Articles | Volume 23, issue 12
https://doi.org/10.5194/acp-23-7225-2023
https://doi.org/10.5194/acp-23-7225-2023
Research article
 | 
30 Jun 2023
Research article |  | 30 Jun 2023

Vertical distribution of black carbon and its mixing state in the urban boundary layer in summer

Hang Liu, Xiaole Pan, Shandong Lei, Yuting Zhang, Aodong Du, Weijie Yao, Guiqian Tang, Tao Wang, Jinyuan Xin, Jie Li, Yele Sun, Junji Cao, and Zifa Wang

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Cited articles

Bond, T. C. and Bergstrom, R. W.: Light absorption by carbonaceous particles: An investigative review, Aerosol Sci. Tech., 40, 27–67, https://doi.org/10.1080/02786820500421521, 2006. 
Bond, T. C., Doherty, S. J., Fahey, D., Forster, P., Berntsen, T., DeAngelo, B., Flanner, M., Ghan, S., Kärcher, B., and Koch, D.: Bounding the role of black carbon in the climate system: A scientific assessment, J. Geophys. Res.-Atmos., 118, 5380–5552, 2013. 
Cook, J. and Highwood, E. J.: Climate response to tropospheric absorbing aerosols in an intermediate general-circulation model, Q. J. Roy. Meteor. Soc., 130, 175–191, https://doi.org/10.1256/qj.03.64, 2004. 
Ding, S., Liu, D. T., Zhao, D. L., Hu, K., Tian, P., Zhou, W., Huang, M. Y., Yang, Y., Wang, F., Sheng, J. J., Liu, Q., Kong, S. F., Cui, P. Y., Huang, Y. D., He, H., Coe, H., and Ding, D. P.: Size-Related Physical Properties of Black Carbon in the Lower Atmosphere over Beijing and Europe, Environ. Sci. Technol., 53, 11112–11121, https://doi.org/10.1021/acs.est.9b03722, 2019. 
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Short summary
We provide the average vertical profiles of black carbon (BC) concentration, size distribution and coating thickness at different times of the day in an urban area based on 112 vertical profiles. In addition, it is found that BC in the residual layer generally has a thicker coating, higher absorption enhancement and hygroscopicity than on the surface. Such aged BC could enter into the boundary layer and influence the BC properties in the early morning.
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