Articles | Volume 19, issue 1
https://doi.org/10.5194/acp-19-565-2019
https://doi.org/10.5194/acp-19-565-2019
Research article
 | 
15 Jan 2019
Research article |  | 15 Jan 2019

Seesaw haze pollution in North China modulated by the sub-seasonal variability of atmospheric circulation

Ge Zhang, Yang Gao, Wenju Cai, L. Ruby Leung, Shuxiao Wang, Bin Zhao, Minghuai Wang, Huayao Shan, Xiaohong Yao, and Huiwang Gao

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Latest update: 21 Feb 2024
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Short summary
Based on observed data, this study reveals a distinct seesaw feature of abnormally high and low PM2.5 concentrations in December 2015 and January 2016 over North China. The mechanism of the seesaw pattern was found to be linked to a super El Niño and the Arctic Oscillation (AO). During the mature phase of El Niño in December 2015, the weakened East Asian winter monsoon favors strong haze formation; however, the circulation pattern was reversed in the next month due to the phase change of the AO.
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