-0708    [PDF]
TI: Aerosol mass spectrometer measurements at Harvard Forest during NEAQS 2002
AU: * Canaragatna, M
EM: mrcana@aerodyne.com
AF: Aerodyne Research Inc, 45 Manning Road, Billerica, MA 01821 United States
AU: Slowik, J
EM: slowikja@bc.edu
AF: Boston College, Department of Chemistry, Chestnut Hill, MA 02467 United States
AU: Davidovits, P
EM: paul.davidovits@bc.edu
AF: Boston College, Department of Chemistry, Chestnut Hill, MA 02467 United States
AU: Worsnop, D
EM: worsnop@aerodyne.com
AF: Aerodyne Research Inc, 45 Manning Road, Billerica, MA 01821 United States
AB: An Aerosol Mass Spectrometer (AMS) was installed on a 30 m high platform at Harvard Forest during the New England Air Quality Study (NEAQS) 2002, a multi agency campaign designed to characterize gas and aerosol pollutants passing through the northeastern U.S. and the outflow over the Atlantic Ocean. The AMS provided size and chemically speciated aerosol mass loadings for nitrates, sulfates, ammonium, chloride and organic carbon. The Harvard Forest site is situated in a rural setting in central Massachusetts, with few known local sources of particulate sulfates and nitrates. Despite the location, Harvard Forest was subjected to several large particulate mass pollution events during July and August 2002. A detailed back trajectory analysis correlates the large, sulfate dominated particle events with source emitters (cities, power plants, etc.) in the region, mainly west of Harvard Forest. Comparisons with G1 aircraft data support the hypothesis that much of the boundary layer particulate matter is generated and transported within the North Eastern region and not transported long distances from outside regions within the US. A well defined example of long distance transport was observed on July 9th when mass spectral markers for biomass burning correlated with high CO levels identifying a Quebec fire plume. Results from a comprehensive study to apportion the sulfate and organics loadings with respect to sources will be presented.
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