Dust Emission from Gobi under Different Dust Content Conditions: A Wind Tunnel Study atop the Mogao Grottoes

被引:7
|
作者
Liang, Linhao [1 ,2 ,3 ]
Zhang, Weimin [1 ,3 ]
Tan, Lihai [1 ,3 ]
Chen, Shuyi [1 ,2 ,3 ]
机构
[1] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China
[2] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Dunhuang Gobi & Desert Ecol & Environm Res Stn, Northwest Inst Ecoenvironm & Resources, Dunhuang 736200, Peoples R China
基金
中国国家自然科学基金;
关键词
Gobi; PM10; vertical emission flux; wind tunnel; Mogao Grottoes; EROSION; GRAVEL; SOIL; SIMULATION; PARTICLES; DESERTS;
D O I
10.3390/atmos12111498
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Dust emission from the Gobi desert is one of the major sources of global atmospheric aerosols. However, the main factors affecting dust emission from Gobi remain poorly understood. In this paper, field wind tunnel experiments were performed atop the Mogao Grottoes to determine the variation characteristics of the vertical dust flux (F) of particulate matter less than 10 mu m (PM10) for Gobi surfaces with different dust content and wind speeds under external sand supply. The results demonstrate that F obeyed a power function with increasing friction velocity (U-*), and increased exponentially with the increasing surface dust content (C). The index of n-value in the formula F proportional to U-*(n) is taken in the range of 2.02-2.63 under the surface of 27.3-47.3% dust content (<100 mu m), and the dust emission rate was significantly enhanced when the surface dust content exceeded approximately 37%. This study indicates that wind force is the primary dynamic condition affecting Gobi dust emission, and that surface dust content is a significant factor in determining the quantity of dust emission. Furthermore, the contribution of wind force to PM10 emission is greater than the surface dust content, and the higher the height, the greater the weight of friction velocity.
引用
收藏
页数:12
相关论文
共 28 条
  • [1] Dynamic processes of dust emission from gobi: A portable wind tunnel study atop the Mogao Grottoes, Dunhuang, China
    Zhang, Weimin
    Tan, Lihai
    Liang, Linhao
    Chen, Shuyi
    Zhang, Guobin
    Zhan, Hongtao
    Qiu, Fei
    Ma, Shaoxiu
    [J]. AEOLIAN RESEARCH, 2022, 55
  • [2] Investigating the impact factors of dust emission efficiency over gobi with portable wind tunnel field experiments
    Liang, Linhao
    Ma, Shaoxiu
    Zhang, Weimin
    Tan, Lihai
    Chen, Shuyi
    Tsunekawa, Atsushi
    [J]. EARTH SURFACE PROCESSES AND LANDFORMS, 2024, 49 (06) : 2027 - 2041
  • [3] Wind tunnel experiments on dust emissions from different landform types
    Wu Wei
    Yan Ping
    Wang Yong
    Dong Miao
    Meng Xiaonan
    Ji Xinran
    [J]. JOURNAL OF ARID LAND, 2018, 10 (04) : 548 - 560
  • [4] Wind tunnel experiments on dust emissions from different landform types
    WU Wei
    YAN Ping
    WANG Yong
    DONG Miao
    MENG Xiaonan
    JI Xinran
    [J]. Journal of Arid Land, 2018, 10 (04) : 548 - 560
  • [5] Wind tunnel experiments on dust emissions from different landform types
    Wei Wu
    Ping Yan
    Yong Wang
    Miao Dong
    Xiaonan Meng
    Xinran Ji
    [J]. Journal of Arid Land, 2018, 10 : 548 - 560
  • [6] Estimating dust emission from a sandbank on the downstream Jhuoshuei River under strong wind conditions
    Lin, Chi-Wen
    Yeh, Ju-Fang
    [J]. ATMOSPHERIC ENVIRONMENT, 2007, 41 (35) : 7553 - 7561
  • [7] Wind tunnel study of coal dust release from train wagons
    Ferreira, AD
    Vaz, PA
    [J]. JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS, 2004, 92 (7-8) : 565 - 577
  • [8] Dust emission response to precipitation and temperature anomalies under different climatic conditions
    Aryal, Yog
    Evans, Stuart
    [J]. SCIENCE OF THE TOTAL ENVIRONMENT, 2023, 874
  • [9] A WIND-TUNNEL STUDY OF THE DUST EMISSIONS FROM THE CONTINUOUS DUMPING OF COAL
    VISSER, GT
    [J]. ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS, 1992, 26 (08): : 1453 - 1460
  • [10] Potential of dust emission resources using small wind tunnel and GIS: case study of Bakhtegan playa, Iran
    Siroos Karimzadeh
    Mohammad Mehdi Taghizadeh
    [J]. Applied Water Science, 2019, 9