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Rapid formation and evolution of an extreme haze episode in Northern China during winter 2015

Open access
Sun, Yele, Chen, Chen, Zhang, Yingjie, Xu, Weiqi, Zhou, Libo, Cheng, Xueling, Zheng, Haitao, Ji, Dongsheng, Li, Jie, Tang, Xiao, Fu, Pingqing, Wang, Zifa·2016·Scientific Reports

Abstract

We investigate the rapid formation and evolutionary mechanisms of an extremely severe and persistent haze episode that occurred in northern China during winter 2015 using comprehensive ground and vertical measurements, along with receptor and dispersion model analysis. Our results indicate that the life cycle of a severe winter haze episode typically consists of four stages: (1) rapid formation initiated by sudden changes in meteorological parameters and synchronous increases in most aerosol species, (2) persistent evolution with relatively constant variations in secondary inorganic aerosols and secondary organic aerosols, (3) further evolution associated with fog processing and significantly enhanced sulfate levels and (4) clearing due to dry, cold north-northwesterly winds. Aerosol composition showed substantial changes during the formation and evolution of the haze episode but was generally dominated by regional secondary aerosols (53–67%). Our results demonstrate the important role of regional transport, largely from the southwest but also from the east and of coal combustion emissions for winter haze formation in Beijing. Also, we observed an important downward mixing pathway during the severe haze in 2015 that can lead to rapid increases in certain aerosol species.

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Metadata

Authors
Sun, Y., Chen, C., Zhang, Y., Xu, W., Zhou, L., Cheng, X., Zheng, H., Ji, D., Li, J., Tang, X., Fu, P., & Wang, Z.
Venue
Scientific Reports
Published
2016-05-31
Volume
6
Issue
1
Pages
27151-27151
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2435368322
Cited by
273
References
2
FWCI
19.32
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Rapid formation and evolution of an extreme haze episode in Northern China during winter 2015. https://app.cochat.ai/papers/10.1038/srep27151
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Sun, Y., Chen, C., Zhang, Y., Xu, W., Zhou, L., Cheng, X., Zheng, H., Ji, D., Li, J., Tang, X., Fu, P., & Wang, Z. (2016). Rapid formation and evolution of an extreme haze episode in Northern China during winter 2015. Scientific Reports. https://doi.org/10.1038/srep27151

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