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Observational evidence for pollution-influenced selective uptake contributing to biogenic secondary organic aerosols in the southeastern U.S.
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2017
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Source: Geophysical Research Letters, 44(15), 8056-8064
[PDF-985.00 KB]
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Journal Title:Geophysical Research Letters
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Description:During the 2013 Southern Oxidant and Aerosol Study, aerosol mass spectrometer measurements of submicron mass and single particles were taken at Look Rock, Tennessee. Their concentrations increased during multiday stagnation events characterized by low wind, little rain, and increased daytime isoprene emissions. Organic mass (OM) sources were apportioned as 42% “vehicle-related ”and 54% biogenic secondary organic aerosol (bSOA), with the latter including “sulfate-related bSOA ”that correlated to sulfate (r= 0.72) and “nitrate-related bSOA ”that correlated to nitrate ( r= 0.65). Single-particle mass spectra showed three composition types that corresponded to the mass-based factors with spectra cosine similarity of 0.93and time series correlations of r>0.4. The vehicle-related OM with m/z44 was correlated to black carbon,
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Source:Geophysical Research Letters, 44(15), 8056-8064
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DOI:
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ISSN:0094-8276
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Rights Information:Other
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Compliance:Library
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