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Advances in Earth Science  2019, Vol. 34 Issue (9): 891-900    DOI: 10.11867/j.issn.1001-8166.2019.09.0891
Progress on Process and Mechanism of Sand and Dust Emission on Gobi
Zhengcai Zhang1(),Kaijia Pan1,2,Aimin Liang1,2,Zhibao Dong3,Xingcai Li4
1. Key Laboratory of Desert and Desertification,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
2. University of Chinese Academy of Sciences,Beijing 100049,China
3. School of Geography and Tourism,Shaanxi Normal University,Xi’ an 710119,China
4. School of Physics & Electronic-Electrical Engineering,Ningxia Key Laboratory of Intelligent Sensing for the Desert Information,Ningxia University,Yinchuan 750021,China
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Gobi is one of the most important landscapes in northwest China, and it is also one of the dust sources in north China and even in central Asia. Based on the different land surface characteristics on the gobi surface, sand and dust emission process and mechanism are obviously different with other landscapes, such as sandy desert. Dust emission process and mechanism on the gobi surface were analyzed in this paper. Wind power system, geomorphology pattern and underlying characteristics were considered for their effect on the sand and dust emission process. Then, the mechanism of land surface characteristics on threshold wind velocity was analyzed. Finally, based on the previous studies on dust emission and mechanism, and in combination with the regional and global requirement, we suggested that the land surface characteristics parameterization, identification of the dust sources and sediment emission mechanism should be the main issues in the future gobi sand and dust research.

Key words:  Gobi      Sand and dust      Process and mechanism.     
Received:  27 July 2019      Published:  15 November 2019
ZTFLH:  P931.3  
Fund: the National Natural Science Foundation of China “Study on the mechanism and model of the alluvial-diluvia gravel desert dust emission in the west Juyan Lake;Alxa Plateau(41971014);The Key Research and Development Program of Ningxia Province of China "Research on key technologies of solar power plant energy efficiency in the desertification region"(2018BFH03004)
Corresponding Authors:  Zhengcai Zhang     E-mail:
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Zhengcai Zhang
Kaijia Pan
Aimin Liang
Zhibao Dong
Xingcai Li

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Zhengcai Zhang, Kaijia Pan, Aimin Liang, Zhibao Dong, Xingcai Li. Progress on Process and Mechanism of Sand and Dust Emission on Gobi. Advances in Earth Science, 2019, 34(9): 891-900.

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Fig.2  Wind regime in the northwest China gobi area
Fig.3  Schematic overview of high-latitude dust sources and sinks in glacial and paraglacial landscapes
(a) Sediment supplement process in the dust source region and mountains; (b) Sediment supplement processes from mountains
Fig.1  Sptial distribution of gobi and dust storm occurring regions in northwest China[24]
戈壁 沙漠 沙地
降雨 <50 mm <200 mm >200 mm
植被 盖度小于5%,零星分布,主要分布在黏土含量较多的低洼地带 与降雨有关,多分布在丘间地 除丘顶外的其余地方
砾石 与戈壁类型有关,以大于2 mm为主
沙源 较少 最多 较多
粉尘含量 以5%~20%为主 <1%,以丘间地含量较多 <5%,以丘间地含量较多
微地形 复杂多样,多与干涸湖盆、干河床和冲沟相间分布 单一 单一
结皮 主要以物理结皮为主 较多
Table 1  Surface properties comparison between gobi and sand desert
Fig.4  Typical gobi surface characteristics
(a)Without crust; (b) With gully and yardang; (c)With gully; (d)With crust; (e)Coexitence of gobi and diluvial deposition; (f)Large area of alluvial deposition in gobi region
Fig.5  The sketch map of sand and dust emission mechanism
(a)Sand and dust material emission processes[46]; (b)The relationship between dust flux and shear velocity; (c)The relationship between shear velocity and land surface parameters[48]
Fig.6  Dust emission field measurements and modeling optimization[46,47,48,54,55,56,57,58,59,60,61,62,63]
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