干旱区生态环境知识资源中心(Arid): Characteristics of daily extreme wind gusts on the Qinghai-Tibet Plateau, China

Arid

	Characteristics of daily extreme wind gusts on the Qinghai-Tibet Plateau, China
	Yao Zhengyi; Li Xiaoying; Xiao Jianhua
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2018
卷号	10 期号:5 页码:673-685
英文摘要	Severe wind is a major natural hazard and a main driver of desertification on the Qinghai-Tibet Plateau. Generally, studies of Qinghai-Tibet Plateau's wind climatology focus on mean wind speeds and its gust speeds have been seldom investigated. Here, we used observed daily maximum gust speeds from a 95-station network over a 5-year period (2008-2012) to analyze the characteristics of extreme wind speeds and directions by fitting Weibull and Gumbel distributions. The results indicated the spatial distribution of extreme wind speeds and their direction on the Qinghai-Tibet Plateau is highly variable, with its western portion prone to greater mean speeds of extreme wind gusts than its eastern portion. Maximum extreme wind speeds of 30.9, 33.0, and 32.2 m/s were recorded at three stations along the Qinghai Tibet Railway. Severe winds occurred mostly from November to April, caused primarily by the westerly jet stream. Terrain greatly enhances the wind speeds. Our spatial analysis of wind speed data showed that the wind speeds increased exponentially with an increasing altitude. We also assessed the local wind hazard by calculating the return periods of maximum wind gusts from the observational data based on the statistical extreme value distributions of these wind speeds. Further attention should be given to those stations where the yearly maximum daily extreme wind speed increased at a rate greater than that of mean value of daily extreme wind speeds. Severe extreme wind events in these regions of the plateau are likely to become more frequent. Consequently, building structural designers working in these areas should use updated extreme wind data rather than relying on past data alone.
英文关键词	extreme wind gusts wind direction wind hazard wind speeds Qinghai-Tibet Plateau
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:6353569
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336020
作者单位	Yao Zhengyi, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Li Xiaoying, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Xiao Jianhua, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences;;Gansu Center for Sand Hazard Reduction Engineering and Technology, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences;;, Lanzhou;;Lanzhou, ;; 730000;;730000.
推荐引用方式 GB/T 7714	Yao Zhengyi,Li Xiaoying,Xiao Jianhua. Characteristics of daily extreme wind gusts on the Qinghai-Tibet Plateau, China[J],2018,10(5):673-685.
APA	Yao Zhengyi,Li Xiaoying,&Xiao Jianhua.(2018).Characteristics of daily extreme wind gusts on the Qinghai-Tibet Plateau, China.Journal of Arid Land,10(5),673-685.
MLA	Yao Zhengyi,et al."Characteristics of daily extreme wind gusts on the Qinghai-Tibet Plateau, China".Journal of Arid Land 10.5(2018):673-685.