干旱区生态环境知识资源中心(Arid): Spatial and Temporal Variation of the Near-Surface Wind Environment in the Sahara Desert, North Africa

Arid

DOI	10.3389/feart.2021.789800
	Spatial and Temporal Variation of the Near-Surface Wind Environment in the Sahara Desert, North Africa
	Shi, Weikang; Dong, Zhibao; Chen, Guoxiang; Bai, Ziyi; Ma, Fang
通讯作者	Dong, ZB (corresponding author)，Shaanxi Normal Univ, Sch Geog & Tourism, Xian, Peoples R China.
来源期刊	FRONTIERS IN EARTH SCIENCE
EISSN	2296-6463
出版年	2022
卷号	9
英文摘要	The Sahara Desert is the largest source of dust on Earth, and has a significant impact on global atmospheric changes. Wind is the main dynamic factor controlling the transport and intensity of dust in the Sahara Desert. This study comprehensively analyzed the spatial and temporal variation in the wind regime of the Sahara Desert from 1980 to 2019 using data from 17 meteorological stations to improve awareness of global atmospheric changes and the intensity of regional aeolian activities. All wind speed parameters decreased from northwest to southeast. While there were significant differences in the trends of temporal variation in wind speed among the different regions, there was an overall decreasing trend across the Sahara Desert, with an average wind speed of 0.09 m s(-1) 10 a(-1). This decrease was closely related to wind frequency. The easterly, westerly, and northerly winds dominated, with more complex wind direction in the northern region. Seasonal differences in wind direction were observed in all regions. The wind direction frequency of wind speeds >6 m s(-1) exceeded those with wind speeds <6 m s(-1) in the western and northern regions, whereas other regions showed an opposite pattern. The highest drift potential (DP) and resultant drift potential (RDP) were found in the western and northern regions, and during spring and winter. There was a trend of decreasing annual variation in DP and RDP in all regions. The directional variability (RDP/DP) indicated mostly intermediate and high variability in wind direction. Resultant drift direction (RDD) indicated that a mainly southwest wind direction. No apparent trends in temporal variation in RDD and RDP/DP were observed. Total DP was strongly influenced by DP and the magnitude and frequency of strong winds in the prevailing wind direction. No strong correlation between wind regimes and dune types was observed in this desert, indicating the complexity of factors affecting dune morphology.
英文关键词	wind environment variation dune type Sahara Desert North Africa
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000749778000001
WOS关键词	WESTERN DESERT ; DUST TRANSPORT ; CLIMATE-CHANGE ; DUNES ; CHINA ; SPEED ; GEOMORPHOLOGY ; MAP
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376558
作者单位	[Shi, Weikang; Dong, Zhibao; Chen, Guoxiang; Bai, Ziyi; Ma, Fang] Shaanxi Normal Univ, Sch Geog & Tourism, Xian, Peoples R China
推荐引用方式 GB/T 7714	Shi, Weikang,Dong, Zhibao,Chen, Guoxiang,et al. Spatial and Temporal Variation of the Near-Surface Wind Environment in the Sahara Desert, North Africa[J],2022,9.
APA	Shi, Weikang,Dong, Zhibao,Chen, Guoxiang,Bai, Ziyi,&Ma, Fang.(2022).Spatial and Temporal Variation of the Near-Surface Wind Environment in the Sahara Desert, North Africa.FRONTIERS IN EARTH SCIENCE,9.
MLA	Shi, Weikang,et al."Spatial and Temporal Variation of the Near-Surface Wind Environment in the Sahara Desert, North Africa".FRONTIERS IN EARTH SCIENCE 9(2022).