Impact of atmospheric stability on vertical wind shear and wind veer in atmospheric boundary layer

doi:10.7523/j.ucas.2022.063

Abstract

Abstract: Vertical wind shear in the atmospheric boundary layer (ABL) is an important factor affecting safety in high-rise buildings, aviation and wind energy industry, therefore the detection and study of vertical wind shear is very important for application and research. In this paper, the accuracy of Lidar and meteorological mast (met mast) on the vertical wind shear was verified by field measurements, and the influence of atmospheric stability on vertical wind shear was studied. The results showed that: 1) the atmospheric stability had a significant effect on wind speed shear and wind direction veer, and the correlation coefficients of wind speed shear and wind direction veer with atmospheric stability are 0.48 and 0.54, respectively; 2) The wind speed shear increased with the potential temperature gradient, and remained 0.35-0.4 when the potential temperature gradient reaches 0.08 K·m^-1; 3) Under the neutral atmospheric condition, the wind direction of the upper and lower layers was more consistent, and the wind direction deflected counterclockwise with the increase of height under stable atmospheric condition, and deflected clockwise with the increase of height under the unstable atmospheric condition. The conclusion in this paper modeled the relationship between wind shear and atmospheric stability by the vertical observation of wind field, which is a good reference and valuable for the research and application related to the vertical structure of wind field.

Key words: wind shear, atmospheric stability, meteorological mast, Lidar, wind speed shear, potential temperature gradient

CLC Number:

P407.5

LIANG Zhi, SHI Yu, ZHANG Zhe, HU Fei. Impact of atmospheric stability on vertical wind shear and wind veer in atmospheric boundary layer[J]. Journal of University of Chinese Academy of Sciences, 2024, 41(3): 365-374.

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