globalchange  > 气候减缓与适应
DOI: 10.1002/2017JD027851
Scopus记录号: 2-s2.0-85049866989
论文题名:
Influence of Emissions and Aqueous Processing on Particles Containing Black Carbon in a Polluted Urban Environment: Insights From a Soot Particle-Aerosol Mass Spectrometer
作者: Collier S.; Williams L.R.; Onasch T.B.; Cappa C.D.; Zhang X.; Russell L.M.; Chen C.-L.; Sanchez K.J.; Worsnop D.R.; Zhang Q.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:12
起始页码: 6648
结束页码: 6666
语种: 英语
英文关键词: BC soot particles ; fog processing ; PM composition ; San Joaquin Valley (SJV) ; SP-AMS ; wood burning
Scopus关键词: aerosol ; aerosol composition ; black carbon ; concentration (composition) ; fog ; mass spectrometry ; particulate matter ; physicochemical property ; size distribution ; soot ; spectrometer ; wood ; California ; San Joaquin Valley ; United States
英文摘要: Inorganic and organic coatings on black carbon (BC) particles can enhance light absorption and affect atmospheric lifetimes of BC-containing particles and thus have significant implications for climate. To study the physical and chemical characteristics of atmospheric BC and BC-associated coatings, a soot particle-aerosol mass spectrometer was deployed during the winter of 2014–2015 in Fresno, a city located in the San Joaquin Valley of California, to selectively analyze BC-containing particles. Comparing soot particle-aerosol mass spectrometer measurements to those from the collocated single-particle soot photometer (SP2) and high-resolution aerosol mass spectrometer, we found that 17% of total submicrometer aerosol mass was associated with BC-containing particles, suggesting that a majority of the fine particles in Fresno contained no BC. Most BC-containing particles appeared to be associated with residential wood burning and vehicular traffic. These particles typically had a bulk-average mass ratio of coating to BC (Rcoat/rBC) less than 2. However, during periods of persistent fog larger Rcoat/rBC values were observed, with the coatings primarily composed of secondary inorganic and organic components that likely resulted from aqueous-phase processing. Specifically, compared to periods with less fog, the BC coating increased in concentration and contained a larger fraction of nitrate and oxidized organic matter. The size distributions of BC and associated organic coating were generally centered around 300 nm in vacuum aerodynamic diameter. However, during foggy periods BC had an additional peak at ~400 nm and organics and nitrate displayed a prominent mode in the accumulation size range. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113674
Appears in Collections:气候减缓与适应

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作者单位: Department of Environmental Toxicology, University of California, Davis, CA, United States; Now at California Air Resources Board, Sacramento, CA, United States; Aerodyne Research Inc., Billerica, MA, United States; Department of Civil and Environmental Engineering, University of California, Davis, CA, United States; Now at the Air Quality Research Center, University of California, Davis, CA, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States

Recommended Citation:
Collier S.,Williams L.R.,Onasch T.B.,et al. Influence of Emissions and Aqueous Processing on Particles Containing Black Carbon in a Polluted Urban Environment: Insights From a Soot Particle-Aerosol Mass Spectrometer[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(12)
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