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Impact of aerosol–meteorology interactions on fine particle pollution during China’s severe haze episode in January 2013
In January 2013, a severe regional haze occurred over the North China Plain. An online-coupled meteorology-chemistry model was employed to simulate the impacts of aerosol–meteorology interactions on fine particles (PM _2.5 ) pollution during this haze episode. The response of PM _2.5 to meteorology change constituted a feedback loop whereby planetary boundary layer (PBL) dynamics amplified the initial perturbation of PM _2.5 . High PM _2.5 concentrations caused a decrease of surface solar radiation. The maximal decrease in daily average solar radiation reached 53% in Beijing, thereby leading to a more stable PBL. The peak PBL height in Beijing decreased from 690 m to 590 m when the aerosol extinction was considered. Enhanced PBL stability suppressed the dispersion of air pollutants, and resulted in higher PM _2.5 concentrations. The maximal increase of PM _2.5 concentrations reached 140 μ g m ^−3 in Beijing. During most PM _2.5 episodes, primary and secondary particles increased simultaneously. These results imply that the aerosol–radiation interactions played an important role in the haze episode in January 2013.
Impact of aerosol–meteorology interactions on fine particle pollution during China’s severe haze episode in January 2013
In January 2013, a severe regional haze occurred over the North China Plain. An online-coupled meteorology-chemistry model was employed to simulate the impacts of aerosol–meteorology interactions on fine particles (PM _2.5 ) pollution during this haze episode. The response of PM _2.5 to meteorology change constituted a feedback loop whereby planetary boundary layer (PBL) dynamics amplified the initial perturbation of PM _2.5 . High PM _2.5 concentrations caused a decrease of surface solar radiation. The maximal decrease in daily average solar radiation reached 53% in Beijing, thereby leading to a more stable PBL. The peak PBL height in Beijing decreased from 690 m to 590 m when the aerosol extinction was considered. Enhanced PBL stability suppressed the dispersion of air pollutants, and resulted in higher PM _2.5 concentrations. The maximal increase of PM _2.5 concentrations reached 140 μ g m ^−3 in Beijing. During most PM _2.5 episodes, primary and secondary particles increased simultaneously. These results imply that the aerosol–radiation interactions played an important role in the haze episode in January 2013.
Impact of aerosol–meteorology interactions on fine particle pollution during China’s severe haze episode in January 2013
Jiandong Wang (author) / Shuxiao Wang (author) / Jingkun Jiang (author) / Aijun Ding (author) / Mei Zheng (author) / Bin Zhao (author) / David C Wong (author) / Wei Zhou (author) / Guangjie Zheng (author) / Long Wang (author)
2014
Article (Journal)
Electronic Resource
Unknown
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