DOI: 10.1016/j.atmosres.2018.03.011
Scopus记录号: 2-s2.0-85044615412
论文题名: Heavy aerosol pollution episodes in winter Beijing enhanced by radiative cooling effects of aerosols
作者: Zhong J. ; Zhang X. ; Wang Y. ; Liu C. ; Dong Y.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 209 起始页码: 59
结束页码: 64
语种: 英语
英文关键词: Aerosol pollution
; Anomalous inversion
; Positive feedback
; Radiative cooling effects
Scopus关键词: Aerosols
; Atmospheric radiation
; Cooling
; Feedback
; Anomalous inversion
; Heterogeneous reactions
; Hygroscopic growth
; Pollution episodes
; Radiative cooling
; Surface radiation
; Temperature differences
; Temperature profiles
; Air pollution
; aerosol
; atmospheric moisture
; atmospheric pollution
; cooling
; particulate matter
; solar radiation
; synoptic meteorology
; winter
; Beijing [Beijing (ADS)]
; Beijing [China]
; China
英文摘要: Heavy aerosol pollution episodes (HPEs) often occurred in winter Beijing, but precise causes of pollution-intensifying mechanisms are uncertain, particularly the feedback between aerosols and weather. Building on the surface and vertical observations in January 2013, February 2014, December 2015, and December 2016 to 10th January 2017, here we show aerosol's radiative cooling effects exert remarkable impacts on the local synoptic weather which further aggravates aerosol pollution. From clean stages to transport stages (TS) to cumulative stages (CS) in HPEs, surface direct and global radiation sharply diminish, with daily the cumulative sum of radiant exposure reduced by 89% and 56% respectively from clean stages to CSs. Due to the appreciably drop in surface radiation and favorable weak winds, from TSs to the earlier period in CSs to the later period, the temperature profile changes from nearly no inversion to a weak inversion to an anomalous inversion with the temperature difference over 4 °C from 200 to 600 m, which leads to PM2.5 and moisture accumulated in a very shallow BL with height ~200 m. Such a positive feedback is reinforced by high near-ground RH through accelerating liquid-phase and heterogeneous reactions and enhancing aerosol hygroscopic growth. © 2018 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108853
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: State Key Laboratory of Severe Weather, Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, China; Center for Excellence in Regional Atmospheric Environment, IUE, Chinese Academy of Sciences, China; Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, China
Recommended Citation:
Zhong J.,Zhang X.,Wang Y.,et al. Heavy aerosol pollution episodes in winter Beijing enhanced by radiative cooling effects of aerosols[J]. Atmospheric Research,2018-01-01,209