Articles | Volume 25, issue 2
https://doi.org/10.5194/acp-25-1273-2025
https://doi.org/10.5194/acp-25-1273-2025
Research article
 | 
29 Jan 2025
Research article |  | 29 Jan 2025

Quasi-weekly oscillation of regional PM2.5 transport over China driven by the synoptic-scale disturbance of the East Asian winter monsoon circulation

Yongqing Bai, Tianliang Zhao, Kai Meng, Yue Zhou, Jie Xiong, Xiaoyun Sun, Lijuan Shen, Yanyu Yue, Yan Zhu, Weiyang Hu, and Jingyan Yao

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Cited articles

An, X., Chen, W., Hu, P., Chen, S., and Sheng, L.: Intraseasonal variation of the northeast Asian anomalous anticyclone and its impacts on PM2.5 pollution in the North China Plain in early winter, Atmos. Chem. Phys., 22, 6507–6521, https://doi.org/10.5194/acp-22-6507-2022, 2022. 
An, Z., Huang, R., Zhang, R., Tie, X., Li, G., Cao, J., Zhou, W., Shi, Z., Han, Y., Gu, Z., and Ji, Y.: Severe haze in northern China: A synergy of anthropogenic emissions and atmospheric processes, P. Natl. Acad. Sci. USA, 116, 8657–8666, https://doi.org/10.1073/pnas.1900125116, 2019. 
Bai, Y., Zhao, T., Zhou, Y., Kong, S., Hu, W., Xiong, J., Liu, L., Zheng, H., and Meng, K.: Aggravation effect of regional transport on wintertime PM2.5 over the middle reaches of the Yangtze River under China's air pollutant emission reduction process, Atmos. Pollut. Res., 12, 101111, https://doi.org/10.1016/j.apr.2021.101111, 2021. 
Bai, Y., Zhao, T., Hu, W., Zhou, Y., Xiong, J., Wang, Y., Liu, L., Shen, L., Kong, S., Meng, K., and Zheng, H.: Meteorological mechanism of regional PM2.5 transport building a receptor region for heavy air pollution over Central China, Sci. Total Environ., 808, 151951, https://doi.org/10.1016/j.scitotenv.2021.151951, 2022. 
Bäumer, D. and Vogel, B.: An unexpected pattern of distinct weekly periodicities in climatological variables in Germany, Geophys. Res. Lett., 34, L03819, https://doi.org/10.1029/2006gl028559, 2007. 
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Short summary
We proposed a composite statistical method to identify the quasi-weekly oscillation (QWO) of regional PM2.5 transport over China in winter from 2015 to 2019. The QWO of regional PM2.5 transport is constrained by synoptic-scale disturbances of the East Asian winter monsoon circulation with the periodic activities of the Siberian high, providing a new insight into the understanding of regional pollutant transport with meteorological drivers in atmospheric environment changes.
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