Articles | Volume 18, issue 14
https://doi.org/10.5194/acp-18-10741-2018
https://doi.org/10.5194/acp-18-10741-2018
Research article
 | 
27 Jul 2018
Research article |  | 27 Jul 2018

Molecular distributions of dicarboxylic acids, oxocarboxylic acids and α-dicarbonyls in PM2.5 collected at the top of Mt. Tai, North China, during the wheat burning season of 2014

Yanhong Zhu, Lingxiao Yang, Jianmin Chen, Kimitaka Kawamura, Mamiko Sato, Andreas Tilgner, Dominik van Pinxteren, Ying Chen, Likun Xue, Xinfeng Wang, Isobel J. Simpson, Hartmut Herrmann, Donald R. Blake, and Wenxing Wang

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Subject: Aerosols | Research Activity: Field Measurements | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Cited articles

Aggarwal, S. G. and Kawamura, K.: Molecular distributions and stable carbon isotopic compositions of dicarboxylic acids and related compounds in aerosols from Sapporo, Japan: Implications for photochemical aging during long-range atmospheric transport, J. Geophys. Res.-Atmos., 113, D14301, https://doi.org/10.1029/2007JD009365, 2008. 
Almeida, S. M., Pio, C. A., Freitas, M. C., Reis, M. A., and Trancoso, M. A.: Source apportionment of fine and coarse particulate matter in a sub-urban area at the Western European Coast, Atmos. Environ., 39, 3127–3138, https://doi.org/10.1016/j.atmosenv.2005.01.048, 2005. 
Bikkina, S., Kawamura, K., Miyazaki, Y., and Fu, P.: High abundances of oxalic, azelaic, and glyoxylic acids andmethylglyoxal in the open oceanwith high biological activity: implication for secondary OA formation from isoprene, Geophys. Res. Lett., 41, 3649–3657, https://doi.org/10.1002/2014GL059913, 2014. 
Blake, D., Smith, T., Chen, T. Y., Whipple, W., and Rowland, F.: Effects of biomass burning on summertime nonmethane hydrocarbon concentrations in the Canadian wetlands, J. Geophys. Res.-Atmos., 99, 1699–1719, https://doi.org/10.1029/93JD02598, 1994. 
Boreddy, S. K. R., Kawamura, K., and Tachibana, E.: Long-term (2001–2013) observations of water-soluble dicarboxylic acids and related compounds over the western North Pacific: trends, seasonality and source apportionment, Sci. Rep.-UK, 7, 8518, https://doi.org/10.1038/s41598-017-08745-w, 2017. 
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Short summary
Molecular distributions of dicarboxylic acids, oxocarboxylic acids and α-dicarbonyls in the free troposphere are identified, and their concentration variations between 2014 and 2006 are presented. High nighttime concentrations were probably due to precursor emissions and aqueous-phase oxidation. Biomass burning was significant, but its tracer levoglucosan in 2014 was 5 times lower than 2006 concentrations. Finally, regional emission from anthropogenic activities was identified as a major source.
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