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[1]ZHENG Xiannian,YANG Xinghua,HE Qing,et al.Characteristics of Wind Velocity Fluctuation During the Sand-Storm Weather in Hinterland of Takliakan Desert[J].Research of Soil and Water Conservation,2020,27(01):366-371.

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Characteristics of Wind Velocity Fluctuation During the Sand-Storm Weather in Hinterland of Takliakan Desert

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 27 Number of periods: 2020 01 Page number: 366-371 Column: Public date: 2020-02-20

Title:: Characteristics of Wind Velocity Fluctuation During the Sand-Storm Weather in Hinterland of Takliakan Desert

Author(s):: ZHENG Xiannian^1,2,3, YANG Xinghua^2,3, HE Qing^2,3,4, JIN Lili^2,3, YANG Fan^2,3, Ali·Mamtimin^2,3, ZHOU Chenglong^2,3, ZHANG Jiantao^2,3; (1.Xinjiang Climate Center, Urumqi 830002 China; 2.Institute Desert Meteorology, CMA, Urumqi 830002, China; 3.Meteorological Field Test Base of Taklimakan Desert of China Meteorological Administration, Tazhong, Xinjiang 841000, China; 4.Xinjiang Meteorological Observatory, Urumqi 830002 China)

Keywords:: constructed green land; near ground surface; wind velocity fluctuation; fluctuation intensity; Tazhong

CLC:: Q359

DOI:: -

Abstract:: Basing on the observation data of 80 m wind speed in the near-surface layer during two sandstorms in the constructed green land of Taklimakan Desert, the characteristics of wind pulsation in the near-surface layer and its relationship with visibility, PM₁₀ and PM_2.5 under sandstorm weather are discussed. It lays the foundation for further research on wind erosion and potential sand blowing in turbulent conditions. The results show that:(1)the pulsation values of wind speeds at different heights are approximately Gaussian distribution with the change of height, and the volatility is consistent in time series; the pulsation frequency is unstable and no obvious periodicity, and there is significant correlation between adjacent heights;(2)the fluctuation intensity is increasing with the increase of wind speed, and increases at first and then decreases with the decrease of the height of the surface; the turbulence is inversely proportional to the height, and the overall increases with the decrease of the height, because the bottom layer is increased by the presence of surface vegetation;(3)the magnitude of ground wind speed in sandstorm process has a direct impact on horizontal visibility, PM₁₀ and PM_2.5. Wind speed pulsation changes are inversely related to horizontal visibility, and are proportional to PM₁₀ and PM_2.5.

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Last Update: 2020-02-25