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首页> 外文会议>24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics >Lidar investigation of wind turbulence on the coastal zone of Lake Baikal at presence of a low-level jet in the atmosphere
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Lidar investigation of wind turbulence on the coastal zone of Lake Baikal at presence of a low-level jet in the atmosphere

机译：在大气中存在低空急流的情况下对贝加尔湖沿岸风湍流的激光雷达研究

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摘要

To study the peculiarities of wind turbulence in the presence of a low-level jet (LLJ) in the atmospheric boundary layer,we used the raw data measured by a Stream Line coherent Doppler lidar on the coast of Lake Baikal in the summer of2015. From these data, the height and time distributions of the of turbulent energy dissipation rate, the variance of windspeed and the integral scale of turbulence were reconstructed. For the first time from lidar measurements, quantitativeestimates of the dissipation rate and the integral scale of turbulence inside the LLJ were obtained with a sufficiently highaccuracy. An excess of the dissipation rate by 1-2 orders in the lower part of the LLJ above the corresponding value inthe upper part of the LLJ is revealed. In the center of the jet stream, the integral scale of turbulence is of the order of 100m, which is 2-3 times less than the effective thickness of the LLJ.
机译：为了研究大气边界层中存在低空急流（LLJ）时风湍流的特殊性，\ r \ n我们使用了夏季贝加尔湖沿岸流线相干多普勒激光雷达测得的原始数据\ r \ n2015。根据这些数据，重构出湍流能量耗散率的高度和时间分布，风速\ n \ n和湍流积分尺度。首次从激光雷达测量中，获得了具有足够高的\ r \ n精确度的RLJ内部耗散率和湍流积分比例的估计值。显示在LLJ下部的相应值之上LLJ下部的耗散率超出1-2个数量级。在射流的中心，湍流的整体尺度约为100 \ r \ nm，比LLJ的有效厚度小2-3倍。

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  • 会议地点 0277-786X;1996-756X
  • 作者

    Igor N. Smalikho; Viktor A. Banakh; Andrey V. Falits;

  • 作者单位

    V.E. Zuev Institute of Atmospheric Optics Siberian branch of RAS 1, Academician Zuev square, 634055, Tomsk, Russia smalikho@iao.ru phone +7 3822 493595 fax +7 3822 492086;

    V.E. Zuev Institute of Atmospheric Optics Siberian branch of RAS1, Academician Zuev square, 634055, Tomsk, Russia;

    V.E. Zuev Institute of Atmospheric Optics Siberian branch of RAS1, Academician Zuev square, 634055, Tomsk, Russia;

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