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DOI	10.1029/2020JD034035
	Three-Dimensional Distribution of PM2.5 over the Yangtze River Delta as Cold Fronts Moving Through
	Kang H.; Zhu B.; Liu X.; Shi S.; Hou X.; Lu W.; Yan S.; Pan C.; Chen Y.
发表日期	2021
ISSN	2169897X
卷号	126 期号:8
英文摘要	Long-range transport of PM2.5 from the North China Plain (NCP) by cold frontal passage is considered to be an important haze formation mechanism in the Yangtze River Delta (YRD). However, detailed 3D distributions of PM2.5 and meteorological fields during the front moving through are not fully understood. Herein, in situ observations showed that most haze events in autumn and winter in the YRD were associated with cold frontal passages. A typical cold front episode on November 2–3, 2017, was investigated with unmanned aerial vehicle sounding and model simulations, which both revealed that PM2.5 in the upper air (∼1.0 km) reached the YRD earlier than that moving at the ground level. When the cold front reached the NCP, air pollutants ahead of the front was lifted from the ground level to the upper air. Subsequently, increased PM2.5 concentrations and higher wind speed in the upper air resulted in stronger PM2.5 outflow from the NCP to YRD compared to that at ground level. The maximum PM2.5 mass contribution from the NCP to YRD was 15.6 μg m−3 (accounted for 31.5% of the total PM2.5 in the YRD), which appeared at ∼1.0 km altitude. Compared to the noncold front period, the PM2.5 mass transported from the NCP was 10–15 times higher during the cold front episode. Results indicate that the combination of multisite sounding and elaborate simulation can effectively explain the impact of synoptic processes on the transport, distribution, and evolution of air pollution and provide precise pollution control directives. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	cold front; contribution; three-dimensional structure; Yangtze River Delta
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185291
作者单位	Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Key Laboratory of Meteorological Disaster, Ministry of Education (KLME), Joint International Research Laboratory of Climate and Environment Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, China; Chongqing Institute of Meteorological Sciences, Chongqing, China; Jiangsu Meteorological Observatory, Nanjing, China; Key Laboratory of Transportation Meteorology, China Meteorological Administration (LATM-CMA), Nanjing, China; Public Meteorological Service Center, China Meteorological Administration, Beijing, China
推荐引用方式 GB/T 7714	Kang H.,Zhu B.,Liu X.,et al. Three-Dimensional Distribution of PM2.5 over the Yangtze River Delta as Cold Fronts Moving Through[J],2021,126(8).
APA	Kang H..,Zhu B..,Liu X..,Shi S..,Hou X..,...&Chen Y..(2021).Three-Dimensional Distribution of PM2.5 over the Yangtze River Delta as Cold Fronts Moving Through.Journal of Geophysical Research: Atmospheres,126(8).
MLA	Kang H.,et al."Three-Dimensional Distribution of PM2.5 over the Yangtze River Delta as Cold Fronts Moving Through".Journal of Geophysical Research: Atmospheres 126.8(2021).