Articles | Volume 17, issue 17
https://doi.org/10.5194/acp-17-10333-2017
https://doi.org/10.5194/acp-17-10333-2017
Research article
 | 
04 Sep 2017
Research article |  | 04 Sep 2017

Ageing and hygroscopicity variation of black carbon particles in Beijing measured by a quasi-atmospheric aerosol evolution study (QUALITY) chamber

Jianfei Peng, Min Hu, Song Guo, Zhuofei Du, Dongjie Shang, Jing Zheng, Jun Zheng, Limin Zeng, Min Shao, Yusheng Wu, Don Collins, and Renyi Zhang

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AR by Jianfei Peng on behalf of the Authors (17 Jul 2017)  Manuscript 
ED: Publish as is (25 Jul 2017) by Zhanqing Li
AR by Jianfei Peng on behalf of the Authors (27 Jul 2017)  Manuscript 
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Short summary
Rapid growth of BC particles was observed in Beijing using a new outdoor chamber, with an average growth rate of 26 ± 11 nm h−1. Secondary organic aerosol (SOA) accounted for more than 90 % of the coating mass. The hygroscopic growth factor of BC particles increased to 1.06–1.08 upon ageing. The κ (kappa) values for BC particles were calculated as only 0.035, indicating that initial photochemical ageing of BC particles does not appreciably alter the particle hygroscopicity in Beijing.
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