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  Ambient measurement of fluorescent aerosol particles with a WIBS in the Yangtze River Delta of China: potential impacts of combustion-related aerosol particles

Yu, X., Wang, Z., Zhang, M., Kuhn, U., Xie, Z., Cheng, Y., et al. (2016). Ambient measurement of fluorescent aerosol particles with a WIBS in the Yangtze River Delta of China: potential impacts of combustion-related aerosol particles. Atmospheric Chemistry and Physics, 16(17), 11337-11348. doi:10.5194/acp-16-11337-2016.

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Yu, X.1, Author              
Wang, Z.1, Author              
Zhang, M.1, Author              
Kuhn, U.1, Author              
Xie, Zhouqing2, Author
Cheng, Y.1, Author              
Pöschl, U.1, Author              
Su, H.1, Author              
Affiliations:
1Multiphase Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826290              
2external, ou_persistent22              

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 Abstract: Fluorescence characteristics of aerosol particles in a polluted atmosphere were studied using a wideband integrated bioaerosol spectrometer (WIBS-4A) in Nanjing, Yangtze River Delta area of China. We observed strong diurnal and day-to-day variations of fluorescent aerosol particles (FAPs). The average number concentrations of FAPs (1-15 mu m) detected in the three WIBS measurement channels (FL1: 0.6 cm(-3), FL2: 3.4 cm(-3), FL3: 2.1 cm(-3)) were much higher than those observed in forests and rural areas, suggesting that FAPs other than bioaerosols were detected. We found that the number fractions of FAPs were positively correlated with the black carbon mass fraction, especially for the FL1 channel, indicating a large contribution of combustion-related aerosols. To distinguish bioaerosols from combustion-related FAPs, we investigated two classification schemes for use with WIBS data. Our analysis suggests a strong size dependence for the fractional contributions of different types of FAPs. In the FL3 channel, combustion-related particles seem to dominate the 1-2 mu m size range while bioaerosols dominate the 2-5 mu m range. The number fractions of combustion-related particles and non-combustion-related particles to total aerosol particles were similar to 11 and similar to 5%, respectively.

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 Dates: 2016
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: ISI: 000384251200003
DOI: 10.5194/acp-16-11337-2016
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Title: Atmospheric Chemistry and Physics
Source Genre: Journal
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Publ. Info: Katlenburg-Lindau, Germany : European Geosciences Union
Pages: - Volume / Issue: 16 (17) Sequence Number: - Start / End Page: 11337 - 11348 Identifier: ISSN: 1680-7316
CoNE: https://pure.mpg.de/cone/journals/resource/111030403014016