气候变化领域集成服务门户(CCPortal): Associations between winter atmospheric teleconnections in drought and haze pollution over Southwest China

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DOI	10.1016/j.scitotenv.2020.142599
	Associations between winter atmospheric teleconnections in drought and haze pollution over Southwest China
	Hu, Yuling; Wang, Shigong
通讯作者	Wang, SG (通讯作者)，Chengdu Univ Informat Technol, Coll Atmospher Sci, Plateau Atmosphere & Environm Key Lab Sichuan Pro, Chengdu 610225, Peoples R China.
发表日期	2021
ISSN	0048-9697
EISSN	1879-1026
卷号	766
英文摘要	In the early 21st century, Southwest China (SWC) frequently experienced extreme droughts and severe haze pollution events. Although the meteorological causes of these extreme droughts have been widely investigated, previous studies have yet to understand the causes of haze pollution events over SWC. Moreover, the associations between winter atmospheric teleconnections during drought and haze pollution event across SWC has received negligible attention and therefore warrants investigation. This study examines the associations between the atmospheric teleconnections with respect to winter droughts and winter haze pollution over SWC. Our main conclusions are as follows. (1) Winter precipitation and winter haze days (WHD) over SWC had three major fluctuations from 1959 to 2016. (2) The atmospheric circulation pattern over the Eurasian (EU) continent associated with WHD over SWC resembled that of winter droughts over SWC, where both can be characterized by an EU teleconnection pattern. The Arctic Oscillation (AO) mainly induced the atmospheric circulation pattern over the EU continent that is associated with WHD over SWC. (3) The sea surface temperature (SST) and low circulation anomalies in the Pacific and north Atlantic associated with WHD were similar to those associated with winter droughts over SWC. La Nina events and negative phases of the North Atlantic Oscillation (NAO) may induce winter drought and increase the WHD over SWC. (4) Compared with winter drought over SWC, the variation in the WHD was more complex and the factors affecting WHD were more diverse, and winter drought and its related atmospheric circulations were important factors that induced haze pollution over SWC. Overall, this study not only fills a gap in the literature with respect to the associations between the atmospheric teleconnections of winter drought and winter haze pollution over SWC, but also provides an important scientific basis for the development of potential predictions of local monthly haze pollution, which improves the forecast accuracy of local short-term haze pollution and enriches the theoretical understanding of the meteorological causes of local haze pollution. (C) 2020 Elsevier B.V. All rights reserved.
关键词	YANGTZE-RIVER DELTA SICHUAN BASIN NORTH CHINA VISIBILITY PM2.5 TRANSPORT EPISODE REGION IMPACT PM10
英文关键词	Haze pollution; Drought; Precipitation; Southwest China; Atmospheric circulation
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000617676800029
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/255010
作者单位	[Hu, Yuling] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China; [Wang, Shigong] Chengdu Univ Informat Technol, Coll Atmospher Sci, Plateau Atmosphere & Environm Key Lab Sichuan Pro, Chengdu 610225, Peoples R China; [Wang, Shigong] Lanzhou Univ, Coll Atmospher Sci, Key Lab Arid Climate Change & Reducing Disaster G, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Hu, Yuling,Wang, Shigong. Associations between winter atmospheric teleconnections in drought and haze pollution over Southwest China[J]. 中国科学院西北生态环境资源研究院,2021,766.
APA	Hu, Yuling,&Wang, Shigong.(2021).Associations between winter atmospheric teleconnections in drought and haze pollution over Southwest China.SCIENCE OF THE TOTAL ENVIRONMENT,766.
MLA	Hu, Yuling,et al."Associations between winter atmospheric teleconnections in drought and haze pollution over Southwest China".SCIENCE OF THE TOTAL ENVIRONMENT 766(2021).