气候变化领域集成服务门户(CCPortal): Investigation on the difference of PM2.5 transport flux between the North China Plain and the Sichuan Basin

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DOI	10.1016/j.atmosenv.2021.118922
	Investigation on the difference of PM2.5 transport flux between the North China Plain and the Sichuan Basin
	Zhang Z.; Wang X.; Cheng S.; Guan P.; Zhang H.; Shan C.; Fu Y.
发表日期	2022
ISSN	1352-2310
卷号	271
英文摘要	In this study, an advanced transport flux method based on the comprehensive stereoscopic observation verification was used to evaluate the contribution of transport to pollution in the North China Plain (NCP) and Sichuan Basin (SCB). The simulations were verified using fixed-point lidar and satellite observations, and the results demonstrated that the modeling flux calculation method was suitable for investigating the evolutionary trend of PM2.5 flux. The monthly inflow, outflow, and net flux indicated the intensive interactions and significant temporal and spatial variations of PM2.5 transport though the boundary segment of the city and region. In both autumn and winter, the Beijing-Tianjin-Hebei (BTH) region always played the role of “source” region, while Cheng-Yu (CY) region principally acted as a “convergence” region. In autumn and winter, the BTH region was controlled by a cold front weather system, and the pollutants were readily transported to the surrounding areas. However, the CY region was affected by the complex terrain, with small wind speeds near the ground and poor horizontal diffusion. The upper air was controlled by the northwestern winds behind the trough, and the air subsidence is substantial. The combined action of horizontal and vertical wind directions caused the accumulation of pollutants in the basin. Notably, one intrinsic transport pathway during two representative months was identified based on the investigation of cross-city and cross-region transport, namely the southwest–northeast (SW–NE) pathway in the BTH region. In the CY region, the northeastern transport pathway greatly influenced the cities in the basin. Additionally, through the analysis of the typical heavy pollution processes in the two regions, it was found that the southwest pathway of the BTH region and northeast pathway of the CY region in inter-city transport were significant factors before reaching the most severe stage of pollution. © 2021 Elsevier Ltd
关键词	Haze episodes PM2.5 flux The North China Plain The Sichuan Basin Transport pathway WRF-CAMx
语种	英语
scopus关键词	Stereo image processing; Beijing-tianjin-hebei regions; Haze episode; PM 2.5; PM2.5 flux; The north china plain; The sichuan basin; Transport pathways; WRF-CAMx; Haze polution; atmospheric pollution; cold front; particulate matter; seasonal variation; spatiotemporal analysis; article; autumn; calculation; China; city; cold stress; diffusion; haze; net flux; particulate matter 2.5; simulation; wind speed; winter; China
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248082
作者单位	Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing, 100124, China; School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China; State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, 100048, China; Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing, 100048, China; Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, China
推荐引用方式 GB/T 7714	Zhang Z.,Wang X.,Cheng S.,et al. Investigation on the difference of PM2.5 transport flux between the North China Plain and the Sichuan Basin[J],2022,271.
APA	Zhang Z..,Wang X..,Cheng S..,Guan P..,Zhang H..,...&Fu Y..(2022).Investigation on the difference of PM2.5 transport flux between the North China Plain and the Sichuan Basin.ATMOSPHERIC ENVIRONMENT,271.
MLA	Zhang Z.,et al."Investigation on the difference of PM2.5 transport flux between the North China Plain and the Sichuan Basin".ATMOSPHERIC ENVIRONMENT 271(2022).