Characteristics of Surface Wind Field in the Hobq Desert from 1957 to 2014

Xiao Nan; Dong Zhibao; Nan Weige; Cui Xujia; Li Chao; Xiao Weiqiang; Li Lulu

doi:10.7522/j.issn.1000-694X.2017.00034

Journal of Desert Research >

2018 , Vol. 38 >Issue 3: 628 - 636

DOI: https://doi.org/10.7522/j.issn.1000-694X.2017.00034

Characteristics of Surface Wind Field in the Hobq Desert from 1957 to 2014

Xiao Nan ,
Dong Zhibao ,
Nan Weige ,
Cui Xujia ,
Li Chao ,
Xiao Weiqiang ,
Li Lulu

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1. College of Tourism & Environment, Shaanxi Normal University, Xi'an 710062, China;
2. National Demonstration Center for Experimental Geography Education(Shaanxi Normal University), Shaanxi Normal University, Xi'an 710062, China;
3. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Received date: 2016-12-27

Revised date: 2017-04-28

Online published: 2018-11-06

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Abstract

Sandy desertification is greatly influenced by wind, and threshold wind of transporting sand is major power shaping desert landform pattern. We analyzed surface wind field from wind speed, wind direction and sand drift potential by surface wind data from four national basic meteorological stations around the Hobq Desert from 1957 to 2014. The results showed that:(1) The correlation of mean wind speed and frequency of threshold wind of transporting sand is significant in the Hobq Desert. (2) Annual mean wind speed is 2.7 m·s^-1, and prevailing wind direction is WNW-NW, and the wind direction variability is intermediate. The resultant drift direction is around 310°. The wind speed is the largest in April with intermediate wind direction variability; the wind speed is relatively little in August with high wind direction variability and the wind speed is the least in January with low wind direction variability. The wind speed is the largest from March to June with intermediate wind direction concentration; the wind speed is relatively large from November to February with high wind direction concentration and the wind speed is the least from July to October with low wind direction concentration. (3) There is a great tendency change for the wind speed, the frequency of threshold wind of transporting sand and sand drift potential in mid and late 1980s and around 2007, and there is a trend from decrease to increase around 2007. (4) It is the change of atmospheric circulation and surface roughness length that significantly changes surface wind field in the Hobq Desert.

Key words： surface wind field; threshold wind of transporting sand; sand drift potential; wind regime; Hobq Desert

Cite this article

Xiao Nan , Dong Zhibao , Nan Weige , Cui Xujia , Li Chao , Xiao Weiqiang , Li Lulu . Characteristics of Surface Wind Field in the Hobq Desert from 1957 to 2014[J]. Journal of Desert Research, 2018 , 38(3) : 628 -636 . DOI: 10.7522/j.issn.1000-694X.2017.00034

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