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DOI	10.5194/acp-19-8703-2019
	Aerosol-radiation feedback deteriorates the wintertime haze in the North China Plain
	Wu J.; Bei N.; Hu B.; Liu S.; Zhou M.; Wang Q.; Li X.; Liu L.; Feng T.; Liu Z.; Wang Y.; Cao J.; Tie X.; Wang J.; Molina L.T.; Li G.
发表日期	2019
ISSN	16807316
起始页码	8703
结束页码	8719
卷号	19 期号:13
英文摘要	Atmospheric aerosols scatter or absorb a fraction of the incoming solar radiation to cool or warm the atmosphere, decreasing surface temperature and altering atmospheric stability to further affect the dispersion of air pollutants in the planetary boundary layer (PBL). In the present study, simulations during a persistent and heavy haze pollution episode from 5 December 2015 to 4 January 2016 in the North China Plain (NCP) were performed using the Weather Research and Forecasting model with Chemistry (WRF-Chem) to comprehensively quantify contributions of aerosol shortwave radiative feedback (ARF) to near-surface (around 15m above the ground surface) PM2:5 mass concentrations. The WRF-Chem model generally performs well in simulating the temporal variations and spatial distributions of air pollutants concentrations compared to observations at ambient monitoring sites in the NCP, and the simulated diurnal variations of aerosol species are also consistent with the measurements in Beijing. Additionally, the model simulates the aerosol radiative properties, the downward shortwave flux, and the PBL height against observations in the NCP well. During the episode, ARF deteriorates the haze pollution, increasing the near-surface PM2:5 concentrations in the NCP by 10.2 μgm-3 or with a contribution of 7.8% on average. Sensitivity studies have revealed that high loadings of PM2:5 attenuate the incoming solar radiation reaching the surface to cool the low-level atmosphere, suppressing the development of the PBL, decreasing the surface wind speed, further hindering the PM2:5 dispersion, and consequently exacerbating the haze pollution in the NCP. Furthermore, when the near-surface PM2:5 mass concentration increases from around 50 to several hundred μgm-3, ARF contributes to the near-surface PM2:5 by more than 20% during daytime in the NCP, substantially aggravating the heavy haze formation. However, when the near-surface PM2:5 concentration is less than around 50 μgm-3, ARF generally reduces the nearsurface PM2:5 concentration due to the consequent perturbation of atmospheric dynamic fields. © Author(s) 2019.
语种	英语
scopus关键词	aerosol formation; atmospheric pollution; boundary layer; concentration (composition); haze; particulate matter; shortwave radiation; winter; Beijing [China]; China; North China Plain
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144296
作者单位	Key Lab of Aerosol Chemistry and Physics, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, Shaanxi, 710061, China; School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, Shaanxi, 710061, China; Department of Chemical and Biochemical Engineering, Interdisciplinary Graduate Program in Geo-Informatics, University of Iowa, Iowa City, IA 52242, United States; Molina Center for Energy and the Environment, San Diego, CA 92037, United States; University of Chinese Academy of Science, Beijing, 100049, China
推荐引用方式 GB/T 7714	Wu J.,Bei N.,Hu B.,et al. Aerosol-radiation feedback deteriorates the wintertime haze in the North China Plain[J],2019,19(13).
APA	Wu J..,Bei N..,Hu B..,Liu S..,Zhou M..,...&Li G..(2019).Aerosol-radiation feedback deteriorates the wintertime haze in the North China Plain.Atmospheric Chemistry and Physics,19(13).
MLA	Wu J.,et al."Aerosol-radiation feedback deteriorates the wintertime haze in the North China Plain".Atmospheric Chemistry and Physics 19.13(2019).