Articles | Volume 19, issue 1
Atmos. Chem. Phys., 19, 565–576, 2019
https://doi.org/10.5194/acp-19-565-2019

Special issue: Regional transport and transformation of air pollution in...

Atmos. Chem. Phys., 19, 565–576, 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 et al.

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Latest update: 09 May 2021
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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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