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Organic Compounds Measured in PM2.5 During Neops

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Abstract: Secondary formation of submicron ambient particulate matter occurs when organic and inorganic constituents having sufficiently low volatility condense onto preexisting particles in the atmosphere. The presence of the resulting submicron particles has led to three important environmental problems. First, visibility degradation leading to haze occurs due to light scattering imposed by these particles. This problem is especially pronounced in the Southeastern United States during the summertime because of high temperatures and high relative humidities (Sisler and Malm, 1994), which result in high levels of particle liquid water leading to increases in the particle diameter. Second, submicron particles are associated with changes in radiative forcing and may be expected to influence the factors leading to global climate changes (Charlson et al., 1992). Finally, epidemiological studies (Schwartz et al., 1996) have implicated fine particulate matter with increased mortality and morbidity in selected urban areas. Since the specific causal agents for observed adverse health effects are not presently known, it has become an important task to chemically characterize the specific organic components of ambient fine particulate matter as completely as possible.

This work has been funded wholly or in part by the United States Environmental Protection Agency under Contract 68-D00-206 to ManTech Environmental Technology, Inc. It has been subject to Agency review and approved for publication. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.
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Citation:Edney, E. O., R. E. Speer, T. E. Kleindienst, E. W. Corse, and C. D. Mciver. Organic Compounds Measured in PM2.5 During Neops. Presented at 83rd American Meteorological Society Annual Meeeting, Long Beach, CA, February 9-13, 2003.
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Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
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Division: Human Exposure & Atmospheric Sciences Division
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Branch: Process Modeling Research Branch
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Product Type: Abstrct/Oral
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Presented: 02/09/2003
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Related Entries:
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Bullet Item Science Version of PM Chemistry Model
spacer Relationship Reason:   A Project of the Product
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Last Updated on Monday, October 22, 2007
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