1. Sub-3 nm particle observations in the atmosphere of two sites in Eastern United States.
- Author
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Yu, Huan, Hallar, A. Gannet, Sedlacek, Arthur, Springston, Stephen, Kanawade, Vijay, You, Yi, Lee, Yin-Nan, Wang, Jian, Kuang, Chongai, McGraw, Robert L., McCubbin, Ian, Chirokova, Galina, Mikkilä, Jyri, and Lee, Shan-Hu
- Subjects
PARTICLE size determination ,CONDENSATION (Meteorology) ,ATMOSPHERIC nucleation ,AIR masses ,SULFURIC acid - Abstract
Direct measurement of sub-3 nm particles is crucial for understanding the new particle formation process and its contribution to cloud condensation nuclei (CCN) formation. Sub-3 nm particles measured at Long Island, New York (coastal site) and Kent, Ohio (inland continental site) show that high concentrations of nighttime sub-3 nm particles were present at the coastal site only with marine air masses, whereas nighttime sub-3 nm particle concentrations were significantly low in continental air masses and at the inland continental site. The coastal nighttime sub-3 nm particles did not grow larger. Measured sulfuric acid and Volatile Organic Compounds (VOCs) indicate that the potential source precursors of nighttime sub-3 nm particles may be unknown ocean-originated chemical species other than sulfuric acid and biogenic VOCs (isoprene and monoterpenes). [ABSTRACT FROM AUTHOR]
- Published
- 2013
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