Advanced Search
LIANG Zhi, LIU Lei, SHI Yu, et al. 2023. Mountain Terrain Effects on Lidar Accuracy for Turbulence Measurement [J]. Climatic and Environmental Research (in Chinese), 28 (2): 207−215. doi: 10.3878/j.issn.1006-9585.2022.22025
Citation: LIANG Zhi, LIU Lei, SHI Yu, et al. 2023. Mountain Terrain Effects on Lidar Accuracy for Turbulence Measurement [J]. Climatic and Environmental Research (in Chinese), 28 (2): 207−215. doi: 10.3878/j.issn.1006-9585.2022.22025

Mountain Terrain Effects on Lidar Accuracy for Turbulence Measurement

  • Lidar turbulence measurement in flat terrain and in mountainous terrain are compared, and the error source is discussed. The field data show that the correlation coefficients for wind speed, turbulence kinetic energy (TKE), and turbulence intensity (TI) are 0.995, 0.908, and 0.904; in flat terrain, respectively, 0.999, 0.917, and 0.900; the fitting results in flat terrain are y=1.003x+0.241, y=1.192x+0.091, and y=1.140x+0.006; the fitting results in mountain terrain are y=0.949x+0.119, y=1.606x+0.167, and y=1.131x+0.031. In flat terrain, lidar overestimates wind speed by 2.71%, TKE by 28.3%, and TI by 17%; in mountain terrain, lidar underestimates wind speed by 3.91%, TKE is overestimated by 77.3%, and TI is overestimated by 17.85%. In the line of sight of a laser beam, the correlation coefficient of lidar TI is 0.93, and the fitting formula is y=1.003x−0.003. The results of this paper show that mountain terrain has an effect on lidar measurement of wind speed and turbulence: Lidar overestimated the TKE and TI, while underestimated the wind speed.
  • loading

Catalog

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return