气候变化领域集成服务门户(CCPortal): Influence of Arctic Oscillation abnormalities on spatio-temporal haze distributions in China

CCPortal

DOI	10.1016/j.atmosenv.2020.117282
	Influence of Arctic Oscillation abnormalities on spatio-temporal haze distributions in China
	Lu S.; He J.; Gong S.; Zhang L.
发表日期	2020
ISSN	1352-2310
卷号	223
英文摘要	This study investigates the impact of Arctic Oscillation (AO) abnormalities on the haze days in China for 57 winters from 1961 to 2017. The results reveal that that AO abnormalities mainly affected meteorological conditions and haze pollution in northern and central China, while their impact on the southeast coastal and Guangdong-Guangxi regions is not significant. During years with an abnormally high AO index (AOI) in winter, the number of haze days increased in northern and central China, especially in the Shanxi–Shandong–Hebei–Beijing–Tianjin and Hubei–Hunan–Henan–Jiangxi regions, while the number of haze days decreased during years of abnormally low AOI. When in the years of abnormally high AOI, the weakening of the East Asian trough caused the decrease of the meridional circulation and the increase of zonal winds compared with normal years. Furthermore, the weakening of the Siberian high pressure and the enhancement of the westerly circulation affected several meteorological factors, including the boundary layer height, surface temperature, wind speeds, and precipitations. These changes effectively inhibited the development of low-level vertical motion and the vertical diffusion of pollutants in the air, leading to the accumulation of haze pollution. The situation was the opposite for low AOI years, but the impact on the meteorological conditions was relatively weak compared to that during high AOI years. The impacts of the regional characteristics of AO abnormalities on the haze days are also investigated in this study. © 2020 Elsevier Ltd
关键词	Arctic oscillation Composite analysis Correlation analysis Haze
语种	英语
scopus关键词	Boundary layer flow; Boundary layers; Arctic Oscillation; Boundary layer heights; Composite analysis; Correlation analysis; Haze; Meridional circulation; Meteorological condition; Regional characteristics; Pollution; Arctic Oscillation; boundary layer; composite; correlation; haze; meridional circulation; spatial distribution; spatiotemporal analysis; zonal wind; article; boundary layer; diffusion; Guangxi; haze; meteorology; motion; North Atlantic oscillation; pollutant; precipitation; wind speed; winter; Beijing [China]; China; Guangdong; Guangxi Zhuangzu; Guangxi Zhuangzu; Hebei; Henan; Hubei; Hunan; Jiangxi; Shandong; Shanxi; Tianjin
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/249354
作者单位	State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing, 100081, China
推荐引用方式 GB/T 7714	Lu S.,He J.,Gong S.,et al. Influence of Arctic Oscillation abnormalities on spatio-temporal haze distributions in China[J],2020,223.
APA	Lu S.,He J.,Gong S.,&Zhang L..(2020).Influence of Arctic Oscillation abnormalities on spatio-temporal haze distributions in China.ATMOSPHERIC ENVIRONMENT,223.
MLA	Lu S.,et al."Influence of Arctic Oscillation abnormalities on spatio-temporal haze distributions in China".ATMOSPHERIC ENVIRONMENT 223(2020).