A method is proposed for determining the height of the turbulent mixing layer on the basis of the vertical profiles of the dissipation rate of turbulent energy, which is estimated from lidar measurements of the radial wind velocity using conical scanning by a probe beam around the vertical axis. The accuracy of the proposed method is discussed in detail. It is shown that for the estimation of the mixing layer height (MLH) with the acceptable relative error not exceeding 20 %, the signal-to-noise ratio should be no less than −16 dB, when the relative error of lidar estimation of the dissipation rate does not exceed 30 %. The method was tested in a 6 d experiment in which the wind velocity turbulence was estimated in smog conditions due to forest fires in Siberia in summer 2019. The results of the experiment reveal that the relative error of determination of the MLH time series obtained by this method does not exceed 10 % in the period of turbulence development. The estimates of the turbulent mixing layer height by the proposed method are in a qualitative agreement with the MLH estimated from the distributions of the Richardson number in height and time obtained during the comparison experiment in spring 2020.

中文翻译：

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根据多普勒激光雷达测量数据，使用探测光束进行锥形扫描，估算湍流混合层的高度

提出了一种基于湍流能量耗散率的垂直分布来确定湍流混合层高度的方法，该方法是通过使用绕垂直轴的探测光束进行锥形扫描，利用径向扫描的激光雷达对径向风速的测量来估算的。详细讨论了该方法的准确性。结果表明，对于可接受的相对误差不超过20％的混合层高度（MLH）的估计，信噪比应不小于-16 dB，当激光雷达估计的相对误差耗散率不超过30％时。该方法在6天实验中进行了测试，其中估计了2019年夏季西伯利亚森林火灾造成的烟雾条件下的风速湍流。实验结果表明，由此得出的MLH时间序列确定的相对误差在湍流发展时期，该方法不超过10％。通过提出的方法对湍流混合层高度的估计与从2020年春季的比较实验中获得的理查森数在高度和时间上的分布所估计的MLH的定性一致。