干旱区生态环境知识资源中心(Arid): Decreasing atmospheric visibility associated with weakening winds from 1980 to 2017 over China

Arid

DOI	10.1016/j.atmosenv.2020.117314
	Decreasing atmospheric visibility associated with weakening winds from 1980 to 2017 over China
	Zhang, Yong 1; Gao, Lina 1; Cao, Lijuan 2; Yan, Zhongwei 3; Wu, Yongxue 4
通讯作者	Gao, Lina ; Cao, Lijuan
来源期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
EISSN	1873-2844
出版年	2020
卷号	224
英文摘要	This paper presents the climatology and changes in atmospheric visibility (AV) in China during 1980-2017 based on adjusted data from an extended station network. The relationships between AV and the wind speed (WS) from the near surface to the troposphere (850 hPa to 200 hPa) are analysed. The mean visibility at 582 qualified stations in China is 22.03 km, with the highest in summer (25.37 km) and lowest in winter (18.92 km). The annual mean AV has decreased at most stations and all seasons across China since the 1980s. Most regions show a decreasing AV trend mainly before 2005 and an increasing trend in recent years, possibly related to the emission reduction policies in China. The AV has a significant positive correlation with the near-surface WS in all seasons, with the largest correlation coefficient of 0.84 in summer and the smallest in winter. The AV also has a positive correlation with the WS in the lower troposphere in most of China, except in some inland desert regions. Additionally, the long-term trends of WS, surface temperature (T), relative humidity (RH) and surface pressure (Ps) were analysed at each station across China. The results show that both decreasing WS and increasing T could well account for the decreasing trend in AV. The changes in RH and Ps are at least not the main drivers. Overall, the best (worst) visibility corresponds to the largest (smallest) WS near the ground and in the lower troposphere, but such correspondence tends to overturn towards the upper troposphere.
英文关键词	Atmospheric visibility Radiosonde wind profile Wind speed Observation data adjustment
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000525865300026
WOS关键词	HAZE POLLUTION ; HOMOGENEITY TEST ; EASTERN CHINA ; URBAN AREA ; TRENDS ; TRANSPORT ; IMPACT ; AEROSOL ; TAIWAN ; SPEED
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314148
作者单位	1.China Meteorol Adm, Meteorol Observat Ctr, Beijing 100081, Peoples R China; 2.China Meteorol Adm, Natl Meteorol Informat Ctr, Beijing 100081, Peoples R China; 3.Univ Chinese Acad Sci, Inst Atmospher Phys, Key Lab Reg Climate Environm East Asia, Beijing 100029, Peoples R China; 4.Yanqing Dist Meteorol, Beijing 102100, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yong,Gao, Lina,Cao, Lijuan,et al. Decreasing atmospheric visibility associated with weakening winds from 1980 to 2017 over China[J],2020,224.
APA	Zhang, Yong,Gao, Lina,Cao, Lijuan,Yan, Zhongwei,&Wu, Yongxue.(2020).Decreasing atmospheric visibility associated with weakening winds from 1980 to 2017 over China.ATMOSPHERIC ENVIRONMENT,224.
MLA	Zhang, Yong,et al."Decreasing atmospheric visibility associated with weakening winds from 1980 to 2017 over China".ATMOSPHERIC ENVIRONMENT 224(2020).