气候变化领域集成服务门户(CCPortal): Increased Aerosol Extinction Efficiency Hinders Visibility Improvement in Eastern China

CCPortal

DOI	10.1029/2020GL090167
	Increased Aerosol Extinction Efficiency Hinders Visibility Improvement in Eastern China
	Liu J.; Ren C.; Huang X.; Nie W.; Wang J.; Sun P.; Chi X.; Ding A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	Though China has witnessed substantial particular matter pollution mitigation owing to the strict emission control in recent years, the frequency of haze events with low visibility is not improved as much as expected, especially in cold seasons. Here, 6-year wintertime observations, satellite retrievals, a thermodynamic model, and theoretical calculation were integrated to better understand the complex influence of aerosol chemical composition and hygroscopic behaviors on visibility impairment. We found that the proportion of nitrate in aerosol mass concentration increased by approximately 10% from 2013 to 2018. Such a transition in aerosol chemical compositions together with increasing ambient humidity in past years jointly enhanced aerosol extinction efficiency, and the elevated proportion of nitrate played an increasingly critical role after 2017. The increased aerosol extinction efficiency is responsible for the less improved visibility despite large decrease in aerosol mass concentrations in eastern China. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Aerosols; Efficiency; Emission control; Nitrates; Visibility; Aerosol chemical composition; Aerosol mass concentration; Hygroscopic behavior; Pollution mitigation; Satellite retrieval; Theoretical calculations; Visibility impairment; Visibility improvement; Light extinction; aerosol; chemical composition; complexity; emission control; haze; hygroscopicity; integrated approach; particulate matter; satellite data; visibility; China
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169580
作者单位	School of Atmospheric Sciences, Nanjing University, Nanjing, China; Jiangsu Provincial Collaborative Innovation Center for Climate Change, Nanjing, China
推荐引用方式 GB/T 7714	Liu J.,Ren C.,Huang X.,et al. Increased Aerosol Extinction Efficiency Hinders Visibility Improvement in Eastern China[J],2020,47(20).
APA	Liu J..,Ren C..,Huang X..,Nie W..,Wang J..,...&Ding A..(2020).Increased Aerosol Extinction Efficiency Hinders Visibility Improvement in Eastern China.Geophysical Research Letters,47(20).
MLA	Liu J.,et al."Increased Aerosol Extinction Efficiency Hinders Visibility Improvement in Eastern China".Geophysical Research Letters 47.20(2020).